本発明は、医療用の穿刺針に関する。 The present invention relates to a medical puncture needle.
超音波診断装置での観察下にて生体内へ穿刺を行う穿刺針は、一般に生体内の特定の部位を狙って針先を導き、目的部位の体液の排出、採取、又は薬液の注入等を行うものである。穿刺針は、管状の外筒針と、外筒針の先端まで摺動自在な中実の内針が組み合わされた構成からなり、この組み合わされた状態で生体内に穿刺を行う。外筒針と内針はそれぞれ末端に針基が取付けられている。穿刺針の有効長さは穿刺の目的部位にもよるが、２００ｍｍ前後であることが一般的であり、材質として外筒針も内針もステンレス鋼などで構成され、各々先端を鋭角に切断、研磨され生体内に穿刺できる針となっている。 A puncture needle that performs puncture into a living body under observation with an ultrasonic diagnostic apparatus generally guides the needle tip to a specific part in the living body, and discharges, collects, or injects medicinal liquid at a target part. Is what you do. The puncture needle has a configuration in which a tubular outer cylinder needle and a solid inner needle slidable to the tip of the outer cylinder needle are combined, and puncture is performed in the living body in this combined state. A needle base is attached to each end of the outer cylinder needle and the inner needle. Although the effective length of the puncture needle depends on the target site of puncture, it is generally around 200 mm. The outer and inner needles are made of stainless steel as the material, and each tip is cut and polished at an acute angle. It is a needle that can be punctured into a living body.
穿刺できる針としての刃を形成しているのは外筒針先端であり、内針の先端は外筒針の刃面に合わせた角度に切断、研磨され、外筒針の刃面と合わせた位置関係になるように組み合わされているが、針としての刃は構成されないことが一般的である。 It is the tip of the outer cylinder needle that forms the blade as a needle that can be punctured, and the tip of the inner needle is cut and polished at an angle that matches the blade surface of the outer cylinder needle, and has a positional relationship that matches the blade surface of the outer cylinder needle In general, a blade as a needle is not configured.
この穿刺針は生体内の特定の部位までの穿刺を目的としているため、通常は超音波診断装置にて穿刺状態を観察しながら穿刺するが、針部分が滑らかな表面性状の場合には、超音波診断装置から発振される超音波が外筒針の内外周および、内針の外周で入射した超音波が一方向に反射するため、反射された超音波が検出部へ戻ってくる確率が低く、画像として確認することが困難であった。 Since this puncture needle is intended for puncturing to a specific site in the living body, it is usually punctured while observing the puncture state with an ultrasonic diagnostic apparatus. However, if the needle portion has a smooth surface texture, Since the ultrasonic waves oscillated from the ultrasonic diagnostic apparatus are reflected in one direction on the inner and outer circumferences of the outer needle and the outer circumference of the inner needle, the probability that the reflected ultrasonic waves return to the detection unit is low, It was difficult to confirm as an image.
この問題を解決するため、超音波診断装置用の反射波検出部に反射波として戻ってくるように、穿刺針外周面に凹凸加工を施すことにより、超音波を乱反射させ、超音波診断装置の反射波検出部へ戻る反射波を増加させ、超音波診断装置の画像として穿刺針を検出する工夫が広く実施されている（例えば特許文献１）。 In order to solve this problem, the puncture needle outer peripheral surface is subjected to uneven processing so as to return to the reflected wave detection unit for the ultrasonic diagnostic apparatus as a reflected wave, thereby irregularly reflecting the ultrasonic wave. A device for detecting the puncture needle as an image of an ultrasonic diagnostic apparatus by increasing the reflected wave returning to the reflected wave detection unit is widely implemented (for example, Patent Document 1).
この方法は有用ではあるが、外筒針外周面への粗し加工は、加工時のエッジやバリなどにより穿刺の際抵抗を生じ、治療の妨げとなったり、また、過度な凹凸加工は穿刺針そのものの強度低下を招いたりするなど、安全面からの制約により、加工深さや加工方法、加工密度の制限があり、鮮明な超音波診断装置の画像として検出することに限界があった。 Although this method is useful, roughing on the outer peripheral surface of the outer cylinder needle causes resistance during puncture due to edges and burrs during processing, which hinders treatment. Due to safety constraints such as a reduction in the strength of the product itself, there are limitations on the processing depth, processing method, and processing density, and there is a limit to detection as a clear image of an ultrasonic diagnostic apparatus.
この対策として、内針への粗し加工により外筒針外周面への加工を排除し穿刺抵抗への影響を改善することが行われており、例えば非常に傷つきやすい部位への穿刺を行う場合などは外筒針外周面への凹凸や粗し加工が困難とされることもあるため有用な手段である（例えば特許文献２）。 As countermeasures, roughening the inner needle eliminates the processing on the outer peripheral surface of the outer cylinder needle and improves the influence on the puncture resistance. For example, when puncturing a very vulnerable area, etc. Is a useful means because unevenness or roughening on the outer peripheral surface of the outer cylinder needle may be difficult (for example, Patent Document 2).
しかしながら内針外周面での超音波の反射は外筒針を透過する際に超音波が減衰してしまうため、外筒針の材質や肉厚により鮮明な超音波診断装置の画像を得ることに限界があり、一般的な用途に限っては不十分なものであった。
また、外筒針外周面への加工は加工対象が穿刺針という刃物であり外筒針の刃先は生体組織を切り進む刃であるため、刃先外周まで粗し加工を行うと刃こぼれが生じ穿刺性能に影響が出てしまうため刃先最先端までの粗し加工を施すことが困難で、超音波診断装置にて最も検出したい刃先の画像が得られないという問題があった。However, since reflection of ultrasonic waves on the outer peripheral surface of the inner needle attenuates when passing through the outer cylinder needle, there is a limit to obtaining a clear image of the ultrasonic diagnostic apparatus depending on the material and thickness of the outer cylinder needle. Yes, it was insufficient for general purposes only.
In addition, since the object to be processed on the outer peripheral surface of the outer cylinder needle is a cutting tool called a puncture needle and the cutting edge of the outer cylinder needle is a blade that cuts through the living tissue, roughing to the outer periphery of the cutting edge causes blade spilling, resulting in improved puncture performance. As a result, it is difficult to perform roughing up to the cutting edge of the cutting edge, and there is a problem that the image of the cutting edge most desired to be detected by the ultrasonic diagnostic apparatus cannot be obtained.
本発明は、上記事情に鑑みてなされたものであり、その目的は、超音波診断装置での観察下における生体内への穿刺において、穿刺針の刃先末端まで鮮明な超音波診断装置による反射波検出画像を得ることが出来る医療用の穿刺針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 to provide a reflected wave from an ultrasonic diagnostic device that is clear to the end of the tip of the puncture needle during puncture into a living body under observation with an ultrasonic diagnostic device An object of the present invention is to provide a medical puncture needle capable of obtaining a detection image.
超音波診断装置の画像により穿刺状態を観察しながら生体内に穿刺する穿刺針であって、
先端に刃先を有する管状の外筒針と、
前記外筒針の内部に挿入される内針と、
を備え、
前記外筒針は、
刃先近傍に設けられた平滑面を有する第１領域と、
前記第１領域の基端側に設けられた、凹加工の施された第２領域と、
を含む外周面を有し、
前記内針は、
先端から基端側へ所定距離にわたって粗し加工が施された領域
を含む外周面を有する、
ことを特徴とする穿刺針
が提供される。A puncture needle that punctures the living body while observing the puncture state with an image of an ultrasonic diagnostic apparatus,
A tubular outer needle having a cutting edge at the tip;
An inner needle inserted into the outer cylinder needle;
With
The outer cylinder needle is
A first region having a smooth surface provided in the vicinity of the cutting edge;
A second region that is provided with a recess on the base end side of the first region;
An outer peripheral surface including
The inner needle is
Having an outer peripheral surface including a region roughened over a predetermined distance from the distal end to the proximal end side,
A puncture needle is provided.
本発明の穿刺針は、生体内の特定の部位を狙って針先を穿刺する器具である。穿刺針の針先は、超音波装置の画像観察により把握される。ここで、超音波による画像観察は、被検出対象となる物質表面における超音波の乱反射をモニタすることにより行われる。このため、平滑表面を有する部分は、超音波による位置把握が困難であり、粗面とすることが望まれる。
一方、穿刺針の外筒面は、前述したとおり穿刺抵抗を低減することが望まれる。
そこで本発明は、内針に粗し加工を施すとともに、外筒針の表面に凹加工を施している。凹加工とは、表面に溝等の凹部を設ける加工をいい、凹加工を施した領域は、たとえば、凹部と平滑面が混在した形態となる。粗し加工とは、加工領域のほぼ全面にわたって凹凸付与等の粗面化処理を行う加工をいう。
本発明においては、外筒面に、刃の耐久性の観点から平滑面を有する第１領域を設けるとともに、穿刺抵抗低減の観点から凹加工の施された第２領域を設けている。そして、内針には、先端から基端側へ所定距離にわたって粗し加工が施された領域を設けている。すなわち、外筒針外周面の加工を最小限に抑えつつ内針に施した粗し加工によって針先の位置が把握できるようになっている。すなわち、外筒針外周の粗し加工は穿刺の抵抗となってしまうため最小限の加工密度とし、不足を内針の粗し加工で補う構成としている。The puncture needle of the present invention is an instrument that punctures a needle tip aiming at a specific site in a living body. The needle tip of the puncture needle is grasped by image observation of an ultrasonic device. Here, ultrasonic image observation is performed by monitoring irregular reflection of ultrasonic waves on the surface of a substance to be detected. For this reason, it is difficult for the portion having a smooth surface to grasp the position by the ultrasonic wave, and it is desired that the portion has a rough surface.
On the other hand, the outer cylinder surface of the puncture needle is desired to reduce puncture resistance as described above.
Therefore, in the present invention, the inner needle is roughened and the outer cylinder needle is concaved. Concave processing refers to processing in which a concave portion such as a groove is provided on the surface, and the region subjected to the concave processing has, for example, a form in which concave portions and smooth surfaces are mixed. Roughing refers to a process of performing a roughening process such as providing irregularities over almost the entire processing region.
In this invention, while providing the 1st area | region which has a smooth surface from a viewpoint of durability of a blade on the outer cylinder surface, the 2nd area | region where the concave process was given from a viewpoint of puncture resistance reduction is provided. The inner needle is provided with a roughened region over a predetermined distance from the distal end to the proximal end side. That is, the position of the needle tip can be grasped by roughening the inner needle while minimizing the processing of the outer peripheral surface of the outer cylinder needle. That is, since the roughening of the outer periphery of the outer cylinder needle becomes resistance to puncture, the minimum processing density is set, and the shortage is compensated by the roughening of the inner needle.
本発明の穿刺針において、先端を一致させて内針を外筒針に挿入した状態において、内針の粗し加工が施された領域の基端側端部が、外筒針の第２領域の基端側端部と一致するようにしてもよい。このようにすれば、外筒針の第２領域の基端側端部からの、内針粗し加工領域の突出状態を観察することで、内針の先端位置を把握することが可能となる。 In the puncture needle of the present invention, in a state where the distal end is aligned and the inner needle is inserted into the outer cylinder needle, the proximal end of the area where the inner needle is roughened is the base of the second area of the outer cylinder needle. You may make it correspond with an end side edge part. In this way, the distal end position of the inner needle can be grasped by observing the protruding state of the inner needle roughening region from the proximal end of the second region of the outer cylinder needle.
本発明によれば、超音波診断装置での観察下における生体内への穿刺において、穿刺針の刃先末端までより鮮明な超音波診断装置による反射波検出画像を得ることできる医療用の穿刺針を提供することができる。 According to the present invention, there is provided a medical puncture needle capable of obtaining a reflected wave detection image by an ultrasonic diagnostic apparatus that is clearer up to the distal end of the puncture needle in puncturing into a living body under observation with an ultrasonic diagnostic apparatus. Can be provided.
以下、本発明の実施の形態について、図面を用いて説明する。なお、すべての図面において、共通する構成要素には同一符号を付し、以下の説明において詳細な説明を適宜省略する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. In all the drawings, common constituent elements are denoted by the same reference numerals, and detailed description thereof will be appropriately omitted in the following description.
図１は、本実施形態に係る穿刺針の組み合わせた状態を示す図である。図中、左側が先端部で、右側が基端部である。 FIG. 1 is a diagram showing a combined state of the puncture needle according to the present embodiment. In the figure, the left side is the distal end and the right side is the proximal end.
図１に示すように、外筒針１０の先端側に刃１２が形成され斜めにカットされた刃先１１となっている。刃先１１より基端側に向かって外筒針の外周に凹加工部１３が施されている。また、内針２０が、外筒針内腔に挿入され組み合わされている。内針の先端は外筒針１０の斜めにカットされた刃先１１と同一面上になるようカットされた刃面２３を形成している。内針の外周は、先端から基端側に向かって粗し加工（不図示）が施されている。 As shown in FIG. 1, a blade 12 is formed on the distal end side of the outer cylindrical needle 10 to form a blade edge 11 that is cut obliquely. A concave portion 13 is provided on the outer periphery of the outer cylindrical needle toward the base end side from the blade edge 11. Further, the inner needle 20 is inserted and combined into the outer cylinder needle lumen. The tip of the inner needle forms a blade surface 23 that is cut so as to be flush with the cutting edge 11 of the outer cylinder needle 10 that is cut obliquely. The outer periphery of the inner needle is roughened (not shown) from the distal end toward the proximal end side.
以下、各部の構成について説明する。 Hereinafter, the configuration of each unit will be described.
外筒針１０は、生体内に穿刺できるよう先端に刃１２が形成された刃先１１を有している。そして、超音波診断装置で反射された超音波を検出できるよう外周に凹加工部１３が設けられている。凹加工部１３は、穿刺抵抗低減の観点から、エッジ等の凸部を含まないものが好ましい。また、過度な切削による穿刺針の強度低下や、生産性を考慮して凹部の深さ、密度等を決めることが好ましい。 The outer cylinder needle 10 has a cutting edge 11 having a blade 12 formed at the tip so that it can be punctured in a living body. And the recessed process part 13 is provided in the outer periphery so that the ultrasonic wave reflected with the ultrasonic diagnostic apparatus can be detected. The concave processed portion 13 preferably does not include a convex portion such as an edge from the viewpoint of reducing puncture resistance. In addition, it is preferable to determine the depth, density, and the like of the recesses in consideration of a decrease in strength of the puncture needle due to excessive cutting and productivity.
上記の条件を満たす外筒針１０の加工方法の例として、外筒針１０に硬質材を押し当てて凹加工部１３を形成する方法が挙げられる。本実施形態では加工の際に外筒針１０を長手軸中心に回転させ、螺旋状の凹溝を螺旋の巻き方向を変えて二重螺旋として構成している。螺旋状の凹溝は一条の螺旋に限定する必要は無く、二条、三条と加工を重ねてもよく、螺旋の巻き方向を変えて螺旋がクロスする二重螺旋などの複重螺旋とすることにより加工の密度を上げることが出来、より多くの超音波を超音波診断装置の検出部に反射することが出来るため好ましい。 As an example of the processing method of the outer cylinder needle 10 that satisfies the above conditions, there is a method in which a hard material is pressed against the outer cylinder needle 10 to form the recessed portion 13. In the present embodiment, the outer cylindrical needle 10 is rotated about the longitudinal axis during processing, and the spiral groove is configured as a double helix by changing the winding direction of the spiral. The spiral groove does not need to be limited to a single spiral, and may be overlapped with two or three strips. By changing the winding direction of the spiral, a double spiral such as a double spiral that crosses the spiral is used. It is preferable because the processing density can be increased and more ultrasonic waves can be reflected to the detection unit of the ultrasonic diagnostic apparatus.
凹溝の断面形状は様々な角度からの超音波診断装置による観察にも対応できるよう、略半円状の凹溝であることが望ましい。これにより、如何なる角度からの超音波であっても超音波診断装置の検出部へ反射する超音波を得ることが出来る。
更にはこれらの加工後に、加工による不要な凸部やエッジ、バリなどを除去する仕上げ加工を施すことは、穿刺抵抗を低減するためより好ましい。The cross-sectional shape of the concave groove is preferably a substantially semicircular concave groove so as to be compatible with observation by an ultrasonic diagnostic apparatus from various angles. Thereby, it is possible to obtain an ultrasonic wave reflected from the detection unit of the ultrasonic diagnostic apparatus regardless of the angle of the ultrasonic wave.
Furthermore, after these processes, it is more preferable to perform a finishing process to remove unnecessary convex portions, edges, burrs, and the like due to the process, in order to reduce puncture resistance.
外筒針１０への凹加工部１３は、穿刺針の刃先から所定距離隔てて位置から基端側に向かって行う。凹加工の開始位置は、刃先１１より基端側にあればよい。また、凹加工部１３の領域は、使用する穿刺針の外筒針の長さによって決めればよい。例えば、一般的な全長２００ｍｍ程度の穿刺針であれば、刃先１１から、２ｍｍ以上１０ｍｍ以下が好ましい。このようにすれば、刃先の破損を有効に防止することができる。また凹加工の長さは、１０ｍｍ以上１００ｍｍ以下が好ましい。こうすることにより、穿刺の際の抵抗を抑えつつ、反射波を充分に映像としてとらえることができる。 The concave processing portion 13 to the outer cylinder needle 10 is performed from the position toward the proximal end side at a predetermined distance from the cutting edge of the puncture needle. The start position of the concave machining may be on the proximal end side with respect to the cutting edge 11. Further, the area of the recessed processing portion 13 may be determined by the length of the outer cylinder needle of the puncture needle to be used. For example, in the case of a general puncture needle having a total length of about 200 mm, it is preferably 2 mm or more and 10 mm or less from the blade edge 11. In this way, breakage of the blade edge can be effectively prevented. The length of the concave processing is preferably 10 mm or more and 100 mm or less. By doing so, the reflected wave can be sufficiently captured as an image while suppressing resistance during puncturing.
図１に示すように、先端を一致させて内針２０を外筒針１０に挿入した状態において内針２０の粗し加工部２２の基端側端部は、外筒針１０のの凹加工部１３の基端側端部と一致している。すなわち、内針２０は、先端の刃先２１から外筒針１０と組合わせた際に外筒針１０の外周面の凹加工部１３と重なる位置までの外周に粗し加工部２２が施されている。内針２０の刃先２１は生体組織を切り進む針の刃としての機能は形成していないため、刃先２１の先端までの外周に粗し加工部２２を施すことが可能である。粗し加工方法は特に限定はされないが、例えばサンドブラスト加工で施すことが好ましい。サンドブラスト加工は、加工密度が非常に高く、細い内針２０の外周を隙間なく凹凸加工することに適している。 As shown in FIG. 1, when the inner needle 20 is inserted into the outer cylinder needle 10 with the distal ends aligned, the proximal end of the roughened portion 22 of the inner needle 20 is the recessed portion 13 of the outer cylinder needle 10. Is coincident with the proximal end of the. That is, the inner needle 20 is provided with a roughened processing portion 22 on the outer periphery from the cutting edge 21 at the tip to the position where the outer peripheral surface of the outer cylindrical needle 10 overlaps the concave processing portion 13 when combined with the outer cylindrical needle 10. Since the cutting edge 21 of the inner needle 20 does not form a function as a cutting edge of a needle that cuts through a living tissue, it is possible to roughen the outer periphery up to the tip of the cutting edge 21. The roughening method is not particularly limited, but for example, it is preferably performed by sandblasting. Sandblasting has a very high processing density and is suitable for uneven processing of the outer periphery of the thin inner needle 20 without a gap.
内針２０は、針の刃１２を形成しないが、刃面２３は穿刺の際に生体組織に接触するため、刃面２３にサンドブラスト加工が施されていると穿刺の際の抵抗となってしまうため好ましくない。そのため、刃面２３の加工をサンドブラスト加工の後に実施することが好ましい。内針２０の外周は、刃面２３を除いては外筒針１０内に収納されているので、穿刺の際の抵抗とならないため、サンドブラスト加工後のエッジ除去などの仕上げ加工は不要であり、逆に仕上げ加工を施してしまうと、折角の超音波の反射面が減ってしまうことになるので仕上げ加工を行わないことが好ましい。 The inner needle 20 does not form the needle blade 12, but the blade surface 23 comes into contact with the living tissue during puncturing, and therefore, when the blade surface 23 is sandblasted, it becomes resistance during puncturing. Therefore, it is not preferable. Therefore, it is preferable to perform the processing of the blade surface 23 after the sandblasting. Since the outer circumference of the inner needle 20 is housed in the outer cylinder needle 10 except for the blade surface 23, there is no resistance during puncturing, so finishing processing such as edge removal after sandblasting is not necessary. If the finishing process is performed, it is preferable that the finishing process is not performed because the reflection surface of the ultrasonic wave at the corner is reduced.
次に、外筒針１０と内針２０を組合わせた状態に対して、外筒針１０の外周の二重螺旋加工では、未加工の滑らかな外周面が残っていることになり、超音波を超音波診断装置の検出部に反射し得ない部位が残されており超音波診断装置での検出効率が低いこととなる。これを補うために、本例では内針２０の粗し加工部２２を外筒針１０と組合わせた際に外筒針１０の凹加工部１３と重なる位置までの範囲に施している。これにより、粗し加工部２２が外筒針１０の凹加工部１３の隙間を補うこととなり、外筒針１０と内針２０を組合わせての超音波診断装置での検出が可能となる。内針２０の粗し加工部２２は、上記のように超音波の反射強度を補う役割を果たすことから、加工密度の高い加工方法が望ましい。 Next, in the double spiral processing of the outer periphery of the outer cylinder needle 10 with respect to the state where the outer cylinder needle 10 and the inner needle 20 are combined, an unprocessed smooth outer peripheral surface remains, so A portion that cannot be reflected remains in the detection unit of the ultrasonic diagnostic apparatus, and the detection efficiency of the ultrasonic diagnostic apparatus is low. In order to compensate for this, in this example, when the roughened portion 22 of the inner needle 20 is combined with the outer cylindrical needle 10, it is applied to a range up to a position where it overlaps with the recessed portion 13 of the outer cylindrical needle 10. As a result, the roughening portion 22 compensates for the gap between the concave portion 13 of the outer cylinder needle 10 and detection by the ultrasonic diagnostic apparatus combining the outer cylinder needle 10 and the inner needle 20 becomes possible. Since the roughening portion 22 of the inner needle 20 plays a role of supplementing the reflection intensity of ultrasonic waves as described above, a processing method having a high processing density is desirable.
また、外筒針１０の外周で未加工である刃先１１は、内針２０外周に粗し加工部２２を施しているため、超音波診断装置による刃先２１の検出も可能となる。
尚、本実施例では外筒針１０に生産性の面から二重螺旋状の凹加工部１３を施しているが、穿刺の際の抵抗となる凸部やエッジがない加工方法であれば何ら問題なく、例えば一定間隔のリング状の凹溝を複数設ける方法でもよいが、サンドブラスト加工のようにヤスリ状になり加工のバリやエッジを除去する加工手段も取れない加工方法は、穿刺の際の抵抗の面から好ましくない。Further, since the cutting edge 11 which is not processed on the outer periphery of the outer cylindrical needle 10 is roughened on the outer periphery of the inner needle 20, the cutting edge 21 can be detected by the ultrasonic diagnostic apparatus.
In the present embodiment, the outer cylindrical needle 10 is provided with a double spiral concave processing portion 13 from the viewpoint of productivity. However, there is no problem as long as the processing method does not have a convex portion or an edge that becomes resistance during puncturing. For example, a method of providing a plurality of ring-shaped concave grooves at regular intervals may be used, but a processing method such as sandblasting that does not have a processing means for removing processing burrs and edges is a resistance to puncture. This is not preferable.
同じく内針２０の粗し加工部２２についても、加工密度と生産性の面からサンドブラスト加工を施しているが、刃先２１までの加工が可能であることと加工密度が高いことを満たす加工方法であれば何ら問題はなく、例えばローレットや旋盤でのヤスリ加工などでもよく特に限定するものではない。
凹加工部１３、粗し加工部２２を施す穿刺針長手方向の寸法は、超音波診断装置の画像から術者が穿刺のルートを確認しやすいように最低でも１０ｍｍであることが望ましく、３０ｍｍ程度が好ましいが穿刺の目的に応じて決めればよく、また生産性も考慮することが更に好ましい。Similarly, the roughened portion 22 of the inner needle 20 is also subjected to sandblasting from the viewpoint of processing density and productivity, but with a processing method that allows processing up to the cutting edge 21 and high processing density. There is no problem as long as there is any problem, and for example, a knurling or lathe file may be used, and there is no particular limitation.
The dimension in the longitudinal direction of the puncture needle to which the concave processing portion 13 and the roughening processing portion 22 are applied is preferably at least 10 mm so that the operator can easily confirm the puncture route from the image of the ultrasonic diagnostic apparatus, and is about 30 mm. However, it may be determined according to the purpose of puncture, and it is more preferable to consider productivity.
以下、本実施形態に係る穿刺針の効果について説明する。
本実施形態では、外筒針１０の刃先１１よりも基端側に基端側に向かって外筒針１０の外周に凹加工が施され、さらに、内針２０の先端の刃先２１から基端側に向かって粗し加工が施されている。
このため、外筒針１０の外周面の加工を最小限に抑えつつ、内針２０に施した粗し加工によって針先の位置が把握できるようになっている。
外筒針１０に設けられた加工は、凹加工部１３のため、生体内への穿刺の際抵抗なく穿刺することが可能となる。また、内針２０に施されている粗し加工部２２の領域が、外筒針１０の凹加工部１３の領域をほぼ含んでいるため、外筒針１０の、凹加工部１３のなされていない部分を内針２０の粗し加工部２２で反射波を映像としてとらえることが可能となる。さらに、外筒針の外周面に凹加工が施されているため、内針の粗し加工だけでは不足する反射波を強くすることができる。また、内針を抜いた後でも外筒針の位置が解るようにすることができる。Hereinafter, the effect of the puncture needle according to the present embodiment will be described.
In the present embodiment, the outer periphery of the outer cylindrical needle 10 is recessed toward the proximal side on the proximal side from the cutting edge 11 of the outer cylindrical needle 10, and further, from the cutting edge 21 at the distal end of the inner needle 20 to the proximal side. Roughening is applied.
For this reason, the position of the needle tip can be grasped by roughening the inner needle 20 while minimizing the processing of the outer peripheral surface of the outer cylindrical needle 10.
Since the processing provided in the outer cylinder needle 10 is the concave processing portion 13, it is possible to puncture without resistance when puncturing the living body. Further, since the area of the roughened portion 22 applied to the inner needle 20 substantially includes the area of the recessed portion 13 of the outer cylinder needle 10, the portion of the outer cylinder needle 10 where the recessed portion 13 is not formed. The reflected wave can be captured as an image by the roughening portion 22 of the inner needle 20. Furthermore, since the outer peripheral surface of the outer cylinder needle is recessed, it is possible to intensify the reflected wave that is insufficient only by roughening the inner needle. Further, the position of the outer cylinder needle can be understood even after the inner needle is pulled out.
以上、本発明の穿刺針について実施形態に基づいて説明した。これらの実施形態はあくまでも例示であり特に限定されるものではない。例えば、先端側は直線上の穿刺針の代わりに先端側が内側に湾曲したような穿刺針であってもかまわない。 The puncture needle of the present invention has been described based on the embodiments. These embodiments are merely examples and are not particularly limited. For example, the tip side may be a puncture needle whose tip side is curved inward instead of a straight puncture needle.
本発明の穿刺針は、生体内への穿刺の際の穿刺針のより鮮明な超音波診断装置による検出画像を得られ、且つ刃先まで検出可能なため、生体内への穿刺をより安全に行うことが出来、医療分野において幅広く適用できる。 The puncture needle of the present invention can obtain a sharper detection image of the puncture needle at the time of puncture into the living body and can detect even the blade tip, so that the puncture into the living body can be performed more safely. Can be widely applied in the medical field.
１０ 外筒針
１１ 刃先
１２ 刃
１３ 凹加工部
２０ 内針
２１ 刃先
２２ 粗し加工部
２３ 刃面DESCRIPTION OF SYMBOLS 10 Outer cylinder needle 11 Cutting edge 12 Blade 13 Concave processing part 20 Inner needle 21 Cutting edge 22 Roughening processing part 23 Blade surface
| Application Number | Priority Date | Filing Date | Title |
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| JP2004288851AJP4552582B2 (en) | 2004-09-30 | 2004-09-30 | Puncture needle |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004288851AJP4552582B2 (en) | 2004-09-30 | 2004-09-30 | Puncture needle |
| Publication Number | Publication Date |
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| JP2006101915A JP2006101915A (en) | 2006-04-20 |
| JP4552582B2true JP4552582B2 (en) | 2010-09-29 |
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| JP2004288851AExpired - Fee RelatedJP4552582B2 (en) | 2004-09-30 | 2004-09-30 | Puncture needle |
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