Endovascular cryotreatment catheter
US8298217B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 25, 2009 |
| Grant date | Oct 30, 2012 |
| Priority date | — |
| Expiry date | Jul 11, 2031 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2018/0268
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An elongated catheter device with a distal balloon assembly is adapted for endovascular insertion. Coolant injected through the device may, in different embodiments, directly cool tissue contacting the balloon, or may cool a separate internal chamber. Plural balloons may be provided, wherein a secondary outer balloon surrounds a primary inner balloon, the primary balloon being filled with coolant and acting as the cooling chamber, the secondary balloon being coupled to a vacuum return lumen to serve as a robust leak containment device and thermal insulator around the cooling chamber. One or more sensors may be disposed between the balloons or the vacuum return lumen, to detect leaks and control the flow of fluid through the device. Examples of sensors include pressure and temperature sensors, optical sensors, magnetic flow switches and flow meters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.