JP2009183441A

Movatterモバイル変換

Info

Publication number: JP2009183441A
Application number: JP2008026139A
Authority: JP
Inventors: Ken Kondo; 乾近藤
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-02-06
Filing date: 2008-02-06
Publication date: 2009-08-20

Abstract

<P>PROBLEM TO BE SOLVED: To provide an intravenous needle assembly capable of reliably and easily indwell an end part of an indwelling needle at an appropriate position in a blood vessel and improving rate of success of blood vessel security. <P>SOLUTION: The intravenous needle assembly 21 includes an indwelling needle unit 5 which is equipped with an indwelling needle 3 at the end of a sheath body 2 and has a flange 4 formed at a rear end outer periphery part of the sheath body 2 and a biopsy needle unit 23 equipped with a biopsy needle 7 at an inner tube 22a at the end of a cylindrical body 22. When a rear end part of a plate spring 24 whose central part is bent in a projection shape is fixed on the outer periphery part of the cylinder body 22 and the biopsy needle unit 23 is assembled into the indwelling needle unit 5, a front end of the plate spring 24 is disposed so that abuts on or approaches the rear end of the flange 4. When the end part of the biopsy needle 7 is inserted into a blood vessel 41, a projection part 24a of the plate spring 24 is pressed against the cylinder part 22 while holding the biopsy needle unit 23, and the plate spring 24 is extended, the plate spring 24 pushes the flange 4 to advance the indwelling needle unit 5 and the end part of the indwelling part 3 advances by a prescribed length in the blood bessel 41. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

Translated fromJapanese

本発明は、留置針の先端部を確実、且つ、容易に血管内の適正位置に留置させ、血管確保の成功率を向上させることができる静脈留置針組立体に関する。 The present invention relates to a vein indwelling needle assembly that can reliably and easily place a distal end portion of an indwelling needle at an appropriate position in a blood vessel and improve a success rate of securing a blood vessel.

この種従来の静脈留置針組立体の一例として、例えば、図３に示すような静脈留置針組立体１があり、静脈留置針組立体１は、外筒体２先端に留置針３を備え、外筒体２後端外周部にフランジ４が形成された留置針ユニット５と、外筒体２に嵌挿自在の内筒部６ａが筒状体６先端部に形成され、内筒部６ａ先端に穿刺針７を備え、筒状体６後端に蓋体８が嵌挿された穿刺針ユニット９とを具備し、穿刺針ユニット９が留置針ユニット５に組み込まれる時、穿刺針７の先端部は留置針３内を貫通して留置針３先端から所定長さ突設し、内筒部６ａは外筒体２内に嵌挿されるように形成されている。 As an example of this type of conventional vein indwelling needle assembly, for example, there is a vein indwelling needle assembly 1 as shown in FIG. 3, and the vein indwelling needle assembly 1 includes anindwelling needle 3 at the distal end of the outercylindrical body 2. An indwellingneedle unit 5 in which aflange 4 is formed on the outer peripheral portion of the rear end of the outercylindrical body 2 and an innercylindrical portion 6a that can be fitted into the outercylindrical body 2 are formed at the distal end of thecylindrical body 6, and the distal end of the innercylindrical portion 6a. Apuncture needle 7, and a puncture needle unit 9 having alid 8 fitted into the rear end of thecylindrical body 6. When the puncture needle unit 9 is incorporated into the indwellingneedle unit 5, the tip of thepuncture needle 7 is provided. The portion penetrates theindwelling needle 3 and protrudes a predetermined length from the tip of the indwellingneedle 3, and theinner cylinder part 6 a is formed so as to be fitted into theouter cylinder 2.

そして、前記静脈留置針組立体１を用いて、留置針３の先端部を血管内に留置させる場合、穿刺針ユニット９が留置針ユニット５に組み込まれた状態で、穿刺針７先端部が血管内に挿入され、同時に留置針３の先端部も血管内に挿入されるが、留置針３の先端部は、穿刺針７の先端部よりも挿入が浅くなるため、穿刺針７を引き抜く前に、留置針３の先端部を穿刺針７の先端位置近傍まで推進させる必要がある。
この推進させる操作は、従来、操作者の手技により行なわれているが、その操作が極めて難しく、推進が少ないと、留置針３の先端部の挿入が浅くなり、留置針３の先端部が血管から抜けてしまう虞があり、推進し過ぎると、留置針３の先端部で血管を傷つけたり、留置針３の先端部が血管を突き抜ける虞がある。When the distal end portion of the indwellingneedle 3 is placed in the blood vessel using the vein indwelling needle assembly 1, the distal end portion of thepuncture needle 7 is placed in the blood vessel while the puncture needle unit 9 is incorporated in the indwellingneedle unit 5. At the same time, the distal end portion of the indwellingneedle 3 is also inserted into the blood vessel. However, since the distal end portion of the indwellingneedle 3 is shallower than the distal end portion of thepuncture needle 7, before thepuncture needle 7 is pulled out, It is necessary to propel the distal end portion of the indwellingneedle 3 to the vicinity of the distal end position of thepuncture needle 7.
This propulsion operation is conventionally performed by an operator's technique. However, the operation is extremely difficult, and if the propulsion is small, the insertion of the distal end portion of the indwellingneedle 3 becomes shallow, and the distal end portion of the indwellingneedle 3 becomes a blood vessel. If it is pushed too far, the blood vessel may be damaged at the distal end portion of the indwellingneedle 3, or the distal end portion of the indwellingneedle 3 may penetrate the blood vessel.

尚、静脈留置針の先行文献としては、例えば、特許文献１があり、特許文献１は、内針の血液逆流流入口を内針内腔以外に外針先端により近い部位、或いは、外針先端の後方に更に一つ設けて２つにして血液逆流を迅速に視認できるようにし、外針先端を静脈腔内の適切な位置に容易に残置させることができるようにするものである。
特開平６−８６８１４号公報For example, Patent Literature 1 is a prior art document of a vein indwelling needle. Patent Literature 1 describes a region where the blood backflow inlet of the inner needle is closer to the outer needle tip than the inner needle lumen, or the outer needle tip. One further is provided behind the two so that the blood backflow can be quickly visually recognized, and the tip of the outer needle can be easily left at an appropriate position in the venous cavity.
JP-A-6-86814

前述したように、従来の静脈留置針組立体の操作に於いて、血管内に挿入された留置針の先端部を適正位置まで推進させる操作は、操作が難しく、熟練を要するものであった。
尚、特許文献１は、血管内に挿入された留置針の先端部を適正位置まで推進させる操作に関するものではない。As described above, in the operation of the conventional vein indwelling needle assembly, the operation of pushing the distal end portion of the indwelling needle inserted into the blood vessel to an appropriate position is difficult and requires skill.
Patent Document 1 does not relate to an operation for propelling the distal end portion of an indwelling needle inserted into a blood vessel to an appropriate position.

以上の現状に鑑み、本発明は、穿刺針の先端部が血管内に挿入された時、留置針の先端部を確実、且つ、容易に血管内の適正位置に留置させ、血管確保の成功率を向上させることができる静脈留置針組立体を提供することを目的とする。 In view of the above situation, the present invention ensures that when the tip of the puncture needle is inserted into the blood vessel, the tip of the indwelling needle is reliably and easily placed at an appropriate position in the blood vessel, and the success rate of securing the blood vessel. It is an object of the present invention to provide a vein indwelling needle assembly capable of improving the above.

上記の課題を解決すべく、本発明は以下の構成を提供する。
請求項１に係る発明は、外筒体先端に留置針を備え、外筒体後端外周部にフランジが形成された留置針ユニットと、前記外筒体に嵌挿自在の内筒部が筒状体先端部に形成され、前記内筒部先端に穿刺針を備え、前記筒状体後端に蓋体が嵌挿された穿刺針ユニットとを具備し、前記穿刺針ユニットが前記留置針ユニットに組み込まれる時、前記穿刺針は先端部が前記留置針内を貫通して前記留置針先端から所定長さ突設し、前記内筒部は前記外筒体に嵌挿されるように形成された静脈留置針組立体であって、
前記筒状体外周部に、中央部が凸状に折曲された板バネの後端部を固着し、且つ、前記穿刺針ユニットが前記留置針ユニットに組み込まれた時、前記板バネの前端が前記フランジ後端に当接又は近接するように配設し、
前記穿刺針ユニットが前記留置針ユニットに組み込まれ、前記穿刺針の先端部が血管内に挿入された時、前記穿刺針ユニットを保持したまま前記板バネの凸状部を前記筒状体に押し付けて前記板バネを伸張させると、前記板バネが前記フランジを押して前記留置針ユニットを前進させ、前記留置針の先端部が前記穿刺針の案内により血管内を所定長さ推進するように構成されたことを特徴とする静脈留置針組立体を提供するものである。In order to solve the above problems, the present invention provides the following configurations.
According to the first aspect of the present invention, there is provided an indwelling needle unit having an indwelling needle at the distal end of the outer cylinder, and a flange formed on the outer peripheral portion of the rear end of the outer cylinder, and an inner cylinder portion that can be fitted into the outer cylinder. A puncture needle unit that is formed at the distal end of the cylindrical body, has a puncture needle at the distal end of the inner cylinder, and has a lid inserted into the rear end of the cylindrical body, and the puncture needle unit is the indwelling needle unit The puncture needle is formed so that the distal end of the puncture needle penetrates through the indwelling needle and protrudes a predetermined length from the distal end of the indwelling needle, and the inner cylinder is fitted into the outer cylinder. A venous indwelling needle assembly comprising:
When the rear end portion of the leaf spring whose central portion is bent in a convex shape is fixed to the outer peripheral portion of the cylindrical body, and when the puncture needle unit is incorporated in the indwelling needle unit, the front end of the leaf spring Is arranged so as to contact or be close to the rear end of the flange,
When the puncture needle unit is incorporated in the indwelling needle unit and the distal end portion of the puncture needle is inserted into a blood vessel, the convex portion of the leaf spring is pressed against the tubular body while holding the puncture needle unit. When the leaf spring is extended, the leaf spring pushes the flange to advance the indwelling needle unit, and the distal end portion of the indwelling needle is propelled for a predetermined length in the blood vessel by the guidance of the puncture needle. A venous indwelling needle assembly is provided.

本発明の請求項１記載の発明によれば、留置針の先端部を確実、且つ、容易に血管内の適正位置に留置させ、血管確保の成功率を向上させることができる静脈留置針組立体を提供することができる。 According to the invention described in claim 1 of the present invention, a vein indwelling needle assembly that can reliably and easily place the distal end of the indwelling needle at an appropriate position in the blood vessel and improve the success rate of securing the blood vessel. Can be provided.

以下、実施例を示した図面を参照しつつ本発明の実施の形態を説明する。尚、説明の都合上、従来例と同一構成部分については同一符号を付してその説明を省略する。
図１（ａ）に於いて、２１は、本発明の静脈留置針組立体を示し、静脈留置針組立体２１は、従来例の静脈留置針組立体（図３に於いて１）と同様に、図１（ａ）及び（ｂ）に示すように、外筒体２先端に留置針３を備え、外筒体２後端外周部にフランジ４が形成された留置針ユニット５と、外筒体２に嵌挿自在の内筒部２２ａが筒状体２２先端部に形成され、内筒部２２ａ先端に穿刺針７を備え、筒状体２２後端に蓋体８が嵌挿された穿刺針ユニット２３とを具備する。
尚、前記留置針３と外筒体２は中心部が連通し、前記穿刺針７と内筒部２２ａと筒状体２２も中心部が連通するように構成される。
そして、穿刺針ユニット２３が留置針ユニット５に組み込まれる時、穿刺針７は先端部が留置針３内を貫通して留置針３先端から所定長さ突設し、内筒部２２ａは外筒体２に嵌挿されるように形成されている。
尚、前記留置針ユニット５と、穿刺針ユニット２３の内筒部２２ａ、筒状体２２及び蓋体８は、プラスチックで形成され、穿刺針７は、金属で形成されている。Hereinafter, embodiments of the present invention will be described with reference to the drawings showing examples. For convenience of explanation, the same components as those in the conventional example are denoted by the same reference numerals, and description thereof is omitted.
In FIG. 1A,reference numeral 21 denotes a vein indwelling needle assembly of the present invention. The vein indwellingneedle assembly 21 is similar to the conventional vein indwelling needle assembly (1 in FIG. 3). 1 (a) and 1 (b), an indwellingneedle unit 5 having anindwelling needle 3 at the distal end of theouter cylinder 2 and aflange 4 formed on the outer peripheral portion of the rear end of theouter cylinder 2, and an outer cylinder A puncture in which an innercylindrical portion 22a that can be inserted into thebody 2 is formed at the distal end of thecylindrical body 22, thepuncture needle 7 is provided at the distal end of the innercylindrical portion 22a, and thelid body 8 is inserted into the rear end of thecylindrical body 22.Needle unit 23 is provided.
The indwellingneedle 3 and theouter cylinder 2 communicate with each other at the center, and thepuncture needle 7, theinner cylinder 22a and thecylinder 22 communicate with each other at the center.
When thepuncture needle unit 23 is incorporated in the indwellingneedle unit 5, the tip of thepuncture needle 7 penetrates the indwellingneedle 3 and protrudes from the tip of the indwellingneedle 3 to a predetermined length, and theinner cylinder portion 22a is the outer cylinder. It is formed so as to be fitted into thebody 2.
The indwellingneedle unit 5 and theinner cylinder portion 22a, thecylindrical body 22 and thelid body 8 of thepuncture needle unit 23 are made of plastic, and thepuncture needle 7 is made of metal.

更に、本発明の静脈留置針組立体２１は、従来例の静脈留置針組立体（図３に於いて１）に加え、筒状体２２外周部に、中央部が凸状に折曲された細長い板バネ２４が後端部を固着されて設けられ、板バネ２４は、穿刺針ユニット２３が留置針ユニット５に組み込まれた時、板バネ２４の前端がフランジ４後端に当接又は近接するように配設される。
前記板バネ２４は、弾性を有する合成樹脂、ゴム、金属板等で作成される。Furthermore, the vein indwellingneedle assembly 21 of the present invention has a central portion bent into a convex shape on the outer peripheral portion of thecylindrical body 22 in addition to the vein indwelling needle assembly of the conventional example (1 in FIG. 3). Anelongated leaf spring 24 is provided with its rear end fixed, and theleaf spring 24 is configured such that when thepuncture needle unit 23 is incorporated in the indwellingneedle unit 5, the front end of theleaf spring 24 abuts or is close to the rear end of theflange 4. Is arranged.
Theleaf spring 24 is made of elastic synthetic resin, rubber, metal plate or the like.

そして、穿刺針ユニット２３が留置針ユニット５に組み込まれ、穿刺針７の先端部が血管内に挿入された時、留置針３の先端部も血管内に挿入され、図１（ｃ）に示すように、穿刺針ユニット２３を保持したまま板バネ２４の凸状部２４ａを筒状体２２に矢印Ａの如く押し付けて板バネ２４を伸張させると、板バネ２４がフランジ４を押して矢印Ｂの如く留置針ユニット５を前進させ、留置針３の先端部が穿刺針７の案内により血管内を所定長さ推進するように構成されている。 When thepuncture needle unit 23 is incorporated in the indwellingneedle unit 5 and the distal end portion of thepuncture needle 7 is inserted into the blood vessel, the distal end portion of the indwellingneedle 3 is also inserted into the blood vessel, as shown in FIG. As described above, when the bulgingneedle unit 23 is held and theconvex portion 24a of theleaf spring 24 is pressed against thecylindrical body 22 as indicated by the arrow A to extend theleaf spring 24, theleaf spring 24 pushes theflange 4 and the arrow B Thus, the indwellingneedle unit 5 is moved forward, and the distal end portion of the indwellingneedle 3 is configured to propel the inside of the blood vessel by a predetermined length by the guidance of thepuncture needle 7.

而して、本発明の静脈留置針組立体２１の使用方法を説明すると、先ず、穿刺針ユニット２３の穿刺針７先端部を留置針３内を貫通させて留置針３先端から所定長さ突設させ、内筒部２２ａを外筒体２内に嵌挿すれば、穿刺針ユニット２３が留置針ユニット５に組み込まれる。
そして、穿刺針ユニット２３が留置針ユニット５に組み込まれた状態で、図２（ａ）に示す如く、穿刺針７の先端部を血管４１内に挿入し、図２（ｂ）に示す如く、穿刺針ユニット２３を保持したまま板バネ２４の凸状部２４ａを矢印Ａの如く筒状体２２に押し付けて板バネ２４を伸張させると、板バネ２４がフランジ４を押して矢印Ｂの如く留置針ユニット５を前進させ、留置針３の先端部が穿刺針７の案内により血管４１内を所定長さ推進する。これにより、留置針３の先端は、穿刺針７の先端とほぼ同じ位置になり、血管４１内の適正な位置に位置決めされ、留置針３による血管確保が成功する。尚、前記所定長さとは、板バネ２４の凸状部２４ａの押し付けによって生じる板バネ２４の伸縮差によって設定される長さであるが、仮に、凸状部２４ａを押し付ける力を減じた場合は、その減力に応じてその長さが減少する。Thus, a method of using the vein indwellingneedle assembly 21 of the present invention will be described. First, the tip of thepuncture needle 7 of thepuncture needle unit 23 is penetrated through the indwellingneedle 3 and protrudes a predetermined length from the tip of the indwellingneedle 3. When theinner cylinder portion 22a is fitted and inserted into theouter cylinder body 2, thepuncture needle unit 23 is incorporated into the indwellingneedle unit 5.
Then, with thepuncture needle unit 23 incorporated in the indwellingneedle unit 5, as shown in FIG. 2 (a), the distal end portion of thepuncture needle 7 is inserted into theblood vessel 41, and as shown in FIG. 2 (b), When theconvex portion 24a of theleaf spring 24 is pressed against thecylindrical body 22 as shown by the arrow A while thepuncture needle unit 23 is held, theleaf spring 24 is extended, and theleaf spring 24 pushes theflange 4 to move the indwelling needle as shown by the arrow B. Theunit 5 is advanced, and the distal end portion of the indwellingneedle 3 propels the inside of theblood vessel 41 by a predetermined length by the guidance of thepuncture needle 7. As a result, the distal end of the indwellingneedle 3 becomes substantially the same position as the distal end of thepuncture needle 7 and is positioned at an appropriate position in theblood vessel 41, and the blood vessel securing by the indwellingneedle 3 is successful. The predetermined length is a length set by a difference in expansion and contraction of theleaf spring 24 caused by the pressing of theconvex portion 24a of theleaf spring 24. However, if the force pressing theconvex portion 24a is reduced, The length decreases according to the reduction.

次に、図２（ｃ）に示すように、留置針ユニット５を人体に固定した状態で、矢印Ｃの如く穿刺針ユニット２３を留置針ユニット５から抜き取ると、留置針３の先端部が血管４１内に留置された状態で、留置針ユニット５が人体４２に保持される。 Next, as shown in FIG. 2 (c), when thepuncture needle unit 23 is removed from the indwellingneedle unit 5 as indicated by the arrow C with the indwellingneedle unit 5 fixed to the human body, the distal end of the indwellingneedle 3 becomes a blood vessel. The indwellingneedle unit 5 is held by thehuman body 42 in a state where it is indwelled in thebody 41.

（ａ）本発明による静脈留置針組立体の正面図である。（ｂ）本発明による静脈留置針組立体の組み立て前の状態を示す正面図である。（ｃ）本発明による静脈留置針組立体の留置針ユニットを推進させた状態を示す正面図である。(A) It is a front view of the vein indwelling needle assembly by this invention. (B) It is a front view which shows the state before the assembly of the vein indwelling needle assembly by this invention. (C) It is a front view which shows the state which pushed the indwelling needle unit of the vein indwelling needle assembly by this invention.（ａ）本発明による静脈留置針組立体の穿刺針の先端部と留置針の先端部を血管内に挿入した状態を示す正面縦断面図である。（ｂ）本発明による静脈留置針組立体の留置針を推進させた状態を示す正面縦断面図である。（ｃ）本発明による静脈留置針組立体の留置針ユニットを留置させ、穿刺針ユニットを取外した状態を示す正面縦断面図である。(A) It is a front longitudinal cross-sectional view which shows the state which inserted the front-end | tip part of the puncture needle of the vein indwelling needle assembly by this invention, and the front-end | tip part of an indwelling needle in the blood vessel. (B) It is a front longitudinal cross-sectional view which shows the state which pushed the indwelling needle of the vein indwelling needle assembly by this invention. (C) It is a front longitudinal cross-sectional view which shows the state which indwelled the indwelling needle unit of the vein indwelling needle assembly by this invention, and removed the puncture needle unit.（ａ）従来例の静脈留置針組立体の正面図である。（ｂ）従来例の静脈留置針組立体の穿刺針ユニットの正面図である。（ｃ）従来例の静脈留置針組立体の留置針ユニットの正面図である。(A) It is a front view of the vein indwelling needle assembly of a prior art example. (B) It is a front view of the puncture needle unit of the vein indwelling needle assembly of a prior art example. (C) It is a front view of the indwelling needle unit of the vein indwelling needle assembly of a prior art example.

符号の説明Explanation of symbols

２外筒体
３留置針
４フランジ
５留置針ユニット
７穿刺針
８蓋体
２１静脈留置針組立体
２２筒状体
２３穿刺針ユニット
２４板バネ
２４ａ凸状部
４１血管2Outer cylinder 3Indwelling needle 4Flange 5Indwelling needle unit 7Puncture needle 8Lid 21 Venousindwelling needle assembly 22Tubular body 23Puncture needle unit 24Leaf spring24a Convex part 41 Blood vessel

Claims

Translated fromJapanese

外筒体先端に留置針を備え、外筒体後端外周部にフランジが形成された留置針ユニットと、前記外筒体に嵌挿自在の内筒部が筒状体先端部に形成され、前記内筒部先端に穿刺針を備え、前記筒状体後端に蓋体が嵌挿された穿刺針ユニットとを具備し、前記穿刺針ユニットが前記留置針ユニットに組み込まれる時、前記穿刺針は先端部が前記留置針内を貫通して前記留置針先端から所定長さ突設し、前記内筒部は前記外筒体に嵌挿されるように形成された静脈留置針組立体であって、
前記筒状体外周部に、中央部が凸状に折曲された板バネの後端部を固着し、且つ、前記穿刺針ユニットが前記留置針ユニットに組み込まれた時、前記板バネの前端が前記フランジ後端に当接又は近接するように配設し、
前記穿刺針ユニットが前記留置針ユニットに組み込まれ、前記穿刺針の先端部が血管内に挿入された時、前記穿刺針ユニットを保持したまま前記板バネの凸状部を前記筒状体に押し付けて前記板バネを伸張させると、前記板バネが前記フランジを押して前記留置針ユニットを前進させ、前記留置針の先端部が前記穿刺針の案内により血管内を所定長さ推進するように構成されたことを特徴とする静脈留置針組立体。An indwelling needle unit provided with an indwelling needle at the outer cylinder front end, and a flange formed on the outer periphery of the rear end of the outer cylinder, and an inner cylinder part that can be inserted into the outer cylinder are formed at the front end of the cylindrical body, A puncture needle unit having a puncture needle at the distal end of the inner cylinder portion and a lid inserted into the rear end of the cylindrical body, and when the puncture needle unit is incorporated into the indwelling needle unit, the puncture needle Is a vein indwelling needle assembly formed such that a distal end portion penetrates the indwelling needle and protrudes from the distal end of the indwelling needle by a predetermined length, and the inner tubular portion is inserted into the outer tubular body. ,
When the rear end portion of the leaf spring whose central portion is bent in a convex shape is fixed to the outer peripheral portion of the cylindrical body, and when the puncture needle unit is incorporated in the indwelling needle unit, the front end of the leaf spring Is arranged so as to contact or be close to the rear end of the flange,
When the puncture needle unit is incorporated in the indwelling needle unit and the distal end portion of the puncture needle is inserted into a blood vessel, the convex portion of the leaf spring is pressed against the tubular body while holding the puncture needle unit. When the leaf spring is extended, the leaf spring pushes the flange to advance the indwelling needle unit, and the distal end portion of the indwelling needle is propelled for a predetermined length in the blood vessel by the guidance of the puncture needle. A vein indwelling needle assembly characterized by that.