Variable interior dimension cannula assembly
US5334164A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 3, 1992 |
| Grant date | Aug 2, 1994 |
| Priority date | — |
| Expiry date | Jan 3, 2012 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2039/0666
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A cannula assembly for use in conjunction with endoscopic surgical techniques includes a cannula, a housing mounted on one end of the cannula, and a variable interior dimension cannula valve assembly in the housing. The variable interior dimension cannula valve assembly includes a flexible tubular member having a distal portion affixed to the housing, an intermediate portion capable of changing interior dimension and a proximate portion including a rigid rotating means and a locking means. The interior dimension of the cannula valve assembly may be set to a desired size to fit a surgical instrument inserted into the cannula passage while maintaining a substantially air-tight seal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.