Title:
【発明の名称】低温カテーテル
Document Type and Number:
Japanese Patent JP3209276
Kind Code:
B2
Abstract:
The invention provides a catheter for ice mapping and ablation and a method of ablation using the catheter. The catheter includes at least two lumens for circulating a refrigerating fluid adjacent an ablation device located at the end of a catheter. The refrigerated ablation device is used to chill a localized region of myocardial tissue, thereby permitting the resulting change in electrical activity to be determined. In response to the test results, the ablation device may be used to make a lesion in the myocardial tissue to correct a cardiac arrhythmia. In one embodiment, the ablation device is an electrode which uses radio frequency energy to ablate the myocardial tissue. Alternatively, the ablation device is an electrode adapted for direct current ablation. In another embodiment, the electrode is replaced with an optical fiber in communication with a laser which uses the laser's light energy to ablate tissue. Yet another embodiment is a cryogenic catheter, useful for cooling tissue for other applications, for use as combined or separate mapping and ablation devices, or for use with the ice mapping and ablation means of the present invention. The embodiments may include provisions for steering the catheter and for stabilizing the ablation device at the proposed lesion site.
Inventors:
Milder, Frederick, Elle.
Hed, A., Jive
Hed, A., Jive
Application Number:
JP51863693A
Publication Date:
September 17, 2001
Filing Date:
April 16, 1993
Export Citation:
Assignee:
CryoCast Technologies, Inc.
International Classes:
A61B18/12; A61B18/02; A61B18/14; A61M25/01; A61B17/00; A61B18/00; A61B18/20; A61B18/24; A61B18/28; A61F7/00; (IPC1-7): A61B18/12; A61B18/02
Domestic Patent References:
| JP50150291A |
Other References:
【文献】米国特許3524446(US,A)
【文献】米国特許3272203(US,A)
【文献】米国特許3272203(US,A)
Attorney, Agent or Firm:
Teruo Akimoto