Flapper valve for an insufflation cannula assembly
US5127909A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 5, 1990 |
| Grant date | Jul 7, 1992 |
| Priority date | — |
| Expiry date | Apr 5, 2010 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M13/003
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A cannula assembly for use in conjunction with insufflatory surgical techniques includes a cannula, a housing mounted on one end of the cannula, and a flapper valve mounted in the housing. The flapper valve includes a valve seat which is situated at an opening formed in the housing, a valve plug which is adapted to engage the valve seat to form a substantially gas tight seal with the valve seat, and a support plate on which the valve plug is mounted and which is biased to pivot the plug into and out of engagement with the valve seat. The valve plug is movable on the support plate so as to be self-aligning with the valve seat when the plug and valve are in engagement. The valve plug is uniquely configured to include a recessed reservoir at the proximal side and surrounded by a circular ridge. The reservoir collects blood or other body fluids while the ridge is engageable by an instrument such as an endoscope which is inserted into the cannula, thus preventing the blood from covering the face of the endoscope lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.