JPH0779985A - Embolectomy catheter - Google Patents
Embolectomy catheterInfo
- Publication number
- JPH0779985A JPH0779985A JP5252087A JP25208793A JPH0779985A JP H0779985 A JPH0779985 A JP H0779985A JP 5252087 A JP5252087 A JP 5252087A JP 25208793 A JP25208793 A JP 25208793A JP H0779985 A JPH0779985 A JP H0779985A
- Authority
- JP
- Japan
- Prior art keywords
- catheter
- embolus
- blade
- head
- wire
- 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
- 238000013156 embolectomy Methods 0.000 title description 4
- 208000005189 Embolism Diseases 0.000 claims abstract description 38
- 210000004204 blood vessel Anatomy 0.000 abstract description 16
- 239000013013 elastic material Substances 0.000 abstract description 5
- 230000002093 peripheral effect Effects 0.000 abstract description 3
- 230000002792 vascular Effects 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 6
- 230000010102 embolization Effects 0.000 description 5
- 239000004033 plastic Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 210000004369 blood Anatomy 0.000 description 3
- 239000008280 blood Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 239000004677 Nylon Substances 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 2
- 229920006362 Teflon® Polymers 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 210000004185 liver Anatomy 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 210000001539 phagocyte Anatomy 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 210000003743 erythrocyte Anatomy 0.000 description 1
- 210000003746 feather Anatomy 0.000 description 1
- 229920002457 flexible plastic Polymers 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
Landscapes
- Surgical Instruments (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は塞栓切除カテーテルに関
する。詳しくは、カテーテルの先端部に配置され、該カ
テーテルに内挿されたワイヤーの回転が塞栓切除ヘッド
に伝えられ、該ヘッドの回転によって血管内壁に沈着し
た粥腫のような硬質の塞栓を除去するための塞栓切除カ
テーテルに関する。FIELD OF THE INVENTION The present invention relates to embolectomy catheters. Specifically, the rotation of the wire inserted in the catheter and inserted into the catheter is transmitted to the embolus excision head, and the rotation of the head removes a hard embolus such as an atheromatous deposit on the inner wall of the blood vessel. For an embolization catheter.
【０００２】[0002]
【従来の技術】従来の塞栓切除カテーテルの切除ヘッド
は全体が硬質の切削材料、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によって構成されていた。2. Description of the Related Art The cutting head of a conventional embolization cutting catheter is constructed entirely of a hard cutting material, for example, an egg-shaped stainless steel body in which diamond powder is embedded.
【０００３】[0003]
【発明が解決しようとする課題】従来の塞栓切除カテー
テルの切削ヘッドは、全体が硬質の切削材料によって構
成されていたので、高速回転させながら、曲折した血管
内に挿入する時、血管壁穿孔のおそれがあった。Since the cutting head of a conventional embolization catheter is entirely made of a hard cutting material, when it is inserted into a bent blood vessel while being rotated at a high speed, the cutting head of the blood vessel wall is not cut off. There was a fear.
【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、本発明の塞栓切除カテーテルはカテーテルと、該
カテーテルに内挿されたワイヤーと、該カテーテルの先
端部において該ワイヤーと接続する塞栓切除ヘッドより
なり、該塞栓切除ヘッドは半円状の弾性材料製の羽根
と、該羽根の外周部を残して該羽根を包囲する切削部材
と、該羽根の基部を支持する円盤状のベースとよりな
る。In order to solve the above-mentioned problems, the embolus excision catheter of the present invention comprises a catheter, a wire inserted into the catheter, and an embolus connected to the wire at the distal end of the catheter. The embolus cutting head includes a semicircular blade made of an elastic material, a cutting member that surrounds the blade while leaving the outer peripheral portion of the blade, and a disk-shaped base that supports the base of the blade. Consists of.
【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
に本発明の塞栓切除カテーテルを挿入し、本発明の塞栓
切除ヘッドを回転させながら曲折した血管内を前進させ
ると、半円状の弾性材料製の羽根は硬質の塞栓によって
内側に変形するので血管に衝撃を与えずに血管内を通過
することができ、血管壁穿孔あるいは血管損傷のおそれ
はない。塞栓は該内側に変形した羽根の前進に伴う該切
削部材との衝突によって切削／乳化され、血管系を循環
し、食細胞に吸収され肝臓を経て体外に排出されか、あ
るいは切削された塞栓片は該カテーテルの基端部に設け
れれた吸引手段によって体外に排出される。When the embolus excision catheter of the present invention is inserted into a blood vessel whose inner wall is almost occluded by an embolus, and the embolus excision head of the present invention is rotated to advance in a bent blood vessel, a semicircular elastic material is used. Since the blades of (1) are deformed inward by a hard embolus, they can pass through the blood vessel without impacting the blood vessel, and there is no risk of perforation of the blood vessel wall or damage to the blood vessel. The embolus is cut / emulsified by the collision with the cutting member accompanying the advance of the inwardly deformed blade, circulates in the vascular system, is absorbed by phagocytes, and is discharged from the body via the liver, or the embolus piece is cut. Is discharged out of the body by suction means provided at the proximal end of the catheter.
【０００６】[0006]
【実施例】以下、本発明の塞栓切除カテーテルの実施例
を図面を参照して説明する。図１は本発明の塞栓切除カ
テーテルの要部を示す一部切欠側面図、図２は該カテー
テルの正面図である。本発明の塞栓切除カテーテルは、
カテーテル１と、該カテーテル１に内挿されたワイヤー
２と、該カテーテル１の先端部において該ワイヤー２と
接続する塞栓切除ヘッド３とよりなり、該ヘッド３は半
円状の弾性材料製の羽根３１と、該羽根３１の外周部を
残して該羽根を包囲する切削部材３２と、該羽根３１の
基部を支持する円盤状のベース３３とよりなり、該カテ
ーテル１に内挿されたワイヤー２の外部駆動による回転
が該カテーテル１の先端部に設けられた該塞栓切除ヘッ
ド３に伝えられる構成となっている。該カテーテル１
は、例えばポリ塩化ビニル、ナイロン、ポリウレタン、
テフロンのような血液適合性の優れたプラスチック製で
ある。該ワイヤー２は、例えば細いステンレス鋼製であ
り、回転時の該カテーテル１の内壁との摩擦による該内
壁の損傷を避けるため、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い。該羽根３１は、例えばシ
リコーンゴムのような血液適合性の優れた弾性プラスチ
ック製であり、図２に示されるような｜状の羽根に限定
されず、＋状、あるいは均等に配置された３枚羽根など
とすることもできる。該切削部材３２は、例えばポリ塩
化ビニル、ナイロン、ポリウレタン、テフロンのような
血液適合性の優れた弾性プラスチック材料、あるいはス
テンレス鋼などの硬質材料に、例えばダイアモンド粉な
どの切削粉を埋め込んだ鑢状部材であり、図示の半球状
に限定されることなく、リング状などとすることもで
き、接着等の手段によって羽根に固定される。臨床的に
対象血管が脆いと診断された時、該弾性プラスチック材
料をベースとした切削部材の使用が適当であり、柔軟で
あると診断された時、該硬質材料をベースとした切削部
材の使用が適当である。該羽根３１の基部を支持する円
盤状のベース３３は、該羽根３１と一体成型されること
が望ましく、該ベース３３によって該切削部材３２の基
部を固定／支持することもできる。内壁に塞栓が沈着し
た血管内に、本発明の塞栓切除カテーテルを挿入し、該
切除ヘッド３を回転させながら前進させると、半円状の
弾性材料製の羽根３１は曲折した血管に衝撃を与えず
に；すなわち、血管壁穿孔あるいは血管損傷を生じるこ
となくスムーズに血管内を通過する。該通過時に、該羽
根３１は塞栓との接触によって内側に変形し、該切削部
材３２は硬質の塞栓と当接し、該塞栓は切削される。該
塞栓切除ヘッドの回転数が１分間に１８万ないし１９万
である時、塞栓は切削／乳化され、該乳化塞栓の粒度は
赤血球よりも小さくなり、食細胞に吸収され肝臓を経て
体外に排出され、該回転数が５００ないし２，０００の
時、切削された塞栓片は該カテーテル１の基端部に設け
られた図示されていない吸引手段によって体外に排出さ
れる。Embodiments of the embolus excision catheter of the present invention will be described below with reference to the drawings. FIG. 1 is a partially cutaway side view showing an essential part of an embolus excision catheter of the present invention, and FIG. 2 is a front view of the catheter. The embolectomy catheter of the present invention,
It is composed of a catheter 1, a wire 2 inserted in the catheter 1, and an embolus excision head 3 connected to the wire 2 at the distal end of the catheter 1, and the head 3 is made of a semicircular elastic blade. 31 and a cutting member 32 that surrounds the outer periphery of the blade 31 and a disk-shaped base 33 that supports the base of the blade 31, and the wire 2 inserted into the catheter 1. The rotation driven by external drive is transmitted to the embolus excision head 3 provided at the distal end of the catheter 1. The catheter 1
Is, for example, polyvinyl chloride, nylon, polyurethane,
It is made of plastic with excellent blood compatibility such as Teflon. The wire 2 is made of, for example, thin stainless steel, and may be covered with a flexible plastic in order to avoid damage to the inner wall of the catheter 1 due to friction with the inner wall of the catheter 1 during rotation. The blade 31 is made of elastic plastic having excellent blood compatibility such as silicone rubber, and is not limited to the | -shaped blade as shown in FIG. It can also be a feather. The cutting member 32 is made of, for example, an elastic plastic material having excellent blood compatibility such as polyvinyl chloride, nylon, polyurethane, or Teflon, or a hard material such as stainless steel in which cutting powder such as diamond powder is embedded. The member is not limited to the hemispherical shape shown in the drawing, but may be in the shape of a ring or the like, and is fixed to the blade by means of adhesion or the like. When the target blood vessel is clinically diagnosed to be brittle, it is appropriate to use the cutting member based on the elastic plastic material, and when it is diagnosed to be flexible, the cutting member based on the hard material is used. Is appropriate. The disk-shaped base 33 that supports the base of the blade 31 is preferably integrally molded with the blade 31, and the base of the cutting member 32 can be fixed / supported by the base 33. When the embolus excision catheter of the present invention is inserted into a blood vessel having an embolus deposited on its inner wall and is advanced while rotating the excision head 3, the blades 31 made of a semi-circular elastic material impact the bent blood vessel. Without; that is, it passes smoothly through the blood vessel without causing vascular wall perforation or vessel damage. During the passage, the blade 31 is deformed inward by contact with the embolus, the cutting member 32 comes into contact with the hard embolus, and the embolus is cut. When the number of revolutions of the embolus excision head is 180,000 to 190,000 per minute, the embolus is cut / emulsified, the particle size of the emulsified embolus becomes smaller than that of red blood cells, and the embolus is absorbed by phagocytes and discharged from the body via the liver. When the number of rotations is 500 to 2,000, the cut embolus piece is discharged out of the body by the suction means (not shown) provided at the proximal end of the catheter 1.
【０００７】[0007]
【発明の効果】本発明の塞栓切除カテーテルは上記のよ
うな構成となっているので、血管壁穿孔あるいは血管損
傷を生じることなく、塞栓を除去することができる。Since the embolus excision catheter of the present invention is constructed as described above, the embolus can be removed without causing perforation of the blood vessel wall or damage to the blood vessel.
【図１】本発明の塞栓切除カテーテルの要部を示す一部
切欠側面図FIG. 1 is a partially cutaway side view showing a main part of an embolization catheter of the present invention.
【図２】本発明の塞栓切除カテーテルの正面図FIG. 2 is a front view of the embolization catheter of the present invention.
１はカテーテル、２はワイヤー、３は塞栓切除ヘッド、
３１は羽根、３２は切削部材、３３はベース。1 is a catheter, 2 is a wire, 3 is an embolectomy head,
31 is a blade, 32 is a cutting member, and 33 is a base.
Claims (1)
たワイヤーと、該カテーテルの先端部において該ワイヤ
ーと接続する塞栓切除ヘッドとよりなり、該塞栓切除ヘ
ッドは半円状の弾性材料製の羽根と、該羽根の外周部を
残して該羽根を包囲する切削部材と、該羽根の基部を支
持する円盤状のベースとよりなることを特徴とする塞栓
切除カテーテル。1. A catheter, a wire inserted in the catheter, and an embolus cutting head connected to the wire at the distal end of the catheter, the embolus cutting head being made of a semicircular elastic blade. An embolus excision catheter, comprising: a cutting member that surrounds the outer periphery of the blade, and a disc-shaped base that supports the base of the blade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5252087A JPH0779985A (en) | 1993-09-01 | 1993-09-01 | Embolectomy catheter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5252087A JPH0779985A (en) | 1993-09-01 | 1993-09-01 | Embolectomy catheter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0779985A true JPH0779985A (en) | 1995-03-28 |
Family
ID=17232371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5252087A Pending JPH0779985A (en) | 1993-09-01 | 1993-09-01 | Embolectomy catheter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0779985A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1557128A1 (en) | 2004-01-23 | 2005-07-27 | Cathenet Corporation | Atherectomy head and atherectomy catheter using the same |
| WO2013146203A1 (en) * | 2012-03-28 | 2013-10-03 | テルモ株式会社 | Medical treatment instrument |
-
1993
- 1993-09-01 JP JP5252087A patent/JPH0779985A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1557128A1 (en) | 2004-01-23 | 2005-07-27 | Cathenet Corporation | Atherectomy head and atherectomy catheter using the same |
| WO2013146203A1 (en) * | 2012-03-28 | 2013-10-03 | テルモ株式会社 | Medical treatment instrument |
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