JPH0321262A - Living body pipe line expanding tool - Google Patents
Living body pipe line expanding toolInfo
- Publication number
- JPH0321262A JPH0321262A JP1157149A JP15714989A JPH0321262A JP H0321262 A JPH0321262 A JP H0321262A JP 1157149 A JP1157149 A JP 1157149A JP 15714989 A JP15714989 A JP 15714989A JP H0321262 A JPH0321262 A JP H0321262A
- Authority
- JP
- Japan
- Prior art keywords
- balloon
- shape
- expanding tool
- pipe line
- tool body
- 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
- 239000011347 resin Substances 0.000 claims abstract description 11
- 229920005989 resin Polymers 0.000 claims abstract description 11
- 239000012530 fluid Substances 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 15
- 238000010438 heat treatment Methods 0.000 abstract description 5
- 239000004033 plastic Substances 0.000 abstract description 3
- 229920003023 plastic Polymers 0.000 abstract description 3
- 238000001816 cooling Methods 0.000 abstract 2
- 239000000498 cooling water Substances 0.000 abstract 1
- 238000011084 recovery Methods 0.000 description 10
- 239000000463 material Substances 0.000 description 8
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 208000031481 Pathologic Constriction Diseases 0.000 description 4
- 229910001285 shape-memory alloy Inorganic materials 0.000 description 4
- 208000037804 stenosis Diseases 0.000 description 4
- 230000036262 stenosis Effects 0.000 description 4
- 210000004204 blood vessel Anatomy 0.000 description 3
- 239000004606 Fillers/Extenders Substances 0.000 description 2
- 210000000013 bile duct Anatomy 0.000 description 2
- 230000000916 dilatatory effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 210000003238 esophagus Anatomy 0.000 description 2
- 210000000277 pancreatic duct Anatomy 0.000 description 2
- 210000000626 ureter Anatomy 0.000 description 2
- 210000003708 urethra Anatomy 0.000 description 2
- 241000219112 Cucumis Species 0.000 description 1
- 235000015510 Cucumis melo subsp melo Nutrition 0.000 description 1
- FJJCIZWZNKZHII-UHFFFAOYSA-N [4,6-bis(cyanoamino)-1,3,5-triazin-2-yl]cyanamide Chemical compound N#CNC1=NC(NC#N)=NC(NC#N)=N1 FJJCIZWZNKZHII-UHFFFAOYSA-N 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920000636 poly(norbornene) polymer Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L29/00—Materials for catheters, medical tubing, cannulae, or endoscopes or for coating catheters
- A61L29/04—Macromolecular materials
- A61L29/041—Macromolecular materials obtained by reactions only involving carbon-to-carbon unsaturated bonds
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L29/00—Materials for catheters, medical tubing, cannulae, or endoscopes or for coating catheters
- A61L29/04—Macromolecular materials
- A61L29/06—Macromolecular materials obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/10—Balloon catheters
- A61M25/104—Balloon catheters used for angioplasty
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2400/00—Materials characterised by their function or physical properties
- A61L2400/16—Materials with shape-memory or superelastic properties
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/10—Balloon catheters
- A61M2025/1043—Balloon catheters with special features or adapted for special applications
- A61M2025/1086—Balloon catheters with special features or adapted for special applications having a special balloon surface topography, e.g. pores, protuberances, spikes or grooves
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Veterinary Medicine (AREA)
- Public Health (AREA)
- General Health & Medical Sciences (AREA)
- Epidemiology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Heart & Thoracic Surgery (AREA)
- Chemical & Material Sciences (AREA)
- Biophysics (AREA)
- Hematology (AREA)
- Biomedical Technology (AREA)
- Anesthesiology (AREA)
- Engineering & Computer Science (AREA)
- Pulmonology (AREA)
- Child & Adolescent Psychology (AREA)
- Vascular Medicine (AREA)
- Materials For Medical Uses (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Abstract
Description
［産業上の技術分野］
本発明は狭窄した血管、食道、胆管、すい管、尿道、尿
管等の生体管路を拡張する生体管路拡張具に関する。
［従来の技術］
従来、形状記憶合金製の筒状体からなるステントを血管
等に挿入し、その狭窄部を拡張するものが知られている
（例えば、特開昭６３−２６４０７７号公報、特開昭６
４−４６４７７号公報を参照）。この従来のものの場合
、形状記憶合金を用いているため、高い形状回復力があ
り、狭窄部を拡張する力瓜としては有効である。
〔発明が解決しようとする課題］
しかしながら、従来の拡張具にあっては、その拡張具本
体が金属製であるため、柔軟性に欠ける欠点がある。ま
た、発生力量、つまり拡張力量を自由にコントロールす
ることが難しく、その操作性に難点があった。
そこで、本出願人は拡張具本体を形状記憶樹脂（Ｓｈａ
ｐｅ ＭｅＩｌｏｒｙ Ｐｏｌｙｍｅｒ ： Ｓ Ｍ
Ｐ ）で形成し、その拡張具本体の記憶形状を生体管路
を拡張すべき大きさの形状に設定した生体管路拡張具を
出願している（実願昭６３−１０６５０９号）。
しかし、その後の各種実験の結果、拡張具本体を形状記
憶樹脂で形威したものでは、加温に伴う形状回復力、つ
まり拡張力が従来の形状記憶合金からなるものほど大き
くなく、使用状況によってはさらに拡張力を高める必要
性を確認した。また、形状回復力が不十分であると、狭
窄部の形状に沿って形状記憶樹脂が形状回復を行い、狭
窄部をさらに狭窄してしまうことも起り得るため、その
使用上高度の熟練と注意が必要になる。
本発明は上記課題に着目してなされたもので、その目的
とするところは狭窄した生体管路を確実に拡張すること
ができるとともにその拡張形状を調整しやすい安全な生
体管路拡張具を提供することにある。[Industrial Technical Field] The present invention relates to a biological duct dilator for dilating constricted biological ducts such as blood vessels, esophagus, bile duct, pancreatic duct, urethra, and ureter. [Prior Art] Conventionally, it is known that a stent consisting of a cylindrical body made of a shape memory alloy is inserted into a blood vessel or the like to dilate the narrowed part (for example, Japanese Patent Laid-Open No. 63-264077, Kaisho 6
4-46477). In the case of this conventional device, since it uses a shape memory alloy, it has a high shape recovery force and is effective as a melon for dilating a narrowed area. [Problems to be Solved by the Invention] However, in the conventional expansion device, since the expansion device main body is made of metal, there is a drawback that the expansion device lacks flexibility. In addition, it is difficult to freely control the amount of force generated, that is, the amount of expansion force, and there are difficulties in its operability. Therefore, the present applicant made the main body of the dilator using shape memory resin (Sha
pe MeIlory Polymer: S M
An application has been filed (Utility Application No. 106509/1983) for a living body duct expansion device which is formed of P) and whose memorized shape of the body of the expansion device is set to the shape of the size to which the living body duct is to be expanded. However, as a result of various subsequent experiments, it was found that the shape-recovery force, or expansion force, caused by heating of the expander body made of shape-memory resin was not as great as that of conventional shape-memory alloys, and that it depends on the usage conditions. confirmed the need to further increase expansion capacity. In addition, if the shape-recovery force is insufficient, the shape-memory resin may recover its shape along the shape of the stenosis, resulting in further narrowing of the stenosis, so a high degree of skill and care are required when using it. is required. The present invention has been made in view of the above-mentioned problems, and its purpose is to provide a safe biological duct dilator that can reliably dilate a constricted biological duct and also allows easy adjustment of its expanded shape. It's about doing.
【課題を解決する手段および作用］
上記課題を解決するために本発明の生体管路拡張具は、
流体を供給・排出する゛ことにより拡張●収縮可能なバ
ルーンを有し、このバルーン内に加温または冷却した流
体を供給するバルーン付カテーテルと、上記バルーンの
外周に抜け自在に代着されバルーンの拡張かつ加温によ
り軟化しバルーンの拡張かつ冷却でその拡張状態を維持
して硬化する形状記憶樹脂からなる筒状の拡張具本体と
を具備して構成したものである。
したがって、形状記憶樹脂からなる筒状の拡張具本体は
それ自身の形状復元作用で拡張するだけでなく、バルー
ンによる強制的な拡張力を受けて強力に拡張し、硬化す
ることによりその拡張状態に維持される。また、その拡
張する大きさはバルーンに対する流体の供給量を変える
ことにより容易に調整することができる。
【実施例］
第１図から第６図は本発明の第１の実施例を示すもので
ある。第１図は生体管路拡張具の全体構成を示している
。ｆｆｉ１図中１は弾性材料からなるバルーンであり、
このバルーン１は流体供給用カテーテル２の先端に設け
られている。バルーン１の外Ｒ１こは後述する拡張具本
体３が被嵌して装着されている。
また、カテーテル２の基端側部分には分岐部４を介して
注水管路５の導出チューブ５ａと、排水管路６の導出チ
ューブ６ａを接続している。そして、この各導出チュー
ブ５ａ，５ａは図示しない流体源に接続されていて、そ
の流体源より加温した流体、または冷却した流体をカテ
ーテル２を通じて上記バルーン１に供給し、また排出で
きるようになっている。また、上記カテーテル２内には
第３図で示すように注水管路５と排水管路６とが形成さ
れている。さらに、バルーン１を装着したカテーテル２
の先端側部分には第２図で示すように上記注水管路５と
排水管路６とにそれぞれ連通する注入孔７と排水孔８と
が形成され、閉塞状態にある上記バルーン１内に連通し
ている。
上記バルーンｌの外周に装着される上記拡張具本体３の
素材形状はシート状のものであり、第２図および第３図
で示すようにこれを円筒状になるように巻いて構成され
ている。また、その拡張具杢体３の素材は、形状記憶樹
脂からなり、第２図および第３図で示す大径の形状に所
定の温度以上で回復するように設定されている。また、
その材料としては、例えばポリノルボルネン、トランス
−１．４−ポリイソブレン、スチレン・プタジエン共重
合体、ポリウレタン等からなる。そして、所定の形状回
復温度以上ではゴム状態にあり、軟化しながら形状回復
を行い、形状回復温度以下ではプラスチック状態にあり
硬化する。なお、上記形状回復温度は、４０℃〜６０℃
の間で設定する。
次に、この構或の生体管路拡張具を使用するときの動作
を第４図ないし第６図を参考にして説明する。
まず、血管、食道、胆管、すい管、尿道、尿管等の生体
管路にカテーテル２を押入し、第４図で示すように、そ
のバルーン１の部分を狭窄部９内に位置させる。なお、
このときのバルーン１は、第４図で示すごとく、あらか
じめ収縮させておき、このバルーン１の外周には上記拡
張具本体３を密着した状態で巻いておくものとする。そ
の巻き方は、まず形状回復温度以上の温水または温風中
に拡張具本体３を入れて加温することにより軟化させる
。この柔らかい状態で収縮させたバルーン１の外周面に
図示するごとく一部面を重ねるようにして巻く。この状
態で加温を止め、形状回復温度以下に冷却すると、第４
図の形状で比較的固めのプラスチック状になり、バルー
ン１の外周に固定される。この状態での拡張具本体３を
披嵌したバルーン１の部分を、カテーテル２を押し込ん
で狭窄部９まで進める。
ついで、第５図で示すように注水管路５よりバルーン１
内に形状回復温度以上の温水を注入し、また、排水管路
６からはこれを順次排出して温水潅流を行う。これによ
り拡張具本体３はバルーン１を介して温水からの伝熱に
より温度が上昇し、軟化するとともにその記憶形状を囲
復し始める。
また、これと同時に、排水量を絞ることでバルーン１を
拡張した状態に維持することができ、第５図で示すのご
とく、その拡張具本体３自身の拡張形状に復元しようと
する動作とともにバルーン」による拡張作用で狭窄部９
を圧迫して充分に拡張させる。
この状態が得られたら、次に、バルーン１内に上記温水
の代わりに同じ量で形状回復温度以下の冷水を潅流する
。これにより拡張具本体３は冷却して硬化してこの形状
を維持することになる。
この後、第６図で示すごとくバルーン１を収縮させると
、拡張具本体３は拡張した状態で残り、バルーン１のみ
が収縮する。そこで、このバルーン１とともにカテーテ
ル２を抜去する。これにより拡張具本体３のみを生体管
路における狭窄部９に留置し、その狭窄部９を拡張した
状態に維持することができる。
第７図および第８図は本発明の第２の実施例を示すもの
である。この実施例ではその拡張具本体１０のみが上記
第１の実施例のものと異なる。この拡張具本体１０は第
８図で示すように網状管の構造をなして拡張した状態を
記憶形状としたものである。なお、網状のシート構造を
巻いて管状にしてもよい。
そして、この実施例の場合にはその拡張具本体１０を網
状管で構成しているため柔軟性が増すととともに、第７
図で示す縮少した形状から第８図で示す拡張した形状に
復元しやすい。さらに、厚く重なる部分がないため外径
を細くできる。その使用法および動作は上記実施例の場
合と同じである。
第９図および第１０図は本発明の第３の実施例を示すも
のである。この実施例では、第１０図で示すようにその
拡張具本体１１をテープ状（帯状）の形状記憶樹脂素材
を巻回して筒状に形成し、その外径が拡張した構造で記
憶させている。第９図はその拡張具本体１１をカテーテ
ル２のバルーン１の外周に巻装した状態である。その使
用法および動作は上記実施例の場合と同じである。
第１１図および第１２図は本発明の第４の実施例を示す
ものである。この実施例では拡張具本体】２を円筒状に
成型し、その周面部に両端側からそれぞれ他端側近くに
まで入るスリット１３を切り込んで設け、第１２図で示
すようにそのスリット１３を拡げることにより外径を拡
大した形状に記憶させている。第１１図はその拡張具本
体１１を収縮したバルーン１の外周に巻装した状態であ
り、そのスリット１３は閉じている。この使用法および
動作は上記実施例の場合と同じである。
なお、本発明は上記各実施例のものに限定されるもので
はない。また、拡張只本体を加温する手段としてバルー
ン内にヒータ等の電気的加熱手段を設けたものでもよい
。
［発明の効果］
以上説明したように本発明によれば、形状記憶樹脂から
全体的に筒状に形成した拡張具本体はそれ自身の形状復
元作用で拡張するだけでなく、バルーンによる強制的な
拡張力を受けて強力に拡張し、その拡張状態に維持する
ことができる。また、バルーンに供給する流体を調節す
ることによりその拡張する大きさを調整することもでき
る。
このため、狭窄した生体管路を所望の形状に確実に拡張
することができる。そして、安全な生体管路拡張具を提
供することができる。さらに、形状記憶樹脂を素材とし
て使用できるから形状記憶合金を利用するものに比べて
その材料費の低減化を図り、成型により大量生産が可能
であるなど安価な坐体管路拡張具を提供できる。[Means and effects for solving the problems] In order to solve the above problems, the biological duct dilator of the present invention has the following features:
A balloon-equipped catheter has a balloon that can be expanded and deflated by supplying and discharging fluid, and supplies heated or cooled fluid into the balloon, and a catheter that is removably attached to the outer periphery of the balloon. The dilator body is comprised of a cylindrical dilator body made of a shape memory resin that softens when expanded and heated, and hardens while maintaining the expanded state when the balloon is expanded and cooled. Therefore, the cylindrical dilator body made of shape memory resin not only expands by its own shape restoring action, but also expands strongly under the forced expansion force of the balloon, and returns to its expanded state by hardening. maintained. Further, the expansion size can be easily adjusted by changing the amount of fluid supplied to the balloon. Embodiment FIGS. 1 to 6 show a first embodiment of the present invention. FIG. 1 shows the overall configuration of the biological channel dilator. ffi1 1 in the figure is a balloon made of elastic material,
This balloon 1 is provided at the tip of a fluid supply catheter 2. The outer R1 of the balloon 1 is fitted with a dilator main body 3, which will be described later. Further, the proximal end portion of the catheter 2 is connected to a lead-out tube 5a of the water injection pipe 5 and a lead-out tube 6a of the drainage pipe 6 via a branch part 4. Each of the lead-out tubes 5a, 5a is connected to a fluid source (not shown), from which heated or cooled fluid can be supplied to the balloon 1 through the catheter 2, and can be discharged. ing. Furthermore, a water injection pipe 5 and a drainage pipe 6 are formed within the catheter 2, as shown in FIG. Furthermore, a catheter 2 with a balloon 1 attached thereto
As shown in FIG. 2, an injection hole 7 and a drainage hole 8 are formed in the distal end of the balloon 1, which communicate with the water injection pipe 5 and the drainage pipe 6, respectively, and communicate with the inside of the balloon 1 in the closed state. are doing. The material shape of the dilator main body 3 attached to the outer periphery of the balloon l is a sheet-like material, which is wound into a cylindrical shape as shown in FIGS. 2 and 3. . Further, the material of the expander body 3 is made of shape memory resin, and is set to recover to the large diameter shape shown in FIGS. 2 and 3 at a predetermined temperature or higher. Also,
Examples of the material include polynorbornene, trans-1,4-polyisobrene, styrene-putadiene copolymer, polyurethane, and the like. Above a predetermined shape recovery temperature, the material is in a rubber state and recovers its shape while softening, and below a shape recovery temperature it is in a plastic state and hardens. Note that the shape recovery temperature mentioned above is 40°C to 60°C.
Set between. Next, the operation when using the living body channel dilator having this structure will be explained with reference to FIGS. 4 to 6. First, the catheter 2 is pushed into a biological duct such as a blood vessel, esophagus, bile duct, pancreatic duct, urethra, or ureter, and the balloon 1 is positioned within the stenosis 9 as shown in FIG. In addition,
At this time, the balloon 1 is deflated in advance as shown in FIG. 4, and the dilator main body 3 is tightly wrapped around the outer circumference of the balloon 1. To wrap it, first, the dilator main body 3 is placed in hot water or hot air at a temperature higher than the shape recovery temperature and heated to soften it. The deflated balloon 1 is wrapped in a soft state so that the balloon 1 is partially overlapped with the outer peripheral surface of the balloon 1 as shown in the figure. If you stop heating in this state and cool it below the shape recovery temperature, the fourth
It is made of relatively hard plastic in the shape shown in the figure, and is fixed to the outer periphery of the balloon 1. In this state, the catheter 2 is pushed into the portion of the balloon 1 with the dilator main body 3 fitted thereon, and the catheter 2 is advanced to the stenosis 9. Next, as shown in FIG. 5, the balloon 1 is
Hot water at a temperature higher than the shape recovery temperature is injected into the container, and the water is sequentially discharged from the drain pipe 6 to perform hot water perfusion. As a result, the temperature of the dilator main body 3 rises due to heat transfer from the hot water via the balloon 1, softens it, and begins to recover its memorized shape. At the same time, the balloon 1 can be maintained in an expanded state by restricting the amount of water discharged, and as shown in FIG. Due to the expansion action of
Apply pressure to fully expand it. When this state is obtained, next, the same amount of cold water below the shape recovery temperature is perfused into the balloon 1 instead of the hot water. As a result, the expander main body 3 is cooled and hardened to maintain this shape. Thereafter, when the balloon 1 is deflated as shown in FIG. 6, the dilator main body 3 remains in an expanded state and only the balloon 1 is deflated. Then, the catheter 2 is removed together with the balloon 1. Thereby, only the dilator main body 3 can be placed in the narrowed part 9 of the biological duct, and the narrowed part 9 can be maintained in an expanded state. 7 and 8 show a second embodiment of the present invention. In this embodiment, only the extension main body 10 differs from that of the first embodiment. As shown in FIG. 8, this dilator main body 10 has a reticular tube structure and has a memorized shape when expanded. Note that the net-like sheet structure may be rolled into a tubular shape. In the case of this embodiment, since the dilator main body 10 is composed of a reticular tube, flexibility is increased, and the seventh
It is easy to restore the contracted shape shown in the figure to the expanded shape shown in FIG. Furthermore, since there are no thick, overlapping parts, the outer diameter can be made thinner. Its usage and operation are the same as in the embodiments described above. FIGS. 9 and 10 show a third embodiment of the present invention. In this embodiment, as shown in FIG. 10, the expander main body 11 is formed into a cylindrical shape by winding a tape-like (band-like) shape-memory resin material, and the outer diameter is memorized with an expanded structure. . FIG. 9 shows a state in which the dilator main body 11 is wrapped around the outer circumference of the balloon 1 of the catheter 2. Its usage and operation are the same as in the embodiments described above. FIGS. 11 and 12 show a fourth embodiment of the present invention. In this embodiment, the extender body 2 is formed into a cylindrical shape, and slits 13 are cut into the circumferential surface of the extender body from both ends to near the other end, and the slits 13 are widened as shown in FIG. As a result, a shape with an expanded outer diameter is memorized. FIG. 11 shows the expander body 11 wrapped around the deflated balloon 1, with the slit 13 closed. Its usage and operation are the same as in the embodiments described above. Note that the present invention is not limited to the above embodiments. Furthermore, an electric heating means such as a heater may be provided inside the balloon as means for heating the expansion body. [Effects of the Invention] As explained above, according to the present invention, the expander main body, which is formed entirely into a cylindrical shape from shape memory resin, not only expands by its own shape restoring action, but also expands due to the force exerted by the balloon. It can expand strongly in response to expansion forces and maintain that expanded state. Furthermore, by adjusting the fluid supplied to the balloon, the amount of expansion can be adjusted. Therefore, it is possible to reliably expand a constricted biological duct into a desired shape. In addition, a safe biological duct dilator can be provided. Furthermore, since shape memory resin can be used as a material, the material costs are lower than those using shape memory alloys, and mass production is possible through molding, making it possible to provide an inexpensive ischial canal dilator. .
第１図ないし第６図は本発明の第１の実施例を示し、第
１図はその全体の側面図、第２図は先端部付近の側断面
図、第３図は先端部付近の縦断面図、第４図（Ａ）、第
５図（Ａ）、および第６図（Ａ）はそれぞれ拡張作用時
の手順を示す説明図、第４図（Ｂ）、第５図（Ｂ）、お
よび第６図（Ｂ）はｍ４図（Ａ）、第５図（Ａ）、およ
び第６図（Ａ）におけるそれぞれのｘ−Ｘ線に沿う断面
図、第７図および第８図はそれぞれ本発明の第２の実施
例を示すその先端部付近の側面図、第９図および第１０
図はそれぞれ本浄明の第３の実施例を示すその先端部付
近の側面図、第１１図および第１２図はそれぞれ本発明
の第４の実施例を示すその先端部付近の側如図である。
１・・・バルーン、２・・・カテーテル、３・・・拡張
具本体、５・・・注水管路、６・・・排水管路、１０・
・・拡張具本体、１１・・・拡張具本体、１２・・・拡
張具本体。1 to 6 show a first embodiment of the present invention, FIG. 1 is a side view of the whole, FIG. 2 is a side sectional view near the tip, and FIG. 3 is a longitudinal sectional view near the tip. The top view, FIG. 4(A), FIG. 5(A), and FIG. 6(A) are explanatory diagrams showing the procedure during expansion, respectively, FIG. 4(B), FIG. 5(B), and Fig. 6(B) is a sectional view taken along the x- FIGS. 9 and 10 are side views of the vicinity of the tip of the second embodiment of the invention; FIGS.
The figures are side views of the vicinity of the tip of the third embodiment of the present invention, and Figures 11 and 12 are side views of the vicinity of the tip of the fourth embodiment of the present invention. be. DESCRIPTION OF SYMBOLS 1...Balloon, 2...Catheter, 3...Dilator main body, 5...Water injection pipe, 6...Drainage pipe, 10.
... Extension tool main body, 11... Extension tool main body, 12... Extension tool main body.
Claims (1)
ーンを有し、このバルーン内に加温または冷却した流体
を供給するバルーン付カテーテルと、上記バルーンの外
周に抜け自在に嵌着されバルーンの拡張かつ加温により
軟化しバルーンの拡張かつ冷却で拡張状態を維持して硬
化する形状記憶樹脂からなる筒状の拡張具本体とを具備
したことを特徴とする生体管路拡張具。A balloon-equipped catheter has a balloon that can be expanded and deflated by supplying and discharging fluid, and supplies heated or cooled fluid into the balloon; and a balloon-equipped catheter that is removably fitted around the outer circumference of the balloon and expands the balloon. A living body channel dilator comprising: a cylindrical dilator main body made of a shape memory resin that softens when heated, expands the balloon, maintains the expanded state and hardens when cooled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1157149A JPH0321262A (en) | 1989-06-20 | 1989-06-20 | Living body pipe line expanding tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1157149A JPH0321262A (en) | 1989-06-20 | 1989-06-20 | Living body pipe line expanding tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0321262A true JPH0321262A (en) | 1991-01-30 |
Family
ID=15643248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1157149A Pending JPH0321262A (en) | 1989-06-20 | 1989-06-20 | Living body pipe line expanding tool |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0321262A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03155869A (en) * | 1989-11-01 | 1991-07-03 | Schneider Europ Ag | Stent and stent introducing catheter |
| JPH05184685A (en) * | 1991-07-03 | 1993-07-27 | Ind Res Bv | Ring or cylinder for locally holding or reinforcing intracorporeal conduit, in particular |
| JPH05208050A (en) * | 1992-01-31 | 1993-08-20 | Kanegafuchi Chem Ind Co Ltd | Balloon outer diameter adjusting tool for dilatation catheter, dilatation catheter having the same and method of using the dilatation catheter |
| WO1995020992A1 (en) * | 1994-02-07 | 1995-08-10 | Kabushikikaisya Igaki Iryo Sekkei | Stent device and stent supply system |
| US5599291A (en) * | 1993-01-04 | 1997-02-04 | Menlo Care, Inc. | Softening expanding ureteral stent |
| US5762625A (en) * | 1992-09-08 | 1998-06-09 | Kabushikikaisha Igaki Iryo Sekkei | Luminal stent and device for inserting luminal stent |
| US6045568A (en) * | 1991-03-08 | 2000-04-04 | Igaki; Keiji | Luminal stent, holding structure therefor and device for attaching luminal stent |
| USRE38653E1 (en) * | 1991-03-08 | 2004-11-16 | Kabushikikaisha Igaki Iryo Sekkei | Luminal stent, holding structure therefor and device for attaching luminal stent |
| JP2008518641A (en) * | 2003-06-13 | 2008-06-05 | ネモサイエンス、ゲーエムベーハー | Biodegradable stent |
| JP2010530788A (en) * | 2007-06-22 | 2010-09-16 | アイコン メディカル コーポレーション | Heatable induction device |
-
1989
- 1989-06-20 JP JP1157149A patent/JPH0321262A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03155869A (en) * | 1989-11-01 | 1991-07-03 | Schneider Europ Ag | Stent and stent introducing catheter |
| US6045568A (en) * | 1991-03-08 | 2000-04-04 | Igaki; Keiji | Luminal stent, holding structure therefor and device for attaching luminal stent |
| USRE38653E1 (en) * | 1991-03-08 | 2004-11-16 | Kabushikikaisha Igaki Iryo Sekkei | Luminal stent, holding structure therefor and device for attaching luminal stent |
| JPH05184685A (en) * | 1991-07-03 | 1993-07-27 | Ind Res Bv | Ring or cylinder for locally holding or reinforcing intracorporeal conduit, in particular |
| JPH05208050A (en) * | 1992-01-31 | 1993-08-20 | Kanegafuchi Chem Ind Co Ltd | Balloon outer diameter adjusting tool for dilatation catheter, dilatation catheter having the same and method of using the dilatation catheter |
| US5762625A (en) * | 1992-09-08 | 1998-06-09 | Kabushikikaisha Igaki Iryo Sekkei | Luminal stent and device for inserting luminal stent |
| US5599291A (en) * | 1993-01-04 | 1997-02-04 | Menlo Care, Inc. | Softening expanding ureteral stent |
| WO1995020992A1 (en) * | 1994-02-07 | 1995-08-10 | Kabushikikaisya Igaki Iryo Sekkei | Stent device and stent supply system |
| US5817100A (en) * | 1994-02-07 | 1998-10-06 | Kabushikikaisya Igaki Iryo Sekkei | Stent device and stent supplying system |
| KR100342025B1 (en) * | 1994-02-07 | 2003-03-15 | 가부시키가이샤 이가키 이료 세케이 | Stent Device and Stent Supply System |
| JP2008518641A (en) * | 2003-06-13 | 2008-06-05 | ネモサイエンス、ゲーエムベーハー | Biodegradable stent |
| JP2010530788A (en) * | 2007-06-22 | 2010-09-16 | アイコン メディカル コーポレーション | Heatable induction device |
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