JP2574119B2 - Balloon catheter - Google Patents
Balloon catheterInfo
- Publication number
- JP2574119B2 JP2574119B2 JP5249421A JP24942193A JP2574119B2 JP 2574119 B2 JP2574119 B2 JP 2574119B2 JP 5249421 A JP5249421 A JP 5249421A JP 24942193 A JP24942193 A JP 24942193A JP 2574119 B2 JP2574119 B2 JP 2574119B2
- Authority
- JP
- Japan
- Prior art keywords
- balloon
- electrode
- wall
- balloon catheter
- catheter
- 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
Links
Description
【０００１】[0001]
【産業上の利用分野】この発明は心臓血管用のバルーン
カテーテルに係わり、特に解離性動脈瘤、冠状動脈ある
いは末梢動脈の動脈硬化病変、不整脈源となる病的な心
房筋や心室筋、心臓弁膜症の狭窄部病変に対して、その
部分を加圧しながら局所的に高周波加温を行うことによ
り病変を局所的に治療するバルーンカテーテルに関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a balloon catheter for a cardiovascular system, and more particularly, to a pathological atrial or ventricular muscle which is a source of arrhythmia, an arteriosclerotic lesion of a coronary artery or a peripheral artery, and a heart valve. The present invention relates to a balloon catheter that locally treats a stenotic lesion of a stenosis by locally performing high-frequency heating while pressurizing the stenotic lesion.
【０００２】[0002]
【従来の技術】従来のバルーンカテーテルでは高周波加
温作用を有するバルーン中心部のシャフトに単極または
双極の電極を設けて病変を治療する方法が採用されてい
た。2. Description of the Related Art In a conventional balloon catheter, a method of treating a lesion by providing a monopolar or bipolar electrode on a shaft at the center of a balloon having a high-frequency heating effect has been adopted.
【０００３】すなわち、図９のその縦断面図に示すよう
に、カテーテル２１の先端部に膨張及び収縮自在なバル
ーン２３を備え、このバルーン２３の内部に高周波加温
用の電極２４を設け、例えば血管閉塞部を電極２４に高
周波を通電して加温させた状態でバルーン２３を膨張さ
せてその部分全体の治療を行うようにする（例えば、特
開平２−６８０７３号公報参照）。[0003] That is, as shown in the longitudinal sectional view of FIG. 9, an inflatable and contractible balloon 23 is provided at the distal end of a catheter 21, and an electrode 24 for high-frequency heating is provided inside the balloon 23. The balloon 23 is inflated while the vascular occlusion is heated by applying a high frequency to the electrode 24 to treat the entire portion (see, for example, JP-A-2-68073).
【０００４】[0004]
【発明が解決しようとする課題】しかし、このような従
来のバルーンカテーテルによる病変の治療方法だと、バ
ルーン全体を加温することとなり、バルーンに接触する
生体組織全体に熱が伝播してしまいバルーンと接触する
組織の特定の部分を選択的に焼灼することはできない。However, according to such a conventional method for treating a lesion using a balloon catheter, the entire balloon is heated, and heat is transmitted to the entire living tissue in contact with the balloon, so that the balloon is heated. It is not possible to selectively cauterize certain parts of the tissue in contact with the tissue.
【０００５】また、照射される高周波はバルーン中心部
の電極より放散されるためバルーンの形状が大きくなり
電極とバルーン接触面との距離が大となると、組織を加
温するのに時間がかかりすぎる欠点があった。Further, since the irradiated high frequency is radiated from the electrode at the center of the balloon, if the shape of the balloon becomes large and the distance between the electrode and the balloon contact surface becomes large, it takes too much time to heat the tissue. There were drawbacks.
【０００６】そのため上記従来のバルーンカテーテルに
おいては解離性大動脈瘤の治療用の形状の大きなバルー
ンを瞬時に加温することはできず、また組織の特定部分
を選択的に焼灼できないため、大動脈分枝を加熱して閉
塞させる危険性があった。また、動脈硬化病変、病的心
臓筋肉あるいは弁膜の交連部のみを選択的に焼灼するこ
とも不可能であった。Therefore, in the above-mentioned conventional balloon catheter, a balloon having a large shape for treating a dissecting aortic aneurysm cannot be instantaneously heated, and a specific portion of tissue cannot be selectively cauterized. There was a risk of blockage due to heating. Also, it was not possible to selectively cauterize only arteriosclerotic lesions, pathological heart muscles, or commissures of the valve.
【０００７】本発明は、このような従来のバルーンカテ
ーテルのもつ問題点に鑑みてなされたもので、バルーン
と接触する組織の一部を局所的に急速に高周波加温して
上記したような病変を治療することができるバルーンカ
テーテルを提供することを目的としている。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the conventional balloon catheter, and has been described in the art. An object of the present invention is to provide a balloon catheter capable of treating the following.
【０００８】[0008]
【課題を解決するための手段】ガイドワイアー通過可能
なカテーテルシャフトの先端部にレジンでできた膨張及
び収縮可能なバルーンを設け、このバルーンの壁内また
は内壁に高周波加温用の電極と温度センサーとを設置し
てバルーンカテーテルを構成する。An inflatable and deflated balloon made of resin is provided at the distal end of a catheter shaft through which a guide wire can pass, and an electrode for high-frequency heating and a temperature sensor are provided inside or on the inner wall of the balloon. Are installed to form a balloon catheter.
【０００９】[0009]
【作用】カテーテルのバルーンを収縮した状態でその先
端に設けたガイドワイアーを用いて病変部へ挿入し、バ
ルーンを膨張させてバルーン壁内または内壁に電極が設
置された部分を病変部へ接触させるとともにバルーン電
極と体表面の対極板との間で所定周波数の高周波電流を
通電する。これにより誘導体であるレジンからなるバル
ーン壁を介して電極と周囲組織との間で高周波電界が生
じ高周波誘導型加熱の原理にしがって病変部が局所的に
加圧されると同時に加熱される。この時、バルーン壁に
設置した温度センサーによりバルーン膜の温度を監視
し、それが適正温度となるよう高周波出力を調節する。In a state where the balloon of the catheter is deflated, it is inserted into the lesion using a guide wire provided at the tip of the catheter, and the balloon is inflated to bring the inside of the balloon wall or the portion where the electrode is installed on the inner wall into contact with the lesion. At the same time, a high-frequency current having a predetermined frequency is applied between the balloon electrode and the counter electrode plate on the body surface. As a result, a high-frequency electric field is generated between the electrode and the surrounding tissue through the balloon wall made of the derivative resin, and the lesion is locally pressurized and heated at the same time according to the principle of high-frequency induction heating. . At this time, the temperature of the balloon membrane is monitored by a temperature sensor installed on the balloon wall, and the high-frequency output is adjusted so that the temperature becomes an appropriate temperature.
【００１０】[0010]
【実施例】以下この発明のバルーンカテーテルの実施例
を添付した図面を用いて説明する。 （実施例１）図１は本発明のバルーンカテーテルの実施
例１を示し解離性大動脈瘤治療用のバルーンカテーテル
に適用した例を示す。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the balloon catheter of the present invention will be described below with reference to the accompanying drawings. (Embodiment 1) FIG. 1 shows Embodiment 1 of a balloon catheter of the present invention and shows an example in which the balloon catheter is applied to a balloon catheter for treating a dissecting aortic aneurysm.
【００１１】図１に示すように、実施例１のバルーンカ
テーテル１はＸ線不透過性のテフロンカテーテルシャフ
ト２を有し、このカテーテルシャフト２内には血管狭窄
部を通過し易いようにガイドワイアー１３が通り、この
カテーテルシャフト２の先端部には膨張及び収縮可能な
材料からなる壁面をもつバルーン３が形成されている。
このバルーン３の形状は患者の大動脈弓の形態に合わせ
て作製されている。このバルーン３壁内または内壁には
図１と図３に示すように、動脈分岐部をさけてその全周
または一部（白地部分には電極はない）にわたって網目
状または膜状の細い電極４が埋設されて組み込まれてい
る。この網目状等の電極４は高周波加温用の電極として
機能する。例えばバルーン３の壁の厚さを０．２ｍｍと
すると、この壁間に０．０５ｍｍ程度の直径をもつ柔軟
性、展延性かつ電導性のある金のようなな素材で電極４
は構成されている。このためバルーン３は自在に膨張及
び収縮できるようになる。また、これらの網目状電極４
のすべての末端は一個所に収束してカテーテルシャフト
２内に装填した高周波電線６に電気的に接続されてい
る。As shown in FIG. 1, a balloon catheter 1 according to a first embodiment has a radiopaque Teflon catheter shaft 2 and a guide wire in the catheter shaft 2 so as to easily pass through a stenosis of a blood vessel. A balloon 3 having a wall surface made of a material that can be expanded and contracted is formed at the distal end of the catheter shaft 2.
The shape of the balloon 3 is made according to the form of the aortic arch of the patient. As shown in FIGS. 1 and 3, a mesh-like or membrane-like thin electrode 4 is provided on the inner wall or the inner wall of the balloon 3 over the entire circumference or a part thereof (there is no electrode on a white background). Is buried and incorporated. The mesh-shaped electrode 4 functions as a high-frequency heating electrode. For example, assuming that the thickness of the wall of the balloon 3 is 0.2 mm, the electrode 4 is made of a flexible, spreadable and conductive material such as gold having a diameter of about 0.05 mm between the walls.
Is composed. Therefore, the balloon 3 can be freely expanded and contracted. In addition, these mesh electrodes 4
Are converged at one point and electrically connected to a high-frequency electric wire 6 loaded in the catheter shaft 2.
【００１２】また、この高周波送電線６は高周波発生装
置９（例えば周波数１３．５６ＭＨＺ）に接続された発
生した高周波電流をバルーン３に埋設した網目状電極４
に伝達できるようになっている。さらにカテーテルシャ
フト２内に設けた送液路を介してバルーン３内にシリン
ジ１１から造影剤を注入してバルーン３を膨張できるよ
うになっている。加えて、バルーン３の壁面の適所には
温度センサー５が取り付けられてこの壁面の温度を検知
し、この温度センサー５に接続された銅線１２を介して
温度モニター１０に接続されバルーン３の壁面の温度を
監視できるようになっている。The high-frequency power transmission line 6 is connected to a high-frequency generator 9 (for example, at a frequency of 13.56 MHZ) to generate a high-frequency current generated by the mesh electrode 4 embedded in the balloon 3.
It can be transmitted to. Further, a contrast medium is injected from the syringe 11 into the balloon 3 through a liquid feed path provided in the catheter shaft 2 so that the balloon 3 can be inflated. In addition, a temperature sensor 5 is attached to an appropriate position on the wall surface of the balloon 3 to detect the temperature of the wall surface, and is connected to a temperature monitor 10 via a copper wire 12 connected to the temperature sensor 5 and is connected to the wall surface of the balloon 3. Temperature can be monitored.
【００１３】一方、高周波発生装置９の他方から出た銅
線８は対極板７に接続されている。この対極板７は生体
の正面側または背面側に装着されて高周波電流を生体内
に流して高周波誘導型加熱方式により治療部の局所加温
するための一方の端子である。On the other hand, a copper wire 8 protruding from the other side of the high frequency generator 9 is connected to the counter electrode plate 7. The return electrode plate 7 is one terminal which is mounted on the front side or the back side of the living body and allows a high-frequency current to flow through the living body to locally heat the treatment section by a high-frequency induction heating method.
【００１４】つぎに、このように構成された本発明の実
施例１のバルーンカテーテルを用いて心臓血管部の病変
を局所的に治療する場合について説明する。Next, a description will be given of a case where a lesion of a cardiovascular portion is locally treated by using the balloon catheter of Embodiment 1 of the present invention thus configured.
【００１５】まず、図１に示すように、大動脈腔中にバ
ルーン３を収縮した状態でガイドワイアー１３を用いて
挿入し、様々な形態の心臓血管腔に合せて作製されたバ
ルーン３内にシリンジ１１から造影剤を注入してバルー
ン３を膨張させ生体組織に接触させる。そしてバルーン
３の壁内あるいは内壁に設置された網目状電極４と対極
板７との間に高周波電線６と銅線８を介して高周波発生
装置９から１０ＭＨＺ以上の高周波を通電する。ここ
で、網目状電極４と対極板７との間にはレジンでできた
バルーン３の膜（内壁）という誘電体が介在しているの
で高周波誘導型加熱が行われることになる。First, as shown in FIG. 1, the balloon 3 is inserted into the aortic cavity using a guide wire 13 in a deflated state, and a syringe is inserted into the balloon 3 prepared for various types of cardiovascular cavities. A contrast agent is injected from 11 to inflate the balloon 3 to bring it into contact with living tissue. Then, a high frequency of 10 MHZ or more is supplied from the high frequency generator 9 via the high frequency electric wire 6 and the copper wire 8 between the mesh electrode 4 and the counter electrode plate 7 installed in the wall or the inner wall of the balloon 3. Here, a high-frequency induction heating is performed between the mesh electrode 4 and the counter electrode plate 7 because a dielectric material such as a film (inner wall) of the balloon 3 made of resin is interposed.
【００１６】この誘電型加熱により、電極４の埋設され
たバルーン３の膜とそれが接触する生体組織とが加温さ
れる。例えば、この生体組織が大動脈壁の場合には、大
動脈壁に発熱が生じる。By this dielectric heating, the membrane of the balloon 3 in which the electrode 4 is embedded and the living tissue with which it is in contact are heated. For example, when the living tissue is an aortic wall, heat is generated in the aortic wall.
【００１７】ここで、この加温温度は数秒間で６０℃以
上に達することになる。このため、例えば解離した大動
脈壁に対してバルーン３の膨張による壁内部からの圧迫
と発熱による熱溶接の相乗作用による解離腔は修復され
閉塞される。Here, the heating temperature reaches 60 ° C. or more in a few seconds. For this reason, for example, the dissociated cavity due to the synergistic effect of the compression of the dissociated aortic wall from inside the wall due to the inflation of the balloon 3 and the heat welding due to heat generation is repaired and closed.
【００１８】この場合、バルーン３の壁面にはその適所
に温度センサー５が設置されているので、この温度セン
サー５により検知されたバルーン３の壁面の温度を温度
モニター１０で監視しつつその温度が適正な温度範囲
（例えば６０℃〜７０℃）なるように、高周波発生装置
９の出力を制御する。これにより過度の加温による生体
組織の蒸散や炭化を防ぐことができるとともに、安全に
解離部の熱溶接が可能となる。また、高周波通電用バル
ーン電極は表面が平滑なレジンでできたバルーンに覆わ
れていて血液や組織と直接接触しないための通電時の血
栓形成が防止される。 （実施例２）図４は心房細動治療用のバルーンカテーテ
ルの実施例であり、図４（ａ）は右房用バルーンまた図
４（ｂ）は左房用バルーンを示す。カテーテルシャフト
２ａの先端部には右房用または左房用に設計され造影像
より得られた形状のバルーン３ａ，３ｂが付設されてい
る。In this case, since the temperature sensor 5 is installed at an appropriate position on the wall surface of the balloon 3, the temperature of the wall surface of the balloon 3 detected by the temperature sensor 5 is monitored by the temperature monitor 10 while the temperature is monitored. The output of the high-frequency generator 9 is controlled so as to be in an appropriate temperature range (for example, 60 ° C. to 70 ° C.). Thereby, transpiration and carbonization of the living tissue due to excessive heating can be prevented, and heat welding of the dissociated portion can be performed safely. Further, the high-frequency energizing balloon electrode is covered with a balloon made of a resin having a smooth surface, so that thrombus formation during energization is prevented because it does not come into direct contact with blood or tissue. (Embodiment 2) FIG. 4 shows an embodiment of a balloon catheter for treating atrial fibrillation. FIG. 4 (a) shows a right atrial balloon and FIG. 4 (b) shows a left atrial balloon. At the distal end of the catheter shaft 2a, balloons 3a and 3b designed for the right or left atria and having a shape obtained from a contrast image are attached.
【００１９】これらのバルーン３ａ，３ｂには心房壁に
通路を形成して心房細動を治療するために心房壁を部分
的に焼灼する線状の電極４ａ，４ｂが埋め込まれてい
る。例えば弁輪部より線状に立ち上る電極４ａは図４
（ａ）に示すように洞結部と房室接合部をさけてまた、
図４（ｂ）に示すように肺静脈をさけて配置されてい
る。この電極に高周波を高周波発生装置より通電すると
心房内が短冊状に焼灼されて心房細動の原因となる興奮
の旋回路の成立を防げるようになる。 （実施例３）図５は本発明を心臓弁膜症の狭窄部の拡張
用に適用した高周波通電焼灼機能をもつバルーンカテー
テルの実施例を示す。ここで、図５（ａ）は狭窄部の縦
断面を、図５（ｂ）はその横断面であって、板状電極を
用いた例を、また、図５（ｃ）は同じくその横断面であ
って板状電極を柵状に配設した実施例を示す。The balloons 3a and 3b have embedded therein linear electrodes 4a and 4b for partially ablating the atrial wall to form a passage in the atrial wall and treat atrial fibrillation. For example, the electrode 4a rising linearly from the valve annulus is shown in FIG.
As shown in (a), avoiding the sinus junction and the atrioventricular junction,
As shown in FIG. 4B, they are arranged so as to avoid the pulmonary veins. When a high frequency is supplied to this electrode from a high frequency generator, the inside of the atrium is cauterized in a strip shape, thereby preventing the formation of a circulating circuit of excitation that causes atrial fibrillation. (Embodiment 3) FIG. 5 shows an embodiment of a balloon catheter having a high-frequency electric ablation function in which the present invention is applied to dilate a stenotic portion of valvular heart disease. Here, FIG. 5A shows a longitudinal section of a constricted portion, FIG. 5B shows a transverse section thereof, and shows an example using a plate-like electrode, and FIG. This shows an embodiment in which the plate-like electrodes are arranged in a fence shape.
【００２０】この実施例では、図５（ａ），（ｂ）に示
すように、カテーテルシャフト２ａに瓢箪型のバルーン
３ｃを配設し、その中央部のくびれ部の壁面に板状の高
周波通電用電極４ｃを埋設して狭窄部に板状電極４ｃが
位置するようにしてバルーン３ｃ内にカテーテルシャフ
ト２ａから造影剤を注入して膨張させる。In this embodiment, as shown in FIGS. 5 (a) and 5 (b), a gourd-shaped balloon 3c is disposed on the catheter shaft 2a, and a plate-like high-frequency current is applied to the wall surface of the constricted portion at the center. The contrast agent is injected from the catheter shaft 2a into the balloon 3c so that the plate-shaped electrode 4c is located at the stenosis portion, and is expanded.
【００２１】従来のバルーンカテーテルによりこの狭窄
部を治療する場合には、バルーンの拡張による機械的な
圧力のみによって弁を裂開するため、交連部以外の正常
な部分が裂けてしまい、弁の閉鎖不全を生じることがあ
った。しかし、本実施例のように、板状電極４ｃを瓢箪
型バルーン３ｃのくびれ部に弁狭窄部の交連部に整合す
るようにバルーン３ｃの壁内に埋設する。そして、バル
ーン３ｃの膨張と同時に板状電極４ｃに通電して高周波
加温すれば、交連部に対し癒着組織を融解させると同時
に機械的圧力を加え選択的に交連部を裂開することがで
きるようになる。これにより、より生理的な弁の形成が
可能となり、弁の閉鎖不全の合併を防ぐことができるよ
うになる。When a stenosis is treated with a conventional balloon catheter, the valve is opened only by mechanical pressure caused by the expansion of the balloon, so that a normal portion other than the commissure is torn and the valve is closed. Failure could occur. However, as in the present embodiment, the plate-shaped electrode 4c is embedded in the wall of the balloon 3c so as to match the constriction of the gourd-shaped balloon 3c with the commissure of the valve stenosis. If the plate-like electrode 4c is energized and heated at a high frequency simultaneously with the inflation of the balloon 3c, the cohesive tissue can be melted at the commissure and the commissure can be selectively dehisced by applying mechanical pressure. Become like This makes it possible to form a more physiological valve, and to prevent complication of valve insufficiency.
【００２２】また、図５（ｃ）に示すように、板状電極
４ｃをバルーン３ｃのくびれ部の全周にわたって柵状に
配設し、交連部に接触した電極のみに高周波を通電して
加温する。どの電極が交連部に接触しているかは低出力
で高周波通電しつつ心臓超音波断層装置を見ながら確認
する。 （実施例４）図６は本発明の実施例４であって動脈硬化
性血管狭窄病変の拡張用として適用された高周波通電焼
灼機能をもつバルーンカテーテルの実施例を示す。As shown in FIG. 5 (c), a plate-like electrode 4c is arranged in a fence shape over the entire circumference of the constricted portion of the balloon 3c. Warm up. Which electrode is in contact with the commissure part is confirmed by looking at the cardiac ultrasonic tomography apparatus while applying high-frequency current at a low output. (Embodiment 4) FIG. 6 shows an embodiment of a balloon catheter having a high-frequency electric ablation function applied to dilate arteriosclerotic stenotic lesions according to Embodiment 4 of the present invention.
【００２３】図６はこのバルーンカテーテルの縦断面
を、また図７はその横断面（図６のVII −VII 矢視断
面）を示す。この実施例ではカテーテルシャフト２の芯
部にガイドワイアー１３が貫通してその先端を越えて延
びるとともにカテーテルシャフト２の末端には紡垂状の
バルーン３が配置され、かつ、バルーン３の中央部円膜
面に膜状の高周波通電電極４が接着されている。FIG. 6 shows a longitudinal section of the balloon catheter, and FIG. 7 shows a transverse section thereof (a section taken along the line VII--VII in FIG. 6). In this embodiment, a guide wire 13 penetrates the core of the catheter shaft 2 and extends beyond the distal end thereof. A balloon 3 is disposed at the distal end of the catheter shaft 2 and a center circle of the balloon 3 is provided. A film-like high-frequency electrode 4 is adhered to the film surface.
【００２４】病変を局所的に拡張する際には図８に示す
ように、高周波通電電極４を接着したバルーン３の中央
部を血管狭窄部へガイドワイアー１３を用いて押入し、
バルーン３内へシリンジから造影剤を注入して膨張させ
ながら高周波通電を行う。すると、血管狭窄部のみが加
圧と同時に加熱されて、動脈硬化病変中の脂肪や結合組
織が軟化し、血管狭窄部が容易に拡張される。When the lesion is to be locally expanded, as shown in FIG. 8, the central portion of the balloon 3 to which the high-frequency current-carrying electrode 4 is adhered is pushed into the vascular stenosis using the guide wire 13,
A high-frequency current is supplied while a contrast agent is injected into the balloon 3 from a syringe and expanded. Then, only the vascular stenosis is heated at the same time as the pressurization, the fat and connective tissue in the atherosclerotic lesion are softened, and the vascular stenosis is easily expanded.
【００２５】[0025]
【発明の効果】以上のように本発明のバルーンカテーテ
ルによれば、膨張及び収縮自在な任意形状のバルーンの
壁内または内壁に任意形状の高周波通電電極と温度セン
サーが設置されているので、カテーテルを介する高周波
誘導型加熱により心臓血管内腔より病変部を選択的かつ
短時間に電極により適切な温度で焼灼して治療できる効
果を奏するようになる。また、高周波電通電極はレジン
でできた表面平滑なバルーン膜に覆われ組織や血液と直
接接触しないため高周波加熱に伴う副作用である血栓形
成を最小限にとどめることができる。As described above, according to the balloon catheter of the present invention, a radiofrequency current-carrying electrode of arbitrary shape and a temperature sensor are installed inside or on the inner wall of a balloon of arbitrary shape which can be expanded and contracted. The high-frequency induction heating through the electrode allows the affected part to be selectively and cauterized from the lumen of the cardiovascular vessel in a short time at an appropriate temperature by using the electrode, and has an effect of being treated. Further, since the high-frequency conducting electrode is covered with a balloon membrane made of resin and has a smooth surface and does not directly contact tissue or blood, thrombus formation, which is a side effect of high-frequency heating, can be minimized.
【図１】本発明のバルーンカテーテルの実施例１の概略
構成図である。FIG. 1 is a schematic configuration diagram of Embodiment 1 of a balloon catheter of the present invention.
【図２】図１に示したバルーンカテーテルのバルーン部
分の一部破断断面図である。FIG. 2 is a partially cutaway sectional view of a balloon portion of the balloon catheter shown in FIG.
【図３】図１に示したバルーンカテーテルの使用態様を
示し、図３（ａ）はバルーン挿入時を、また、図３
（ｂ）はバルーンを膨張させた状態を示す。3A and 3B show a usage mode of the balloon catheter shown in FIG. 1; FIG.
(B) shows a state where the balloon is inflated.
【図４】心房細動治療用のバルーンカテーテルの実施例
の該略図であって図４（ａ）は右房用バルーンを、ま
た、図４（ｂ）は左房用バルーンを示す。FIG. 4 is a schematic view of an embodiment of a balloon catheter for treating atrial fibrillation, wherein FIG. 4 (a) shows a right atrial balloon and FIG. 4 (b) shows a left atrial balloon.
【図５】心臓弁膜症の狭窄部治療用のバルーンカテーテ
ルの実施例の概略図であって、図５（ａ）は狭窄部の縦
断面を、図５（ｂ）はその横断面であって板状電極を用
いた実施例を、また、図５（ｃ）は同じくその横断面で
あって板状電極を狭窄部の全周に沿って柵状に配設した
実施例を示す。5 is a schematic view of an embodiment of a balloon catheter for treating a stenosis of valvular heart disease, FIG. 5 (a) is a longitudinal section of the stenosis, and FIG. 5 (b) is a cross section thereof. FIG. 5 (c) shows an embodiment using a plate-like electrode, and FIG. 5 (c) shows an embodiment in which the plate-like electrode is similarly arranged in a bar shape along the entire circumference of the stenosis.
【図６】動脈硬化性血管狭窄病変部の拡張用バルーンカ
テーテルの縦断面図である。FIG. 6 is a longitudinal sectional view of a dilatation balloon catheter for an atherosclerotic stenosis lesion.
【図７】図６に示したバルーンカテーテルのVII −VII
矢視部の横断面図である。FIG. 7 shows a balloon catheter VII-VII shown in FIG.
It is a cross section of an arrow view part.
【図８】図６に示したバルーンカテーテルを血管狭窄部
に挿入した状態と膨張させた状態を示す。8 shows a state where the balloon catheter shown in FIG. 6 is inserted into a vascular stenosis part and a state where the balloon catheter is inflated.
【図９】従来のバルーンの中心部に加温用電極を内設し
たバルーンカテーテルの縦断面を示す。FIG. 9 shows a longitudinal section of a balloon catheter in which a heating electrode is provided in the center of a conventional balloon.
１ バルーンカテーテル ２ カテーテルシャフト ３ バルーン ４ 高周波通電用電極 ５ 温度センサー ７ 対極板 ９ 高周波発生装置 １０ 温度モニター DESCRIPTION OF SYMBOLS 1 Balloon catheter 2 Catheter shaft 3 Balloon 4 Electrode for high frequency electricity 5 Temperature sensor 7 Counter electrode 9 High frequency generator 10 Temperature monitor
Claims (5)
フトの先端部にレジンでできた収縮及び膨張可能なバル
ーンを備えるとともに、該バルーンの壁内または内壁に
高周波加温用電極と温度センサーとを設置したバルーン
カテーテル。1. A catheter shaft capable of passing through a guide wire is provided with a balloon made of resin and capable of being contracted and inflated, and a high-frequency heating electrode and a temperature sensor are installed in or on the inner wall of the balloon. Balloon catheter.
電極であって上記バルーンの内壁全周または内壁に部分
的に設置されている請求項１記載のバルーンカテーテ
ル。2. The balloon catheter according to claim 1, wherein the high-frequency heating electrode is a mesh-like or membrane-like electrode, and is installed around the entire inner wall of the balloon or partially on the inner wall.
極であって洞結節、房室結節、肺静脈等を避けて上記バ
ルーンの内壁または壁内に設置されている請求項１記載
のバルーンカテーテル。3. The high-frequency heating electrode is a plurality of linear electrodes, and is disposed on the inner wall of the balloon or in the wall so as to avoid a sinus node, an atrioventricular node, a pulmonary vein and the like. A balloon catheter as described.
そのくびれ部に板状の電極が設置されている請求項１記
載のバルーンカテーテル。4. The balloon is a gourd-shaped balloon,
The balloon catheter according to claim 1, wherein a plate-like electrode is provided in the constricted portion.
周にわたって柵状に配置され交連部に接触する上記板状
電極のみに高周波通電がされる請求項４記載のバルーン
カテーテル。5. The balloon catheter according to claim 4, wherein said plate-shaped electrodes are arranged in a fence shape over the entire constricted portion of said balloon, and high-frequency current is applied only to said plate-shaped electrodes in contact with commissure portions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5249421A JP2574119B2 (en) | 1993-10-05 | 1993-10-05 | Balloon catheter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5249421A JP2574119B2 (en) | 1993-10-05 | 1993-10-05 | Balloon catheter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07100214A JPH07100214A (en) | 1995-04-18 |
| JP2574119B2 true JP2574119B2 (en) | 1997-01-22 |
Family
ID=17192731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5249421A Expired - Lifetime JP2574119B2 (en) | 1993-10-05 | 1993-10-05 | Balloon catheter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2574119B2 (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 (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5971983A (en) * | 1997-05-09 | 1999-10-26 | The Regents Of The University Of California | Tissue ablation device and method of use |
| WO2001000114A1 (en) * | 1999-06-25 | 2001-01-04 | Vahid Saadat | Apparatus and methods for treating tissue |
| JP3611799B2 (en) * | 2001-04-06 | 2005-01-19 | 有限会社日本エレクテル | Multipurpose ablation balloon catheter |
| US8579889B2 (en) * | 2008-01-11 | 2013-11-12 | Boston Scientific Scimed Inc. | Linear ablation devices and methods of use |
| US8945117B2 (en) | 2009-02-11 | 2015-02-03 | Boston Scientific Scimed, Inc. | Insulated ablation catheter devices and methods of use |
| US9056191B2 (en) | 2012-04-11 | 2015-06-16 | Covidien Lp | Apparatus and method for removing occlusive tissue |
| US10524684B2 (en) | 2014-10-13 | 2020-01-07 | Boston Scientific Scimed Inc | Tissue diagnosis and treatment using mini-electrodes |
| US10603105B2 (en) | 2014-10-24 | 2020-03-31 | Boston Scientific Scimed Inc | Medical devices with a flexible electrode assembly coupled to an ablation tip |
| US20200038672A1 (en) * | 2015-12-16 | 2020-02-06 | Japan Electel Inc. | Radiofrequency balloon catheter system |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0798048B2 (en) * | 1987-03-11 | 1995-10-25 | オリンパス光学工業株式会社 | Hyperthermia probe |
| JPH0798049B2 (en) * | 1987-03-19 | 1995-10-25 | オリンパス光学工業株式会社 | Intracorporeal hyperthermia treatment device |
| JPS6446056U (en) * | 1987-09-17 | 1989-03-22 | ||
| JPH02167163A (en) * | 1988-09-26 | 1990-06-27 | Olympus Optical Co Ltd | Hyperthermia device |
| JPH02271877A (en) * | 1989-04-13 | 1990-11-06 | Omron Corp | Electrode for high frequency thermal treatment |
| JPH05212118A (en) * | 1992-02-06 | 1993-08-24 | Inter Noba Kk | Hot balloon catheter and blood vessel exipansion method using the same |
-
1993
- 1993-10-05 JP JP5249421A patent/JP2574119B2/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 |
|---|---|
| JPH07100214A (en) | 1995-04-18 |
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