JPS62197051A - Medical tubular body - Google Patents
Medical tubular bodyInfo
- Publication number
- JPS62197051A JPS62197051A JP61038760A JP3876086A JPS62197051A JP S62197051 A JPS62197051 A JP S62197051A JP 61038760 A JP61038760 A JP 61038760A JP 3876086 A JP3876086 A JP 3876086A JP S62197051 A JPS62197051 A JP S62197051A
- Authority
- JP
- Japan
- Prior art keywords
- tubular body
- hardness
- tube
- blood
- thickness
- Prior art date
- 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
Links
- 238000003780 insertion Methods 0.000 claims description 41
- 230000037431 insertion Effects 0.000 claims description 41
- 239000000463 material Substances 0.000 claims description 9
- 230000017531 blood circulation Effects 0.000 description 13
- 210000004204 blood vessel Anatomy 0.000 description 12
- 208000007536 Thrombosis Diseases 0.000 description 7
- 210000000709 aorta Anatomy 0.000 description 4
- 210000004369 blood Anatomy 0.000 description 4
- 239000008280 blood Substances 0.000 description 4
- 230000036772 blood pressure Effects 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 229920002635 polyurethane Polymers 0.000 description 3
- 239000004814 polyurethane Substances 0.000 description 3
- 229920000915 polyvinyl chloride Polymers 0.000 description 3
- 239000004800 polyvinyl chloride Substances 0.000 description 3
- 230000002785 anti-thrombosis Effects 0.000 description 2
- 239000003146 anticoagulant agent Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229920001400 block copolymer Polymers 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 210000005259 peripheral blood Anatomy 0.000 description 2
- 239000011886 peripheral blood Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 244000025254 Cannabis sativa Species 0.000 description 1
- 241001391944 Commicarpus scandens Species 0.000 description 1
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- 240000002834 Paulownia tomentosa Species 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 244000269722 Thea sinensis Species 0.000 description 1
- 229960004676 antithrombotic agent Drugs 0.000 description 1
- 239000002473 artificial blood Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 210000001217 buttock Anatomy 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000001105 femoral artery Anatomy 0.000 description 1
- 210000002414 leg Anatomy 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- -1 polysiloxane Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 210000005239 tubule Anatomy 0.000 description 1
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
イ、産業上の利用分野
本発明は外科的手術に際して例えばバイパスチェープと
して好適に用いられる医療用管状体に関する。DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to a medical tubular body suitably used, for example, as a bypass chain during surgical operations.
口・ 従来の技術及び問題点
従来、血流の遮断が必要な外科的手術にρして人Ｔ面臀
慈の戻拵用管綬伏がパイノぐスチ、−プとして末梢への
血流の確保に用いられているが、人工血管の場合にはバ
イパスに際して挿入血管壁等と充分な縫合が必要であシ
、そのため作業も大変で手術にも長時間を要している。- Conventional techniques and problems Conventionally, in surgical operations that require the interruption of blood flow, a tube for the return of a person's T-faced buttocks has been used as a pinhole to prevent blood flow to the periphery. However, in the case of artificial blood vessels, sufficient suturing is required to the wall of the inserted blood vessel when bypassing, making the work difficult and requiring a long period of time.
また、複数本の異径テ１−プをコネクターで接続して中
央部分の径を大きくかつ両熾の径を小さくして挿入や血
管壁等との固定を容易にしているが、接続部分の段差や
凹凸等による血液滞留のため血栓を生じ易いという問題
がある。さらに、米国特許第２９４０１２６τ
号公報に記載の製法によりそ得られる内面に凹凸のない
チェーツも用いられているが該チューブにありては両端
部分における肉厚を中央部分くおける肉厚と同じか又は
厚くしているため血管壁等への挿入もし鑓く、また、挿
入容易なように挿入先端部の外径を細くすれば必要な血
流量が得られ難くなシ、肉厚を薄くして内径を確保しよ
うとすれば管状体、特に胴部の強度が問題となる。In addition, multiple tapes with different diameters are connected with a connector, and the diameter of the central part is made large and the diameter of both ends is made small to facilitate insertion and fixation to the blood vessel wall. There is a problem in that blood stagnation due to steps, unevenness, etc. tends to cause blood clots. Furthermore, a tube with no irregularities on the inner surface obtained by the manufacturing method described in U.S. Pat. Because it is thick, it is difficult to insert it into the blood vessel wall, etc., and if the outer diameter of the insertion tip is made thinner for easier insertion, it will be difficult to obtain the necessary blood flow. In order to ensure this, the strength of the tubular body, especially the body, becomes an issue.
ハ・ 問題点を解決する之めの手段
本発明はこれらの問題点を改良したものでありて、より
簡単に血管壁等に挿入縫合でき、多址のパイ・臂ス血流
量も得られしかも血栓の発生を防止したもので、その被
旨は、挿入部両端部分の外径を胴部中央部分の外径より
細くして成形した管状体でありて、少なくとも胴部の太
管部分から挿入部の細管部分となる部位の管状体の肉厚
を連続的に薄くして形成した医療用管状体に係る。C. Means for solving the problems The present invention improves these problems, and allows for easier insertion and suturing into blood vessel walls, etc., and allows for a greater amount of blood flow in the arms and legs. This product prevents the formation of blood clots, and its purpose is to make the outer diameter of the insertion part smaller at both ends than the central part of the body. This relates to a medical tubular body formed by continuously reducing the wall thickness of the tubular body at a portion that becomes a thin tube portion.
以下に本発明の実施例を図面にもとづき説明する。第１
図は本発明に係る医療用管状体の断面図であり、大管部
分の胴部と細管部分の挿入部とから構成される。胴部は
外径（ｄ） ３ ｗａｍ〜１８ｍの範囲で、はぼ中央部
分であるｄｏを顛も大として形成される。１８剛より大
きくしても血流量からし過大の面積となシ好ましくなく
、３ｍｍより小さいと血流量が充分に得られ難いので好
ましくない。また、管の肉ノ９も０．３■〜３． Ｏｔ
ａｇ、の範囲で形成されるのが好ましい。Embodiments of the present invention will be described below based on the drawings. 1st
The figure is a sectional view of a medical tubular body according to the present invention, which is composed of a body portion of a large tube portion and an insertion portion of a thin tube portion. The body has an outer diameter (d) in the range of 3 wam to 18 m, and is formed with the center portion do being larger. Even if it is larger than 18 mm, it is not preferable because the area becomes excessively large due to the blood flow rate, and if it is smaller than 3 mm, it is difficult to obtain a sufficient blood flow rate, which is not preferable. Also, the pipe meat No. 9 is 0.3 - 3. Ot
It is preferable that it is formed in the range of ag.
３ｍより厚くしては加工性、可撓り、コスト等より好ま
しくなく、０．３ ｔｅａより博いと強度等より好まし
くない。胴部の肉厚はほぼ中央部を最も浮くして、管端
まで連続的に薄くなるように形成してもよく、胴部全体
を挿入部への引、フルし部分までほぼ均厚状として形成
してもよい。If it is thicker than 3 m, it is unfavorable in terms of workability, flexibility, cost, etc., and if it is wider than 0.3 tea, it is unfavorable in terms of strength, etc. The wall thickness of the body may be formed so that it is highest at the center and becomes continuously thinner to the ends of the tube, and the entire body is approximately uniform in thickness until the part where it is pulled into the insertion section and filled. may be formed.
挿入部の外径は２Ｍ〜１２ｍの範囲で形成されることが
好”ましい。この場合において、両端部分の外径ｄｌ
ｌｄ、は前記力同部の外径ｄ、より祁１＜なければなら
ない。血流量を効果的に得るため及び血管壁への挿入固
定を容易とするためである。It is preferable that the outer diameter of the insertion portion is formed in the range of 2 m to 12 m. In this case, the outer diameter dl of both end portions is
ld is the outer diameter d of the above-mentioned force section, so 1 must be less than 1. This is to effectively obtain blood flow and to facilitate insertion and fixation into the blood vessel wall.
１２ｍより大きいと血管壁等への挿入や縫合−足が困難
となシ、好ましくなく、２■より小さくては血流量が得
られ難くなシ好ましくない。肉ｊりの形成は前記した如
く胴部より挿入部先端まで連続的に薄くして形成しても
よく、引落し部分から押入部先端まで連続的に薄＜シて
もよく、引落し部分だけ連続的に薄くし、挿入部は均賀
状として形成してもよい。挿入部先端ｄ、、ｄ、のｔ厚
は０．１■〜１．５■の範囲で形成されるのが好ましい
。If it is larger than 12 m, it will be difficult to insert it into the blood vessel wall or suture it, which is undesirable, and if it is smaller than 2 m, it will be difficult to obtain blood flow, which is undesirable. As described above, the thickness may be formed by continuously thinning from the body part to the tip of the insertion part, or it may be formed continuously from the withdrawing part to the tip of the insertion part, or by forming the thickness continuously from the withdrawing part to the tip of the insertion part. It may be made thinner continuously, and the insertion portion may be formed as a Japanese card. It is preferable that the thickness of the insertion portion tips d, , d, be formed in a range of 0.1 to 1.5 inches.
１．５ｍ＋より厚いと内径が細くなって所望の血＠量が
得られ翔くなシ、０．１ ｗｍより薄いと強度上問題を
生じ好ましくない。If it is thicker than 1.5 m+, the inner diameter becomes too thin and the desired amount of blood cannot be obtained, and if it is thinner than 0.1 wm, problems arise in terms of strength, which is not preferable.
胴部から挿入部へかけてのひき落し部分の形成は、本出
願人がすでに提案し九も願昭６０−６６９９０号明細類
に記載した方法によって行うことが好ましい。この引落
しの形成に際して、少なくとも胴部の大管部分より挿入
部の細管部分にかけて管状体の肉厚を連続的に渇くシて
形成しなけれはならない。挿入部の肉厚を丸くすること
により所定の内径の大きさを確保し、所望のＪｆｉＩ流
量が得られるからであシ、また連続的に薄肉化すること
により、内面での段差や凹凸のない管状体が得られ、従
って面取の滞留がなく血栓の発生が防止できるからであ
る。なお、挿入の容易性等より ＪＡＩＬ続的薄内的薄
肉化部先端まで形成されることが好ましい。It is preferable to form the drop-off portion from the trunk to the insertion portion by the method already proposed by the present applicant and described in the specification of Application No. 60-66990. When forming this drawdown, the thickness of the tubular body must be continuously increased from at least the large tube portion of the body to the thin tube portion of the insertion portion. By rounding the wall thickness of the insertion part, a predetermined inner diameter size can be secured and the desired JfiI flow rate can be obtained.Also, by making the wall thickness continuously thinner, there is no step or unevenness on the inner surface. This is because a tubular body is obtained, and therefore, there is no retention of chamfers, and the occurrence of thrombus can be prevented. In addition, from the viewpoint of ease of insertion, it is preferable that the JAIL is formed up to the tip of the internally thinned part.
管状体を構成する材料としては、ポリアミド、ポリウレ
タン、？り塩化ビニル、シリコンゴム等が好適に用いら
れる。また、挿入部の管厚を胴部よ＃）溶くするため及
び細管への該ａ状体挿入時の操作性を向上させるため挿
入部を構成する材料の硬度が胴部を構成する材料の硬度
より大であることが好ましい。挿入部を構成する月相の
硬度はウオーレス硬度７０〜９８度の範囲で用いられる
ことが好ましく、胴部を構成する材料の硬度は２０〜８
０度の範囲で用いられることが好ましい。硬度がこれら
の範凹外である場合には胴部の硬度が大きすぎると血管
をパイノ４スするとき自由に曲らず操作性が悪くなシ、
小さすぎるとキンク（折曲現象）しやすくなる。挿入部
の硬度が大きすぎると、細管を傷つけたり、破り九りし
ゃすくなりて危険であシ、また、硬度が小さすぎると挿
入時、管状体が変形し挿入し難く、外力によるキンクが
起シやすく、シかも糸などによる固定のための力により
変形してしまうからである。The materials that make up the tubular body include polyamide, polyurethane, etc. Polyvinyl chloride, silicone rubber, etc. are preferably used. In addition, in order to melt the tube thickness of the insertion part compared to the body part and to improve the operability when inserting the a-shaped body into the thin tube, the hardness of the material making up the insertion part is the same as the hardness of the material making up the body part. Preferably, it is larger. It is preferable that the hardness of the moon phase forming the insertion part is in the range of 70 to 98 degrees on the Wallace hardness, and the hardness of the material forming the body is 20 to 8.
It is preferable to use the angle in the range of 0 degrees. If the hardness is outside these ranges, if the hardness of the torso is too high, it will not bend freely when pinching blood vessels and will have poor operability.
If it is too small, kink (bending phenomenon) is likely to occur. If the hardness of the insertion part is too high, the tubule may be damaged or easily broken, which is dangerous.If the hardness is too low, the tubular body deforms during insertion, making it difficult to insert, and kinks may occur due to external force. This is because it is easy to break and deforms due to the force of fixing it with thread or the like.
なお、抗血栓性にさらにすぐれた管状体とするために、
管内面に抗血栓材料、例えばポリウレタンポリシロキサ
ンブロック共重合体、セグメント化ポリウレタン、その
他公知のものを塗布して用いることができる。In addition, in order to make the tubular body even more excellent in antithrombotic properties,
Antithrombotic materials such as polyurethane polysiloxane block copolymers, segmented polyurethanes, and other known materials can be coated on the inner surface of the tube.
また、挿入時の目じるしゃ挿入後のｂ；定の容易性等よ
り、挿入部に第２図に示す如＜ ’ｂ−外周に１慶出状
のつば部を設けてもよい。Further, for ease of setting the eye mark after insertion, the insertion portion may be provided with a bulge-shaped flange portion on the outer periphery as shown in FIG. 2.
ニ０発明の効果
以上に説明した如く本発明に係る医療用管状体は、容易
に血管壁に押入することが出来、縫合も簡単に出来るこ
とより短時間で目的とするパイ・ゼス手術が出来、かつ
血管壁へのｉｌ！Ｌ１足もよ＜ 、ｔａｒ 蹟の血？［
が容易に得られ、内面が連続して一体に形成されている
ため血液のＰｒ＋１留がなく血栓の発生もない等の特徴
を有するものである。D. Effects of the Invention As explained above, the medical tubular body according to the present invention can be easily pushed into the blood vessel wall and can be easily sutured, making it possible to perform the intended surgery in a short time. , and il to the blood vessel wall! L1 foot too <, tar blood of the grass? [
can be easily obtained, and because the inner surface is formed continuously and integrally, there is no Pr+1 blood retention and no thrombus formation.
ホ、実施例 以下に実施例により、本発明をさらに説明する。E, Example The present invention will be further explained below with reference to Examples.
原料チューブとして、ポリ塩化ビニールチューブ（商品
名タイボンチューブ）を用い、胴部から挿入Ｂ１１への
引落しく径をしばり細ｔ４状にする状態）は前記％Ｘ！
！１１１Ｆ：１６０−６６９９０−ｔ’提案した方法に
より、第１図に示す如き管状体を作った。胴部の外径は
中央部から引落し部分まで同径の１２．７ｍｍであり、
挿入部の径は、１２．７ｍｍから連続的に引ｉ′、シ、
す１洛し部分を除き両端部分の外径を４．９闇として成
形した。A polyvinyl chloride tube (trade name: Tybon Tube) is used as the raw material tube, and the diameter is tightened to form a thin T4 shape as it is drawn down from the body to the insertion B11).
! 111F:160-66990-t' A tubular body as shown in FIG. 1 was made by the proposed method. The outer diameter of the body is the same from the center to the drawdown part, 12.7 mm.
The diameter of the insertion part is continuously increased from 12.7 mm to i',
The outer diameter of both end portions, excluding the rounded portion, was molded to 4.9 mm.
なお、管厚は胴部が１．６ ｍで、引落し部分から挿入
部両端部分までを連続的に薄肉化し、両端部分の管厚を
０．５５■として形成した。また、胴部の硬度はフォー
レス硬度６８であり、挿入部両端部分の硬度は９５であ
シ、長さは挿入部が３０ｍ。The thickness of the tube was 1.6 m at the body, and the thickness of the tube was continuously reduced from the pull-down part to both ends of the insertion part, and the thickness of the pipe at both ends was 0.55 mm. The hardness of the body is 68 on the Fores hardness scale, the hardness of both ends of the insertion part is 95, and the length of the insertion part is 30 m.
引落し部が５０瓢、胴部が４５０ｍであった。The draw section was 50 meters long, and the trunk section was 450 meters long.
この管状体を大動脈パイノ４スチューブとして、内面に
ポリタレタン？Ｉリシロキサンブロックコポリマーの抗
血栓劇を塗布し、成伴大の弓状大動脈と大腿動脈間をパ
イノやスし用いた。ノ譬イノ母スされた大動脈をフラン
グし、約３時間のパイノ母スを行なった。パイノ譬ス血
流量ｆｉＯ，４５ｔ／分であシ、中枢血圧は１５０、末
梢血圧は１００であった。This tubular body is used as an aorta pino 4 tube, and the inner surface is made of polytaretan? An antithrombotic agent made of I-lysiloxane block copolymer was applied and used as a pino-sugar between the arched aorta and the femoral artery. The aorta that had been injected was flanged, and the aorta was injected for about 3 hours. The blood flow rate fiO was 45 t/min, the central blood pressure was 150, and the peripheral blood pressure was 100.
本実施例においては挿入及び血管壁の縫合が極めて良好
に行なえ、・ぐイパス後、舌状体内部を調べたところ血
栓の付着はどこにもなかった。In this example, the insertion and suturing of the blood vessel wall were performed extremely well, and when the inside of the tongue-like body was examined after passing the tongue, there was no thrombus attached anywhere.
比較例１
実施例で用いた原料チューブを肉厚を胴部、引落し部、
挿入部両端部分を全て１．６ ｍと同厚とした外は実施
例と同様にして管状体を作成し、実施例と同様に成人を
用いてパイ／４’スを行った。Comparative Example 1 The wall thickness of the raw material tube used in the example was
A tubular body was prepared in the same manner as in the example except that both end portions of the insertion portion were made to have the same thickness of 1.6 m, and a pie/4' test was performed using an adult in the same manner as in the example.
パイノ々ス血流量は０．１５１７分と非常に悪く、管状
体内面にも血栓が付着していた。The blood flow rate was very poor at 0.1517 min, and blood clots were also attached to the inner surface of the tubular body.
比較例２
原料チューブとしてポリ塩化ビニルを用い、外径を胴部
、押入部とも同径とし、管厚も０．５５ｗＴ管全体全問
厚とし、硬度も胴部、挿入部とも同じ（フォーレス硬度
６８）で管状体を作成し、本実施例と同様に成人による
パイノ々ス実験を行った。Comparative Example 2 Polyvinyl chloride was used as the raw material tube, the outer diameter was the same for the body and the insertion part, the tube thickness was 0.55wT throughout the entire tube, and the hardness was the same for the body and the insertion part (Fores A tubular body was made with a hardness of 68), and a pinosu experiment was conducted with adults in the same manner as in this example.
外径ｔｒｉ ４．９ ｔｍ、管厚は０．５５ｍ＋、ｉ（
度はフォーレス硬度６８であった。本例における血流量
は０．３２ｔ／分でＷｅ例に比べ少なく、また、中枢側
の血圧は、湧くなり、末梢血圧を充分に維持することが
できなかった。Outer diameter tri 4.9 tm, tube thickness 0.55m+, i(
The hardness was 68 on the Fores hardness scale. The blood flow in this example was 0.32 t/min, which was lower than in Example We, and the central blood pressure rose, making it impossible to maintain sufficient peripheral blood pressure.
比較例３
実施例と同−桐料にて、胴部として外径１２．７謔、管
厚１．６−１硬度６８の管状体をｈす、挿入部として外
径４，９劃、管厚０．５５ｍ、硬度９５の管状体を作り
、ポリカー１げネート製のｊ、＋、９径コネコネクター
厚１ ｍ ）を用いて、胴部と挿入部を辺鯖・してパイ
ノ４スチーープとし、本実施例と同様にして大成を用い
てパイＡスの実験を行った。Comparative Example 3 A tubular body made of the same paulownia material as in Example, with an outer diameter of 12.7 mm and a tube thickness of 1.6-1 and a hardness of 68 mm was used as the body, and a tube with an outer diameter of 4.9 mm as the insertion portion. A tubular body with a thickness of 0.55 m and a hardness of 95 was made, and using polycarbonate J, +, 9 diameter connectors (1 m thick), the body and insertion part were edged and made into a pino 4 steep. In the same manner as in this example, an experiment on PIAS was conducted using Taisei.
パイノクス血流役が０．４６１１分と本実施例とほぼ同
様であったが、血栓の付着がコネクタ一部及びコネクタ
ーと管状体の段差部分に夫々リング状に認められた。The Pynox blood flow rate was 0.4611 minutes, which was almost the same as in this example, but a ring-shaped thrombus was observed on a portion of the connector and on the stepped portion between the connector and the tubular body.
参考例
外径と管厚を本実施例と同条件とし、胴部と挿入部両端
部分の硬度が同じになるように原料チューブを同材料で
本実施例と同様にして管状体を作成し、実施例と同様に
成人を用いてパイｔ４スを行った。硬度は胴部、挿入部
両端部分ともフォーレス硬度６８であった。The reference exception diameter and tube thickness were set to the same conditions as in this example, and a tubular body was created using the same raw material tube as in this example so that the hardness of the body and both ends of the insertion part were the same. Similar to the example above, a piet4 test was conducted using adults. The hardness of both the body and both end portions of the insertion portion was 68 on the Fores hardness.
本例のチューブでは血管壁への挿入が本実施例に比し、
やや困難であり、縫合も面倒であったが血流量及び血栓
の付着とも本実施例と同様であった。In this example, the tube is inserted into the blood vessel wall more easily than in this example.
Although it was somewhat difficult and the suturing was troublesome, the blood flow and the attachment of thrombi were similar to those in this example.
実施例、比較例１〜３及び参考例の結果を第１衣に示す
。The results of Examples, Comparative Examples 1 to 3, and Reference Examples are shown in the first coating.
第１図は本発明に係る管状体の一例を示す絢１面図であ
り、第２図は池の例を示す断面図である。FIG. 1 is a plan view showing an example of a tubular body according to the present invention, and FIG. 2 is a sectional view showing an example of a pond.
Claims (1)
くして成形した管状体であって、少なくとも胴部の太管
部分から挿入部の細管部分となる部位の管状体の肉厚を
連続的に薄くして形成したことを特徴とする医療用管状
体。 ２、管状体の挿入部を構成する材料の硬度が管状体の胴
部を構成する材料の硬度より大である特許請求の範囲第
１項に記載の医療用管状体。[Scope of Claims] 1. A tubular body formed by making the outer diameter of both end portions of the insertion portion smaller than the outer diameter of the central portion of the body, at least from the thick tube portion of the body to the thin tube portion of the insertion portion. A medical tubular body characterized by being formed by continuously reducing the wall thickness of the tubular body at a portion. 2. The medical tubular body according to claim 1, wherein the hardness of the material constituting the insertion portion of the tubular body is greater than the hardness of the material constituting the body of the tubular body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61038760A JPS62197051A (en) | 1986-02-24 | 1986-02-24 | Medical tubular body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61038760A JPS62197051A (en) | 1986-02-24 | 1986-02-24 | Medical tubular body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62197051A true JPS62197051A (en) | 1987-08-31 |
Family
ID=12534239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61038760A Pending JPS62197051A (en) | 1986-02-24 | 1986-02-24 | Medical tubular body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62197051A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6031743A (en) * | 1983-07-29 | 1985-02-18 | 日本ゼオン株式会社 | Blood bypassing tube |
| JPS60203244A (en) * | 1984-03-26 | 1985-10-14 | 株式会社東海メデイカルプロダクツ | Blood flow bypass tube |
-
1986
- 1986-02-24 JP JP61038760A patent/JPS62197051A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6031743A (en) * | 1983-07-29 | 1985-02-18 | 日本ゼオン株式会社 | Blood bypassing tube |
| JPS60203244A (en) * | 1984-03-26 | 1985-10-14 | 株式会社東海メデイカルプロダクツ | Blood flow bypass tube |
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