Combination introducer cannula and reducer for use therein
US5439455A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 11, 1994 |
| Grant date | Aug 8, 1995 |
| Priority date | — |
| Expiry date | Aug 11, 2014 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B17/3462
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A combination of an introducer cannula and a removable reducer for use therewith. The introducer cannula comprises an elongate tubular member having proximal and distal extremities and having a flow passage extending therethrough. A housing is mounted on the distal extremity and has a chamber in communication with the flow passage in the tubular member. Proximal and distal spaced apart seals are disposed in the chamber and are carried by the housing. The reducer comprises a body having proximal and distal extremities. The body has a cylindrical extension and the cylindrical extension has at least two elongate slots formed therein which extend through the cylindrical extension from the proximal extremity to the distal extremity of the body. The elongate slots extend diametrically of the cylindrical extension and adjoin each other to provide a central opening. A membrane seal is carried by the body and overlies the central opening. The membrane seal has a hole therein in alignment with the central opening. The hole in the membrane has a diameter of less than the diameter of the central opening. The reducer is secured to the introducer cannula so that the cylindrical extension of the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.