JPH0376150B2 - - Google Patents
Info
- Publication number
- JPH0376150B2 JPH0376150B2 JP63221078A JP22107888A JPH0376150B2 JP H0376150 B2 JPH0376150 B2 JP H0376150B2 JP 63221078 A JP63221078 A JP 63221078A JP 22107888 A JP22107888 A JP 22107888A JP H0376150 B2 JPH0376150 B2 JP H0376150B2
- Authority
- JP
- Japan
- Prior art keywords
- balloon
- electrode
- catheter
- tip
- occlusion
- 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
- 238000010438 heat treatment Methods 0.000 claims description 9
- 239000007788 liquid Substances 0.000 description 10
- 210000004204 blood vessel Anatomy 0.000 description 7
- 206010003210 Arteriosclerosis Diseases 0.000 description 4
- 208000007536 Thrombosis Diseases 0.000 description 4
- 208000037260 Atherosclerotic Plaque Diseases 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 230000017531 blood circulation Effects 0.000 description 3
- 206010053648 Vascular occlusion Diseases 0.000 description 2
- 230000000916 dilatatory effect Effects 0.000 description 2
- 210000004177 elastic tissue Anatomy 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 208000021331 vascular occlusion disease Diseases 0.000 description 2
- 208000031481 Pathologic Constriction Diseases 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 208000011775 arteriosclerosis disease Diseases 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000002224 dissection Methods 0.000 description 1
- 230000002526 effect on cardiovascular system Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 208000018578 heart valve disease Diseases 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 208000037803 restenosis Diseases 0.000 description 1
- 208000037804 stenosis Diseases 0.000 description 1
- 230000036262 stenosis Effects 0.000 description 1
- 210000004231 tunica media Anatomy 0.000 description 1
- 230000002792 vascular Effects 0.000 description 1
Description
【発明の詳細な説明】
［産業上の利用分野］
この発明は心臓血管用カテーテルの中で動脈硬
化等による血管の閉塞を治療するための血管拡張
用のバルーンカテーテルに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a balloon catheter for dilating blood vessels to treat occlusion of blood vessels due to arteriosclerosis, etc., among cardiovascular catheters.
［従来の技術］
血管の閉塞をバルーンカテーテルを用いて治療
する方法として内腔閉塞の部分で常温状態下にて
バルーンを加圧膨張させて機械的に血栓やアテロ
ームを押し潰し、血管壁を伸展させて閉塞部を拡
張し、血流を改善させたり、カテーテルの先端部
を血栓よりも前方へ進入させたのち、バルーンを
膨張させて血栓を体外へ移動させて除去すること
により血流を確保することが行われている。[Prior art] A method of treating vascular occlusion using a balloon catheter involves inflating a balloon under pressure at room temperature in the area of lumen occlusion to mechanically crush thrombi and atheroma and stretch the vascular wall. The blood flow is secured by dilating the occluded area and improving blood flow, or by advancing the tip of the catheter ahead of the blood clot and then inflating the balloon to move the blood clot outside the body and remove it. things are being done.
［発明が解決しようとする課題］
上記従来技術においては、石灰化して硬化した
アテロームや血栓はしばしば除去不能であり、機
械的圧力でのみ血管壁を伸展させるため中膜の弾
性繊維を断裂させ血管の解離や穿孔を合併するこ
とがある。又一時的に拡張に成功しても、約30％
の症例で再狭窄をきたすことが報告されている。[Problems to be Solved by the Invention] In the above-mentioned conventional technology, calcified and hardened atheroma and thrombi are often impossible to remove, and in order to stretch the blood vessel wall only by mechanical pressure, the elastic fibers of the tunica media are torn and the blood vessel is stretched. It may be complicated by dissection or perforation. Even if temporary expansion is successful, approximately 30%
It has been reported that restenosis occurs in several cases.
そこで本発明は閉塞部を加温しながら加圧する
ことにより硬化したアテロームや血栓の除去で血
管壁の弾性繊維の伸展を良好に行えるようにした
バルーンカテーテルを提供することを目的とす
る。 SUMMARY OF THE INVENTION An object of the present invention is to provide a balloon catheter that can remove hardened atheroma or thrombus by applying pressure while heating the occluded area, thereby effectively stretching the elastic fibers of the blood vessel wall.
［課題を解決するための手段］
この発明は先端部の膨張および収縮が可能なバ
ルーンを設け、このバルーンの内部に高周波加温
用の電極を設けて構成される。[Means for Solving the Problems] The present invention includes a balloon whose tip portion can be expanded and deflated, and an electrode for high-frequency heating provided inside the balloon.
［作用］
上記構成によつて、血管閉塞部を高周波加温法
によつて加温させた状態でバルーンを膨張させる
ようにしたものである。[Function] With the above configuration, the balloon is inflated while the vascular occlusion is heated by high-frequency heating.
［実施例］
以下、この発明の実施例を添付図面を参照して
説明する。[Embodiments] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
第１図および第２図において、１は例えばＸ線
不透過テフロン製のカテーテルであり、このカテ
ーテル１の先端部には膨張および収縮が可能なバ
ルーン２が形成されている。３は前記バルーン２
の中心軸方向に設けられた高周波加温用の電極で
あり、この電極３は例えば外径2.0mm、内径1.6
mm、長さ20mmの円錐形状をなし、Ｘ線不透過マー
カとなる可撓性の金属材料から形成されている。
また、電極３の先端の先鋭部４はバルーン２より
も先端側に位置する取付部５に挿入され、電極３
の基端開口部６は前記カテーテル１の軸方向ほぼ
全長にわたつて形成された送液路７に連通されて
いる。また、電極３にはバルーン２の内部に連通
する位置で開口部８が形成されているとともに、
前記送液路７の基端には図示しない送液ポンプと
吸引ポンプとが選択的に連通可能に接続されてい
る。したがつて、送液ポンプを作動させてバルー
ン２へ送液すれば、これを膨張させることがで
き、吸引ポンプを作動させてバルーン２内の液体
を吸引すれば、これを収縮させることができるよ
うになつている。また、前記送液路７にはスタイ
レツト９が挿入され、スタイレツト９には電極３
が電気的に接続されている。第３図において、高
周波発生器１０は周波数13.56MHz、出力２〜8W
でその出力端子を銅線１１，１２を介し対極の電
極３，３Ａに接続されている。１３は電位コント
ロール装置、１４はモニター装置である。銅線１
１はスタイレツト９を介し径小な円錐形状の電極
３に接続され、銅線１２は生体の正面側または背
面側に装着された金属製円盤構造をなす電極３Ａ
に接続されている。したがつて、モニター装置１
４を観察して電位コントロール装置１３を調整し
ながら誘導電流を生体内に流して対極加温方式に
よる局部加温ができるようになつている。 In FIGS. 1 and 2, reference numeral 1 denotes a catheter made of, for example, X-ray opaque Teflon, and a balloon 2 that can be inflated and deflated is formed at the distal end of the catheter 1. As shown in FIG. 3 is the balloon 2
This is an electrode for high frequency heating provided in the central axis direction of the electrode 3, and this electrode 3 has an outer diameter of 2.0 mm and an inner diameter of 1.6
It has a conical shape with a length of 20 mm and is made of a flexible metal material that serves as an X-ray opaque marker.
Further, the sharp tip portion 4 at the tip of the electrode 3 is inserted into the attachment portion 5 located on the tip side of the balloon 2, and the electrode 3
The proximal opening 6 of the catheter 1 is in communication with a liquid feeding path 7 formed over almost the entire length of the catheter 1 in the axial direction. Further, an opening 8 is formed in the electrode 3 at a position communicating with the inside of the balloon 2, and
A liquid feeding pump and a suction pump (not shown) are selectively connected to the base end of the liquid feeding path 7 so as to be able to communicate with each other. Therefore, by operating the liquid pump to send liquid to the balloon 2, it can be expanded, and by operating the suction pump to suck the liquid in the balloon 2, it can be deflated. It's becoming like that. Further, a stylet 9 is inserted into the liquid feeding path 7, and an electrode 3 is inserted into the stylet 9.
are electrically connected. In Figure 3, the high frequency generator 10 has a frequency of 13.56 MHz and an output of 2 to 8 W.
The output terminals thereof are connected to counter electrodes 3 and 3A via copper wires 11 and 12. 13 is a potential control device, and 14 is a monitor device. copper wire 1
1 is connected to a small-diameter conical electrode 3 via a stylet 9, and a copper wire 12 is connected to an electrode 3A having a metal disc structure attached to the front or back side of the living body.
It is connected to the. Therefore, the monitor device 1
4 and while adjusting the potential control device 13, an induced current is passed through the living body to perform local heating using a counterelectrode heating method.
つぎに、上記バルーンカテーテルを用いて血栓
を除去する場合について説明する。 Next, a case will be described in which a blood clot is removed using the balloon catheter.
まず、第４図に示すようにバルーン２を収縮さ
せた状態でカテーテル１を経皮的に血管１５に挿
入する。そして、カテーテル１の先端部を閉塞部
１６の個所に位置させたならば高周波発生器１０
からの誘導電流を前記電極３，３Ａを介して生体
内に流して閉塞部１６部分を局所的に60℃前後に
加温させる。その後、バルーン２へ開口部６を通
して送液してこれを第５図に示すように膨張させ
る。すると、60℃前後に加温された閉塞部１６は
膨張したバルーン２によつて滑らかに押し拡げら
れ、良好に押し潰されて、血流を確保することが
できる。また、この状態でカテーテル１を前後動
あるいは回転させてもよい。そして、閉塞部１６
が石灰化して硬化している場合でも閉塞部１６を
加温させた状態でバルーン２を膨張させて押し当
てることにより閉塞部１６を良好に押し潰すこと
ができる。 First, as shown in FIG. 4, the catheter 1 is percutaneously inserted into the blood vessel 15 with the balloon 2 deflated. When the distal end of the catheter 1 is located at the occlusion part 16, the high frequency generator 10
An induced current is passed through the electrodes 3 and 3A into the living body to locally heat the occluded portion 16 to around 60°C. Thereafter, a liquid is sent to the balloon 2 through the opening 6 to inflate it as shown in FIG. Then, the closed part 16 heated to around 60° C. is smoothly expanded and crushed by the expanded balloon 2, and blood flow can be ensured. Further, the catheter 1 may be moved back and forth or rotated in this state. And the closing part 16
Even when the occlusion part 16 is calcified and hardened, the occlusion part 16 can be crushed well by inflating and pressing the balloon 2 while the occlusion part 16 is heated.
第６図はこの発明の他の実施例を示し、この実
施例はカテーテル１には送液路７の周囲に挿通路
１７が軸方向ほぼ全長にわたつて形成され、挿通
路１７にスタイレツト９が挿入されている。ま
た、送液路７の先端にはバルーン２内部の基端側
に位置して開口部６Ａが形成されているととも
に、バルーン２の中心軸方向に設けられた円錐形
状の電極３の基端が前記開口部６Ａより先端側に
形成された取付部５Ａに嵌合支持され、電極３の
先端が取付部５に挿入支持されている。このよう
な構造によれば電極３に開口部を形成する必要が
ない。 FIG. 6 shows another embodiment of the present invention. In this embodiment, an insertion passage 17 is formed in the catheter 1 around the liquid feeding passage 7 over almost the entire length in the axial direction, and a stylet 9 is provided in the insertion passage 17. It has been inserted. In addition, an opening 6A is formed at the tip of the liquid feeding path 7, located on the proximal side inside the balloon 2, and the proximal end of the conical electrode 3 provided in the direction of the central axis of the balloon 2 is formed. The electrode 3 is fitted and supported by a mounting portion 5A formed on the distal end side of the opening 6A, and the tip of the electrode 3 is inserted and supported by the mounting portion 5. According to such a structure, there is no need to form an opening in the electrode 3.
なお、この発明は上記実施例に限定されるもの
ではなくこの発明の要旨の範囲内において種々の
変形実施が可能であり、例えばこの発明のバルー
ンカテーテルは心臓弁膜症による弁狭窄部に対す
る拡張用としても適用できる。 Note that the present invention is not limited to the above embodiments, and can be modified in various ways within the scope of the gist of the invention. For example, the balloon catheter of the present invention can be used to dilate a valvular stenosis caused by heart valve disease. can also be applied.
［発明の効果］
この発明は先端部に膨張および収縮が可能なバ
ルーンを備えているとともに、このバルーンの内
部に高周波加温用の電極が設けられており、血管
内腔より閉塞部を加温しながら加圧することによ
り閉塞部の拡張を良好に行えるようにしたバルー
ンカテーテルを提供できる。[Effects of the Invention] This invention is equipped with a balloon that can be inflated and deflated at its tip, and an electrode for high-frequency heating is provided inside the balloon, which heats the occluded area from the lumen of the blood vessel. It is possible to provide a balloon catheter in which the occluded portion can be expanded well by pressurizing the occlusion area.
第１図はこの発明の実施例を示すバルーンカテ
ーテルの先端部の断面図、第２図は電極およびス
タイレツトを示す斜視図、第３図は治療状態を示
す概略説明図、第４図および第５図は閉塞部を拡
張する順序を示す説明図、第６図はこの発明の他
の実施例を示す断面図である。
１…カテーテル、２…バルーン、３…高周波加
温用の電極。
FIG. 1 is a sectional view of the distal end of a balloon catheter showing an embodiment of the present invention, FIG. 2 is a perspective view showing an electrode and a stylet, FIG. 3 is a schematic explanatory view showing a treatment state, and FIGS. The figure is an explanatory view showing the order of expanding the occluded portion, and FIG. 6 is a sectional view showing another embodiment of the present invention. 1...catheter, 2...balloon, 3...electrode for high frequency heating.
Claims (1)
備えているとともに、このバルーンの内部に高周
波加温用の電極が設けられてなることを特徴とす
るバルーンカテーテル。1. A balloon catheter comprising a balloon capable of inflating and deflating at its distal end, and an electrode for high-frequency heating provided inside the balloon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63221078A JPH0268073A (en) | 1988-09-02 | 1988-09-02 | Balloon catheter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63221078A JPH0268073A (en) | 1988-09-02 | 1988-09-02 | Balloon catheter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0268073A JPH0268073A (en) | 1990-03-07 |
| JPH0376150B2 true JPH0376150B2 (en) | 1991-12-04 |
Family
ID=16761142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63221078A Granted JPH0268073A (en) | 1988-09-02 | 1988-09-02 | Balloon catheter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0268073A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2538375B2 (en) * | 1990-03-01 | 1996-09-25 | 修太郎 佐竹 | Balloon catheter |
| JP2890386B2 (en) * | 1992-04-22 | 1999-05-10 | インター・ノバ株式会社 | Balloon catheter |
| US5566221A (en) * | 1994-07-12 | 1996-10-15 | Photoelectron Corporation | Apparatus for applying a predetermined x-radiation flux to an interior surface of a body cavity |
-
1988
- 1988-09-02 JP JP63221078A patent/JPH0268073A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0268073A (en) | 1990-03-07 |
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