Catheter for ice mapping and ablation
Patent 5281213 Issued on January 25, 1994. Estimated Expiration Date: 
April 16, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
April 16, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3393679 3425419 3512531 3548829 3664344 3823718 3859986 3910277 Cryogenic surgical instrument Cryosurgical probe tip InventorsAssigneeApplicationNo. 870495 filed on 04/16/1992US Classes:606/15, With optical fiber606/20, Cyrogenic application606/33, Electromagnetic wave irradiation607/89, Laser application607/105, Internally applied607/122, Catheter or endocardial (inside heart) type607/154High frequency radiation typeExaminersPrimary: Achenbrenner, Peter A.Attorney, Agent or FirmForeign Patent References
International ClassA61B 017/36AbstractThe 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. | |
