Catheter for ice mapping and ablation
US5281213A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 16, 1992 |
| Grant date | Jan 25, 1994 |
| Priority date | — |
| Expiry date | Apr 16, 2012 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2007/0056
- WIPO fieldMedical technology
- WIPO sectorInstruments
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. The embodiments may include provisions for steering the catheter and for stabilizing the ablation device at the proposed lesion site.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.