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| 국가/구분 | United States(US) Patent 등록 |
|---|---|
| 국제특허분류(IPC7판) |
|
| 출원번호 | US-0073639 (1993-06-07) |
| 발명자 / 주소 |
|
| 출원인 / 주소 |
|
| 인용정보 | 피인용 횟수 : 444 인용 특허 : 0 |
A thermal ablation catheter includes an elongate body member having a heating element disposed over a predetermined length of its distal end. The heating element is suspended away from an exterior surface of the elongate member to form a circulation region thereunder. Thermally conductive fluid can
A thermal ablation catheter includes an elongate body member having a heating element disposed over a predetermined length of its distal end. The heating element is suspended away from an exterior surface of the elongate member to form a circulation region thereunder. Thermally conductive fluid can be introduced through a lumen in the elongate member and distributed within the circulation region to improve heat transfer. The catheter is used to introduce the thermally conductive medium to a hollow body organ where the heating element raises the temperature of the medium sufficiently to induce injury to the lining of the organ. Optionally, an introducer sheath having an expandable cage at its distal end may be used in combination with a thermal ablation catheter. The expandable cage helps center the heating element on the catheter within the body organ and prevents direct contact between the heating element and the wall of the organ. Heat transfer and temperature uniformity can be enhanced by inducing an oscillatory flow of the heat transfer medium through the catheter while heat is being applied.
A thermal ablation catheter comprising: an elongate member adapted for insertion into a hollow body cavity; said elongate member having a proximal end, a distal end, and a lumen extending between said proximal and distal ends; a convective heating element disposed over a predetermined length of the
A thermal ablation catheter comprising: an elongate member adapted for insertion into a hollow body cavity; said elongate member having a proximal end, a distal end, and a lumen extending between said proximal and distal ends; a convective heating element disposed over a predetermined length of the distal end of the elongate member and exposed to an environment external to said catheter; means for suspending the heating element away from an exterior surface of the elongate member to form a circulation region between the surface and the heating element; and means for distributing a heat transfer fluid from the lumen to the circulation region between the member surface and the heating element, wherein the heating element is capable of heating said heat transfer fluid to a temperature above 45°C.
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