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WO2020202715A1 - Medical tubular body delivery device - Google Patents

Medical tubular body delivery device
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WO2020202715A1
WO2020202715A1PCT/JP2020/001908JP2020001908WWO2020202715A1WO 2020202715 A1WO2020202715 A1WO 2020202715A1JP 2020001908 WJP2020001908 WJP 2020001908WWO 2020202715 A1WO2020202715 A1WO 2020202715A1
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tube
traction member
tubular body
outer tube
medical tubular
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French (fr)
Japanese (ja)
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想生 市村
鈴木 健太郎
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Kaneka Corp
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Kaneka Corp
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Priority to JP2021511130Aprioritypatent/JP7329043B2/en
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Abstract

A medical tubular body delivery device (1) that has: an outside tube (3) that has a medical tubular body (20) arranged in the lumen thereof; a linear traction member (7) that is connected to a proximal end part of the outside tube (3); an inside tube (4) that is arranged in the lumen of the outside tube (3) and the lumen of the medical tubular body (20) and extends further to the proximal side than a proximal end (3P) of the outside tube (3); and a protection tube (5) that has the proximal end part of the outside tube (3), the portion of the inside tube (4) that extends further to the proximal side than the proximal end (3P) of the outside tube (3), and the linear traction member (7) arranged in the lumen thereof. A holding member (9) that restrains the linear traction member (7) and the inside tube (4) is provided in the lumen of the protection tube (5). The holding member (9) is formed so as to be capable of moving in the distal-proximal direction relative to the linear traction member (7).

Description

Translated fromJapanese
医療用管状体搬送装置Medical tubular body transport device

 本発明は、ステントなどの医療用管状体を体内に搬送する装置である医療用管状体搬送装置に関するものである。The present invention relates to a medical tubular body transport device which is a device for transporting a medical tubular body such as a stent into the body.

 ステントに代表される医療用管状体は、胆管や膵管等の消化管、腸骨動脈等の血管等の生体内管腔が狭窄または閉塞することにより生じる様々な疾患を治療するための医療器具である。医療用管状体には、狭窄または閉塞部位等の病変部を内側から拡張し、その管腔内径を維持するために病変部に留置するもの、あるいは、病変部またはその周囲に発生した血栓等を絡め取り体外へ除去し、その病変部における管腔内径を回復させるもの等がある。A medical tubular body represented by a stent is a medical device for treating various diseases caused by stenosis or occlusion of a living lumen such as a gastrointestinal tract such as a bile duct or a pancreatic duct and a blood vessel such as an iliac artery. is there. The medical tubular body includes a lesion such as a stenosis or an obstruction that is expanded from the inside and placed in the lesion to maintain the inner diameter of the lumen, or a thrombus that has formed in or around the lesion. Some are entangled and removed to the outside of the body to restore the inner diameter of the lumen at the lesion.

 内視鏡を用いた医療用管状体での治療の一例として、胆管がんで閉塞した胆道において、胆管内から十二指腸側への胆汁の排出(ドレナージ)を行うために、胆道に医療用管状体を留置する方法について以下に説明する。まず、口から十二指腸の胆管の入口(乳頭)まで内視鏡を挿入する。次に、内視鏡を通じて、ガイドワイヤを病変部まで搬送する。さらに、ガイドワイヤに沿って医療用管状体搬送装置を病変部まで搬送する。そして、医療用管状体搬送装置を操作し、医療用管状体を病変部に留置する。As an example of treatment with a medical tubular body using an endoscope, in a biliary tract obstructed by bile duct cancer, a medical tubular body is placed in the biliary tract in order to drain bile from the bile duct to the duodenum side. The method of indwelling will be described below. First, an endoscope is inserted from the mouth to the entrance (papillary) of the bile duct of the duodenum. Next, the guide wire is conveyed to the lesion through the endoscope. In addition, the medical tubular body transport device is transported to the lesion along the guide wire. Then, the medical tubular body transport device is operated to place the medical tubular body in the lesion portion.

 医療用管状体搬送装置として、例えば特許文献1には、ガイドワイヤルーメンを有する先端側チューブと、先端側チューブの基端部に先端部が固定された基端側チューブと、先端側チューブの先端側を被包しかつ先端側チューブの基端方向に摺動可能であるステント収納用筒状部材と、ステント収納用筒状部材内に収納されたステントと、ステント収納用筒状部材に一端部が固定され基端側チューブ内を延びる牽引部材とを備える生体器官拡張器具が開示されている。As a medical tubular body transport device, for example,Patent Document 1 describes a distal end tube having a guide wire lumen, a proximal end tube having a distal end fixed to the proximal end of the distal tube, and a distal end of the distal tube. A tubular member for storing a stent that covers the side and is slidable in the direction of the proximal end of the tube on the distal end side, a stent housed in the tubular member for storing the stent, and one end of the tubular member for storing the stent. Disclosed is a biological organ dilation device comprising a traction member that is fixed and extends within a proximal tube.

特開2006-271565号公報Japanese Unexamined Patent Publication No. 2006-271565

 特許文献1に開示される生体器官拡張器具では、医療用管状体であるステントを、先端側チューブとステント収納用筒状部材の間に配置して病変部まで搬送し、病変部でステント収納用筒状部材の基端側に固定された牽引部材を近位側に牽引することで、ステント収納用筒状部材からステントを露出させて、病変部でステントを展開して留置することができる。ところで、特許文献1の生体器官拡張器具は牽引部材がワイヤから構成されており、このような牽引部材を備えた生体器官拡張器具は、医療用管状体を病変部まで搬送する際に体腔内を屈曲しながら進行することにより、ワイヤ状の牽引部材が先端側チューブに巻き付いたり、医療用管状体を展開させるために牽引部材を近位側に引く際に、先端側チューブと牽引部材との間に屈曲差が生じて牽引部材が先端側チューブ等と強く接触して、牽引抵抗が大きくなるおそれがある。その結果、医療用管状体を体内に留置する際に、牽引部材を好適に牽引できなくなるおそれがある。In the biological organ dilation device disclosed inPatent Document 1, a stent, which is a medical tubular body, is placed between the distal tube and the tubular member for storing the stent and transported to the lesion portion, and the stent is stored in the lesion portion. By pulling the traction member fixed to the proximal end side of the tubular member to the proximal side, the stent can be exposed from the stent storage tubular member, and the stent can be deployed and placed at the lesion. By the way, in the biological organ expansion device ofPatent Document 1, the traction member is composed of a wire, and the biological organ expansion device provided with such a traction member moves through the body cavity when the medical tubular body is transported to the lesion portion. By advancing while bending, between the distal tube and the traction member when the wire-like traction member wraps around the distal tube or pulls the traction member proximally to deploy a medical tubular body. There is a risk that the traction member will come into strong contact with the tip side tube or the like due to a bending difference, and the traction resistance will increase. As a result, when the medical tubular body is placed in the body, the traction member may not be able to be towed suitably.

 本発明は前記事情に鑑みてなされたものであり、その目的は、線状牽引部材を備えた医療用管状体搬送装置であって、医療用管状体を体内に挿入して病変部まで搬送する際に線状牽引部材が内部で巻き付きにくく、また医療用管状体を体内に留置する際に線状牽引部材の牽引操作を好適に行うことができる医療用管状体搬送装置を提供することにある。The present invention has been made in view of the above circumstances, and an object of the present invention is a medical tubular body transport device provided with a linear traction member, in which a medical tubular body is inserted into a body and transported to a lesion portion. It is an object of the present invention to provide a medical tubular body transport device in which the linear traction member is difficult to wrap inside and the linear traction member can be preferably pulled when the medical tubular body is placed in the body. ..

 前記課題を解決することができた本発明の医療用管状体搬送装置とは、医療用管状体を体内に搬送する装置であって;医療用管状体が内腔に配置される外側チューブと;外側チューブの近位端部に接続され、外側チューブの近位端より近位側に延在する線状牽引部材と;外側チューブの内腔と医療用管状体の内腔に配置されるとともに、外側チューブの近位端より近位側に延在する内側チューブと;外側チューブの近位端部と、内側チューブの外側チューブの近位端より近位側に延在する部分と、線状牽引部材とが内腔に配置された保護チューブとを有し;保護チューブの内腔には、線状牽引部材と内側チューブとを拘束する保持部材が設けられ、保持部材が線状牽引部材に対して遠近方向に移動可能に形成されているところに特徴を有する。本発明の医療用管状体搬送装置は、保持部材が、遠近方向の長さが縮小可能であるものであってもよい。The medical tubular body transport device of the present invention that has been able to solve the above problems is a device that transports the medical tubular body into the body; and an outer tube in which the medical tubular body is arranged in the lumen; With a linear traction member connected to the proximal end of the outer tube and extending proximally from the proximal end of the outer tube; as well as being placed in the lumen of the outer tube and the lumen of the medical tubular body An inner tube that extends proximal to the proximal end of the outer tube; a proximal end of the outer tube, a portion of the inner tube that extends proximal to the proximal end of the outer tube, and linear traction. The member has a protective tube arranged in the lumen; the lumen of the protective tube is provided with a holding member that restrains the linear traction member and the inner tube, and the holding member is relative to the linear traction member. It is characterized in that it is formed so as to be movable in the perspective direction. In the medical tubular body transport device of the present invention, the holding member may be one whose length in the perspective direction can be reduced.

 本発明の医療用管状体搬送装置は、線状牽引部材と内側チューブとを拘束する保持部材が設けられているため、搬送装置を体内に挿入して医療用管状体を病変部に搬送する際、線状牽引部材が内側チューブに巻き付くことを抑えることができ、また手元側からのトルク伝達性を高めることができる。医療用管状体を体内に留置するために線状牽引部材を近位側に引く際は、保持部材によって線状牽引部材と内側チューブとの屈曲差が広がることを抑えることができるため、線状牽引部材を好適に牽引することができる。なお、「屈曲差」とは、2つ以上の部材どうしの屈曲径が異なることを意味する。Since the medical tubular body transport device of the present invention is provided with a holding member that restrains the linear traction member and the inner tube, when the transport device is inserted into the body to transport the medical tubular body to the lesion portion. , It is possible to suppress the linear traction member from wrapping around the inner tube, and it is possible to improve the torque transmission from the hand side. When the linear traction member is pulled proximally to place the medical tubular body in the body, the holding member can prevent the linear traction member from widening the bending difference between the inner tube, so that the linear traction member is linear. The towing member can be preferably towed. The "bending difference" means that the bending diameters of two or more members are different.

 保持部材は複数設けられていることが好ましい。保持部材を複数設けることにより、線状牽引部材の内側チューブへの巻き付きを防止したり、線状牽引部材と内側チューブとの屈曲差が広がることを抑えつつ、保持部材と線状牽引部材との接触抵抗の増大を抑えることができる。It is preferable that a plurality of holding members are provided. By providing a plurality of holding members, the holding member and the linear traction member can be separated from each other while preventing the linear traction member from wrapping around the inner tube and suppressing the bending difference between the linear traction member and the inner tube from widening. It is possible to suppress an increase in contact resistance.

 保持部材が複数設けられる場合、複数の保持部材の遠近方向の離間間隔は10mm以上50mm以下であることが好ましい。複数の保持部材の遠近方向の離間間隔を50mm以下とすることにより、線状牽引部材の内側チューブへの巻き付きを防止しやすくなり、また線状牽引部材を近位側に引く際に、線状牽引部材と内側チューブとの屈曲差が広がることを抑えやすくなる。一方、複数の保持部材の遠近方向の離間間隔を10mm以上とすることにより、線状牽引部材を近位側に引く際に、保持部材と線状牽引部材との接触抵抗の増大を抑えることができる。When a plurality of holding members are provided, the distance between the plurality of holding members in the perspective direction is preferably 10 mm or more and 50 mm or less. By setting the distance between the plurality of holding members in the perspective direction to 50 mm or less, it becomes easy to prevent the linear traction member from wrapping around the inner tube, and when the linear traction member is pulled to the proximal side, the linear traction member is linear. It becomes easy to suppress the widening of the bending difference between the traction member and the inner tube. On the other hand, by setting the distance between the plurality of holding members in the perspective direction to 10 mm or more, it is possible to suppress an increase in contact resistance between the holding member and the linear traction member when the linear traction member is pulled to the proximal side. it can.

 保持部材は、近位側または遠位側から見て、単環状に形成されていることが好ましい。保持部材を単環状に形成することにより、遠近方向に対する垂直断面で、線状牽引部材と内側チューブをコンパクトにまとめることができ、保護チューブの外径を小さく形成することができる。The holding member is preferably formed in a monocyclic shape when viewed from the proximal side or the distal side. By forming the holding member in a single ring shape, the linear traction member and the inner tube can be compactly combined in a vertical cross section with respect to the perspective direction, and the outer diameter of the protective tube can be made small.

 単環状に形成された保持部材の無負荷時の内径は、線状牽引部材の外径と内側チューブの外径の和よりも小さいことが好ましい。このように保持部材が形成されていれば、線状牽引部材の牽引操作を行わない状態で、保持部材を線状牽引部材および内側チューブの所定の位置に保持することが容易になる。そのため、搬送装置を体内に挿入して医療用管状体を病変部に搬送する際、線状牽引部材と内側チューブに対して保持部材が初期の位置に維持されやすくなり、保持部材を設けることの効果が好適に発揮されやすくなる。The inner diameter of the holding member formed in a single ring shape when no load is applied is preferably smaller than the sum of the outer diameter of the linear traction member and the outer diameter of the inner tube. When the holding member is formed in this way, it becomes easy to hold the holding member at a predetermined position of the linear traction member and the inner tube without pulling the linear traction member. Therefore, when the transport device is inserted into the body to transport the medical tubular body to the lesion portion, the holding member is easily maintained in the initial position with respect to the linear traction member and the inner tube, and the holding member is provided. The effect is more likely to be exhibited favorably.

 保持部材は、線状牽引部材および内側チューブに対して遠近方向に移動可能に形成されていることが好ましい。これにより、線状牽引部材をよりスムーズに近位側に牽引することができる。It is preferable that the holding member is formed so as to be movable in the perspective direction with respect to the linear traction member and the inner tube. As a result, the linear traction member can be towed more smoothly toward the proximal side.

 保持部材の遠近方向の長さは1mm以上10mm以下であることが好ましい。保持部材をこのような大きさで形成することにより、保持部材の強度を確保しやすくなり、また線状牽引部材を近位側に引く際に、保持部材と線状牽引部材との接触抵抗を抑えることができる。The length of the holding member in the perspective direction is preferably 1 mm or more and 10 mm or less. By forming the holding member in such a size, it becomes easy to secure the strength of the holding member, and when the linear traction member is pulled to the proximal side, the contact resistance between the holding member and the linear traction member is increased. It can be suppressed.

 保護チューブの内腔には、線状牽引部材が内腔に挿通されている牽引部材収納チューブが設けられ、保持部材は、外側チューブの近位端より近位側かつ牽引部材収納チューブの遠位端より遠位側に配置されていることが好ましい。牽引部材収納チューブの内腔に線状牽引部材を挿通することにより、線状牽引部材が保持部材によって内側チューブと拘束されない部分で、線状牽引部材が保護チューブの内部で迷入することや、線状牽引部材が牽引部材収納チューブ以外の部材に巻き付くことや、線状牽引部材に極度な撓みが発生することを防ぐことができる。The cavity of the protective tube is provided with a traction member storage tube through which a linear traction member is inserted, and the holding member is proximal to the proximal end of the outer tube and distal to the traction member storage tube. It is preferably located distal to the end. By inserting the linear traction member into the cavity of the traction member storage tube, the linear traction member can get lost inside the protective tube at the part where the linear traction member is not restrained from the inner tube by the holding member, or the wire It is possible to prevent the linear traction member from wrapping around a member other than the traction member storage tube and to prevent the linear traction member from being extremely bent.

 保持部材は、外側チューブが最も遠位側にある状態で、外側チューブの近位端と牽引部材収納チューブの遠位端との中間点から20mm以内に配置されていることが好ましい。このように保持部材を配置することにより、線状牽引部材の内側チューブへの巻き付きをより防止しやすくなり、手元側からのトルク伝達性をより高めることができる。It is preferable that the holding member is arranged within 20 mm from the midpoint between the proximal end of the outer tube and the distal end of the traction member storage tube with the outer tube on the most distal side. By arranging the holding member in this way, it becomes easier to prevent the linear traction member from wrapping around the inner tube, and torque transmission from the hand side can be further enhanced.

 保持部材は、外側チューブが最も遠位側にある状態で、牽引部材収納チューブの遠位端から遠位側に20mm以内に配置されていることも好ましい。このように保持部材を配置することにより、線状牽引部材を近位側に引く際の抵抗の増大を抑えることができ、また、線状牽引部材が牽引部材収納チューブに安定して収納されやすくなる。It is also preferable that the holding member is arranged within 20 mm from the distal end of the traction member storage tube to the distal side with the outer tube on the most distal side. By arranging the holding member in this way, it is possible to suppress an increase in resistance when the linear traction member is pulled to the proximal side, and the linear traction member can be easily stably stored in the traction member storage tube. Become.

 保持部材は、外側チューブが最も遠位側にある状態で、外側チューブの近位端から近位側に20mm以内に配置されていることも好ましい。このように保持部材を配置することにより、線状牽引部材を近位側に引く際の抵抗の増大を抑えることができ、また、線状牽引部材が外側チューブの近位端部の所定の位置に安定して接続されやすくなる。It is also preferable that the holding member is arranged within 20 mm from the proximal end of the outer tube to the proximal side with the outer tube on the most distal side. By arranging the holding member in this way, it is possible to suppress an increase in resistance when the linear traction member is pulled to the proximal side, and the linear traction member is positioned at a predetermined position at the proximal end of the outer tube. It becomes easy to connect stably to.

 本発明の医療用管状体搬送装置は、線状牽引部材と内側チューブとを拘束する保持部材が設けられているため、搬送装置を体内に挿入して医療用管状体を病変部に搬送する際、線状牽引部材が内側チューブに巻き付くことを抑えることができる。医療用管状体を体内に留置するために線状牽引部材を近位側に引く際は、保持部材によって線状牽引部材と内側チューブとの屈曲差が広がることを抑えることができるため、線状牽引部材を好適に牽引することができる。Since the medical tubular body transport device of the present invention is provided with a holding member that restrains the linear traction member and the inner tube, when the transport device is inserted into the body to transport the medical tubular body to the lesion portion. , It is possible to prevent the linear traction member from wrapping around the inner tube. When the linear traction member is pulled proximally to place the medical tubular body in the body, the holding member can prevent the linear traction member from widening the bending difference between the inner tube, so that the linear traction member is linear. The towing member can be preferably towed.

本発明の実施の形態に係る医療用管状体搬送装置の全体図を表す。The whole view of the medical tubular body transporting apparatus which concerns on embodiment of this invention is shown.図1に示した医療用管状体搬送装置の外側チューブ、内側チューブおよび保護チューブを含む部分であって、外側チューブの内腔に医療用管状体が収納された状態の平面図を表す。A plan view of a portion of the medical tubular body transport device shown in FIG. 1 including an outer tube, an inner tube, and a protective tube, in which the medical tubular body is housed in the lumen of the outer tube.図2に示した医療用管状体搬送装置の外側チューブ、内側チューブおよび保護チューブを含む部分において、外側チューブを近位側に移動させて医療用管状体を径方向に拡張させた状態の平面図を表す。Top view of the medical tubular body transport device shown in FIG. 2 in a state where the medical tubular body is expanded in the radial direction by moving the outer tube to the proximal side in the portion including the outer tube, the inner tube and the protective tube. Represents.医療用管状体搬送装置の外側チューブの近位端部とその近傍部分の遠近方向に沿った部分断面図の一例を表し、図4(a)は、外側チューブが最も遠位側に位置する状態が示されており、図4(b)は、線状牽引部材を近位側に牽引して、外側チューブを近位側に移動させた状態が示されている。An example of a partial cross-sectional view of the proximal end of the outer tube of the medical tubular body transport device and its vicinity along the perspective direction is shown, and FIG. 4A shows a state in which the outer tube is located on the most distal side. Is shown, and FIG. 4B shows a state in which the linear traction member is towed to the proximal side and the outer tube is moved to the proximal side.医療用管状体搬送装置の外側チューブの近位端部とその近傍部分の遠近方向に沿った部分断面図の他の一例を表し、図5(a)は、外側チューブが最も遠位側に位置する状態が示されており、図5(b)は、線状牽引部材を近位側に牽引して、外側チューブを近位側に移動させた状態が示されている。Another example of a partial cross-sectional view of the proximal end of the outer tube of a medical tubular body carrier and its vicinity along the perspective direction is shown in FIG. 5 (a), where the outer tube is located most distally. FIG. 5 (b) shows a state in which the linear traction member is towed to the proximal side and the outer tube is moved to the proximal side.医療用管状体搬送装置の内側チューブ、保護チューブ、線状牽引部材を含む部分の径方向の断面図の一例を表す。An example of a radial cross-sectional view of a portion including an inner tube, a protective tube, and a linear traction member of a medical tubular body transport device is shown.

 以下、下記実施の形態に基づき本発明を具体的に説明するが、本発明はもとより下記実施の形態によって制限を受けるものではなく、前・後記の趣旨に適合し得る範囲で適当に変更を加えて実施することも勿論可能であり、それらはいずれも本発明の技術的範囲に包含される。なお、各図面において、便宜上、ハッチングや部材符号等を省略する場合もあるが、かかる場合、明細書や他の図面を参照するものとする。また、図面における種々部材の寸法は、本発明の特徴の理解に資することを優先しているため、実際の寸法とは異なる場合がある。Hereinafter, the present invention will be specifically described based on the following embodiments, but the present invention is not limited by the following embodiments as well as the present invention, and appropriate modifications are made to the extent that it can be adapted to the purpose of the above and the following. Of course, it is also possible to carry out the above, and all of them are included in the technical scope of the present invention. In each drawing, hatching, member reference numerals, and the like may be omitted for convenience, but in such cases, the specification and other drawings shall be referred to. In addition, the dimensions of various members in the drawings may differ from the actual dimensions because priority is given to contributing to the understanding of the features of the present invention.

 図1~図3を参照して、医療用管状体搬送装置の基本構成について説明する。図1は、医療用管状体搬送装置の全体平面図を表し、図2は、図1に示した医療用管状体搬送装置の部分平面図であって、医療用管状体が搬送装置内に収納された状態の平面図を表し、図3は、図2に示した医療用管状体搬送装置において、外側チューブを近位側に移動させ、医療用管状体が搬送装置から露出して径方向に拡張した状態の平面図を表す。The basic configuration of the medical tubular body transport device will be described with reference to FIGS. 1 to 3. FIG. 1 is an overall plan view of the medical tubular body transport device, and FIG. 2 is a partial plan view of the medical tubular body transport device shown in FIG. 1, in which the medical tubular body is housed in the transport device. In the medical tubular body transport device shown in FIG. 2, the outer tube is moved to the proximal side, and the medical tubular body is exposed from the transport device in the radial direction. Represents a plan view in an expanded state.

 医療用管状体搬送装置1は、ステント等の医療用管状体20を体内に搬送する医療用の装置である。医療用管状体搬送装置1は、外側チューブ3と内側チューブ4と保護チューブ5を含む長尺状の装置であり、これらのチューブの延在方向を遠近方向と称する。医療用管状体搬送装置1の近位側とは、医療用管状体搬送装置1の遠近方向に対する使用者の手元側を指し、遠位側とは近位側の反対方向、すなわち処置対象側の方向を指す。図1~図3では、図面の右側が近位側に相当し、図面の左側が遠位側に相当する。また、遠近方向に対する垂直方向を径方向と称する。以下、「医療用管状体搬送装置」を単に「搬送装置」と称する場合がある。The medical tubularbody transport device 1 is a medical device that transports a medicaltubular body 20 such as a stent into the body. The medical tubularbody transport device 1 is a long device including anouter tube 3, aninner tube 4, and aprotective tube 5, and the extending direction of these tubes is referred to as a perspective direction. The proximal side of the medical tubularbody transport device 1 refers to the user's hand side with respect to the perspective direction of the medical tubularbody transport device 1, and the direction opposite to the distal side, that is, the treatment target side. Point in the direction. In FIGS. 1 to 3, the right side of the drawing corresponds to the proximal side, and the left side of the drawing corresponds to the distal side. Further, the direction perpendicular to the perspective direction is referred to as a radial direction. Hereinafter, the "medical tubular body transport device" may be simply referred to as a "transport device".

 搬送装置1は、外側チューブ3と内側チューブ4と保護チューブ5を有する。以下、外側チューブと内側チューブと保護チューブをまとめて「シャフト部」と称する場合がある。搬送装置1は血管や消化管の治療に用いられ、例えば内視鏡を用いた治療の場合は、シャフト部2が内視鏡の鉗子口から鉗子チャンネル内に挿入され、病変部まで搬送される。搬送装置1は、シャフト部2の近位側に設けられたコントローラー12を操作することにより、外側チューブ3を内側チューブ4と保護チューブ5に対して遠近方向に移動させることができる。Thetransport device 1 has anouter tube 3, aninner tube 4, and aprotective tube 5. Hereinafter, the outer tube, the inner tube, and the protective tube may be collectively referred to as a "shaft portion". Thetransport device 1 is used for treatment of blood vessels and gastrointestinal tract. For example, in the case of treatment using an endoscope, theshaft portion 2 is inserted into the forceps channel from the forceps opening of the endoscope and transported to the lesion portion. .. Thetransport device 1 can move theouter tube 3 in the perspective direction with respect to theinner tube 4 and theprotective tube 5 by operating thecontroller 12 provided on the proximal side of theshaft portion 2.

 外側チューブ3はシャフト部2の遠位部に位置し、外側チューブ3の内腔に医療用管状体20が配置される。外側チューブ3は、内側チューブ4および保護チューブ5に対して遠近方向に移動可能に形成され、図2は、外側チューブ3が最も遠位側に位置する状態を示しており、図3は、外側チューブ3が最も近位側に位置する状態を示している。外側チューブ3は、医療用管状体20を病変部まで搬送する際、図2に示されるように、医療用管状体20がシャフト部2の外側に露出しないように保護する。外側チューブ3はまた、医療用管状体20の搬送の際に医療用管状体20を縮径状態に保持するように機能し、これにより医療用管状体20の病変部への搬送を容易にする。外側チューブ3の遠近方向の長さは、内腔に配置する医療用管状体20の遠近方向の長さに応じて適宜設定することができ、例えば50mm~800mm程度とすることができる。外側チューブ3が遠近方向に移動可能な範囲は、外側チューブ3の内腔に配置される医療用管状体20の遠近方向の長さに応じて適宜設定することができ、医療用管状体20の遠近方向の長さよりも長いことが好ましい。外側チューブ3の外径は、例えば0.5mm~3.5mm程度とすればよい。Theouter tube 3 is located at the distal portion of theshaft portion 2, and the medicaltubular body 20 is arranged in the lumen of theouter tube 3. Theouter tube 3 is formed so as to be movable in the perspective direction with respect to theinner tube 4 and theprotective tube 5, FIG. 2 shows a state in which theouter tube 3 is located on the most distal side, and FIG. 3 shows a state in which theouter tube 3 is located on the most distal side. It shows the state where thetube 3 is located on the most proximal side. Theouter tube 3 protects the medicaltubular body 20 from being exposed to the outside of theshaft portion 2 as shown in FIG. 2 when the medicaltubular body 20 is transported to the lesion portion. Theouter tube 3 also functions to hold the medicaltubular body 20 in a reduced diameter state during transport of the medicaltubular body 20, thereby facilitating transport of the medicaltubular body 20 to the lesion. .. The perspective length of theouter tube 3 can be appropriately set according to the perspective length of the medicaltubular body 20 arranged in the lumen, and can be, for example, about 50 mm to 800 mm. The range in which theouter tube 3 can move in the perspective direction can be appropriately set according to the length in the perspective direction of the medicaltubular body 20 arranged in the lumen of theouter tube 3, and the medicaltubular body 20 can be moved. It is preferably longer than the perspective length. The outer diameter of theouter tube 3 may be, for example, about 0.5 mm to 3.5 mm.

 医療用管状体20としては、代表的にはステントが挙げられる。ステントを用いることにより、胆管等の消化管や血管等の生体内管腔が狭窄または閉塞することによって生じる様々な疾患を治療することができる。医療用管状体20には、1本の線状の金属または高分子材料から形成されたコイル状の医療用管状体、金属チューブや高分子材料からなるチューブをレーザーなどで切り抜き加工した医療用管状体、線状の部材を溶接して組み立てた医療用管状体、複数の線状金属を織って作った医療用管状体等がある。医療用管状体としては、ステント以外にも、ステントグラフト、閉塞具、注入カテーテル、プロテーゼ弁等を用いることもできる。A typical example of the medicaltubular body 20 is a stent. By using a stent, it is possible to treat various diseases caused by stenosis or occlusion of a digestive tract such as a bile duct or an in vivo lumen such as a blood vessel. The medicaltubular body 20 includes a coiled medical tubular body formed of a single linear metal or polymer material, or a medical tubular body obtained by cutting out a metal tube or a tube made of a polymer material with a laser or the like. There are a body, a medical tubular body assembled by welding linear members, a medical tubular body made by weaving a plurality of linear metals, and the like. As the medical tubular body, in addition to the stent, a stent graft, an occlusion tool, an injection catheter, a prosthesis valve and the like can also be used.

 医療用管状体20は、拡張機構の観点から、(i)バルーン表面上に医療用管状体を装着(マウント)して病変部まで搬送し、病変部でバルーンによって医療用管状体を拡張するバルーン拡張型と、(ii)拡張を抑制した状態で医療用管状体を病変部まで搬送し、病変部で拡張を抑制する部材を取り外すことにより自ら拡張する自己拡張型とに分類することができる。搬送装置1は、自己拡張型の医療用管状体を搬送するのに好適に用いられ、外側チューブ3が医療用管状体20の拡張を抑制する部材として機能する。従って、医療用管状体20は、外側チューブ3の内腔に設置された状態においては、径方向に縮小し、長手軸方向に伸びることにより、拡張状態よりも細長い円筒状の形態である縮径状態となる。自己拡張型の医療用管状体は、内部にバルーンを設けなくてもよいことから、バルーン拡張型の医療用管状体に比べて縮径状態の径を小さくすることができる。From the viewpoint of the expansion mechanism, the medicaltubular body 20 is (i) a balloon in which the medical tubular body is mounted (mounted) on the surface of the balloon and transported to the lesion portion, and the medical tubular body is expanded by the balloon at the lesion portion. It can be classified into an expansion type and a self-expansion type in which the medical tubular body is transported to the lesion portion in a state where the expansion is suppressed and the member that suppresses the expansion is removed at the lesion portion to expand by itself. Thetransport device 1 is suitably used for transporting a self-expandable medical tubular body, and theouter tube 3 functions as a member that suppresses the expansion of the medicaltubular body 20. Therefore, when the medicaltubular body 20 is installed in the lumen of theouter tube 3, the medicaltubular body 20 contracts in the radial direction and extends in the longitudinal axis direction, so that the diameter of the medicaltubular body 20 is a cylindrical form elongated from the expanded state. It becomes a state. Since the self-expandable medical tubular body does not need to be provided with a balloon inside, the diameter of the reduced diameter state can be made smaller than that of the balloon-expandable medical tubular body.

 内側チューブ4は、外側チューブ3の内腔と医療用管状体20の内腔に配置され、外側チューブ3の近位端3Pより近位側に延在する。搬送装置1によって医療用管状体20を体内に搬送する際、医療用管状体20は径方向に対して内側チューブ4と外側チューブ3の間に配置される。内側チューブ4の内腔にはガイドワイヤが挿通される。ガイドワイヤを内側チューブ4の内腔に挿通し、ガイドワイヤに沿ってシャフト部2を移動させることで、シャフト部2の先端を病変部まで送達することができる。内側チューブ4の遠近方向の長さは、例えば200mm~3000mm程度であればよい。内側チューブ4の外径は、例えば0.3mm~3.0mm程度とすればよい。Theinner tube 4 is arranged in the lumen of theouter tube 3 and the lumen of the medicaltubular body 20, and extends proximally from theproximal end 3P of theouter tube 3. When the medicaltubular body 20 is transported into the body by thetransport device 1, the medicaltubular body 20 is arranged between theinner tube 4 and theouter tube 3 in the radial direction. A guide wire is inserted into the lumen of theinner tube 4. By inserting the guide wire into the lumen of theinner tube 4 and moving theshaft portion 2 along the guide wire, the tip of theshaft portion 2 can be delivered to the lesion portion. The length of theinner tube 4 in the perspective direction may be, for example, about 200 mm to 3000 mm. The outer diameter of theinner tube 4 may be, for example, about 0.3 mm to 3.0 mm.

 外側チューブ3の近位側には、外側チューブ3の近位端部を内腔に配置した保護チューブ5が設けられる。保護チューブ5の内腔には、外側チューブ3の近位端部と内側チューブ4が配置され、保護チューブ5は外側チューブ3の近位端3Pより近位側に延在する。外側チューブ3の近位端部とは、外側チューブ3の近位端3Pを含み、当該近位端から遠位側に所定の長さの部分を意味する。保護チューブ5の近位側には、使用者が搬送装置1を操作するためのコントローラー12が設けられる。保護チューブ5の遠近方向の長さは、例えば150mm~2200mm程度であればよい。保護チューブ5の外径は、例えば0.5mm~3.5mm程度とすればよい。On the proximal side of theouter tube 3, aprotective tube 5 in which the proximal end of theouter tube 3 is arranged in the lumen is provided. A proximal end of theouter tube 3 and aninner tube 4 are arranged in the lumen of theprotective tube 5, and theprotective tube 5 extends proximal to theproximal end 3P of theouter tube 3. The proximal end of theouter tube 3 includes theproximal end 3P of theouter tube 3 and means a portion of a predetermined length distal to the proximal end. Acontroller 12 for the user to operate thetransport device 1 is provided on the proximal side of theprotective tube 5. The length of theprotective tube 5 in the perspective direction may be, for example, about 150 mm to 2200 mm. The outer diameter of theprotective tube 5 may be, for example, about 0.5 mm to 3.5 mm.

 外側チューブ3の近位端部は、外側チューブ3が最も近位側に位置する状態および最も遠位側に位置する状態で、保護チューブ5の内腔に配置される。保護チューブ5の内腔に配置される外側チューブ3の近位端部の遠近方向の長さは、外側チューブ3が最も遠位側に位置する状態で、例えば1mm以上50mm以下であればよい。内側チューブ4は、外側チューブ3の近位端3Pより近位側に延在する部分のうち少なくとも一部が保護チューブ5の内腔に配置され、それよりも遠位側の部分、具体的には保護チューブ5の内腔に配置される外側チューブ3の近位端部と重なる部分も、保護チューブ5の内腔に配置される。The proximal end of theouter tube 3 is placed in the lumen of theprotective tube 5 with theouter tube 3 located most proximally and most distally. The perspective length of the proximal end of theouter tube 3 arranged in the lumen of theprotective tube 5 may be, for example, 1 mm or more and 50 mm or less in a state where theouter tube 3 is located on the most distal side. Theinner tube 4 has at least a part of the portion extending proximally from theproximal end 3P of theouter tube 3 arranged in the lumen of theprotective tube 5, and the portion distal to it, specifically. The portion overlapping the proximal end of theouter tube 3 which is arranged in the lumen of theprotective tube 5 is also arranged in the lumen of theprotective tube 5.

 保護チューブ5には、内側チューブ4の内腔にガイドワイヤを通すためのガイドワイヤポート6が設けられることが好ましい。ガイドワイヤポート6は、搬送装置1において、内側チューブ4の内腔に挿通されるガイドワイヤの近位側の入口となる。ガイドワイヤポート6の遠近方向の設置位置は、搬送装置1の型式、すなわちラピッドエクスチェンジ型かオーバーザワイヤ型かに応じて適宜設定すればよい。図面には、シャフト部の遠位端部から近位端部に至る途中までガイドワイヤを挿通するラピッドエクスチェンジ型の医療用管状体搬送装置の構成例が示されているが、本発明は、シャフト部の遠位端部から近位端部にわたってガイドワイヤを挿通するオーバーザワイヤ型の医療用管状体搬送装置にも適用できる。ガイドワイヤポート6は、外側チューブ3が最も近位側に位置する状態で、外側チューブ3の近位端3Pよりも近位側にあることが好ましい。It is preferable that theprotective tube 5 is provided with aguide wire port 6 for passing the guide wire through the cavity of theinner tube 4. Theguide wire port 6 serves as an inlet on the proximal side of the guide wire inserted into the lumen of theinner tube 4 in thetransport device 1. The installation position of theguide wire port 6 in the perspective direction may be appropriately set according to the model of thetransport device 1, that is, the rapid exchange type or the over-the-wire type. Although the drawing shows a configuration example of a rapid exchange type medical tubular body transport device in which a guide wire is inserted halfway from the distal end portion to the proximal end portion of the shaft portion, the present invention describes the shaft portion. It can also be applied to an over-the-wire type medical tubular body transport device in which a guide wire is inserted from the distal end to the proximal end of the portion. Theguide wire port 6 is preferably located proximal to theproximal end 3P of theouter tube 3 with theouter tube 3 located most proximally.

 外側チューブ3の近位端部には線状牽引部材7が接続される。線状牽引部材7は、外側チューブ3の近位端3Pより近位側に延在し、保護チューブ5の内腔に配置され、コントローラー12に直接または他の部材を介して接続される。コントローラー12を操作することにより、線状牽引部材7および外側チューブ3を遠近方向に移動させることができる。例えば、図2に示した状態から線状牽引部材7を近位側に牽引し、外側チューブ3を内側チューブ4および保護チューブ5に対して近位側に移動させることにより、図3に示すように医療用管状体20をシャフト部2の外側に露出させ、体内に留置することができる。また、医療用管状体20を露出させる途中に線状牽引部材7を遠位側に送り、外側チューブ3を内側チューブ4および保護チューブ5に対して遠位側に移動させて、医療用管状体20を再度外側チューブ3の内腔に収納し、医療用管状体20の留置場所の調整を行うことも可能である。牽引部材7を線状に形成することにより、保護チューブ5の外径を小さく形成することができる。なお、線状牽引部材7を近位側に牽引する操作により、内側チューブ4と保護チューブ5は近位側に移動しない。Alinear traction member 7 is connected to the proximal end of theouter tube 3. Thelinear traction member 7 extends proximally from theproximal end 3P of theouter tube 3 and is located in the lumen of theprotective tube 5 and is connected to thecontroller 12 directly or via other members. By operating thecontroller 12, thelinear traction member 7 and theouter tube 3 can be moved in the perspective direction. For example, as shown in FIG. 3, thelinear traction member 7 is towed proximally from the state shown in FIG. 2, and theouter tube 3 is moved proximally to theinner tube 4 and theprotective tube 5. The medicaltubular body 20 can be exposed to the outside of theshaft portion 2 and placed in the body. Further, thelinear traction member 7 is sent to the distal side while the medicaltubular body 20 is exposed, and theouter tube 3 is moved to the distal side with respect to theinner tube 4 and theprotective tube 5, so that the medicaltubular body 20 is exposed. It is also possible to re-store the 20 in the lumen of theouter tube 3 and adjust the placement location of the medicaltubular body 20. By forming thetraction member 7 in a linear shape, the outer diameter of theprotective tube 5 can be made small. Theinner tube 4 and theprotective tube 5 do not move to the proximal side due to the operation of pulling thelinear traction member 7 to the proximal side.

 線状牽引部材7の遠近方向の長さは、例えば150mm~2300mm程度であればよい。線状牽引部材7の外径は、例えば0.1mm~1.5mm程度とすればよい。これにより、線状牽引部材7の強度を確保しつつ、線状牽引部材7の外径を小さくして、保護チューブ5の外径を小さく形成することができる。なお、内側チューブ4の外径は線状牽引部材7の外径よりも大きいことが好ましい。内側チューブ4の外径は、例えば、線状牽引部材7の外径の1.5倍以上が好ましく、2倍以上がより好ましく、2.5倍以上がさらに好ましく、また10倍以下が好ましく、8倍以下がより好ましく、7倍以下がさらに好ましい。The length of thelinear traction member 7 in the perspective direction may be, for example, about 150 mm to 2300 mm. The outer diameter of thelinear traction member 7 may be, for example, about 0.1 mm to 1.5 mm. As a result, the outer diameter of thelinear traction member 7 can be reduced and the outer diameter of theprotective tube 5 can be reduced while ensuring the strength of thelinear traction member 7. The outer diameter of theinner tube 4 is preferably larger than the outer diameter of thelinear traction member 7. The outer diameter of theinner tube 4 is, for example, preferably 1.5 times or more, more preferably 2 times or more, further preferably 2.5 times or more, and preferably 10 times or less the outer diameter of thelinear traction member 7. 8 times or less is more preferable, and 7 times or less is further preferable.

 線状牽引部材7は、1本のみ設けられてもよく、複数本設けられてもよい。後者の場合、外側チューブ3の周方向の異なる位置に複数本設けられることが好ましい。なお、保護チューブ5の外径をより小さく形成する点からは、線状牽引部材7は1本のみ設けられることが好ましい。Only onelinear traction member 7 may be provided, or a plurality oflinear traction members 7 may be provided. In the latter case, it is preferable that a plurality ofouter tubes 3 are provided at different positions in the circumferential direction. From the viewpoint of forming the outer diameter of theprotective tube 5 to be smaller, it is preferable that only onelinear traction member 7 is provided.

 外側チューブ3の近位端部において、線状牽引部材7は外側チューブ3の内側面に接続してもよく、外側チューブ3の外側面に接続してもよく、外側チューブ3の内側面と外側面の間の周壁部に接続してもよい。また、外側チューブ3の近位端部を多層構造とし、その層間に線状牽引部材7の遠位端部を配置し、線状牽引部材7を外側チューブ3に接続してもよい。線状牽引部材7の外側チューブ3への接合手段は、接着剤による接着、溶着、嵌合、多層構造からなる外側チューブ3の層間圧着等、公知の接合手段を採用することができる。At the proximal end of theouter tube 3, thelinear traction member 7 may be connected to the inner surface of theouter tube 3, the outer surface of theouter tube 3, and the inner and outer surfaces of theouter tube 3. It may be connected to the peripheral wall portion between the sides. Further, the proximal end portion of theouter tube 3 may have a multilayer structure, the distal end portion of thelinear traction member 7 may be arranged between the layers, and thelinear traction member 7 may be connected to theouter tube 3. As the joining means of thelinear traction member 7 to theouter tube 3, known joining means such as adhesion by an adhesive, welding, fitting, and interlayer pressure bonding of theouter tube 3 having a multi-layer structure can be adopted.

 シャフト部2を構成する各部材は、樹脂、金属またはこれらの複合材料から構成することができる。またこれらの各材料は、生体適合性を有することが好ましい。樹脂材料としては、例えば、ポリエチレン、ポリプロピレン等のポリオレフィン系樹脂、ナイロン等のポリアミド系樹脂、ポリエチレンテレフタレート等のポリエステル系樹脂、PEEK等の芳香族ポリエーテルケトン系樹脂、ポリエーテルポリアミド系樹脂、ポリウレタン系樹脂、ポリイミド系樹脂、PTFE、PFA、ETFE等のフッ素系樹脂、ポリ塩化ビニル系樹脂、シリコーン樹脂等の合成樹脂が挙げられる。金属材料としては、SUS304、SUS316等のステンレス鋼、炭素鋼、白金、ニッケル、コバルト、クロム、チタン、タングステン、金、Ni-Ti合金、Co-Cr合金、およびこれらの組み合わせが挙げられる。Each member constituting theshaft portion 2 can be made of resin, metal, or a composite material thereof. Moreover, it is preferable that each of these materials has biocompatibility. Examples of the resin material include polyolefin resins such as polyethylene and polypropylene, polyamide resins such as nylon, polyester resins such as polyethylene terephthalate, aromatic polyether ketone resins such as PEEK, polyether polyamide resins, and polyurethane resins. Examples thereof include resins, polyimide resins, fluororesins such as PTFE, PFA and ETFE, synthetic resins such as polyvinyl chloride resins and silicone resins. Examples of the metal material include stainless steel such as SUS304 and SUS316, carbon steel, platinum, nickel, cobalt, chromium, titanium, tungsten, gold, Ni—Ti alloy, Co—Cr alloy, and combinations thereof.

 シャフト部2を構成する外側チューブ3、内側チューブ4、保護チューブ5は、チューブ状に形成されていれば、単層から構成されていてもよく、複数層から構成されていてもよい。これら各チューブは、遠近方向の一部と他部が異なる材料から構成されていてもよく、また遠近方向の一部が単層から構成されており、他部が複数層から構成されていてもよい。これら各チューブは、遠近方向の垂直断面の外縁形状および内縁形状が基本的に略円形であることが好ましい。Theouter tube 3,inner tube 4, andprotective tube 5 constituting theshaft portion 2 may be composed of a single layer or may be composed of a plurality of layers as long as they are formed in a tubular shape. In each of these tubes, a part in the perspective direction and another part may be made of different materials, or a part in the perspective direction may be made of a single layer and the other part may be made of a plurality of layers. Good. It is preferable that each of these tubes has a substantially circular outer edge shape and inner edge shape in a vertical cross section in the perspective direction.

 外側チューブ3、内側チューブ4、保護チューブ5が樹脂と金属の複合材料から構成される場合、当該複合材料としては、樹脂層中に金属線材が配置された構造や、複数の樹脂層の間に金属線材が配置された構造を有するものが挙げられる。金属線材は、例えば、一重または多重のらせん状に配されたり、編組層を形成するものであってもよい。各チューブがこのように構成されていれば、各チューブの強度、摺動性、耐キンク性を高めることができる。When theouter tube 3, theinner tube 4, and theprotective tube 5 are composed of a resin and metal composite material, the composite material includes a structure in which a metal wire is arranged in the resin layer or between a plurality of resin layers. An example has a structure in which a metal wire is arranged. The metal wire may be, for example, arranged in a single or multiple spirals or form a braided layer. If each tube is configured in this way, the strength, slidability, and kink resistance of each tube can be improved.

 外側チューブ3は、フッ素系樹脂からなる樹脂層を有することが好ましく、当該フッ素系樹脂としてはPTFEが好ましい。外側チューブ3がこのように構成されていることにより、摺動性を高めることができる。特に外側チューブ3の内側面がフッ素系樹脂からなる樹脂層から構成されていることが好ましく、これにより、外側チューブ3と医療用管状体20との摺動性を高めたり、外側チューブ3と内側チューブ4との摺動性を高めることができ、医療用管状体20の体内への留置が容易となる。Theouter tube 3 preferably has a resin layer made of a fluorine-based resin, and PTFE is preferable as the fluorine-based resin. With theouter tube 3 configured in this way, slidability can be improved. In particular, it is preferable that the inner surface of theouter tube 3 is composed of a resin layer made of a fluororesin, whereby the slidability between theouter tube 3 and the medicaltubular body 20 can be improved, or theouter tube 3 and the inner surface can be improved. The slidability with thetube 4 can be improved, and the medicaltubular body 20 can be easily placed in the body.

 外側チューブ3は、ポリイミド系樹脂からなる樹脂層を有することも好ましく、これにより外側チューブ3に剛性と可撓性の両方を付与することができる。外側チューブ3の強度を高める点からは、外側チューブ3に金属線材が配置されていることも好ましく、特に外側チューブ3が金属線材からなる編組層を有することが好ましい。例えば、外側チューブ3のうち保護チューブ5の内腔に配置される部分は、外側チューブ3を内側チューブ4および保護チューブ5に対して近位側に移動させる際に、保護チューブ5と内側チューブ4の間の空間に外側チューブ3が変形せずに当該空間の延在方向に沿って真っ直ぐに挿入されることが望ましい。すなわち、外側チューブ3が折れ曲がったり、内腔形状が変化したり、遠近方向に伸縮せずに、保護チューブ5と内側チューブ4の間の空間に外側チューブ3が挿入されることが好ましい。そのような観点から、外側チューブ3のうち少なくとも保護チューブ5の内腔に配置される部分は、ポリイミド系樹脂からなる樹脂層を有することが好ましく、さらに金属線材からなる編組層を有することが好ましい。外側チューブ3のうち保護チューブ5の内腔に配置される部分は、フッ素系樹脂からなる樹脂層を内層とし、ポリイミド系樹脂からなる樹脂層を外層とし、これらの内層と外層の間に金属線材(特にステンレス線材)からなる編組層が設けられることが好ましい。It is also preferable that theouter tube 3 has a resin layer made of a polyimide-based resin, whereby both rigidity and flexibility can be imparted to theouter tube 3. From the viewpoint of increasing the strength of theouter tube 3, it is preferable that the metal wire is arranged on theouter tube 3, and it is particularly preferable that theouter tube 3 has a braided layer made of the metal wire. For example, the portion of theouter tube 3 arranged in the lumen of theprotective tube 5 is theprotective tube 5 and theinner tube 4 when theouter tube 3 is moved proximal to theinner tube 4 and theprotective tube 5. It is desirable that theouter tube 3 is inserted straight into the space between the spaces along the extending direction of the space without being deformed. That is, it is preferable that theouter tube 3 is inserted into the space between theprotective tube 5 and theinner tube 4 without bending theouter tube 3, changing the shape of the lumen, or expanding or contracting in the perspective direction. From such a viewpoint, it is preferable that at least the portion of theouter tube 3 arranged in the inner cavity of theprotective tube 5 has a resin layer made of a polyimide resin, and further preferably has a braided layer made of a metal wire rod. .. The portion of theouter tube 3 arranged in the inner cavity of theprotective tube 5 has a resin layer made of a fluororesin as an inner layer and a resin layer made of a polyimide resin as an outer layer, and a metal wire rod between the inner layer and the outer layer. It is preferable that a braided layer made of (particularly stainless wire) is provided.

 内側チューブ4は、ポリイミド系樹脂からなる樹脂層を有することが好ましい。これにより、内側チューブ4の内腔にガイドワイヤを挿通し、ガイドワイヤに沿ってシャフト部2を体内へ送り込みやすくなる。また、内側チューブ4がポリイミド系樹脂からなる樹脂層を有することにより、内側チューブ4の遠近方向の引張強度の向上が向上し、内側チューブ4が破断しにくくなるととともに、医療用管状体20の展開に必要な軸圧縮抵抗力が向上し、医療用管状体20を安定して展開しやすくなる。Theinner tube 4 preferably has a resin layer made of a polyimide resin. As a result, the guide wire is inserted into the inner cavity of theinner tube 4, and theshaft portion 2 can be easily sent into the body along the guide wire. Further, since theinner tube 4 has a resin layer made of a polyimide resin, the improvement of the tensile strength of theinner tube 4 in the perspective direction is improved, theinner tube 4 is less likely to break, and the medicaltubular body 20 is developed. The axial compression resistance required for the medicaltubular body 20 is improved, and the medicaltubular body 20 can be easily deployed stably.

 内側チューブ4はさらに、金属線材(特にステンレス線材)からなる編組層を有していてもよい。このように内側チューブ4が構成されることにより、内側チューブ4の強度、摺動性、耐キンク性を高めることができる。金属線材からなる編組層は内側チューブ4の遠位側の部分のみに設けられてもよく、これによりシャフト部2をガイドワイヤに沿って体内に送り込む際のプッシャビリティを高めることができる。また、内側チューブ4が金属線材からなる編組層を有することにより、内側チューブ4の遠近方向の引張強度や軸圧縮抵抗力が向上し、医療用管状体20の展開操作が安定化し、より安全に医療用管状体20を展開できるようになる。Theinner tube 4 may further have a braided layer made of a metal wire (particularly a stainless wire). By configuring theinner tube 4 in this way, the strength, slidability, and kink resistance of theinner tube 4 can be improved. The braided layer made of the metal wire may be provided only on the distal side portion of theinner tube 4, whereby the pushability when theshaft portion 2 is sent into the body along the guide wire can be enhanced. Further, since theinner tube 4 has a braided layer made of a metal wire, the tensile strength and the axial compression resistance of theinner tube 4 in the perspective direction are improved, and the deployment operation of the medicaltubular body 20 is stabilized, which makes it safer. The medicaltubular body 20 can be deployed.

 保護チューブ5は、フッ素系樹脂からなる樹脂層を有することが好ましく、当該フッ素系樹脂としてはPTFEが好ましい。これにより、保護チューブ5の摺動性を高めることができる。特に保護チューブ5の内腔に外側チューブ3が配置される部分において少なくとも、保護チューブ5の内側面がフッ素系樹脂からなる樹脂層から構成されていることが好ましく、これにより保護チューブ5と外側チューブ3との摺動性が高まり、医療用管状体20の体内への留置が容易となる。Theprotective tube 5 preferably has a resin layer made of a fluorine-based resin, and PTFE is preferable as the fluorine-based resin. As a result, the slidability of theprotective tube 5 can be improved. In particular, in the portion where theouter tube 3 is arranged in the inner cavity of theprotective tube 5, it is preferable that at least the inner surface of theprotective tube 5 is composed of a resin layer made of a fluororesin, whereby theprotective tube 5 and the outer tube are formed. The slidability with 3 is improved, and the medicaltubular body 20 can be easily placed in the body.

 保護チューブ5は、ポリイミド系樹脂やポリアミド系樹脂等からなる樹脂層を有していてもよく、これにより保護チューブ5の剛性を高め、保護チューブ5に剛性と可撓性の両方を付与することができる。その結果、保護チューブ5が、体腔内の形状に沿って屈曲する可撓性と、病変部まで確実に到達する剛性の両方をバランス良く兼ね備えるものとすることができる。そのため、シャフト部2を内視鏡の鉗子チャンネルを通して体内に挿入する際に、シャフト部2を、鉗子チャンネル内を体腔の形状に沿って押し込むことが容易になる。Theprotective tube 5 may have a resin layer made of a polyimide resin, a polyamide resin, or the like, thereby increasing the rigidity of theprotective tube 5 and imparting both rigidity and flexibility to theprotective tube 5. Can be done. As a result, theprotective tube 5 can have both the flexibility of bending along the shape in the body cavity and the rigidity of surely reaching the lesion portion in a well-balanced manner. Therefore, when theshaft portion 2 is inserted into the body through the forceps channel of the endoscope, theshaft portion 2 can be easily pushed into the forceps channel along the shape of the body cavity.

 保護チューブ5は、金属線材(特にステンレス線材)からなる編組層を有していてもよく、これにより、保護チューブ5の強度、摺動性、耐キンク性を高めることができる。例えば、保護チューブ5が樹脂層と金属線材からなる編組層を有する場合は、屈曲時でも保護チューブ5の内腔の形状を維持しやすくなるため、保護チューブ5の内腔に配置される内側チューブ4等のキンクを防止することができ、ガイドワイヤに沿ってシャフト部2を遠近方向に移動させることが容易になる。また、保護チューブ5が金属線材からなる編組層を有することにより、保護チューブ5の内腔形状が維持されやすくなり、外側チューブ3を保護チューブ5内で遠近方向に移動させる際の抵抗を減らすことができる。Theprotective tube 5 may have a braided layer made of a metal wire (particularly a stainless steel wire), whereby the strength, slidability, and kink resistance of theprotective tube 5 can be enhanced. For example, when theprotective tube 5 has a braided layer made of a resin layer and a metal wire, the inner tube arranged in the inner cavity of theprotective tube 5 can easily maintain the shape of the inner cavity of theprotective tube 5 even when bent. Kink of 4 or the like can be prevented, and theshaft portion 2 can be easily moved in the perspective direction along the guide wire. Further, since theprotective tube 5 has a braided layer made of a metal wire, the cavity shape of theprotective tube 5 can be easily maintained, and the resistance when theouter tube 3 is moved in theprotective tube 5 in the perspective direction is reduced. Can be done.

 線状牽引部材7は、金属線材や合成樹脂から形成された糸条を用いることができる。線状牽引部材7は、複数の材料からなる複合体であってもよく、例えば金属と合成樹脂の複合体であってもよい。線状牽引部材7は金属線材から構成されることが好ましく、ステンレス線材から構成されることがより好ましい。このように線状牽引部材7が構成されることにより、線状牽引部材7の強度が高まり、線状牽引部材7を繰り返し遠近方向へ移動させても線状牽引部材7が破損しにくくなる。線状牽引部材7はまた、金属線材に樹脂がコーティングされた構成であってもよい。特に線状牽引部材7は、金属線材の表面にフッ素系樹脂、特にPTFEがコーティングされて構成されていることが好ましく、これにより線状牽引部材7の摺動性を高めることができ、医療用管状体20の展開操作が容易になる。線状牽引部材7は、遠近方向に対する垂直断面形状が略円形であることが好ましい。As thelinear traction member 7, a thread formed of a metal wire or a synthetic resin can be used. Thelinear traction member 7 may be a composite made of a plurality of materials, for example, a composite of a metal and a synthetic resin. Thelinear traction member 7 is preferably made of a metal wire, more preferably made of a stainless steel wire. By forming thelinear traction member 7 in this way, the strength of thelinear traction member 7 is increased, and even if thelinear traction member 7 is repeatedly moved in the perspective direction, thelinear traction member 7 is less likely to be damaged. Thelinear traction member 7 may also have a structure in which a metal wire is coated with a resin. In particular, thelinear traction member 7 is preferably configured by coating the surface of a metal wire with a fluororesin, particularly PTFE, which can improve the slidability of thelinear traction member 7 for medical use. The operation of deploying thetubular body 20 becomes easy. Thelinear traction member 7 preferably has a substantially circular vertical cross-sectional shape with respect to the perspective direction.

 搬送装置1は、上記のようにシャフト部2が構成されることにより、線状牽引部材7を牽引して外側チューブ3を近位側へ移動させて、医療用管状体20を体腔内の所望の位置に精度良く留置することが容易になる。具体的には、外側チューブ3を内側チューブ4と保護チューブ5に対して近位側に移動させたときに、外側チューブ3を保護チューブ5の内腔に収納することができるため、外側チューブ3を遠近方向に移動させる際に、外側チューブ3が内視鏡の鉗子チャンネルや鉗子口と接触することによる摩擦抵抗の発生を低減することができる。そのため、外側チューブ3を遠近方向に移動させる際の操作荷重が低減され、医療用管状体20を安定して展開できる。また、医療用管状体20を展開する際に、保護チューブ5を固定して外側チューブ3のみを線状牽引部材7を介して近位側に牽引することで、シャフト部2の全体が近位側に移動することを抑制でき、医療用管状体20を所望の位置に精度良く留置することができる。When theshaft portion 2 is configured as described above, thetransport device 1 pulls thelinear traction member 7 to move theouter tube 3 to the proximal side, and the medicaltubular body 20 is desired in the body cavity. It becomes easy to place it in the position of. Specifically, when theouter tube 3 is moved proximal to theinner tube 4 and theprotective tube 5, theouter tube 3 can be housed in the lumen of theprotective tube 5, so that theouter tube 3 can be stored. It is possible to reduce the generation of frictional resistance due to theouter tube 3 coming into contact with the forceps channel or the forceps opening of the endoscope when theouter tube 3 is moved in the perspective direction. Therefore, the operating load when moving theouter tube 3 in the perspective direction is reduced, and the medicaltubular body 20 can be stably deployed. Further, when the medicaltubular body 20 is deployed, theprotective tube 5 is fixed and only theouter tube 3 is pulled to the proximal side via thelinear traction member 7, so that theentire shaft portion 2 is proximal. The movement to the side can be suppressed, and the medicaltubular body 20 can be accurately placed at a desired position.

 ところで、上記のように構成された搬送装置1では、シャフト部2を内視鏡の鉗子チャンネルに挿入して医療用管状体20を病変部まで搬送する際、シャフト部2が体腔内を屈曲しながら進行することにより、線状牽引部材7が内側チューブ4に巻き付くおそれがある。線状牽引部材7が内側チューブ4に巻き付いてしまった場合、シャフト部2の先端を病変部まで送達した後、線状牽引部材7を近位側に引いて医療用管状体20を展開させようとすると、線状牽引部材7を近位側にスムーズに引くことができなくなる。また、線状牽引部材7が内側チューブ4に巻き付かない場合でも、シャフト部2が屈曲した部分では、線状牽引部材7を近位側に引くと、当該屈曲部分で線状牽引部材7がより直線的に延びるようになるため、内側チューブ4と線状牽引部材7の間および保護チューブ5と線状牽引部材7の間に屈曲差が生じ、線状牽引部材7が保護チューブ5や内側チューブ4に強く接触しやすくなる。そのため、線状牽引部材7を近位側に引くほど、線状牽引部材7の摩擦抵抗が大きくなりやすくなる。また、線状牽引部材7は、線状に形成されることにより、シャフト部2の外径を小さくできるという利点があるものの、線状牽引部材7を保護チューブ5の内腔に単に内側チューブ4と並べて配置するだけでは、手元側からの操作に対するトルク伝達性に劣るという問題もある。By the way, in thetransport device 1 configured as described above, when theshaft portion 2 is inserted into the forceps channel of the endoscope and the medicaltubular body 20 is transported to the lesion portion, theshaft portion 2 bends in the body cavity. There is a possibility that thelinear traction member 7 may be wound around theinner tube 4 by proceeding while proceeding. When thelinear traction member 7 is wrapped around theinner tube 4, after delivering the tip of theshaft portion 2 to the lesion portion, pull thelinear traction member 7 to the proximal side to deploy the medicaltubular body 20. Then, thelinear traction member 7 cannot be smoothly pulled toward the proximal side. Further, even when thelinear traction member 7 is not wound around theinner tube 4, when thelinear traction member 7 is pulled to the proximal side at the portion where theshaft portion 2 is bent, thelinear traction member 7 is pulled at the bent portion. Since it extends more linearly, a bending difference occurs between theinner tube 4 and thelinear traction member 7 and between theprotective tube 5 and thelinear traction member 7, and thelinear traction member 7 becomes theprotective tube 5 and the inner side. It becomes easy to make strong contact with thetube 4. Therefore, as thelinear traction member 7 is pulled to the proximal side, the frictional resistance of thelinear traction member 7 tends to increase. Further, although thelinear traction member 7 has an advantage that the outer diameter of theshaft portion 2 can be reduced by being formed linearly, thelinear traction member 7 is simply placed in the inner cavity of theprotective tube 5 by theinner tube 4 There is also a problem that the torque transmission property to the operation from the hand side is inferior just by arranging them side by side.

 そこで搬送装置1では、保護チューブ5の内腔に、線状牽引部材7と内側チューブ4とを拘束する保持部材9を設けている。保持部材9は、図4に示すように、線状牽引部材7に対して遠近方向に移動可能に形成されているか、図5に示すように、保持部材9の遠近方向の長さが縮小可能であるように形成されている。図4および図5は、外側チューブ3の近位端部とその近傍部分の遠近方向に沿った一部断面図を表しており、保持部材9は側面から見た状態を示している。図4(a)および図5(a)は、外側チューブ3が最も遠位側に位置する状態が示されており、図4(b)および図5(b)は、線状牽引部材7を近位側に牽引して、外側チューブ3を近位側に移動させた状態が示されている。Therefore, in thetransport device 1, a holdingmember 9 for restraining thelinear traction member 7 and theinner tube 4 is provided in the cavity of theprotective tube 5. The holdingmember 9 is formed so as to be movable in the perspective direction with respect to thelinear traction member 7 as shown in FIG. 4, or the length of the holdingmember 9 in the perspective direction can be reduced as shown in FIG. Is formed to be. 4 and 5 show a partial cross-sectional view of the proximal end of theouter tube 3 and its vicinity along the perspective direction, and the holdingmember 9 shows a state seen from the side surface. 4 (a) and 5 (a) show a state in which theouter tube 3 is located on the most distal side, and FIGS. 4 (b) and 5 (b) show thelinear traction member 7. A state in which theouter tube 3 is moved to the proximal side by being pulled to the proximal side is shown.

 搬送装置1は、上記のように線状牽引部材7と内側チューブ4とを拘束する保持部材9が設けられることにより、シャフト部2を内視鏡の鉗子チャンネルに挿入して医療用管状体20を病変部まで搬送する際、線状牽引部材7が内側チューブ4に巻き付くことを抑えることができ、また線状牽引部材7が内側チューブ4に巻き付きにくいため、手元側からのトルク伝達性を高めることができる。医療用管状体20を展開させるために線状牽引部材7を近位側に引く際には、保持部材9によって線状牽引部材7と内側チューブ4との屈曲差が広がることを抑えることができるため、線状牽引部材7を近位側に好適に牽引することが可能となる。また、保持部材9は、線状牽引部材7に対して遠近方向に移動可能、または、遠近方向に縮小可能に形成されているため、線状牽引部材7を内側チューブ4に対して近位側に移動させることが可能となり、線状牽引部材7を牽引して外側チューブ3を近位側に移動させたときに、保持部材9を、外側チューブ3の近位端3Pより近位側の空間にコンパクトに収納することができる。Thetransport device 1 is provided with a holdingmember 9 that restrains thelinear traction member 7 and theinner tube 4 as described above, so that theshaft portion 2 is inserted into the forceps channel of the endoscope and the medicaltubular body 20 is provided. Thelinear traction member 7 can be prevented from wrapping around theinner tube 4 when thelinear traction member 7 is transported to the lesion portion, and thelinear traction member 7 is less likely to wrap around theinner tube 4, so that torque transmission from the hand side can be improved. Can be enhanced. When thelinear traction member 7 is pulled to the proximal side in order to deploy the medicaltubular body 20, it is possible to prevent the holdingmember 9 from widening the bending difference between thelinear traction member 7 and theinner tube 4. Therefore, thelinear traction member 7 can be preferably towed to the proximal side. Further, since the holdingmember 9 is formed so as to be movable in the perspective direction or contractible in the perspective direction with respect to thelinear traction member 7, thelinear traction member 7 is located proximal to theinner tube 4. When thelinear traction member 7 is towed to move theouter tube 3 to the proximal side, the holdingmember 9 is moved to the space proximal to theproximal end 3P of theouter tube 3. Can be stored compactly.

 保持部材9は、径方向に対して線状牽引部材7と内側チューブ4が互いに動ける範囲を制限するように、線状牽引部材7と内側チューブ4とを拘束する。保持部材9は、例えば、近位側または遠位側から見て、線状牽引部材7と内側チューブ4の両方が通る開口を有するように形成されたり、線状牽引部材7が通る開口と内側チューブ4が通る開口をそれぞれ有するように形成されればよい。これらの開口は、径方向に対して線状牽引部材7や内側チューブ4の動ける範囲が制限される限り、開口の縁の一部が途切れていてもよい。図4および図5では、保持部材9は、近位側または遠位側から見て、単環状に形成されており、単環の開口部分に線状牽引部材7と内側チューブ4が挿通されている。The holdingmember 9 restrains thelinear traction member 7 and theinner tube 4 so as to limit the range in which thelinear traction member 7 and theinner tube 4 can move with each other in the radial direction. The holdingmember 9 is formed so as to have an opening through which both thelinear traction member 7 and theinner tube 4 pass, or the opening and the inner side through which thelinear traction member 7 passes, when viewed from the proximal side or the distal side, for example. It may be formed so as to have an opening through which thetube 4 passes. As long as the movable range of thelinear traction member 7 and theinner tube 4 is limited in the radial direction, a part of the edge of the opening may be interrupted. In FIGS. 4 and 5, the holdingmember 9 is formed in a monocyclic shape when viewed from the proximal side or the distal side, and thelinear traction member 7 and theinner tube 4 are inserted through the opening portion of the monocyclic ring. There is.

 保持部材9は、線状牽引部材7が内側チューブ4に対して遠近方向に移動することができるように、線状牽引部材7と内側チューブ4を拘束する。図4では、保持部材9が環状に形成され、保持部材9が線状牽引部材7と内側チューブ4の両方に対して非固定とされている。これにより、保持部材9が線状牽引部材7と内側チューブ4の両方に対して遠近方向に移動可能となっている。なお、保持部材9は、少なくとも線状牽引部材7に対して非固定とされていればよく、これにより線状牽引部材7を近位側に牽引することが可能となるとともに、線状牽引部材7が内側チューブ4に対して遠近方向に対して移動可能となる。The holdingmember 9 restrains thelinear traction member 7 and theinner tube 4 so that thelinear traction member 7 can move in the perspective direction with respect to theinner tube 4. In FIG. 4, the holdingmember 9 is formed in an annular shape, and the holdingmember 9 is not fixed to both thelinear traction member 7 and theinner tube 4. As a result, the holdingmember 9 can move in the perspective direction with respect to both thelinear traction member 7 and theinner tube 4. The holdingmember 9 may be at least non-fixed to thelinear traction member 7, which enables thelinear traction member 7 to be towed proximally and thelinear traction member 7. 7 can move in the perspective direction with respect to theinner tube 4.

 図5では、保持部材9が遠近方向に縮小可能となっているが、この場合は、保持部材9が、線状牽引部材7と内側チューブ4に固定されていてもよく、線状牽引部材7に固定され内側チューブ4に対して非固定となっていてもよく、内側チューブ4に固定され線状牽引部材7に対して非固定となっていてもよく、線状牽引部材7と内側チューブ4の両方に対して非固定となっていてもよい。保持部材9が線状牽引部材7に固定される場合、保持部材9の遠位端部が線状牽引部材7に固定されることが好ましい。保持部材9が内側チューブ4に固定される場合、保持部材9の近位端部が内側チューブ4に固定されることが好ましい。In FIG. 5, the holdingmember 9 can be reduced in the perspective direction. In this case, the holdingmember 9 may be fixed to thelinear traction member 7 and theinner tube 4, and thelinear traction member 7 may be fixed. It may be fixed to theinner tube 4 and not fixed to theinner tube 4, or it may be fixed to theinner tube 4 and not fixed to thelinear traction member 7, and thelinear traction member 7 and theinner tube 4 may be fixed. It may be non-fixed to both of. When the holdingmember 9 is fixed to thelinear traction member 7, it is preferable that the distal end portion of the holdingmember 9 is fixed to thelinear traction member 7. When the holdingmember 9 is fixed to theinner tube 4, it is preferable that the proximal end of the holdingmember 9 is fixed to theinner tube 4.

 図5では、保持部材9がコイル状に形成され、線状牽引部材7を近位側に引いたときに、保持部材9に遠近方向に縮む力が加わることにより、保持部材9が遠近方向に対して縮小可能となっている。保持部材9は、次のいずれかの作用の組み合わせにより、遠近方向に縮むことができる:(i)保持部材9が外側チューブ3の近位端3Pと接し、外側チューブ3によって近位側へ押される;(ii)保持部材9が後述する牽引部材収納チューブ8の遠位端8Dと接し、牽引部材収納チューブ8によって保持部材9の近位端の位置が固定される;(iii)保持部材9の遠位端部が線状牽引部材7に固定され、線状牽引部材7によって近位側に引っ張られる;(iv)保持部材9の近位端部が内側チューブ4に固定されて、内側チューブ4によって保持部材9の近位端の位置が固定される。これらいずれの場合も、線状牽引部材7が内側チューブ4に対して遠近方向に対して移動可能となる。なお、遠近方向に縮小可能な保持部材9は、コイル状に形成されたものに限定されず、例えば編組状、蛇腹状等に形成されたものであってもよい。In FIG. 5, the holdingmember 9 is formed in a coil shape, and when thelinear traction member 7 is pulled to the proximal side, a force that contracts in the perspective direction is applied to the holdingmember 9, so that the holdingmember 9 moves in the perspective direction. On the other hand, it can be reduced. The holdingmember 9 can be contracted in the perspective direction by a combination of any of the following actions: (i) The holdingmember 9 is in contact with theproximal end 3P of theouter tube 3 and is pushed to the proximal side by theouter tube 3. (Ii) The holdingmember 9 is in contact with thedistal end 8D of the tractionmember storage tube 8 described later, and the position of the proximal end of the holdingmember 9 is fixed by the tractionmember storage tube 8; (iii) the holdingmember 9 The distal end of is fixed to thelinear traction member 7 and pulled proximally by thelinear traction member 7; (iv) the proximal end of the holdingmember 9 is fixed to theinner tube 4 and the inner tube The position of the proximal end of the holdingmember 9 is fixed by 4. In any of these cases, thelinear traction member 7 can move in the perspective direction with respect to theinner tube 4. The holdingmember 9 that can be reduced in the perspective direction is not limited to the one formed in a coil shape, and may be formed in a braided shape, a bellows shape, or the like, for example.

 保持部材9は、樹脂、金属またはこれらの複合材料から構成することができる。これらの各材料の具体例は、上記のシャフト部2の構成材料の説明が参照される。The holdingmember 9 can be made of resin, metal or a composite material thereof. For specific examples of each of these materials, the above description of the constituent materials of theshaft portion 2 is referred to.

 保持部材9は、例えばエラストマー樹脂からなる樹脂層を有することが好ましい。エラストマー樹脂としては、ポリウレタン系樹脂、ポリエステル系樹脂、ポリアミド系樹脂等が好ましく挙げられ、特にポリアミド系樹脂が好ましい。これにより、保持部材9が弾性変形可能となり、線状牽引部材7の牽引操作を行わない状態で、保持部材9を線状牽引部材7および内側チューブ4の所定の位置に保持することが容易になる。そのため、シャフト部2を内視鏡の鉗子チャンネルに挿入して医療用管状体20を病変部に搬送する際、線状牽引部材7と内側チューブ4に対して保持部材9が初期の位置に維持されやすくなり、保持部材9を設けることの効果が好適に発揮されやすくなる。The holdingmember 9 preferably has a resin layer made of, for example, an elastomer resin. Examples of the elastomer resin include polyurethane-based resins, polyester-based resins, and polyamide-based resins, and polyamide-based resins are particularly preferable. As a result, the holdingmember 9 can be elastically deformed, and it is easy to hold the holdingmember 9 at a predetermined position of thelinear traction member 7 and theinner tube 4 without pulling thelinear traction member 7. Become. Therefore, when theshaft portion 2 is inserted into the forceps channel of the endoscope and the medicaltubular body 20 is conveyed to the lesion portion, the holdingmember 9 is maintained at the initial position with respect to thelinear traction member 7 and theinner tube 4. The effect of providing the holdingmember 9 is likely to be suitably exhibited.

 保持部材9はまた、摺動性の高い樹脂層を有することも好ましく、このような樹脂としては、ポリオレフィン系樹脂やフッ素系樹脂が好ましく挙げられ、ポリオレフィン系樹脂がより好ましい。保持部材9がこのような樹脂層を有していれば、線状牽引部材7を内側チューブ4に対して近位側に引く際、線状牽引部材7や内側チューブ4と保持部材9との間の摩擦抵抗が低減し、線状牽引部材7の牽引操作が容易になる。The holdingmember 9 also preferably has a highly slidable resin layer, and examples of such a resin are preferably polyolefin-based resins and fluorine-based resins, with polyolefin-based resins being more preferred. If the holdingmember 9 has such a resin layer, when thelinear traction member 7 is pulled proximal to theinner tube 4, thelinear traction member 7 or theinner tube 4 and the holdingmember 9 are held together. The frictional resistance between them is reduced, and the traction operation of thelinear traction member 7 becomes easy.

 保持部材9は、エラストマー樹脂層と高摺動性樹脂層を有することが好ましく、エラストマー樹脂層が高摺動性樹脂層で挟まれた複層構造を有することがより好ましい。保持部材9は、例えば、ポリアミド系樹脂からなる樹脂層がポリオレフィン系樹脂からなる樹脂層で挟まれた複層構造を有することが好ましい。The holdingmember 9 preferably has an elastomer resin layer and a highly slidable resin layer, and more preferably has a multi-layer structure in which the elastomer resin layer is sandwiched between the highly slidable resin layers. The holdingmember 9 preferably has, for example, a multi-layer structure in which a resin layer made of a polyamide resin is sandwiched between resin layers made of a polyolefin resin.

 保持部材9は、外側チューブ3の近位端3Pより近位側に設けられ、内側チューブ4および線状牽引部材7と直接接触可能に設けられることが好ましい。保持部材9はまた、後述する牽引部材収納チューブ8の遠位端8Dよりも遠位側に設けられることが好ましい。It is preferable that the holdingmember 9 is provided on the proximal side of theproximal end 3P of theouter tube 3 so as to be in direct contact with theinner tube 4 and thelinear traction member 7. The holdingmember 9 is also preferably provided on the distal side of thedistal end 8D of the tractionmember storage tube 8, which will be described later.

 保持部材9は、1つのみ設けられてもよく、複数設けられてもよい。なお、線状牽引部材7の内側チューブ4への巻き付きを防止し、線状牽引部材7を近位側に引く際の線状牽引部材7と内側チューブ4との屈曲差が広がることを抑える観点からは、保持部材9は、線状牽引部材7の遠近方向の広い範囲に設けられることが好ましいが、この場合、線状牽引部材7を近位側に引く際の抵抗が増大するおそれがある。従って、そのような観点から、保持部材9は複数設けられることが好ましい。詳細には、保持部材9は、遠近方向に離間して複数設けられることが好ましい。このように保持部材9を設けることにより、保持部材9によって、線状牽引部材7の内側チューブ4への巻き付きを防止したり、線状牽引部材7と内側チューブ4との屈曲差が広がることを抑えつつ、保持部材9と線状牽引部材7との接触抵抗の増大を抑えることができる。特に、図4に示すように、保持部材9が遠近方向に縮小しないものである場合は、保持部材9をこのように複数設けることが好ましい。Only one holdingmember 9 may be provided, or a plurality of holdingmembers 9 may be provided. From the viewpoint of preventing thelinear traction member 7 from wrapping around theinner tube 4 and suppressing a widening difference in bending between thelinear traction member 7 and theinner tube 4 when thelinear traction member 7 is pulled to the proximal side. Therefore, it is preferable that the holdingmember 9 is provided in a wide range in the perspective direction of thelinear traction member 7, but in this case, the resistance when thelinear traction member 7 is pulled to the proximal side may increase. .. Therefore, from such a viewpoint, it is preferable to provide a plurality of holdingmembers 9. Specifically, it is preferable that a plurality of holdingmembers 9 are provided apart from each other in the perspective direction. By providing the holdingmember 9 in this way, the holdingmember 9 can prevent thelinear traction member 7 from being wound around theinner tube 4, and the bending difference between thelinear traction member 7 and theinner tube 4 can be widened. While suppressing it, it is possible to suppress an increase in contact resistance between the holdingmember 9 and thelinear traction member 7. In particular, as shown in FIG. 4, when the holdingmember 9 does not shrink in the perspective direction, it is preferable to provide a plurality of holdingmembers 9 in this way.

 保持部材9を複数設ける場合、保持部材9の遠近方向の離間間隔は10mm以上50mm以下であることが好ましい。具体的には、搬送装置1の使用前やシャフト部2を内視鏡の鉗子チャンネルに挿入する前において、複数の保持部材9がこのような間隔で配置されていることが好ましい。複数の保持部材9の遠近方向の離間間隔を50mm以下とすることにより、シャフト部2を内視鏡の鉗子チャンネルに挿入して進行させる際に、線状牽引部材7の内側チューブ4への巻き付きを防止しやすくなり、また線状牽引部材7を近位側に引く際に、線状牽引部材7と内側チューブ4との屈曲差が広がることを抑えやすくなる。一方、複数の保持部材9の遠近方向の離間間隔を10mm以上とすることにより、線状牽引部材7を近位側に引く際に、保持部材9と線状牽引部材7との接触抵抗の増大を抑えることができる。複数の保持部材9の遠近方向の離間間隔は、15mm以上がより好ましく、20mm以上がさらに好ましく、また45mm以下がより好ましく、40mm以下がさらに好ましい。When a plurality of holdingmembers 9 are provided, the distance between the holdingmembers 9 in the perspective direction is preferably 10 mm or more and 50 mm or less. Specifically, it is preferable that the plurality of holdingmembers 9 are arranged at such intervals before thetransfer device 1 is used or before theshaft portion 2 is inserted into the forceps channel of the endoscope. By setting the distance between the plurality of holdingmembers 9 in the perspective direction to 50 mm or less, thelinear traction member 7 is wound around theinner tube 4 when theshaft portion 2 is inserted into the forceps channel of the endoscope and advanced. In addition, when thelinear traction member 7 is pulled to the proximal side, it becomes easy to suppress a widening of the bending difference between thelinear traction member 7 and theinner tube 4. On the other hand, by setting the distance between the plurality of holdingmembers 9 in the perspective direction to 10 mm or more, the contact resistance between the holdingmember 9 and thelinear traction member 7 is increased when thelinear traction member 7 is pulled to the proximal side. Can be suppressed. The distance between the plurality of holdingmembers 9 in the perspective direction is more preferably 15 mm or more, further preferably 20 mm or more, further preferably 45 mm or less, still more preferably 40 mm or less.

 保持部材9の遠近方向の長さは1mm以上10mm以下であることが好ましい。特に、図4に示すように、保持部材9が遠近方向に縮小しないものである場合は、保持部材9をこのような大きさで形成することが好ましい。保持部材9の遠近方向の大きさを1mm以上とすることで、保持部材9の強度を確保しやすくなり、保持部材9の遠近方向の大きさを10mm以下とすることで、線状牽引部材7を近位側に引く際の抵抗を抑えることができる。保持部材9の遠近方向の長さは、2mm以上がより好ましく、3mm以上がさらに好ましく、また8mm以下がより好ましく、7mm以下がさらに好ましい。The length of the holdingmember 9 in the perspective direction is preferably 1 mm or more and 10 mm or less. In particular, as shown in FIG. 4, when the holdingmember 9 does not shrink in the perspective direction, it is preferable to form the holdingmember 9 in such a size. By setting the size of the holdingmember 9 in the perspective direction to 1 mm or more, it becomes easy to secure the strength of the holdingmember 9, and by setting the size of the holdingmember 9 in the perspective direction to 10 mm or less, thelinear traction member 7 The resistance when pulling to the proximal side can be suppressed. The length of the holdingmember 9 in the perspective direction is more preferably 2 mm or more, further preferably 3 mm or more, further preferably 8 mm or less, still more preferably 7 mm or less.

 保持部材9を複数設ける場合は、複数の保持部材9を遠近方向に配置するピッチが、内側チューブ4の外径の5倍以上100倍以下となることも好ましい。具体的には、搬送装置1の使用前やシャフト部2を内視鏡の鉗子チャンネルに挿入する前において、複数の保持部材9がこのようなピッチで配置されていることが好ましい。これにより、シャフト部2を内視鏡の鉗子チャンネルに挿入して進行させる際に、線状牽引部材7の内側チューブ4への巻き付きを防止しやすくなり、手元側からのトルク伝達性を高めることができる。複数の保持部材9の遠近方向の配置ピッチは、内側チューブ4の外径の10倍以上であることがより好ましく、20倍以上がさらに好ましく、また85倍以下がより好ましく、50倍以下がさらに好ましい。When a plurality of holdingmembers 9 are provided, it is also preferable that the pitch at which the plurality of holdingmembers 9 are arranged in the perspective direction is 5 times or more and 100 times or less the outer diameter of theinner tube 4. Specifically, it is preferable that the plurality of holdingmembers 9 are arranged at such a pitch before thetransfer device 1 is used or before theshaft portion 2 is inserted into the forceps channel of the endoscope. As a result, when theshaft portion 2 is inserted into the forceps channel of the endoscope and advanced, it becomes easy to prevent thelinear traction member 7 from wrapping around theinner tube 4, and the torque transmission from the hand side is enhanced. Can be done. The arrangement pitch of the plurality of holdingmembers 9 in the perspective direction is more preferably 10 times or more, further preferably 20 times or more, still more preferably 85 times or less, and further preferably 50 times or less the outer diameter of theinner tube 4. preferable.

 図5に示すように遠近方向に縮小可能な保持部材9の場合は、保持部材9は1つのみ設けてもよく、複数設けてもよい。保持部材9を複数設ける場合は、上記に説明したように、複数の保持部材9の遠近方向の離間間隔は10mm以上50mm以下とすることが好ましいが、当該離間間隔は10mm未満であってもよい。遠近方向に縮小可能な保持部材9の遠近方向の長さは、上記に説明したように1mm以上10mm以下であってもよいが、遠近方向の長さが10mmを超えるものであってもよい。As shown in FIG. 5, in the case of the holdingmember 9 that can be reduced in the perspective direction, only one holdingmember 9 may be provided, or a plurality of holdingmembers 9 may be provided. When a plurality of holdingmembers 9 are provided, as described above, the distance between the plurality of holdingmembers 9 in the perspective direction is preferably 10 mm or more and 50 mm or less, but the distance between the holdingmembers 9 may be less than 10 mm. .. The length of the holdingmember 9 that can be reduced in the perspective direction may be 1 mm or more and 10 mm or less as described above, but the length in the perspective direction may exceed 10 mm.

 保持部材9は、より小さい力で線状牽引部材7を近位側に牽引できる点から、図4に示すように、線状牽引部材7に対して遠近方向に移動可能であるものが好ましく、線状牽引部材7を近位側に牽引したときに遠近方向に縮小しないものがより好ましい。また、よりスムーズに線状牽引部材7を近位側に牽引することができる点から、保持部材9は、線状牽引部材7と内側チューブ4の両方に対して遠近方向に移動可能であることがより好ましい。すなわち、保持部材9は、線状牽引部材7と内側チューブ4の両方に対して非固定であることがより好ましい。As shown in FIG. 4, the holdingmember 9 is preferably movable in the perspective direction with respect to thelinear traction member 7 because thelinear traction member 7 can be towed proximally with a smaller force. It is more preferable that thelinear traction member 7 does not shrink in the perspective direction when it is towed to the proximal side. Further, the holdingmember 9 can move in the perspective direction with respect to both thelinear towing member 7 and theinner tube 4 from the viewpoint that thelinear towing member 7 can be towed to the proximal side more smoothly. Is more preferable. That is, it is more preferable that the holdingmember 9 is not fixed to both thelinear traction member 7 and theinner tube 4.

 保持部材9は、図6に示すように、近位側または遠位側から見て、単環状に形成されていることが好ましい。単環状の保持部材9が線状牽引部材7と内側チューブ4を一緒に拘束することにより、遠近方向に対する垂直断面で、線状牽引部材7と内側チューブ4をコンパクトにまとめることができ、保護チューブ5の外径を小さく形成することができる。また、保持部材9と線状牽引部材7との接触面積を小さくすることができるため、線状牽引部材7を近位側に引く際の接触抵抗の増大を抑えることができる。さらに、保持部材9を周方向に同一形状に形成することによって保持部材9の向きの選択性をなくすことができるため、搬送装置1の組立作業が容易になり生産効率を高めることもできる。As shown in FIG. 6, the holdingmember 9 is preferably formed in a monocyclic shape when viewed from the proximal side or the distal side. By restraining thelinear traction member 7 and theinner tube 4 together by the monocyclic holdingmember 9, thelinear traction member 7 and theinner tube 4 can be compactly put together in a vertical cross section with respect to the perspective direction, and the protective tube. The outer diameter of 5 can be made small. Further, since the contact area between the holdingmember 9 and thelinear traction member 7 can be reduced, an increase in contact resistance when thelinear traction member 7 is pulled to the proximal side can be suppressed. Further, by forming the holdingmember 9 in the same shape in the circumferential direction, the selectivity of the orientation of the holdingmember 9 can be eliminated, so that the assembling work of thetransport device 1 can be facilitated and the production efficiency can be improved.

 単環状に形成された保持部材9は弾性変形可能であることが好ましい。これにより、線状牽引部材7の遠近方向への移動を可能にしつつ、保持部材9によって線状牽引部材7と内側チューブ4を好適に保持しやすくなる。It is preferable that the holdingmember 9 formed in a single ring shape is elastically deformable. This makes it easier for the holdingmember 9 to preferably hold thelinear traction member 7 and theinner tube 4 while allowing thelinear traction member 7 to move in the perspective direction.

 単環状に形成された保持部材9の無負荷時の内径は、線状牽引部材7の外径と内側チューブ4の外径の和と近い値であることが好ましい。例えば、単環状の保持部材9の無負荷時の内径は、線状牽引部材7の外径と内側チューブ4の外径の和の0.85倍以上が好ましく、0.90倍以上がより好ましく、0.95倍以上がさらに好ましく、また1.30倍以下が好ましく、1.20倍以下がより好ましく、1.10倍以下がさらに好ましい。これにより、線状牽引部材7の遠近方向への移動を可能にしつつ、保持部材9によって線状牽引部材7と内側チューブ4を好適に保持しやすくなる。なお、無負荷時の保持部材9の形状は、搬送装置1から保持部材9のみを取り出して負荷をかけずに置いたときの形状を意味し、通常は略円形に形成されることが好ましい。The inner diameter of the holdingmember 9 formed in a single ring shape when no load is applied is preferably a value close to the sum of the outer diameter of thelinear traction member 7 and the outer diameter of theinner tube 4. For example, the inner diameter of the singleannular holding member 9 when no load is applied is preferably 0.85 times or more, more preferably 0.90 times or more, the sum of the outer diameter of thelinear traction member 7 and the outer diameter of theinner tube 4. , 0.95 times or more, more preferably 1.30 times or less, more preferably 1.20 times or less, still more preferably 1.10 times or less. This makes it easier for the holdingmember 9 to preferably hold thelinear traction member 7 and theinner tube 4 while allowing thelinear traction member 7 to move in the perspective direction. The shape of the holdingmember 9 when there is no load means the shape when only the holdingmember 9 is taken out from thetransport device 1 and placed without applying a load, and is usually preferably formed in a substantially circular shape.

 単環状に形成された保持部材9の無負荷時の内径は、線状牽引部材7の外径と内側チューブ4の外径の和よりも小さいことが好ましい。例えば、単環状の保持部材9は、近位側または遠位側から見て、無負荷時に略円形に形成され、線状牽引部材7と内側チューブ4を内挿してこれらを保持したときに非円形(例えば、長円形)となることが好ましい。そして、単環状の保持部材9の無負荷時の円形の内径をD1とし、線状牽引部材7の外径をD2とし、内側チューブ4の外径をD3としたとき、D1<D2+D3の関係を有することが好ましい。このように保持部材9が形成されていれば、線状牽引部材7を遠近方向に移動する操作を行わない状態で、保持部材9を線状牽引部材7および内側チューブ4の所定の位置に保持することが容易になる。そのため、シャフト部2を内視鏡の鉗子チャンネルに挿入して医療用管状体20を病変部に搬送する際、線状牽引部材7と内側チューブ4に対して保持部材9が初期の位置に維持されやすくなり、保持部材9を設けることの効果が好適に発揮されやすくなる。The inner diameter of the holdingmember 9 formed in a single ring shape when no load is applied is preferably smaller than the sum of the outer diameter of thelinear traction member 7 and the outer diameter of theinner tube 4. For example, the monocyclic holdingmember 9 is formed in a substantially circular shape when no load is applied when viewed from the proximal side or the distal side, and is not formed when thelinear traction member 7 and theinner tube 4 are inserted and held. It is preferably circular (for example, oval). Then, when the circular inner diameter of the singleannular holding member 9 when no load is applied is D1 , the outer diameter of thelinear traction member 7 is D2, and the outer diameter of theinner tube 4 is D3 , then D1 < It is preferable to have a relationship of D2 + D3 . When the holdingmember 9 is formed in this way, the holdingmember 9 is held at a predetermined position of thelinear traction member 7 and theinner tube 4 without performing the operation of moving thelinear traction member 7 in the perspective direction. It will be easier to do. Therefore, when theshaft portion 2 is inserted into the forceps channel of the endoscope and the medicaltubular body 20 is conveyed to the lesion portion, the holdingmember 9 is maintained at the initial position with respect to thelinear traction member 7 and theinner tube 4. The effect of providing the holdingmember 9 is likely to be suitably exhibited.

 保持部材9は、線状牽引部材7を内側チューブ4に対して遠近方向に移動させる操作を行うまで、線状牽引部材7および/または内側チューブ4に仮留めされていることも好ましい。この場合も、シャフト部2を内視鏡の鉗子チャンネルに挿入して医療用管状体20を病変部に搬送する際、線状牽引部材7と内側チューブ4に対して保持部材9が初期の位置に維持されやすくなり、保持部材9を設けることの効果が好適に発揮されやすくなる。保持部材9の線状牽引部材7および/または内側チューブ4への仮留めは、例えば、接着力の弱い接着剤で保持部材9を線状牽引部材7および/または内側チューブ4へ接着することにより行うことができる。It is also preferable that the holdingmember 9 is temporarily fastened to thelinear traction member 7 and / or theinner tube 4 until the operation of moving thelinear traction member 7 in the perspective direction with respect to theinner tube 4 is performed. Also in this case, when theshaft portion 2 is inserted into the forceps channel of the endoscope and the medicaltubular body 20 is conveyed to the lesion portion, the holdingmember 9 is in the initial position with respect to thelinear traction member 7 and theinner tube 4. The effect of providing the holdingmember 9 is likely to be suitably exhibited. Temporary fastening of the holdingmember 9 to thelinear traction member 7 and / or theinner tube 4 is performed, for example, by adhering the holdingmember 9 to thelinear traction member 7 and / or theinner tube 4 with an adhesive having a weak adhesive force. It can be carried out.

 保護チューブ5の内腔には、線状牽引部材7が内腔に挿通される牽引部材収納チューブ8が設けられることが好ましい。この場合、線状牽引部材7は、遠位端部が外側チューブ3に接合され、外側チューブ3の近位端3Pよりも近位側の部分の少なくとも一部が、牽引部材収納チューブ8の内腔に挿通されることとなる。牽引部材収納チューブ8の内腔に線状牽引部材7を挿通することにより、線状牽引部材7が保持部材9によって内側チューブ4と拘束されない部分で、線状牽引部材7が保護チューブ5の内部で迷入することや、線状牽引部材7が牽引部材収納チューブ8以外の部材に巻き付くことや、線状牽引部材7に極度な撓みが発生することを防ぐことができる。It is preferable that the cavity of theprotective tube 5 is provided with a tractionmember storage tube 8 through which thelinear traction member 7 is inserted into the cavity. In this case, the distal end of thelinear traction member 7 is joined to theouter tube 3, and at least a part of the portion proximal to theproximal end 3P of theouter tube 3 is inside the tractionmember storage tube 8. It will be inserted into the cavity. By inserting thelinear traction member 7 into the cavity of the tractionmember storage tube 8, thelinear traction member 7 is not restrained from theinner tube 4 by the holdingmember 9, and thelinear traction member 7 is inside theprotective tube 5. It is possible to prevent thelinear traction member 7 from wrapping around a member other than the tractionmember storage tube 8 and to prevent thelinear traction member 7 from being extremely bent.

 牽引部材収納チューブ8の遠位端8Dは、外側チューブ3が最も近位側に位置する状態で、外側チューブ3の近位端3Pより近位側にあることが好ましい。一方、牽引部材収納チューブ8の近位側の部分については、牽引部材収納チューブ8は保護チューブ5の近位端5Pまで延在することが好ましく、保護チューブ5の近位端5Pよりも近位側に延在し、コントローラー12まで延びていてもよい。Thedistal end 8D of the tractionmember storage tube 8 is preferably located proximal to theproximal end 3P of theouter tube 3 with theouter tube 3 located most proximally. On the other hand, regarding the portion on the proximal side of the tractionmember storage tube 8, the tractionmember storage tube 8 preferably extends to theproximal end 5P of theprotective tube 5, and is proximal to theproximal end 5P of theprotective tube 5. It may extend to the side and extend to thecontroller 12.

 牽引部材収納チューブ8が設けられる場合、保持部材9は、外側チューブ3の近位端3Pより近位側かつ牽引部材収納チューブ8の遠位端8Dより遠位側に配置されることが好ましい。これにより、線状牽引部材7が牽引部材収納チューブ8の内腔に収納されない部分で、保持部材9によって線状牽引部材7が内側チューブ4に巻き付くことが抑えられ、また線状牽引部材7を近位側に引く際に、線状牽引部材7と内側チューブ4との屈曲差が広がることを抑えることができる。なお、保持部材9は、外側チューブ3が最も遠位側に位置する状態で、外側チューブ3の近位端3Pより近位側かつ牽引部材収納チューブ8の遠位端8Dより遠位側に設けられることが好ましく、線状牽引部材7を近位側に引いて外側チューブ3が最も近位側に位置する状態においても、保持部材9は、外側チューブ3の近位端3Pより近位側かつ牽引部材収納チューブ8の遠位端8Dより遠位側にあることが好ましい。When the tractionmember storage tube 8 is provided, it is preferable that the holdingmember 9 is arranged on the proximal side of theproximal end 3P of theouter tube 3 and on the distal side of thedistal end 8D of the tractionmember storage tube 8. As a result, the holdingmember 9 prevents thelinear traction member 7 from being wound around theinner tube 4 at the portion where thelinear traction member 7 is not housed in the cavity of the tractionmember storage tube 8, and thelinear traction member 7 is prevented from being wound around theinner tube 4. It is possible to suppress the widening of the bending difference between thelinear traction member 7 and theinner tube 4 when pulling the tube to the proximal side. The holdingmember 9 is provided on the proximal side of theproximal end 3P of theouter tube 3 and on the distal side of thedistal end 8D of the tractionmember storage tube 8 in a state where theouter tube 3 is located on the most distal side. The holdingmember 9 is proximal to theproximal end 3P of theouter tube 3 even when thelinear traction member 7 is pulled proximally and theouter tube 3 is located most proximally. It is preferably located distal to thedistal end 8D of the tractionmember storage tube 8.

 外側チューブ3が最も遠位側に位置する状態で、外側チューブ3の近位端3Pから牽引部材収納チューブ8の遠位端8Dまでの遠近方向の長さと保持部材9の遠近方向の長さとの差は、外側チューブ3の内腔に配置される医療用管状体20の遠近方向の長さよりも長いことが好ましい。これにより、線状牽引部材7を近位側に牽引した際に、医療用管状体20をシャフト部2の外側に確実に露出させやすくなる。なお、ここで説明した保持部材9の遠近方向の長さとは、保持部材9が複数ある場合はその合計長さを意味し、保持部材9が遠近方向に縮小可能である場合、遠近方向に縮小した状態での遠近方向の長さを意味する。With theouter tube 3 located most distally, the perspective length from theproximal end 3P of theouter tube 3 to thedistal end 8D of the tractionmember storage tube 8 and the perspective length of the holdingmember 9. The difference is preferably longer than the perspective length of the medicaltubular body 20 located in the lumen of theouter tube 3. As a result, when thelinear traction member 7 is towed to the proximal side, the medicaltubular body 20 can be reliably exposed to the outside of theshaft portion 2. The perspective length of the holdingmember 9 described here means the total length of the holdingmember 9 when there are a plurality of holdingmembers 9, and when the holdingmember 9 can be reduced in the perspective direction, the holdingmember 9 is reduced in the perspective direction. It means the length in the perspective direction in the state of being.

 牽引部材収納チューブ8が設けられる場合、保持部材9は、外側チューブ3が最も遠位側にある状態で、外側チューブ3の近位端3Pと牽引部材収納チューブ8の遠位端8Dの間の中間点から20mm以内に配置されることが好ましく、10mm以内がより好ましく、5mm以内がさらに好ましい。これにより、シャフト部2を内視鏡の鉗子チャンネルに挿入して進行させる際に、線状牽引部材7の内側チューブ4への巻き付きをより防止しやすくなり、手元側からのトルク伝達性をより高めることができる。When the tractionmember storage tube 8 is provided, the holdingmember 9 is placed between theproximal end 3P of theouter tube 3 and thedistal end 8D of the tractionmember storage tube 8 with theouter tube 3 on the most distal side. It is preferably arranged within 20 mm from the midpoint, more preferably within 10 mm, even more preferably within 5 mm. As a result, when theshaft portion 2 is inserted into the forceps channel of the endoscope and advanced, it becomes easier to prevent thelinear traction member 7 from wrapping around theinner tube 4, and the torque transmission from the hand side is further improved. Can be enhanced.

 保持部材9は、外側チューブ3が最も遠位側にある状態で、外側チューブ3の近位端3Pの近傍に配置されることも好ましい。例えば、保持部材9は、外側チューブ3の近位端3Pから近位側に20mm以内に配置されることが好ましく、10mm以内がより好ましく、5mm以内がさらに好ましい。外側チューブ3の近位端3Pの近傍で線状牽引部材7が内側チューブ4に巻き付くと、線状牽引部材7を近位側に引く際の抵抗が大きく増大するところ、このように保持部材9を配置することにより、線状牽引部材7を近位側に引く際の抵抗の増大を抑えることができる。また、このように保持部材9を配置することにより、線状牽引部材7が外側チューブ3の近位端部の所定の位置に安定して接続されやすくなる。It is also preferable that the holdingmember 9 is arranged in the vicinity of theproximal end 3P of theouter tube 3 with theouter tube 3 on the most distal side. For example, the holdingmember 9 is preferably arranged within 20 mm proximal to theproximal end 3P of theouter tube 3, more preferably within 10 mm, and even more preferably within 5 mm. When thelinear traction member 7 winds around theinner tube 4 in the vicinity of theproximal end 3P of theouter tube 3, the resistance when pulling thelinear traction member 7 to the proximal side greatly increases. In this way, the holding member By arranging the 9, it is possible to suppress an increase in resistance when thelinear traction member 7 is pulled to the proximal side. Further, by arranging the holdingmember 9 in this way, thelinear traction member 7 can be easily stably connected to a predetermined position at the proximal end of theouter tube 3.

 保持部材9は、外側チューブ3が最も遠位側にある状態で、牽引部材収納チューブ8の遠位端8Dの近傍に配置されることも好ましい。例えば、保持部材9は、牽引部材収納チューブ8の遠位端8Dから遠位側に20mm以内に配置されることが好ましく、10mm以内がより好ましく、5mm以内がさらに好ましい。牽引部材収納チューブ8の遠位端8Dの近傍で線状牽引部材7が内側チューブ4に巻き付くと、線状牽引部材7を近位側に引く際の抵抗が大きく増大するところ、このように保持部材9を配置することにより、線状牽引部材7を近位側に引く際の抵抗の増大を抑えることができる。また、このように保持部材9を配置することにより、線状牽引部材7が牽引部材収納チューブ8に安定して収納されやすくなる。It is also preferable that the holdingmember 9 is arranged in the vicinity of thedistal end 8D of the tractionmember storage tube 8 with theouter tube 3 on the most distal side. For example, the holdingmember 9 is preferably arranged within 20 mm distal to thedistal end 8D of the towmember storage tube 8, more preferably within 10 mm, even more preferably within 5 mm. When thelinear traction member 7 is wound around theinner tube 4 in the vicinity of thedistal end 8D of the tractionmember storage tube 8, the resistance when thelinear traction member 7 is pulled to the proximal side is greatly increased. By arranging the holdingmember 9, it is possible to suppress an increase in resistance when thelinear traction member 7 is pulled to the proximal side. Further, by arranging the holdingmember 9 in this way, thelinear traction member 7 can be easily stably stored in the tractionmember storage tube 8.

 牽引部材収納チューブ8の内径は、線状牽引部材7の外径の1.1倍以上が好ましく、1.2倍以上がより好ましく、1.3倍以上がさらに好ましい。これにより、線状牽引部材7を遠近方向に移動させる際に、線状牽引部材7と牽引部材収納チューブ8との間で摩擦抵抗が過度に増大しにくくなる。一方、牽引部材収納チューブ8の内径は、線状牽引部材7の外径の3.0倍以下が好ましく、2.5倍以下がより好ましく、2.0倍以下がさらに好ましい。これにより、牽引部材収納チューブ8内での線状牽引部材7の撓みを抑制し、線状牽引部材7を効率的に牽引することができる。The inner diameter of the towmember storage tube 8 is preferably 1.1 times or more, more preferably 1.2 times or more, still more preferably 1.3 times or more the outer diameter of thelinear tow member 7. As a result, when thelinear traction member 7 is moved in the perspective direction, the frictional resistance between thelinear traction member 7 and the tractionmember storage tube 8 is less likely to increase excessively. On the other hand, the inner diameter of the towmember storage tube 8 is preferably 3.0 times or less, more preferably 2.5 times or less, still more preferably 2.0 times or less the outer diameter of thelinear tow member 7. As a result, the bending of thelinear towing member 7 in the towingmember storage tube 8 can be suppressed, and thelinear towing member 7 can be efficiently towed.

 牽引部材収納チューブ8は、樹脂、金属またはこれらの複合材料から構成することができる。これらの各材料の具体例は、上記のシャフト部2の構成材料の説明が参照される。なかでも、牽引部材収納チューブ8は金属から構成されることが好ましく、ステンレスから構成されることがより好ましい。このように牽引部材収納チューブ8が構成されることにより、牽引部材収納チューブ8の耐久性を高めることができ、線状牽引部材7を牽引部材収納チューブ8の内腔に挿通した状態で遠近方向へ繰り返し移動させても、牽引部材収納チューブ8が破損しにくくなる。また、牽引部材収納チューブ8の外径を小さく形成しても高い剛性を確保しやすくなるため、シャフト部2の全体を細径化することが可能となる。The tractionmember storage tube 8 can be made of resin, metal or a composite material thereof. For specific examples of each of these materials, the above description of the constituent materials of theshaft portion 2 is referred to. Among them, the tractionmember storage tube 8 is preferably made of metal, and more preferably made of stainless steel. By configuring the tractionmember storage tube 8 in this way, the durability of the tractionmember storage tube 8 can be enhanced, and thelinear traction member 7 is inserted into the cavity of the tractionmember storage tube 8 in the perspective direction. The tractionmember storage tube 8 is less likely to be damaged even if it is repeatedly moved to. Further, even if the outer diameter of the towmember storage tube 8 is made small, it becomes easy to secure high rigidity, so that the entire diameter of theshaft portion 2 can be reduced.

 牽引部材収納チューブ8は、内側チューブ4に対して、遠近方向の位置が固定されていることが好ましい。例えば、牽引部材収納チューブ8は、少なくとも一部が、内側チューブ4と接合していることが好ましい。牽引部材収納チューブ8を内側チューブ4に対して遠近方向の位置を固定することにより、シャフト部2のプッシャビリティが高められ、医療用管状体20の病変部への送達性を向上させることができる。また、線状牽引部材7を安定して近位側に牽引しやすくなるため、医療用管状体20の展開を容易にすることができる。牽引部材収納チューブ8を内側チューブ4に対して遠近方向の位置を固定する方法としては、牽引部材収納チューブ8と内側チューブ4とを接着、溶着、嵌合または螺合する方法、熱収縮性を有する樹脂管へ牽引部材収納チューブ8と内側チューブ4を挿通して樹脂管を熱収縮させる方法、金属管へ牽引部材収納チューブ8と内側チューブ4を挿通して金属管をかしめる方法等が挙げられる。It is preferable that the towmember storage tube 8 has a fixed position in the perspective direction with respect to theinner tube 4. For example, it is preferable that at least a part of the tractionmember storage tube 8 is joined to theinner tube 4. By fixing the position of the tractionmember storage tube 8 in the perspective direction with respect to theinner tube 4, the pushability of theshaft portion 2 can be enhanced, and the deliverability of the medicaltubular body 20 to the lesion portion can be improved. .. Further, since thelinear traction member 7 can be stably towed to the proximal side, the medicaltubular body 20 can be easily deployed. As a method of fixing the position of the tractionmember storage tube 8 with respect to theinner tube 4 in the perspective direction, a method of adhering, welding, fitting or screwing the tractionmember storage tube 8 and theinner tube 4, and heat shrinkage are used. Examples include a method of inserting the tractionmember storage tube 8 and theinner tube 4 into the resin tube to be provided to heat-shrink the resin tube, a method of inserting the tractionmember storage tube 8 and theinner tube 4 into the metal tube, and crimping the metal tube. Be done.

 牽引部材収納チューブ8は、保護チューブ5に対して、遠近方向の位置が固定されていることが好ましい。例えば、牽引部材収納チューブ8は、少なくとも一部が、保護チューブ5と接合していることが好ましく、保護チューブ5の近位端部と接合していることがより好ましい。牽引部材収納チューブ8は保護チューブ5と直接的に接合していてもよく、コントローラー12等の他の部材を介して間接的に接合していてもよい。牽引部材収納チューブ8を保護チューブ5に対して遠近方向の位置を固定することにより、シャフト部2のプッシャビリティが高められ、医療用管状体20の病変部への送達性を向上させることができる。また、線状牽引部材7を安定して近位側に牽引しやすくなるため、医療用管状体20の展開を容易にすることができる。さらに、医療用管状体20の展開時の牽引部材収納チューブ8の遠近方向の移動が抑制されることにより、医療用管状体20を体内に留置する際の位置精度の安定性が向上する。It is preferable that the towmember storage tube 8 has a fixed position in the perspective direction with respect to theprotective tube 5. For example, it is preferable that at least a part of the towmember storage tube 8 is joined to theprotective tube 5, and more preferably to the proximal end of theprotective tube 5. The tractionmember storage tube 8 may be directly joined to theprotective tube 5, or may be indirectly joined via another member such as thecontroller 12. By fixing the position of the tractionmember storage tube 8 in the perspective direction with respect to theprotective tube 5, the pushability of theshaft portion 2 can be enhanced, and the deliverability of the medicaltubular body 20 to the lesion portion can be improved. .. Further, since thelinear traction member 7 can be stably towed to the proximal side, the medicaltubular body 20 can be easily deployed. Further, by suppressing the movement of the tractionmember storage tube 8 in the perspective direction when the medicaltubular body 20 is deployed, the stability of the position accuracy when the medicaltubular body 20 is placed in the body is improved.

 牽引部材収納チューブ8を保護チューブ5に対して遠近方向の位置を固定する方法としては、牽引部材収納チューブ8と保護チューブ5とを接着、溶着、嵌合または螺合する方法、熱収縮性を有する樹脂管へ牽引部材収納チューブ8と保護チューブ5を挿通して樹脂管を熱収縮させる方法、金属管へ牽引部材収納チューブ8と保護チューブ5を挿通して金属管をかしめる方法等が挙げられる。牽引部材収納チューブ8と保護チューブ5とを嵌合する方法として、例えば、牽引部材収納チューブ8の外側面と保護チューブ5の内側面にそれぞれ突起を設け、これらの突起どうしが当接する構造とすることで、牽引部材収納チューブ8の保護チューブ5に対する遠近方向の位置を固定してもよい。あるいは、保護チューブ5をコントローラー12と嵌合し、牽引部材収納チューブ8をコントローラー12に接合することにより、牽引部材収納チューブ8の保護チューブ5に対する遠近方向の位置を固定してもよい。As a method of fixing the position of the tractionmember storage tube 8 with respect to theprotective tube 5 in the perspective direction, a method of adhering, welding, fitting or screwing the tractionmember storage tube 8 and theprotective tube 5, and heat shrinkage are used. Examples include a method of inserting the tractionmember storage tube 8 and theprotective tube 5 into the resin tube to be provided to heat-shrink the resin tube, a method of inserting the tractionmember storage tube 8 and theprotective tube 5 into the metal tube, and crimping the metal tube. Be done. As a method of fitting the tractionmember storage tube 8 and theprotective tube 5, for example, protrusions are provided on the outer surface of the tractionmember storage tube 8 and the inner surface of theprotection tube 5, and the protrusions abut each other. As a result, the position of the towmember storage tube 8 in the perspective direction with respect to theprotective tube 5 may be fixed. Alternatively, theprotective tube 5 may be fitted to thecontroller 12 and the towmember storage tube 8 may be joined to thecontroller 12 to fix the position of the towmember storage tube 8 in the perspective direction with respect to theprotective tube 5.

 搬送装置1は、内側チューブ4の遠位端部に先端チップ10が設けられることが好ましい(図1~図3を参照)。先端チップ10は内腔を有し、当該内腔が内側チューブ4の内腔と連通していることが好ましい。先端チップ10は、外側チューブ3が最も遠位側に位置する状態で、シャフト部2の遠位端部を構成し、これにより、シャフト部2を内視鏡の鉗子チャンネルに挿入して医療用管状体20を病変部に搬送する際に、シャフト部2の先端が生体内管腔を傷つけることを防止することができる。また、先行するガイドワイヤや鉗子チャンネルへのシャフト部2の追従性、病変部へのシャフト部2の先端の送達性を高めることができ、搬送装置1の操作性が向上する。Thetransport device 1 is preferably provided with atip 10 at the distal end of the inner tube 4 (see FIGS. 1 to 3). It is preferable that thetip 10 has a lumen, which communicates with the lumen of theinner tube 4. Thetip tip 10 constitutes the distal end of theshaft portion 2 with theouter tube 3 located most distally, thereby inserting theshaft portion 2 into the forceps channel of the endoscope for medical use. When thetubular body 20 is transported to the lesion portion, it is possible to prevent the tip of theshaft portion 2 from damaging the lumen in the living body. Further, the followability of theshaft portion 2 to the preceding guide wire and the forceps channel and the deliverability of the tip of theshaft portion 2 to the lesion portion can be improved, and the operability of thetransport device 1 is improved.

 先端チップ10の近位端は、外側チューブ3が最も遠位側に位置する状態で、外側チューブ3の遠位端より近位側に位置することが好ましい。すなわち、先端チップ10の近位端部は外側チューブ3の遠位端部の内腔にあることが好ましい。これにより、シャフト部2を内視鏡の鉗子チャンネルに挿入して医療用管状体20を病変部に搬送する際に、先端チップ10の屈曲の動きに対して外側チューブ3が追従しやすくなり、医療用管状体20を病変部に搬送する際のシャフト部2の操作性を高めることができる。The proximal end of thetip tip 10 is preferably located proximal to the distal end of theouter tube 3 with theouter tube 3 located most distally. That is, the proximal end of thetip 10 is preferably in the lumen of the distal end of theouter tube 3. As a result, when theshaft portion 2 is inserted into the forceps channel of the endoscope and the medicaltubular body 20 is conveyed to the lesion portion, theouter tube 3 can easily follow the bending movement of thetip tip 10. The operability of theshaft portion 2 when transporting the medicaltubular body 20 to the lesion portion can be improved.

 先端チップ10は、樹脂、金属またはこれらの複合材料から構成することができる。これらの各材料の具体例は、上記のシャフト部2の構成材料の説明が参照される。なかでも、先端チップ10は、エラストマー樹脂から構成されることが好ましい。エラストマー樹脂としては、ポリウレタン系樹脂、ポリエステル系樹脂、ポリアミド系樹脂等が好ましく挙げられ、特にポリアミド系樹脂から構成されることが好ましい。このように先端チップ10が構成されることにより、先端チップ10のガイドワイヤへの追従性とシャフト部2の先端の安全性を高めることができる。Thetip 10 can be made of resin, metal or a composite material thereof. For specific examples of each of these materials, the above description of the constituent materials of theshaft portion 2 is referred to. Above all, thetip 10 is preferably made of an elastomer resin. Examples of the elastomer resin include polyurethane-based resins, polyester-based resins, and polyamide-based resins, and it is particularly preferable that the elastomer resin is composed of a polyamide-based resin. By configuring thetip tip 10 in this way, it is possible to improve the followability of thetip tip 10 to the guide wire and the safety of the tip of theshaft portion 2.

 搬送装置1は、外側チューブ3を近位側に移動させた際に、医療用管状体20が外側チューブ3とともに近位側に移動せずに搬送装置1の外方へ展開できるようにするために、医療用管状体20の近位側にストッパー11が設けられることが好ましい。ストッパー11は、内側チューブ4の外側面に設けられることが好ましく、医療用管状体20の近位端より近位側かつ保護チューブ5の遠位端より遠位側に設けられることが好ましい。ストッパー11は、医療用管状体20の近位端に当接させて配置させることがより好ましい。このようにストッパー11を設けることにより、外側チューブ3を近位側に牽引した際に、医療用管状体20をシャフト部2の外側に確実に露出させやすくなる。なお、図面には示されていないが、ストッパー11は、医療用管状体20の内側面と内側チューブ4の外側面の間に、医療用管状体20の内側面と内側チューブ4の外側面に接触するように配置することもできる。Thetransport device 1 is for allowing the medicaltubular body 20 to be deployed to the outside of thetransport device 1 together with theouter tube 3 without moving to the proximal side when theouter tube 3 is moved to the proximal side. It is preferable that thestopper 11 is provided on the proximal side of the medicaltubular body 20. Thestopper 11 is preferably provided on the outer surface of theinner tube 4, preferably proximal to the proximal end of the medicaltubular body 20 and distal to the distal end of theprotective tube 5. It is more preferable that thestopper 11 is arranged so as to be in contact with the proximal end of the medicaltubular body 20. By providing thestopper 11 in this way, when theouter tube 3 is pulled to the proximal side, the medicaltubular body 20 can be reliably exposed to the outside of theshaft portion 2. Although not shown in the drawings, thestopper 11 is provided between the inner surface of the medicaltubular body 20 and the outer surface of theinner tube 4, and on the inner surface of the medicaltubular body 20 and the outer surface of theinner tube 4. It can also be placed in contact.

 ストッパー11の形状は、例えばリング形状とすることができる。ストッパー11の外径は、外側チューブ3の内腔に収納している状態の医療用管状体20の外径と同じかそれより小さいことが好ましい。このようにストッパー11を形成することにより、医療用管状体20が近位側に移動した際に、ストッパー11が医療用管状体20の近位端面や内側面に接触して、医療用管状体20がさらに近位側に移動することを防ぐことができる。The shape of thestopper 11 can be, for example, a ring shape. The outer diameter of thestopper 11 is preferably the same as or smaller than the outer diameter of the medicaltubular body 20 housed in the lumen of theouter tube 3. By forming thestopper 11 in this way, when the medicaltubular body 20 moves to the proximal side, thestopper 11 comes into contact with the proximal end face and the inner surface of the medicaltubular body 20 to contact the medicaltubular body 20. It is possible to prevent the 20 from moving further to the proximal side.

 ストッパー11は、樹脂、金属またはこれらの複合材料から構成することができる。これらの各材料の具体例は、上記のシャフト部2の構成材料の説明が参照される。なかでも、ストッパー11はエラストマー樹脂から構成されることが好ましく、これによりストッパー11と医療用管状体20が接触した際に、医療用管状体20の変形や損傷を防ぐことができる。エラストマー樹脂としてはポリアミド系樹脂を用いることが好ましく、これによりストッパー11の剛性が高められ、ストッパー11によって医療用管状体20の近位端を支持し、医療用管状体20を効果的に展開することができる。また、ストッパー11の成形加工が容易になるという効果も得られる。Thestopper 11 can be made of resin, metal or a composite material thereof. For specific examples of each of these materials, the above description of the constituent materials of theshaft portion 2 is referred to. Among them, thestopper 11 is preferably made of an elastomer resin, which can prevent the medicaltubular body 20 from being deformed or damaged when thestopper 11 and the medicaltubular body 20 come into contact with each other. As the elastomer resin, it is preferable to use a polyamide resin, whereby the rigidity of thestopper 11 is increased, the proximal end of the medicaltubular body 20 is supported by thestopper 11, and the medicaltubular body 20 is effectively developed. be able to. In addition, the effect of facilitating the molding process of thestopper 11 can be obtained.

 シャフト部2には、X線不透過マーカーが設けられてもよい(図示せず)。シャフト部2にX線不透過マーカー設けることにより、X線透視下において、X線不透過マーカーを目印にして、体内におけるシャフト部2の位置を確認することができる。X線不透過マーカーは、シャフト部2の医療用管状体20が配置された箇所の近傍に設けられることが好ましく、先端チップ10やストッパー11に設けることが好ましい。X線不透過マーカーを先端チップ10に設けることにより、X線透視下において、シャフト部2の遠位端部を確認することができる。また、X線不透過マーカーをストッパー11に設けることにより、X線透視下において、医療用管状体20の位置や押し出し状態を確認することができる。X線不透過マーカーを設置する数は、1つであってもよく、複数であってもよい。Theshaft portion 2 may be provided with an X-ray opaque marker (not shown). By providing the X-ray opaque marker on theshaft portion 2, the position of theshaft portion 2 in the body can be confirmed by using the X-ray opaque marker as a mark under fluoroscopy. The X-ray opaque marker is preferably provided near the portion where the medicaltubular body 20 of theshaft portion 2 is arranged, and is preferably provided on thetip tip 10 or thestopper 11. By providing thetip 10 with an X-ray opaque marker, the distal end portion of theshaft portion 2 can be confirmed under fluoroscopy. Further, by providing the X-ray opaque marker on thestopper 11, the position and the extruded state of the medicaltubular body 20 can be confirmed under fluoroscopy. The number of X-ray opaque markers installed may be one or may be plural.

 本願は、2019年3月29日に出願された日本国特許出願第2019-068429号に基づく優先権の利益を主張するものである。2019年3月29日に出願された日本国特許出願第2019-068429号の明細書の全内容が、本願に参考のため援用される。This application claims the benefit of priority based on Japanese Patent Application No. 2019-066429 filed on March 29, 2019. The entire contents of the specification of Japanese Patent Application No. 2019-068424 filed on March 29, 2019 are incorporated herein by reference.

 1:医療用管状体搬送装置
 2:シャフト部
 3:外側チューブ
 4:内側チューブ
 5:保護チューブ
 6:ガイドワイヤポート
 7:線状牽引部材
 8:牽引部材収納チューブ
 9:保持部材
 10:先端チップ
 11:ストッパー
 12:コントローラー
 20:医療用管状体
1: Medical tubular body transfer device 2: Shaft part 3: Outer tube 4: Inner tube 5: Protective tube 6: Guide wire port 7: Linear traction member 8: Tow member storage tube 9: Holding member 10: Tip tip 11 : Stopper 12: Controller 20: Medical tubular body

Claims (12)

Translated fromJapanese
 医療用管状体を体内に搬送する装置であって;
 医療用管状体が内腔に配置される外側チューブと;
 前記外側チューブの近位端部に接続され、前記外側チューブの近位端より近位側に延在する線状牽引部材と;
 前記外側チューブの内腔と前記医療用管状体の内腔に配置されるとともに、前記外側チューブの近位端より近位側に延在する内側チューブと;
 前記外側チューブの近位端部と、前記内側チューブの前記外側チューブの近位端より近位側に延在する部分と、前記線状牽引部材とが内腔に配置された保護チューブとを有し;
 前記保護チューブの内腔には、前記線状牽引部材と前記内側チューブとを拘束する保持部材が設けられ、前記保持部材が前記線状牽引部材に対して遠近方向に移動可能に形成されていることを特徴とする医療用管状体搬送装置。
A device that transports a medical tubular body into the body;
With the outer tube where the medical tubular body is placed in the lumen;
With a linear traction member connected to the proximal end of the outer tube and extending proximally from the proximal end of the outer tube;
With an inner tube that is located in the lumen of the outer tube and the lumen of the medical tubular body and extends proximally to the proximal end of the outer tube;
It has a proximal end of the outer tube, a portion of the inner tube extending proximal to the proximal end of the outer tube, and a protective tube in which the linear traction member is disposed in the lumen. ;
A holding member for restraining the linear traction member and the inner tube is provided in the cavity of the protective tube, and the holding member is formed so as to be movable in the perspective direction with respect to the linear traction member. A medical tubular body transport device characterized by this.
 医療用管状体を体内に搬送する装置であって;
 医療用管状体が内腔に配置される外側チューブと;
 前記外側チューブの近位端部に接続され、前記外側チューブの近位端より近位側に延在する線状牽引部材と;
 前記外側チューブの内腔と前記医療用管状体の内腔に配置されるとともに、前記外側チューブの近位端より近位側に延在する内側チューブと;
 前記外側チューブの近位端部と、前記内側チューブの前記外側チューブの近位端より近位側に延在する部分と、前記線状牽引部材とが内腔に配置された保護チューブとを有し;
 前記保護チューブの内腔には、前記線状牽引部材と前記内側チューブとを拘束する保持部材が設けられ、前記保持部材の遠近方向の長さが縮小可能であることを特徴とする医療用管状体搬送装置。
A device that transports a medical tubular body into the body;
With the outer tube where the medical tubular body is placed in the lumen;
With a linear traction member connected to the proximal end of the outer tube and extending proximally from the proximal end of the outer tube;
With an inner tube that is located in the lumen of the outer tube and the lumen of the medical tubular body and extends proximally to the proximal end of the outer tube;
It has a proximal end of the outer tube, a portion of the inner tube extending proximal to the proximal end of the outer tube, and a protective tube in which the linear traction member is disposed in the lumen. ;
A medical tubular characterized in that a holding member for restraining the linear traction member and the inner tube is provided in the cavity of the protective tube, and the length of the holding member in the perspective direction can be reduced. Body transport device.
 前記保持部材は複数設けられている請求項1または2に記載の医療用管状体搬送装置。The medical tubular body transport device according to claim 1 or 2, wherein a plurality of the holding members are provided. 前記複数の保持部材の遠近方向の離間間隔は10mm以上50mm以下である請求項3に記載の医療用管状体搬送装置。The medical tubular body transport device according to claim 3, wherein the distance between the plurality of holding members in the perspective direction is 10 mm or more and 50 mm or less. 前記保持部材は、近位側または遠位側から見て、単環状に形成されている請求項1~4のいずれか一項に記載の医療用管状体搬送装置。The medical tubular body transport device according to any one of claims 1 to 4, wherein the holding member is formed in a monocyclic shape when viewed from the proximal side or the distal side. 前記単環状に形成された保持部材の無負荷時の内径は、前記線状牽引部材の外径と前記内側チューブの外径の和よりも小さい請求項5に記載の医療用管状体搬送装置。The medical tubular body transport device according to claim 5, wherein the inner diameter of the holding member formed in a single ring shape when no load is smaller than the sum of the outer diameter of the linear traction member and the outer diameter of the inner tube. 前記保持部材は前記線状牽引部材および前記内側チューブに対して遠近方向に移動可能に形成されている請求項1~6のいずれか一項に記載の医療用管状体搬送装置。The medical tubular body transport device according to any one of claims 1 to 6, wherein the holding member is formed so as to be movable in a perspective direction with respect to the linear traction member and the inner tube. 前記保持部材の遠近方向の長さは1mm以上10mm以下である請求項1~7のいずれか一項に記載の医療用管状体搬送装置。The medical tubular body transport device according to any one of claims 1 to 7, wherein the length of the holding member in the perspective direction is 1 mm or more and 10 mm or less. 前記保護チューブの内腔には、前記線状牽引部材が内腔に挿通されている牽引部材収納チューブが設けられ、
 前記保持部材は、前記外側チューブの近位端より近位側かつ前記牽引部材収納チューブの遠位端より遠位側に配置されている請求項1~8のいずれか一項に記載の医療用管状体搬送装置。
A traction member storage tube through which the linear traction member is inserted is provided in the lumen of the protection tube.
The medical use according to any one of claims 1 to 8, wherein the holding member is arranged proximal to the proximal end of the outer tube and distal to the distal end of the traction member storage tube. Tubular body transport device.
 前記保持部材は、前記外側チューブが最も遠位側にある状態で、前記外側チューブの近位端と前記牽引部材収納チューブの遠位端との中間点から20mm以内に配置されている請求項9に記載の医療用管状体搬送装置。9. The holding member is arranged within 20 mm from the midpoint between the proximal end of the outer tube and the distal end of the traction member storage tube with the outer tube on the most distal side. The medical tubular body transport device according to. 前記保持部材は、前記外側チューブが最も遠位側にある状態で、前記牽引部材収納チューブの遠位端から遠位側に20mm以内に配置されている請求項9または10に記載の医療用管状体搬送装置。The medical tubular according to claim 9 or 10, wherein the holding member is arranged within 20 mm distal to the distal end of the traction member storage tube with the outer tube on the most distal side. Body transport device. 前記保持部材は、前記外側チューブが最も遠位側にある状態で、前記外側チューブの近位端から近位側に20mm以内に配置されている請求項1~11のいずれか一項に記載の医療用管状体搬送装置。The holding member according to any one of claims 1 to 11, wherein the holding member is arranged within 20 mm from the proximal end to the proximal side of the outer tube with the outer tube on the most distal side. Medical tubular body transport device.
PCT/JP2020/0019082019-03-292020-01-21Medical tubular body delivery deviceCeasedWO2020202715A1 (en)

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