Coaxial catheter system for performing a single step cryoablation
US6796979B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 11, 2002 |
| Grant date | Sep 28, 2004 |
| Priority date | — |
| Expiry date | Mar 17, 2023 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2018/0262
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A system for cryoablating target tissue at a treatment site includes an annular shaped balloon attached to the distal end of a first catheter. A cryo-element is attached to the distal end of a second catheter and the second catheter is disposed in the lumen of the first catheter. The cryo-element is positioned at the treatment site using the second catheter. Next, the first catheter is used to advance the balloon over the second catheter to the treatment site where the annular shaped balloon is Interposed between the cryo-element and the target tissue. Saline solution is pumped into the balloon to expand the balloon into contact with the cryo-element and the surrounding target tissue. Next, a refrigerant is expanded to cool the cryo-element, which in turn, freezes the saline solution. The resulting “ice ball” extracts heat from surrounding tissue resulting in the cryoablation of a substantially circumferential portion of tissue.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.