JPH08112355A - Inserter to blood vessel for medical treatment - Google Patents

Inserter to blood vessel for medical treatment

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Publication number
JPH08112355A
JPH08112355A JP6278375A JP27837594A JPH08112355A JP H08112355 A JPH08112355 A JP H08112355A JP 6278375 A JP6278375 A JP 6278375A JP 27837594 A JP27837594 A JP 27837594A JP H08112355 A JPH08112355 A JP H08112355A
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JP
Japan
Prior art keywords
tube
diameter
outer tube
tip
inner
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
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JP6278375A
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Japanese (ja)
Inventor
Hiroaki Nakajima
弘明 中島
Original Assignee
Togo Medikit Kk
東郷メディキット株式会社
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Application filed by Togo Medikit Kk, 東郷メディキット株式会社 filed Critical Togo Medikit Kk
Priority to JP6278375A priority Critical patent/JPH08112355A/en
Publication of JPH08112355A publication Critical patent/JPH08112355A/en
Application status is Pending legal-status Critical

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Abstract

PURPOSE: To make it possible to percutaneously introduce a catheter introducer and indwelling needle with small resistance into the blood vessel without inflicting more than necessary flaws on the tissues. CONSTITUTION: A diametrally reducing step part 3 and a long circular part 4 which has the diameter increasing toward the base end from this step part until the outside diameter is restored are formed at the front end of an inside tube 1 which is an expanding tube (or inside needle). The front end of an outside tube 5 which is a sheath (or cannula) is put as the convergent circular conical front end 6 on the long circular conical part 4 in tight contact therewith. The front end edge 7 thereof is positioned within nearly the outside diameter of the diametrally reducing step part 3 to form the structure in which angular step parts do not exist.

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【産業上の利用分野】本発明は経皮的に血管へ導入される医療のための挿入具、即ちカテーテルイントロデューサまたは留置針に関するものである。 The present invention relates to a insert for medical introduced into percutaneously vessel, i.e. it relates to a catheter introducer or indwelling needle.

【0002】 [0002]

【従来の技術】血管や臓器の診断或いは治療のためのカテーテルを血管へ経皮的に導入することに用いられるカテーテルイントロデューサは、細径の拡張管(ダイレータ)とシースとからなり、それらの基端のハブを互いに結合して拡張管をシースに先端部を突出させて挿通し、 BACKGROUND OF THE INVENTION Vascular and catheter introducer used to percutaneously introduced into a blood vessel catheter for the diagnosis or treatment of organ consists extension tube diameter and (dilator) and sheath thereof by combining the proximal end of the hub to each other by protruding the distal end portion of the extension tube to the sheath by inserting,
予め血管に挿入しておいたガイドワイヤに拡張管を嵌装して体内に刺し込み、シースを血管に導入してからガイドワイヤと拡張管とを抜取り、そしてカテーテルをシースに挿入して目的部位に到達させるものである。 Advance the guide wire that has been inserted into a blood vessel and fitted extended tube narrowing stab into the body, withdrawn after introduction of the sheath into the blood vessel with the guide wire and the dilator tube, and the target site by inserting a catheter into the sheath it is intended to reach the. また、 Also,
輸血や輸液或いは反対に脱血や脱液のため血管や胆管などに穿刺留置される留置針は、穿刺用の内針と留置用のカニューレ(キャセータ)とからなり、それらの基端の針基とハブとを互いに結合して内針をカニューレに先端部を突出させて挿通し、内針によって目的部位まで穿刺してから内針を抜取り、そして血液や薬液の容器または吸引器或いは人工腎臓回路をカニューレに接続するものである。 Indwelling needle to be punctured placed like a blood vessel or bile duct for transfusion or infusion, or opposed to the blood removal and liquid removal becomes from the cannula (Kyaseta) for the inner needle and the indwelling of the puncture, the needle hub of their proximal end and the inner needle by coupling the hub to each other and inserted by projecting tip cannula withdrawn the inner needle from the puncture to a target site by the inner needle, and blood or drug solution container or aspirator or artificial kidney circuit the is to connect to the cannula.

【0003】即ち、これらは内管である拡張管または内針と外管であるシースまたはカニューレとの二層構造であって、内管が外管よりも前方へ突出している状態で人体に刺し込まれる。 [0003] That is, these are a two-layer structure of the sheath or cannula is extended tube or inner needle and the outer tube is an inner tube, pierced in the human body in a state in which the inner tube than the outer tube projects forwardly It is written. 従って、外管の先端縁がかどばった段を形成している形状を呈しており(カテーテルイントロデューサにあっては実開平1−112849号公報、 Therefore, it has a shape in which the tip edge of the outer tube forms the stages Kadoba' (In the catheter introducer real Hei 1-112849, JP-
留置針にあっては実開平5−35149号公報参照)、 In the indwelling needle see Japanese Patent real-Open No. 5-35149),
穿刺の際に組織に引掛かって挿入の妨げになったり、組織を必要以上に大きく傷付ける、ということがある。 Or become in the way of insertion I or hooking into the tissue at the time of puncture, hurt unnecessarily large organization, there is that.

【0004】一方、カテーテルにおいては導入距離が長いことを考慮して先端部分を除き全体的にかなりの硬さをもたせることが要求されており、そのために互いに密着させた内管と外管との二層構造とし内管を外管よりも前方へ突出させるとともに外管の先端部を先端へ向け小径となるようになめらかに傾斜させ先端を内管外径と等しくしたカテーテルが提案されている(実公平4−12 On the other hand, it is required that to have an overall significant hardness except the tip portion considering that introduced distance is long in the catheter, the inner tube and the outer tube is brought into close contact with each other for the catheter equal to the inner tube outer diameter tip is smoothly inclined so that the diameter toward the distal end portion of the outer tube to the tip causes protrudes forward than the outer tube inner tube is a two-layer structure has been proposed ( real fairness 4-12
992号公報参照)。 See No. 992). このようにすると、外管はかどばった先端縁をもたないので円滑に挿入できるとともに組織を必要以上に傷付けるという心配が解消される。 In this way, concern that the outer tube is hurt tissue than necessary it is possible to smoothly insert because no leading edge which Kadoba' is eliminated.

【0005】しかしながら、実際には外管の先端部を先端縁に段がないようになめらかに成形するのはきわめて困難であり、また仮に段がないように成形できても、カテーテルイントロデューサや留置針のように挿入後に内管および外管の一方を抜取るものにおいては、これらの間にわずかな隙間があると薄肉化されている外管先端が組織に引掛かってかどばった段を有するものと同じ結果を招いてしまう。 However, actually a is extremely difficult to smoothly shaped to avoid stage the tip edge of the distal end portion of the outer tube, also be be molded if so no stages, the catheter introducer and detention in those withdrawing one of the inner and outer tubes after insertion as needles, to that outer tube tip is thinned if there is a slight gap between them has a step which Kadoba' I or hooking to the tissue which leads to the same result. 従って、内管と外管とを密着一体化した前記カテーテルにおける考えを挿入後に内管および外管の一方を抜取る形式の血管挿入具に適用するのは得策でない。 Therefore, it is not advisable to apply to the inner and outer tubes and the adhesion integral vessel insert of the type withdrawing one of the inner and outer tubes after insertion the idea of ​​the catheter.

【0006】 [0006]

【発明が解決しようとする課題】本発明が解決しようとする課題は、内管と外管との二層構造であって内管が外管に先端部を突出させて挿通されており、経皮的に血管に導入した後にいずれか一方が抜取られる構造の医療用血管挿入具がもってっている外管先端が挿入の妨げとなったり組織を徒らに傷付けたりすることがある、という点である。 Challenge [0008] The present invention is to provide the inner tube a double-layered structure of the inner and outer tubes are inserted is protruded tip portion to the outer tube, through may or hurt either one or hinders the outer tube tip medical vascular insertion tool is going to have a structure in which withdrawn is inserted tissue taken after introduction in the skin to the blood vessel, that it is.

【0007】 [0007]

【課題を解決するための手段】本発明は前記課題を解決し、組織を徒らに傷付けることなく円滑に挿入することができる医療用血管挿入具を提供することを目的とするものであって、内管の先端部に縮径段部を環状に設けてそれより基端へ向かって大径となり外径を回復する長円錐部を形成し、外管の先端部を長円錐部に密着してかぶせ先端縁を縮径段部のほぼ外径内に位置させる構成とした。 Means for Solving the Problems The present invention solves the above problems, tissue be one that aims to provide a medical vessel insertion tool can be smoothly inserted without damaging the tiger the diameter-reduced step portion to form a long conical section to recover it outside diameter and large diameter toward it from the proximal end is provided annularly on the tip portion of the inner tube, and close contact with the tip portion of the outer tube to the long conical portion Cover Te tip edge was configured to be positioned substantially within the outer diameter of the diameter-reduced step portion. 尚、この構成は拡張管を内管とするとともにシースを外管とし血管導入後に拡張管を抜取るようにしたカテーテルイントロデューサ、または内針を内管とするとともにカニューレを外管とし血管導入後に内針を抜取るようにした留置針に適用される。 Incidentally, the sheath together with the arrangement and the inner tube expansion tube outer tube and to the catheter introducer and to extract the extension tube after vascular introduction, or the cannula as well as the inner needle inner tube after vascular introduced to the outer tube apply the inner needle in the indwelling needle as withdrawn.

【0008】 [0008]

【作用】外管の先端部が内管の長円錐部に密着してかぶせられている状態で両者一体に経皮的に血管に導入する。 SUMMARY OF] introduced percutaneously vessel to both integrally in a state in which the leading end portion of the outer tube is covered in close contact with the long conical portion of the inner tube. このとき、外管の先端縁は段部のほぼ外径内に位置しているためかどばった段部が存在せず、このため抵抗が小さく円滑に挿入され且つ組織を徒らに傷付けることなく所定位置まで導入されることとなる。 At this time, the tip end of the outer tube there is no stepped portion Kadoba' for being located substantially within the outer diameter of the stepped portion, a predetermined without damaging Therefore the resistance is small smoothly inserted into and tissue taken so that the introduced to the position.

【0009】 [0009]

【実施例】図面を参照して本発明の実施例を説明すると、図1はカテーテルイントロデューサに本発明を適用した実施例であって、軟質合成樹脂で作られた細径の拡張管である内管1と、同じく軟質合成樹脂で作られた細径のシースである外管5とからなり、それらの基部の図示しないハブを互いに結合することにより内管1が外管5に先端部を突出させて挿通されている。 EXAMPLES To illustrate embodiments of the invention with reference to the drawings, FIG. 1 is a example of applying the present invention to the catheter introducer is the extension tube diameter made of soft synthetic resin the inner tube 1, also consists of an outer tube 5 which is a thin sheath made of soft synthetic resin, the inner tube 1 by coupling the hub (not shown) of their bases each other a distal end portion to the outer tube 5 are protruded is inserted.

【0010】内管1の先端部は先端へ向かって小径となるテーパが付されており、先端内径はガイドワイヤの径と等しくされている。 [0010] The inner pipe 1 tip are denoted by the taper whose diameter toward the tip, the tip inner diameter is equal to the diameter of the guide wire. また、このテーパ部2の始まり部分に縮径段部3が環状に設けられており、それより基端へ向かって次第に大径となり外径を回復する長円錐部4 Further, a diameter-reduced step portion 3 is provided annularly beginning part of the tapered portion 2, long conical portion 4 to towards it from the base end restore it outside diameter and large-diameter gradually
が形成されている。 There has been formed.

【0011】外管5は内管1にほぼ隙間なくかぶせられ、且つ先端部は先細となる長円錐状で次第に薄肉とされていて、この円錐先端部6が長円錐部4に密着してかぶせられているとともに、丸味をもたせた先端縁7が内管1の外径内に位置して縮径段部3の近くに達している。 [0011] the outer tube 5 is substantially gap is covered without the inner tube 1, and the tip have been progressively thinner in shape long cone tapers, covered the conical tip 6 is in close contact with the long cone 4 together are, reaching close to the diameter-reduced step portion 3 is positioned within the outer diameter of the inner tube 1 is front end edge 7 of remembering rounded.

【0012】このような構成の本実施例は、従来のカテーテルイントロデューサと全く同様に、予め血管に挿入しておいたガイドワイヤに拡張管である内管1を嵌装して体内に刺し込むことにより、一体となって刺し込まれるシースである外管5を血管に導入し、次にガイドワイヤと内管1とを抜取ってからカテーテルを外管5に挿入し目的部位まで誘導させるものである。 The present embodiment having such a configuration, just like the conventional catheter introducer, plugging into the body by fitted the inner tube 1 is expanded tube to a guide wire which had been inserted in advance vessel by, one which induces the outer tube 5 is a sheath plugged together and introduced into a blood vessel, then from the withdrawn guide wire and the inner tube 1 to inserting the target site the catheter outer tube 5 it is.

【0013】外管5は先端部が長円錐部4に沿って次第に小径となり、且つ丸味をもった先端縁7が縮径段部3 [0013] the outer tube 5 tip gradually becomes smaller in diameter along the length conical portion 4, the tip end 7 is diameter-reduced step portion 3 and with a rounded
にかくれて先端へ向かうかどばった段部が存在しない状態で内管1にかぶせられているので、刺し込みの際に組織に引掛かることがなく小さい抵抗で円滑に挿入できるとともに組織を必要以上に傷付けるということもない。 Since step portion Kadoba' toward tip hidden are over the inner tube 1 in the absence, in excessive tissue together smoothly inserted tissue argument hanging small without resistance to the time inclusive stab nor that hurt.

【0014】また、内管1を抜取る際に外管5の円錐先端部6はデーパ部2により押し拡げられ、内管1が抜取られた後は自身の弾性力で再び原形状に戻る。 Further, the conical tip 6 of the outer tube 5 when extracting the inner tube 1 is pushed open by the Depa unit 2, after the inner tube 1 has been withdrawn is returned to the original shape again in its own elastic force. このため、内管抜取りやカテーテル挿入の際に外管5が動いても、先端縁7が外管5の外径内に位置していることにより、血管壁を傷付け或いは剥離させるということがなく安全である。 Therefore, even when moving the outer tube 5 in the inner tube sampling and catheterization, by leading edge 7 is located within the outer diameter of the outer tube 5, it is not that to damage or peeling vessel walls it is safe.

【0015】図2は留置針に本発明を適用した実施例であって、金属で作られた細径の内針である内管11と、 [0015] Figure 2 is an example of applying the present invention to an indwelling needle, an inner tube 11 is a small diameter of the inner needle made of metal,
軟質合成樹脂で作られた細径のカニューレである外管1 Outer tube 1 is a small diameter cannula made of soft synthetic resin
5とからなり、これらの基部の図示しない針基とハブとを互いに結合することにより内管11が外管15に先端部を突出させて挿通されている。 Consists of 5 Prefecture, the inner pipe 11 is inserted is protruded tip portion to the outer tube 15 by combining the needle base and the hub (not shown) of the base from each other.

【0016】内管11の先端は穿刺用の刃部12を形成しており、その少し基端側に縮径段部13が環状に設けられているとともに、それより基端へ向かって次第に大径となり外径を回復する長円錐部14が形成されている。 The tip of the tube 11 forms a blade portion 12 of the puncture, with diameter-reduced step portion 13 at its slightly proximal side is provided in an annular, gradually large toward it from the proximal end long conical section 14 to restore it outer diameter and diameter is formed.

【0017】外管15は内管11にほぼ隙間なくかぶせられ、且つ先端部は先細となる長円錐状で次第に薄肉とされていて、この円錐先端部16が長円錐部14に密着してかぶせられているとともに、丸味をもたせた先端縁17が内管11の外径内に位置して縮径段部13に接している。 The outer tube 15 is covered with almost no clearance in the inner tube 11, and tip have been progressively thinner in shape long cone tapers, covered the conical tip 16 is in close contact with the long conical section 14 together are in contact with the reduced diameter step portion 13 is located within the outer diameter of the inner tube 11 leading edge 17 remembering rounded.

【0018】このような構成の本実施例は、従来の留置針と全く同様に径皮的に血管に穿刺し、次に内針である内管11を抜取ってカニューレである外管15を留置した状態で血液や薬液の容器または吸引器或いは人工腎臓回路を接続するものである。 [0018] The present embodiment thus configured, punctures in the same manner as 径皮 to vessels with conventional indwelling needle, the outer tube 15 is a cannula withdrawn inner tube 11 is the inner needle then it connects the container or aspirator or artificial kidney circuit blood or drug solution with indwelling state.

【0019】本実施例においても外管15は丸味をもった先端縁17が縮径段部13にかくれて先端へ向かうかどばった段部が存在しない状態で内管11にかぶせられているので、穿刺の際に組織に引掛かることがなく小さい抵抗で円滑に挿入できるとともに組織を必要以上に傷付けるということもない。 [0019] Since the distal edge 17 the outer tube 15 with a rounded are over the inner tube 11 in the absence of stepped portion Kadoba' toward tip hiding the diameter-reduced step portion 13 also in this embodiment, nor that hurt unnecessarily tissue together smoothly inserted in quotation hanging without small resistance to tissue when puncturing.

【0020】また、内管11を抜取る際に一時的に拡げられた円錐先端部16は自身の弾性力で再び原形状に戻るので、先端縁17が血管壁を傷付け或いは剥離させるということがなく安全である、という点も先の実施例と同じである。 Further, since the conical tip 16 which is spread temporarily when withdrawing the inner tube 11 is returned to the original shape again in its own elastic force, is that leading edge 17 causes the damage or peeling off the blood vessel wall no safe, it is the same as the previous embodiment also that.

【0021】尚、外管5,15の先端縁7,17は縮径段部3,13から内管1,11の外径外に露出していても丸味をもたせることによりかどばった段部を存在させず安全である。 [0021] Incidentally, the leading edge 7, 17 is stepped portion Kadoba' by be exposed to the outside radially of the inner tube 1 and 11 from the diameter-reduced step portion 3, 13 impart a rounded outer tube 5,15 without the presence of a safety. また、円錐先端部6,16を薄肉化すると縮径段部3,13をそれだけ浅く形成して内管1,1 The inner and the conical tip 6, 16 and correspondingly shallow a diameter-reduced step portion 3 and 13 when thinning the tube 1,1
1の抜取りを容易ならしめることができ、操作上有利であるばかりか、殊に留置針のカニューレである場合は欠陥内に留置される先端部分が柔軟性に富み、血管を傷付ける心配が皆無になるという利点がある。 1 of extraction can makes it easy, not only is the operational advantage, in particular the tip portion when a cannula indwelling needle which is placed in the defect flexible and nil fear of damaging the blood vessel there is an advantage in that.

【0022】 [0022]

【発明の効果】以上の説明から明らかなように、外管の先端部を先細りの円錐先端部とし、内管に設けた先細りの長円錐部に密着して沿わせるとともに先端縁を内管のほぼ外径内に位置させた本発明によると、外管の先端にかどばった段部が存在しなくなり、体内に挿入する際に抵抗が小さく円滑に挿入できるとともに組織を必要以上に大きく傷付けることがなく、容易且つ安全に取扱えるものである。 As apparent from the above description, the distal end portion of the outer tube and the conical tip of the tapered, causes along in close contact with the long conical portion tapering provided on the inner tube of the inner tube to the distal edge According to the present invention that substantially is positioned within the outer diameter, no longer exists stepped portion Kadoba' the distal end of the outer tube, may damage unnecessarily large organization with resistance during insertion into the body can be reduced smoothly inserted rather, it is intended that easily and safely handled. また、長円錐部、縮径段部および円錐先端部はきわめて簡単に成形でき、かどばった段部を存在させないという構造を容易に形成させることができる。 The length conical section, reduced diameter step portion and a conical tip can be very easily molded, the structure of the absence of stepped portion Kadoba' can be easily formed.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】本発明の実施例の一部拡大した縦断面部分図。 Figure 1 is a longitudinal sectional partial view of a partially enlarged embodiments of the present invention.

【図2】本発明の異なる実施例の一部拡大した縦断面部分図。 Figure 2 is a longitudinal sectional partial view of a partially enlarged different embodiments of the present invention.

【符号の説明】 DESCRIPTION OF SYMBOLS

1,11 内管, 3,13 縮径段部, 4,14 1,11 inner tube, 3,13 diameter-reduced step portion, 4 and 14
長円錐部, 5,15外管, 6,16 円錐先端部, Long conical portion, 5,15 outer tube, 6, 16 conical tip,
7,17 先端縁。 7, 17 tip edge.

Claims (3)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 内管と外管との二層構造であって内管が外管に先端部を突出して挿通されており、経皮的に血管に導入した後にいずれか一方が抜取られる構造の医療用血管挿入具において、前記内管の先端部に縮径段部が環状に設けられているとともにそれより基端へ向かって大径となり外径を回復する長円錐部が形成されており、前記外管の先端部は前記長円錐部に密着してかぶせられ先端縁が前記縮径段部のほぼ外経内に位置させられていることを特徴とする医療用血管挿入具。 Structure inner tube 1. A inner tube and a two-layer structure of the outer tube are inserted to protrude the tip outer tube, which is either one after introducing percutaneously vessels withdrawn in the medical vascular insert has long conical section to recover it outside diameter and large diameter toward it from the proximal end together with the reduced-diameter step portion is provided annularly formed at the front end of the inner tube the medical vascular insertion tool, characterized in that it is is positioned substantially outside the through of the outer tube of the tip the tip end capped in close contact with the length conical portion the diameter-reduced step portion.
  2. 【請求項2】 請求項1記載の挿入具が拡張管を内管とするとともにシースを外管とし、血管導入後に拡張管が抜取られるカテーテルイントロデューサである医療用血管挿入具。 2. A method according to claim 1, wherein the insert is an outer tube of the sheath as well as the inner tube of the extension tube, medical vascular insert a catheter introducer extension tube is withdrawn after vascular introduction.
  3. 【請求項3】 請求項1記載の挿入具が内針を内管とするとともにカニューレを外管とし、血管導入後に内針が抜取られる留置針である医療用血管挿入具。 3. A cannula with the insertion tool of claim 1 wherein is the inner tube and the inner needle and the outer tube, the medical vascular insertion tool is indwelling needle in which an inner needle is withdrawn after vascular introduction.
JP6278375A 1994-10-18 1994-10-18 Inserter to blood vessel for medical treatment Pending JPH08112355A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6278375A JPH08112355A (en) 1994-10-18 1994-10-18 Inserter to blood vessel for medical treatment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6278375A JPH08112355A (en) 1994-10-18 1994-10-18 Inserter to blood vessel for medical treatment

Publications (1)

Publication Number Publication Date
JPH08112355A true JPH08112355A (en) 1996-05-07

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP6278375A Pending JPH08112355A (en) 1994-10-18 1994-10-18 Inserter to blood vessel for medical treatment

Country Status (1)

Country Link
JP (1) JPH08112355A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997026938A1 (en) * 1996-01-22 1997-07-31 Endogad Research Pty. Limited Dilator and introducer assembly
JP2012502738A (en) * 2008-09-18 2012-02-02 グレイゼル,ジョセフ Medical guide member having a diameter transition portion
JP2017512569A (en) * 2014-03-24 2017-05-25 ベイリス メディカル カンパニー インコーポレイテッドBaylis Medical Company Inc. Medical device for fluid communication

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997026938A1 (en) * 1996-01-22 1997-07-31 Endogad Research Pty. Limited Dilator and introducer assembly
US6106540A (en) * 1996-01-22 2000-08-22 Baxter International Inc. Dilator and introducer assembly
JP2012502738A (en) * 2008-09-18 2012-02-02 グレイゼル,ジョセフ Medical guide member having a diameter transition portion
JP2017512569A (en) * 2014-03-24 2017-05-25 ベイリス メディカル カンパニー インコーポレイテッドBaylis Medical Company Inc. Medical device for fluid communication

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