JPH07407A - Embolism eliminating catheter - Google Patents
Embolism eliminating catheterInfo
- Publication number
- JPH07407A JPH07407A JP5040388A JP4038893A JPH07407A JP H07407 A JPH07407 A JP H07407A JP 5040388 A JP5040388 A JP 5040388A JP 4038893 A JP4038893 A JP 4038893A JP H07407 A JPH07407 A JP H07407A
- Authority
- JP
- Japan
- Prior art keywords
- housing
- catheter
- embolus
- groove
- diameter
- 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
- 208000005189 Embolism Diseases 0.000 title claims abstract description 38
- 210000004204 blood vessel Anatomy 0.000 abstract description 15
- 239000008280 blood Substances 0.000 abstract description 8
- 210000004369 blood Anatomy 0.000 abstract description 8
- 239000000498 cooling water Substances 0.000 description 6
- 239000010935 stainless steel Substances 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 230000037430 deletion Effects 0.000 description 3
- 238000012217 deletion Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910001069 Ti alloy Inorganic materials 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 206010003210 Arteriosclerosis Diseases 0.000 description 1
- 208000037260 Atherosclerotic Plaque Diseases 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 230000017531 blood circulation Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 230000003073 embolic effect Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 229920002457 flexible plastic Polymers 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- -1 polyethylene terephthalate Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Surgical Instruments (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は塞栓削除カテーテルに関
する。詳しくは、バルーンカテーテルに内挿されたワイ
ヤーの回転によって該カテーテルの先端部に設けられた
ドリル状の円錐状部を駆動し、該円錐状部の回転によっ
て血管内壁に石灰化して沈着した粥腫のような硬質の塞
栓を削除し、削除された塞栓片を鑢部で微粒化し、体外
に排出するための塞栓削除カテーテルに関する。FIELD OF THE INVENTION This invention relates to embolus removal catheters. Specifically, by rotating a wire inserted in a balloon catheter, a drill-shaped conical portion provided at the distal end of the catheter is driven, and by the rotation of the conical portion, an atheroma that has been calcified and deposited on the inner wall of the blood vessel. The present invention relates to an embolus removal catheter for removing a hard embolus such as the above, atomizing the removed embolus piece at the filed portion, and discharging the atomized particle outside the body.
【０００２】[0002]
【従来の技術】従来の塞栓削除カテーテルの塞栓削除ヘ
ッドの先端部は単に、切削材料、例えばダイアモンド粉
を埋め込んだ卵形のステンレス鋼体、あるいは鑢状鋼体
によって構成されていた。2. Description of the Related Art The tip of the embolus removal head of a conventional embolus removal catheter is simply made of a cutting material, for example, an egg-shaped stainless steel body or diamond-shaped steel body in which diamond powder is embedded.
【０００３】[0003]
【発明が解決しようとする課題】従来の塞栓削除カテー
テルの塞栓削除ヘッドは上記のように構成されていたの
で、削除された塞栓片が微粒化されず、該カテーテルの
極細のルーメン内を通過する時の流抵抗が大となり、該
カテーテルの下流側から吸引しても、該塞栓片の一部が
血管の下流側に流入し、毛細血管を閉塞する危険性があ
った。Since the embolus removal head of the conventional embolus removal catheter is constructed as described above, the removed embolus pieces are not atomized and pass through the ultrafine lumen of the catheter. There was a risk that the flow resistance at that time would be large, and even if suction was made from the downstream side of the catheter, a part of the embolic piece would flow into the downstream side of the blood vessel and block the capillaries.
【０００４】[0004]
【課題を解決するための手段】上記の課題を解決するた
めに、本発明の塞栓削除カテーテルは剛性ヘッドと、フ
レキシブルな回転駆動ワイヤと、剛性ハウジングと、バ
ルーンカテーテルと、ストッパ手段とよりなり；該剛性
ヘッドは先端が面取りされ、螺旋状の溝を備えたドリル
状の円錐状部と、該円錐状部に続き、該溝と接続する溝
を備えた円柱状縮径部と、該縮径部に続き、さらに縮径
した円柱状鑢部と、該鑢部に続き、該縮径部と同径であ
り、該溝と同方向の溝を備えた案内部とが一体化された
構成であり；該ワイヤは該案内部の基端面に固定され
て、該カテーテルに内挿され；該ハウジングは該縮径部
から該案内部までを包囲し、該ハウジングの先端面は該
円錐状部の基端面に当接し、該ハウジングの先端領域の
外径は該基端面の直径と同じであり、該先端領域に一体
的に続く領域は該先端領域と同じ外径関係で該カテーテ
ルの先端部と接続する接続部を構成し、該先端面から該
案内部の基端面に至る範囲の内径は該縮径部および該案
内部の外径と同じであり；該カテーテルは該ハウジング
の該接続部に固定され；該ストッパ手段は前記ハウジン
グを基準として、該ヘッドの前進後退を禁止する構成と
なっている。In order to solve the above problems, the embolus removal catheter of the present invention comprises a rigid head, a flexible rotary drive wire, a rigid housing, a balloon catheter and stopper means; The rigid head has a chamfered tip, a drill-like conical portion having a spiral groove, a cylindrical reduced diameter portion having a groove connected to the conical portion and the groove, and the reduced diameter. And a guide portion having a groove that has the same diameter as the reduced diameter portion and that has the same direction as the reduced diameter portion. Yes; the wire is fixed to the proximal end surface of the guide section and inserted into the catheter; the housing surrounds the reduced diameter section to the guide section, and the distal end surface of the housing is the conical section. Abutting on the base end face, the outer diameter of the distal end region of the housing is And a region integrally following the distal end region constitutes a connecting portion that connects with the distal end portion of the catheter in the same outer diameter relationship as the distal end region, and extends from the distal end surface to the proximal end surface of the guide portion. The inner diameter of the range is the same as the outer diameters of the reduced diameter portion and the guide portion; the catheter is fixed to the connection portion of the housing; the stopper means prohibits the forward and backward movement of the head with respect to the housing. It is configured to do.
【０００５】[0005]
【作用】内壁が塞栓によってほとんど閉塞された血管内
に本発明の塞栓削除カテーテルを挿入し、該ヘッドを回
転させながら前進させると、剛性材料製のドリル状の該
円錐状部によって塞栓は血管内壁から削除され、バルー
ンカテーテルの基端側に設けられた吸引手段によって、
削除された塞栓片は該円錐状部と該縮径部に設けられた
溝を経て該ハウジングと該鑢部との間のスペースに流入
し、該塞栓片は該鑢部の回転によって微粒化され、該微
粒化された塞栓は流抵抗が低いので極細のカテーテルル
ーメン内をスムーズに流れて完全に体外に排出される。
上記の削除操作に際し、該ヘッドの先端が面取りされて
おり、血管は柔軟であるので該塞栓削除の衝撃によって
血管が損傷を受けることはない。When the embolus removal catheter of the present invention is inserted into a blood vessel whose inner wall is almost occluded by the embolus and the head is advanced while rotating, the embolism is caused by the drill-shaped conical portion made of a rigid material. Removed by the suction means provided on the proximal side of the balloon catheter,
The removed embolus piece flows into the space between the housing and the file part through the groove formed in the conical part and the reduced diameter part, and the embolus piece is atomized by the rotation of the file part. Since the atomized embolus has a low flow resistance, it smoothly flows through the ultrafine catheter lumen and is completely discharged outside the body.
At the time of the above-described deletion operation, the tip of the head is chamfered and the blood vessel is flexible, so that the blood vessel is not damaged by the impact of the embolus deletion.
【０００６】[0006]
【実施例】図１は本発明の塞栓削除カテーテルの要部を
示す一部切欠側面図である。図示のように、本発明のカ
テーテルは一体化された剛性ヘッド１と、フレキシブル
な回転駆動ワイヤ２と、剛性ハウジング３と、フレキシ
ブルなバルーンカテーテル４と、ストッパ手段５とより
なる。該剛性ヘッド１は例えば、血液適合性に優れたチ
タニウム合金、ステンレス鋼、あるいはポリカーボネー
トのような硬質プラスチックによって構成され、先端が
面取りされたドリル状の円錐状部１１と、該円錐状部１
１に続き、縮径した円柱状縮径部１２と、該縮径部１２
に続き、さらに縮径した円柱状鑢部１３と、該鑢部１３
に続き、該縮径部１２と同径の案内部１４とよりなる。
該円錐状部１１には螺旋状の溝１５が設けられ、該溝１
５は該縮径部１２に設けられた溝１６に接続し、該案内
部１４にも同様な溝１７が設けられる。該鑢部１３は表
面にダイアモンド粉などの切削材を埋め込んだ構成であ
ってもよく、また該鑢部１３に対向する該ハウジング３
の内面を鑢状３１とすることもできる。該ワイヤ２は例
えば、細いステンレス鋼製であり、該ワイヤとの接触に
よる該カテーテルの内壁の損傷を防止するため、フレキ
シブルなプラスチックによって被覆されていてもよく、
該案内部１４の基端面に固定される。該剛性ハウジング
３は例えば、血液適合性に優れたチタニウム合金、ステ
ンレス鋼、あるいはポリカーボネートのような硬質プラ
スチックによって構成され、該縮径部１２から該案内部
１４までを包囲し、該ハウジング３の先端面は該円錐状
部１１の基端面に当接し、該ハウジング３の先端領域の
外径は該基端面の直径と同じであり、該先端領域に一体
的に続く領域は該先端領域と同じ外径関係で該カテーテ
ル４の先端部と接続する接続部を構成し、該先端面から
該案内部の基端面に至る範囲の内径は該縮径部１２およ
び該案内部１４の外径と同じである。一般にゴム製のバ
ルーン４１を備えた該カテーテル４の本体は例えば、血
液適合性に優れたポリ塩化ビニル、ナイロン、ポリウレ
タン、テフロン、ポリエチレンテレフタレートのような
プラスチックによって構成され、該ハウジング３の先端
領域と同じ外径関係で該接続部に固定される。例えば、
図示のように該カテーテル４の先端部は外径が縮径した
該ハウジング３の接続部に外嵌固定され、該ワイヤ２を
包囲する。該ストッパ手段５は図示のように該縮径部１
２の外周に設けられた環状のリブと、該ハウジング３に
設けられ、該リブと当接して該リブを収容するスペース
によって構成されることが好ましいが、該ハウジング３
を基準として、該ヘッド１の前進後退を禁止する他の任
意の手段を採用することができる。さらに、該鑢部１３
と該ハウジング３との間に構成されたスペースと連通す
る冷却水供給ルーメン４２を該ハウジング３と該カテー
テル４の肉厚内に設けることもできる。本発明の塞栓削
除カテーテルを使用して塞栓を除去するには、血流を停
止させ、血管内を前進させることができる程度に、図示
されない該カテーテル４の肉厚内に設けられたルーメン
経由で、例えば生食を該バルーン４１に注入／膨張させ
た状態で、内壁に塞栓が沈着した血管内に該カテーテル
４を挿入し、図示されないモーターによって該ワイヤ２
経由で該ヘッド１を５００ないし２０，０００ＲＰＭの
スピードで回転させながら前進させる。硬質の塞栓は該
円錐状部１１のドリル状の歯面によって削除されるが、
該円錐状部１１の先端が面取りされており、かつ該削除
による衝撃は柔軟な血管によって緩和されるので、血管
が損傷を受けることはない。該カテーテル４の基端側に
設けられた図示されない吸引手段によって該塞栓の削除
片は該溝１５、１６を経て該鑢部１３と該ハウジング３
との間のスペースに流入し、該鑢部１３の回転によって
微粒化されるので該カテーテル４の極細のルーメン内の
流抵抗が低くなり、該微粒は該案内部１４の溝１７と該
ルーメン内を経て血液と一緒に完全に体外に排出され、
該塞栓の削除片の一部が下流側の血管内に流入すること
はない。また、前記のように、該鑢部１３に対向する該
ハウジング３の内面を鑢状３１とし、該鑢部１３の回転
による遠心力によって該ハウジング３の内面に衝突した
微粒化塞栓をさらに微粒化させることもできる。さら
に、該ヘッド１と該ハウジング３との摺動摩擦による発
熱を防止するため、該摺動摩擦面に血液適合性の優れた
シリコーンオイルを付与したり、あるいは該鑢部１３と
該ハウジング３との間に構成されたスペースに前記冷却
水供給用のルーメン４２経由で、図示されない冷却水源
から冷却水を供給し、前記吸引手段によって血液および
微粒化された塞栓と一緒に体外に排出することもでき
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a partially cutaway side view showing an essential part of an embolus removal catheter of the present invention. As shown, the catheter of the present invention comprises an integrated rigid head 1, a flexible rotary drive wire 2, a rigid housing 3, a flexible balloon catheter 4 and stopper means 5. The rigid head 1 is made of, for example, a hard alloy such as titanium alloy, stainless steel, or polycarbonate having excellent blood compatibility, and has a chamfered drill-like conical portion 11 and the conical portion 1.
1, the columnar reduced diameter portion 12 having a reduced diameter, and the reduced diameter portion 12
And the cylindrical filed portion 13 with a further reduced diameter, and the filed portion 13
Then, the reduced diameter portion 12 and the guide portion 14 having the same diameter are formed.
The conical portion 11 is provided with a spiral groove 15, and the groove 1
5 is connected to the groove 16 provided in the reduced diameter portion 12, and the guide portion 14 is also provided with a similar groove 17. The file portion 13 may have a structure in which a cutting material such as diamond powder is embedded in the surface, and the housing 3 facing the file portion 13
It is also possible to form the file 31 on the inner surface. The wire 2 is, for example, made of thin stainless steel, and may be covered with a flexible plastic to prevent damage to the inner wall of the catheter due to contact with the wire,
It is fixed to the base end surface of the guide portion 14. The rigid housing 3 is made of, for example, a hard alloy such as titanium alloy, stainless steel, or polycarbonate having excellent blood compatibility, and surrounds the reduced diameter portion 12 to the guide portion 14, and the tip of the housing 3 The surface abuts the proximal end surface of the conical portion 11, the outer diameter of the distal end region of the housing 3 is the same as the diameter of the proximal end surface, and the region integrally following the distal end region has the same outer diameter as the distal end region. A connecting portion that connects to the distal end portion of the catheter 4 is formed in a radial relationship, and the inner diameter in the range from the distal end surface to the proximal end surface of the guide portion is the same as the outer diameters of the reduced diameter portion 12 and the guide portion 14. is there. The body of the catheter 4, which is generally provided with a rubber balloon 41, is made of, for example, a plastic such as polyvinyl chloride, nylon, polyurethane, Teflon, or polyethylene terephthalate having excellent blood compatibility. It is fixed to the connection part with the same outer diameter relationship. For example,
As shown in the figure, the distal end of the catheter 4 is externally fitted and fixed to the connecting portion of the housing 3 having a reduced outer diameter, and surrounds the wire 2. The stopper means 5 is provided with the reduced diameter portion 1 as shown.
It is preferable that the housing 3 is formed by an annular rib provided on the outer circumference of 2 and a space provided in the housing 3 and abutting the rib to accommodate the rib.
Based on the above, other arbitrary means for prohibiting the forward and backward movement of the head 1 can be adopted. Further, the file portion 13
A cooling water supply lumen 42 communicating with a space formed between the housing 3 and the housing 3 may be provided in the wall thickness of the housing 3 and the catheter 4. To remove an embolus using the embolus removal catheter of the present invention, the blood flow can be stopped and the blood vessel can be advanced in the blood vessel via a lumen (not shown) provided in the thickness of the catheter 4. For example, in a state where saline is infused / inflated into the balloon 41, the catheter 4 is inserted into a blood vessel having an embolus deposited on the inner wall, and the wire 2 is driven by a motor (not shown).
The head 1 is advanced while rotating at a speed of 500 to 20,000 RPM. The hard embolus is removed by the drilled tooth flank of the cone 11.
Since the tip of the conical portion 11 is chamfered and the impact due to the deletion is mitigated by the flexible blood vessel, the blood vessel is not damaged. The removal piece of the embolus is passed through the grooves 15 and 16 by the suction means (not shown) provided on the proximal end side of the catheter 4 and the file portion 13 and the housing 3
Flows into the space between the inner wall and the inner wall of the catheter 4 and is atomized by the rotation of the filed portion 13. Therefore, the flow resistance in the ultrafine lumen of the catheter 4 is reduced, and the fine particles are in the groove 17 of the guide portion 14 and in the lumen. Is completely excreted from the body along with blood,
A part of the removed piece of the embolus does not flow into the blood vessel on the downstream side. In addition, as described above, the inner surface of the housing 3 facing the file portion 13 is formed into a file 31, and the atomized emboli that have collided with the inner surface of the housing 3 by the centrifugal force due to the rotation of the file portion 13 are further atomized. You can also let it. Further, in order to prevent heat generation due to sliding friction between the head 1 and the housing 3, silicone oil having excellent blood compatibility is applied to the sliding friction surface, or between the file portion 13 and the housing 3. It is also possible to supply cooling water from a cooling water source (not shown) to the space configured as above via the cooling water supply lumen 42 and discharge the cooling water to the outside of the body together with the blood and the atomized embolus by the suction means.
【０００７】[0007]
【発明の効果】本発明の塞栓削除カテーテルは上記のよ
うな構成となっているので、血管壁を傷めることなく、
塞栓を除去することができ、塞栓片の一部が下流側の血
管内に流入する恐れもない。Since the embolus removal catheter of the present invention has the above-mentioned structure, it does not damage the blood vessel wall.
The embolus can be removed, and there is no risk that part of the embolus piece will flow into the blood vessel on the downstream side.
【図１】本発明の塞栓削除カテーテルの要部の一部切欠
側面図FIG. 1 is a partially cutaway side view of a main part of an embolus removal catheter of the present invention.
１はヘッド、１１は円錐状部、１２は縮径部、１３は鑢
部、１４は案内部、１５、１６、１７は溝、２はワイ
ヤ、３はハウジング、３１は鑢面、４はバルーンカテー
テル、４１はバルーン、４２は冷却水供給ルーメン、５
はストッパ手段。1 is a head, 11 is a conical part, 12 is a reduced diameter part, 13 is a filed part, 14 is a guide part, 15, 16 and 17 are grooves, 2 is a wire, 3 is a housing, 31 is a filed surface, 4 is a balloon Catheter, 41 balloon, 42 cooling water supply lumen, 5
Is a stopper means.
Claims (2)
ワイヤと、剛性ハウジングと、バルーンカテーテルと、
ストッパ手段とよりなり；該剛性ヘッドは先端が面取り
され、螺旋状の溝を備えたドリル状の円錐状部と、該円
錐状部に続き、該溝と接続する溝を備えた円柱状縮径部
と、該縮径部に続き、さらに縮径した円柱状鑢部と、該
鑢部に続き、該縮径部と同径であり、該溝と同方向の溝
を備えた案内部とが一体化された構成であり；該ワイヤ
は該案内部の基端面に固定されて、該カテーテルに内挿
され；該ハウジングは該縮径部から該案内部までを包囲
し、該ハウジングの先端面は該円錐状部の基端面に当接
し、該ハウジングの先端領域の外径は該基端面の直径と
同じであり、該先端領域に一体的に続く領域は該先端領
域と同じ外径関係で該カテーテルの先端部と接続する接
続部を構成し、該先端面から該案内部の基端面に至る範
囲の内径は該縮径部および該案内部の外径と同じであ
り；該カテーテルは該ハウジングの該接続部に固定さ
れ；該ストッパ手段は前記ハウジングを基準として、該
ヘッドの前進後退を禁止する構成であることを特徴とす
る塞栓削除カテーテル。1. A rigid head, a flexible rotary drive wire, a rigid housing, a balloon catheter,
The rigid head has a chamfered tip and has a drill-shaped conical portion having a spiral groove, and a cylindrical reduced diameter having a groove that follows the conical portion and is connected to the groove. A portion, a columnar hull portion further reduced in diameter following the reduced diameter portion, and a guide portion provided with a groove having the same diameter as the reduced diameter portion and in the same direction as the groove following the filed portion. Integrated structure; the wire is fixed to the proximal end face of the guide portion and inserted into the catheter; the housing surrounds the reduced diameter portion to the guide portion, and the distal end surface of the housing Is in contact with the proximal end surface of the conical portion, the outer diameter of the distal end region of the housing is the same as the diameter of the proximal end face, and the region integrally following the distal end region has the same outer diameter relationship as the distal end region. A connecting portion that connects to the distal end portion of the catheter is formed, and the inner diameter in the range from the distal end surface to the proximal end surface of the guide portion is the reduced diameter. And the outer diameter of the guide portion; the catheter is fixed to the connection portion of the housing; the stopper means is configured to prohibit the head from moving forward and backward with respect to the housing. An embolus removal catheter.
鑢状となっていることを特徴とする塞栓削除カテーテ
ル。2. An embolus removal catheter, wherein an inner surface of the housing facing the file portion has a file shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5040388A JPH07407A (en) | 1993-01-20 | 1993-01-20 | Embolism eliminating catheter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5040388A JPH07407A (en) | 1993-01-20 | 1993-01-20 | Embolism eliminating catheter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07407A true JPH07407A (en) | 1995-01-06 |
Family
ID=12579278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5040388A Pending JPH07407A (en) | 1993-01-20 | 1993-01-20 | Embolism eliminating catheter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07407A (en) |
-
1993
- 1993-01-20 JP JP5040388A patent/JPH07407A/en active Pending
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