JP2538375B2 - Balloon catheter - Google Patents
Balloon catheterInfo
- Publication number
- JP2538375B2 JP2538375B2 JP2050361A JP5036190A JP2538375B2 JP 2538375 B2 JP2538375 B2 JP 2538375B2 JP 2050361 A JP2050361 A JP 2050361A JP 5036190 A JP5036190 A JP 5036190A JP 2538375 B2 JP2538375 B2 JP 2538375B2
- Authority
- JP
- Japan
- Prior art keywords
- balloon
- catheter shaft
- catheter
- electrode
- blood vessel
- 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.)
- Expired - Lifetime
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- Media Introduction/Drainage Providing Device (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は血管、特に心臓血管用カテーテルの中で動
脈硬化等による血管の狭窄部を拡張するためのバルーン
カテーテルに関する。Description: TECHNICAL FIELD The present invention relates to a blood vessel, particularly a balloon catheter for expanding a narrowed portion of a blood vessel due to arteriosclerosis or the like in a cardiovascular catheter.
血管の狭窄部をバルーンカテーテルを用いて治療する
方法として、動脈硬化等による狭窄部位で常温下にてバ
ルーンを加圧膨張させて機械的に血管の狭窄部を伸展拡
張し、血流を改善させることが行われている。As a method of treating a stenosis of a blood vessel using a balloon catheter, a balloon is pressurized and expanded at room temperature at a stenosis due to arteriosclerosis, etc. to mechanically extend and expand the stenosis of the blood vessel to improve blood flow. Is being done.
上記従来技術においては、機械的圧力でのみ、硬化し
た血管壁を伸展させるため血管の内弾性板を断裂させ、
解離性動脈瘤や穿孔を合併することがある。In the above prior art, only by mechanical pressure, to tear the inner elastic plate of the blood vessel to extend the hardened blood vessel wall,
May be associated with dissecting aneurysm or perforation.
又一時的に狭窄部の拡張に成功しても、約35％の症例
で血管平滑筋の異常増殖による再狭窄をきたすことが報
告されている。It has been reported that even if the stenosis is temporarily expanded, about 35% of the cases cause restenosis due to abnormal proliferation of vascular smooth muscle.
そこで、本発明は狭窄部を加圧と同時に、高周波によ
る誘電加熱（dielectric heating）することにより、硬
化した血管壁を構成する蛋白質を変性させて、血管の壁
の可塑性を高め、拡張を良好に行い、更に血管平滑筋を
焼灼することより再狭窄を防止することを目的とする。Therefore, in the present invention, by simultaneously applying pressure to the stenosis and subjecting the protein constituting the hardened blood vessel wall to denaturation by dielectric heating by high frequency, the plasticity of the blood vessel wall is increased and good dilation is achieved. The purpose is to prevent restenosis by cauterizing the vascular smooth muscle.
本発明によれば、樹脂より成る中空のカテーテルシャ
フト（１）と、該カテーテルシャフトの外周を包囲し、
先端側の一部を薄膜状としてバルーン（２）とした樹脂
より成るチューブ（2A）と、上記バルーン内の上記カテ
ーテルシャフトの外周に螺旋状に巻装した高周波通電用
の電極（３）と、上記チューブと上記カテーテルシャフ
トとの間に上記バルーンへ液体を供給または吸引する送
液路（５）と、上記カテーテルシャフトに沿って設置さ
れ上記電極に電気的に接続されるリード線（４）と、カ
テーテルシャフトに支持された温度コントロール用の温
度センサーを備えた事を特徴とする血管用のバルーンカ
テーテルが構成される。According to the present invention, a hollow catheter shaft (1) made of resin and surrounding the outer circumference of the catheter shaft,
A tube (2A) made of a resin having a balloon (2) with a part of the distal end side formed into a thin film, and an electrode (3) for high-frequency current spirally wound around the outer circumference of the catheter shaft in the balloon, A liquid supply path (5) for supplying or sucking a liquid to the balloon between the tube and the catheter shaft, and a lead wire (4) installed along the catheter shaft and electrically connected to the electrode. A balloon catheter for a blood vessel is provided, which is provided with a temperature sensor for temperature control supported by a catheter shaft.
上記構成によって、血管狭窄部を高周波通電法によっ
て加熱された状態でバルーンを膨張させるようにしたも
のである。With the above structure, the balloon is inflated while the blood vessel stenosis is heated by the high-frequency energization method.
以下、本発明を添付図面を参照して説明する。 Hereinafter, the present invention will be described with reference to the accompanying drawings.
本発明の一実施例の主要部の断面図である第１図Ａ
と、そのＢ−Ｂ線及びＣ−Ｃ線に沿った拡大断面図であ
る第１図Ｂ及びＣに於て、（CA）はバルーンカテーテル
を全体として示し、（１）は例えばポリエチレン製で、
外径約1mmの中空のカテーテルシャフトであり、管腔（1
A）を有し、その内部に後述のガイドワイヤー（GW）の
挿入が可能である。FIG. 1A is a cross-sectional view of the main part of one embodiment of the present invention.
In FIGS. 1B and 1C, which are enlarged cross-sectional views taken along line B-B and line C-C, (CA) shows the balloon catheter as a whole, and (1) is made of polyethylene, for example.
It is a hollow catheter shaft with an outer diameter of approximately 1 mm, and has a lumen (1
A) has a guide wire (GW), which will be described later, can be inserted therein.
このカテーテルシャフト（１）の先端部（1B）の外周
には、膨張および収縮が可能なポリエチレン製で筒状の
バルーン（２）が設けられている。尚、ポリエチレンは
誘導体損失が少なく、高周波による誘電体加熱を施して
も、比較的加熱されにくい。中空のカテーテルシャフト
（１）及びバルーン（２）は、この様な材質とするのが
好ましい。（３）は前記バルーン（２）の内に於てその
中央部のカテーテルシャフト（１）の外周に設けられた
高周波通電用の電極であり、この電極（３）は例えば外
径1.2mm、内径1.0mm、長さ10mmの管状をなし、Ｘ線不透
過マーカともなる高周波に対する伝導性の高い金属材
料、例えばプラチナから形成されている。また、バルー
ン（２）は、カテーテルフャフト（１）の略々全長にわ
たってその外周の包囲する如く形成したポリエチレン製
のチューブ（2A）の一部の厚さを薄くすることにより形
成される。尚、バルーン（２）の先端部（1c）をカテー
テルシャフト（１）の外周に液密状に固着する。チュー
ブ（2A）とカテーテルシャフト（１）との間の間隙に送
液路（５）が形成される。この断面環状の送液路（５）
の一端は、バルーン（２）に連通され、その他端は図示
しない送液及び吸引用ポンプに後述のチューブ（TU）を
介して接続されている。A cylindrical balloon (2) made of polyethylene capable of expansion and contraction is provided on the outer periphery of the distal end portion (1B) of the catheter shaft (1). It should be noted that polyethylene has little derivative loss and is relatively hard to be heated even when dielectric heating is performed by high frequency. The hollow catheter shaft (1) and the balloon (2) are preferably made of such a material. (3) is an electrode for high-frequency electricity provided in the outer periphery of the catheter shaft (1) at the center of the balloon (2). The electrode (3) has an outer diameter of 1.2 mm and an inner diameter, for example. It has a tubular shape with a length of 1.0 mm and a length of 10 mm, and is made of a metal material having high radio frequency conductivity which also serves as an X-ray opaque marker, such as platinum. The balloon (2) is formed by thinning a part of a polyethylene tube (2A) formed so as to surround the outer circumference of the catheter chaft (1) over substantially the entire length thereof. The tip portion (1c) of the balloon (2) is fixed to the outer circumference of the catheter shaft (1) in a liquid-tight manner. A liquid feed path (5) is formed in the gap between the tube (2A) and the catheter shaft (1). This liquid delivery path (5) with an annular cross section
One end is connected to the balloon (2), and the other end is connected to a liquid supply and suction pump (not shown) via a tube (TU) described later.
したがって、ポンプを動作させ、後述の液体を送液路
（５）を通じてバルーン（２）に供給、又は吸引すれ
ば、このバルーン（２）を膨張又は収縮させることがで
きるようになっている。また、カテーテルシャフト
（１）とチューブ（2A）との間のギャップには、被覆さ
れたリード線（４）が挿入され、電極（３）に電気的に
接続されている。Therefore, the balloon (2) can be inflated or deflated by operating the pump and supplying or sucking a liquid (described later) to the balloon (2) through the liquid feeding path (5). A covered lead wire (4) is inserted into the gap between the catheter shaft (1) and the tube (2A) and electrically connected to the electrode (3).
本発明のこの例を用いた治療状態を示す第２図におい
て、高周波発生器（６）の出力端子は、リード線
（４），（4A）を介し、血管内に挿入されたカテーテル
シャフト（１）のバルーン（２）内の電極（３）と、被
治療者（Ａ）の外部に配置した電極（３）と対をなす電
極板（3A）とに夫々接続されている。高周波出力を決
め、通電時間を設定して電極（３）と電極板（3A）とに
高周波電位をかけると、誘電損失率の小さいバルーン
（２）の膜と接触する誘電損失率の大きい血管壁の狭窄
部に電界が放射されて、狭窄部が局所的に加熱される。
これは比較的高い周波数（例えば、13.56MHz、27.12MH
z、40.68MHz）を要する。In FIG. 2 showing a treatment state using this example of the present invention, the output terminal of the high frequency generator (6) is connected to the catheter shaft (1) inserted into the blood vessel via the lead wires (4) and (4A). 2) is connected to the electrode (3) in the balloon (2) and the electrode plate (3A) which is paired with the electrode (3) arranged outside the patient (A). When the high frequency output is determined, the energization time is set, and the high frequency potential is applied to the electrode (3) and the electrode plate (3A), the vessel wall with a high dielectric loss rate that contacts the membrane of the balloon (2) with a low dielectric loss rate An electric field is radiated to the narrowed portion, and the narrowed portion is locally heated.
This is a relatively high frequency (eg 13.56MHz, 27.12MH
z, 40.68MHz).
つぎに、第３図Ａを参照して上記バルーン（２）を有
するバルーンカテーテル（CA）を用いて血管（７）の狭
窄部位（7A）を拡張する場合について説明する。Next, with reference to FIG. 3A, a case of expanding the stenosis site (7A) of the blood vessel (7) using the balloon catheter (CA) having the balloon (2) will be described.
まず、第３図Ａに示すように、ガイドワイヤー（GW）
を用いてバルーンカテーテル（CA）（バルーン（２）を
有するカテーテル）を経皮的に血管（７）に挿入し、カ
テーテルシャフト（１）の先端部（1B）のバルーン
（２）を狭窄部位（7A）に位置させたならば、上述のポ
ンプによりバルーン（２）内に、例えばイオン性造影剤
（イオキサグレード）を供給し、これを加圧する一方、
高周波発生器（６）からの高周波電圧を前記電極（３）
及び電極板（3A）の間に加える。すると、上述の如くバ
ルーン（２）と接する狭窄部（7A）を局所的に加熱しな
がら膨張させることができる。First, as shown in FIG. 3A, the guide wire (GW)
A balloon catheter (CA) (catheter having a balloon (2)) is percutaneously inserted into a blood vessel (7) using a catheter, and the balloon (2) at the distal end (1B) of the catheter shaft (1) is stenotic ( 7A), the above pump is used to supply, for example, an ionic contrast agent (ioxa grade) into the balloon (2) and pressurize it.
A high frequency voltage from a high frequency generator (6) is applied to the electrode (3).
And between the electrode plates (3A). Then, as described above, the narrowed portion (7A) in contact with the balloon (2) can be locally heated and expanded.
人体模型による実験では、13.56MHzの周波数にて、出
力40Wにて30秒間の通電で、狭窄部（7A）を約60℃に加
熱することができる。そして、狭窄部（7A）が硬化して
いる場合でも、それを加熱することにより、その蛋白質
を変性させ、血管の可塑性を高め、第４図に示す如く、
血管（７）の狭窄部（7A）を拡張することが容易とな
り、同時に血管平滑筋を焼灼して再狭窄を予防する。In the experiment using a human body model, the constriction (7A) can be heated to about 60 ° C. at a frequency of 13.56 MHz and an output of 40 W for 30 seconds. And even when the stenosis (7A) is hardened, it is heated to denature the protein and enhance the plasticity of blood vessels, as shown in FIG.
It becomes easy to expand the narrowed part (7A) of the blood vessel (7) and at the same time cauterizes the vascular smooth muscle to prevent restenosis.
尚、狭窄部（7A）が、第４図に示す如く、拡張した
ら、バルーン（２）内の液体を吸引し、バルーン（２）
を収縮させ、バルーンカテーテル（CA）を血管（７）よ
り完全に取り除く。When the stenosis (7A) expands, as shown in FIG. 4, the liquid in the balloon (2) is sucked and the balloon (2) is sucked.
Deflate and completely remove the balloon catheter (CA) from the blood vessel (7).
尚、第３図ＡのＢ−Ｂ線上の拡大断面図である第３図
Ｂに示す如く、バルーンカテーテル（CA）の先端部（1
B）とは反対側の端部の近傍は、チューブ（2A）の内周
面と中空のカテーテルシャフト（１）の外周面とに亘っ
て、両者に液密状に環状の仕切膜（PW）が固着され、送
液路（５）は液密状態となされている。但し、この場
合、仕切膜（PW）の一部に開口（AP）が設けられ、これ
にチューブ（TU）の一端開口が液密に固定され、その他
端開口は、図示せずもポンプに連通されている。又、リ
ード線（４）もこの仕切膜（PW）を液密状に貫通してい
る。As shown in FIG. 3B which is an enlarged cross-sectional view taken along the line BB of FIG. 3A, the distal end portion (1) of the balloon catheter (CA) is
The vicinity of the end opposite to B) extends over the inner peripheral surface of the tube (2A) and the outer peripheral surface of the hollow catheter shaft (1) to form a liquid-tight annular partition membrane (PW) on both sides. Are fixed, and the liquid supply path (5) is in a liquid-tight state. However, in this case, an opening (AP) is provided in a part of the partition membrane (PW), and one end opening of the tube (TU) is liquid-tightly fixed to this, and the other end opening communicates with the pump (not shown). Has been done. The lead wire (4) also penetrates the partition film (PW) in a liquid-tight manner.
上述の本発明の実施例に於て、バルーン（２）内のカ
テーテルシャフト（１）の一部に、例えば、熱電対等の
温度センサー（８）を第５図に示す如く設けることも出
来る。この様な構成にすることにより、血管（７）の狭
窄部（7A）を加熱して拡張する際、対象とする狭窄部
（7A）の温度を正確にコントロールすることが出来る。In the above-described embodiment of the present invention, a part of the catheter shaft (1) inside the balloon (2) may be provided with a temperature sensor (8) such as a thermocouple as shown in FIG. With such a configuration, when the narrowed portion (7A) of the blood vessel (7) is heated and expanded, the temperature of the target narrowed portion (7A) can be accurately controlled.
又、上述の実施例に於ては、管状の電極（３）を用い
たが、第６図示に示す如く、この管状の電極（３）の代
わりに、高周波に対する伝導性が良く、柔軟性に富む材
料より成る、ワイヤー（3C）をバルーン（２）内のカテ
ーテルシャフト（１）の外周に螺旋状に数回巻装して、
それを電極としてもよい。かくすれば、カテーテルシャ
フト（１）の柔軟性をそのまま維持することができ、バ
ルーンカテーテル（CA）の血管（７）への挿入が容易に
なる。Further, in the above-mentioned embodiment, the tubular electrode (3) is used, but as shown in FIG. 6, instead of this tubular electrode (3), it has good conductivity for high frequencies and flexibility. A wire (3C) made of rich material is wound around the outer circumference of the catheter shaft (1) in the balloon (2) several times in a spiral shape,
It may be used as an electrode. In this way, the flexibility of the catheter shaft (1) can be maintained as it is, and the balloon catheter (CA) can be easily inserted into the blood vessel (7).
なお、本発明は上記実施例に限定されるものではな
く、本発明の要旨の範囲内において種々の変化変更が可
能であり、例えば本発明のバルーンカテーテルは心臓不
整脈に対するカテーテル焼灼治療にも適用できる。The present invention is not limited to the above-mentioned embodiments, and various changes and modifications are possible within the scope of the present invention. For example, the balloon catheter of the present invention can be applied to catheter ablation treatment for cardiac arrhythmia. .
本発明は血管拡張用のバルーンの内部に高周波通電用
のワイヤー状の電極が設けられており、血管内外から高
周波による電界を放射することで、血管の狭窄部を加熱
しながら加圧することにより、狭窄部の拡張を良好に行
える。又、高周波通電用の電極をワイヤー状にしたこと
で、カテーテルシャフトの柔軟性を維持できるので、バ
ルーンカテーテルの血管への挿入が容易にできる。The present invention is provided with a wire-shaped electrode for high-frequency energization inside the balloon for vasodilation, by radiating an electric field by high frequency from inside and outside the blood vessel, by applying pressure while heating the narrowed portion of the blood vessel, The narrowed portion can be expanded well. In addition, since the high-frequency current-carrying electrode is formed in a wire shape, the flexibility of the catheter shaft can be maintained, so that the balloon catheter can be easily inserted into the blood vessel.
又、バルーン内の温度センサーにより、狭窄部の温度
を測定しながらそこを加熱できるので、安全性も高い。Further, since the temperature sensor in the balloon can heat the constricted portion while measuring the temperature, the safety is high.
第１図A,B及びＣは夫々本発明の一実施例のバルーンカ
テーテルの主要部の断面図、第２図はその治療に於ける
使用状態を示す略線図、第３図Ａ及びＢはその治療状態
に於ける一部を断面とする斜視図及び断面図、第４図は
その使用後の状態を示す断面図、第５図および第６図は
夫々本発明の他の実施例を示す図である。 （１）はカテーテルシャフト、（２）はバルーン、
（３）は高周波通電用の電極、（Ａ）は電極板、（3C）
はワイヤー、（４）は被覆されたリード線、（５）は送
液路、（６）は高周波発生器、（７）は血管、（7A）は
血管の狭窄部、（８）は温度センサーである。1A, 1B and 1C are cross-sectional views of a main part of a balloon catheter according to an embodiment of the present invention, FIG. 2 is a schematic diagram showing a use state in its treatment, and FIGS. FIG. 4 is a sectional view showing a state after use, and FIG. 5 and FIG. 6 show other embodiments of the present invention, respectively. It is a figure. (1) is the catheter shaft, (2) is the balloon,
(3) is an electrode for high frequency electricity, (A) is an electrode plate, (3C)
Is a wire, (4) is a coated lead wire, (5) is a liquid supply path, (6) is a high frequency generator, (7) is a blood vessel, (7A) is a stenosis of blood vessels, and (8) is a temperature sensor. Is.
Claims (1)
と、 該カテーテルシャフトの外周を包囲し、先端側の一部を
薄膜状として、バルーンとした樹脂よりなるチューブ
と、 上記バルーン内の上記カテーテルシャフトの外周に螺旋
状に巻装したワイヤー状の高周波通電用と電極と、 上記チューブと上記カテーテルシャフトとの間に上記バ
ルーンへ液体を供給または吸引する送液路と、 上記カテーテルシャフトに沿って設置され、上記電極に
電気的に接続されるリード線と、 上記カテーテルシャフトに支持された温度コントロール
のための温度センサーと、 を備えた事を特徴とする血管拡張用のバルーンカテーテ
ル。1. A hollow catheter shaft made of resin, a tube made of resin which is a balloon which surrounds the outer circumference of the catheter shaft and has a thin film part at the distal end side, and the catheter shaft in the balloon. Wire-shaped high-frequency current-carrying electrodes and electrodes that are spirally wound around the outer periphery, a liquid supply path that supplies or sucks liquid to or from the balloon between the tube and the catheter shaft, and is installed along the catheter shaft. A balloon catheter for vasodilation, comprising: a lead wire electrically connected to the electrode; and a temperature sensor supported by the catheter shaft for temperature control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2050361A JP2538375B2 (en) | 1990-03-01 | 1990-03-01 | Balloon catheter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2050361A JP2538375B2 (en) | 1990-03-01 | 1990-03-01 | Balloon catheter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03251258A JPH03251258A (en) | 1991-11-08 |
| JP2538375B2 true JP2538375B2 (en) | 1996-09-25 |
Family
ID=12856753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2050361A Expired - Lifetime JP2538375B2 (en) | 1990-03-01 | 1990-03-01 | Balloon catheter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2538375B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005060848A1 (en) | 2003-12-22 | 2005-07-07 | Shutaro Satake | High-frequency heating balloon catheter |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2890386B2 (en) * | 1992-04-22 | 1999-05-10 | インター・ノバ株式会社 | Balloon catheter |
| JPH05228215A (en) * | 1992-02-25 | 1993-09-07 | Inter Noba Kk | Blood vessel expanding method |
| JPH07213621A (en) * | 1993-12-09 | 1995-08-15 | Nec Corp | Balloon catheter and percutaneous coronaria forming device using the same |
| JP2003111848A (en) * | 2001-10-05 | 2003-04-15 | Nihon Medix | Heated balloon catheter device and its heating method |
| CN106361426A (en) * | 2015-07-20 | 2017-02-01 | 黄冰生 | Vascular lens-end balloon for arhythmia radiofrequency ablation |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5929734Y2 (en) * | 1981-03-23 | 1984-08-25 | 山本ビニタ−株式会社 | Electrode device for cavity heating for high frequency heating therapy |
| JPS6030226B2 (en) * | 1982-09-17 | 1985-07-15 | インタ−・ノバ株式会社 | High frequency induction heating type heat therapy applicator |
| JPS59135066A (en) * | 1983-01-24 | 1984-08-03 | 呉羽化学工業株式会社 | Medical heating apparatus |
| CA1266412A (en) * | 1984-10-24 | 1990-03-06 | J. Richard Spears | Method and apparatus for angioplasty |
| JPS61284246A (en) * | 1985-06-12 | 1986-12-15 | オリンパス光学工業株式会社 | Heat treatment apparatus for endoscope |
| JPS63174649A (en) * | 1987-01-14 | 1988-07-19 | オリンパス光学工業株式会社 | Stay jig in tubular cavity |
| JPH0268073A (en) * | 1988-09-02 | 1990-03-07 | Inter Noba Kk | Balloon catheter |
-
1990
- 1990-03-01 JP JP2050361A patent/JP2538375B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005060848A1 (en) | 2003-12-22 | 2005-07-07 | Shutaro Satake | High-frequency heating balloon catheter |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03251258A (en) | 1991-11-08 |
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