Mechanically extended spiral cryotip for a cryoablation catheter
US6905493B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 1, 2003 |
| Grant date | Jun 14, 2005 |
| Priority date | — |
| Expiry date | Jun 14, 2023 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2018/0262
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A system and method for cryoablating tissue at a target site in a patient includes a cryotip attached to the distal end of a catheter tube. The cryotip is made of a conductive polymer material that is heat set into a spiral configuration. Inside the cryotip is a configuration lumen. The cryotip assumes a straight configuration when a straightening member is positioned in the configuration lumen, and it assumes the spiral configuration when the straightening member is absent from the configuration lumen. The cryotip in the straight configuration is guided through the vasculature of a patient to the target site. At the target site, the straightening member is removed to configure the cryotip into the spiral configuration to contact the cryotip with circumferential tissue around the target site. A refrigerant fluid is then introduced into the expansion chamber of the cryotip to cool the tip to cryoablate the circumferential tissue.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.