Endoscopic cryospray device
US5846235A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Apr 14, 1997 |
| Grant date | Dec 8, 1998 |
| Priority date | — |
| Expiry date | Apr 14, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2018/0212
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A cryoprobe instrument for endoscopic use has been provided that permits the delivery of liquid or gaseous cryogens in the form of a spray. In an embodiment, the cryoprobe instrument includes an elongated, flexible tube having a fluid passage defined therethrough; a proximal connector portion provided at the proximal end of the tube for coupling the tube to a pressurized source of cryogenic refrigerant; and a nozzle tip mounted to the distal end of the tube. The nozzle tip has an outlet orifice constructed and arranged such that through the Joule-Thompson effect, cryogenic refrigerant exiting through the outlet orifice rapidly and substantially expands and cools.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.