Endoscopic cannula with tricuspid leaf valve
US5273545A · kind A · utility
194Cited by
19References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 15, 1991 |
| Grant date | Dec 28, 1993 |
| Priority date | — |
| Expiry date | Oct 15, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7885
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A laparoscopic cannula having at its proximal end a resilient end seal carrying a resilient tri-cuspid valve. The valve is passive, yet allows sealing of a body cavity in surgical procedures to prevent fluid flow between the atmosphere and the body cavity, both when an instrument is carried within the cannula and when the cannula is not being used for passage of an instrument to the body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.