Cannulae
US4747823A · kind A · utility
Inventor
Key dates
| Filing date | Jun 18, 1986 |
| Grant date | May 31, 1988 |
| Priority date | — |
| Expiry date | Jun 18, 2006 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M5/007
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A cholangiogram cannula of flexible plastics has an enlarged olive close to its patient end. A transparent sleeve of polyethylene is a close sliding fit along the cannula between the olive and a connector at the machine end of the cannula. The cannula is graduated along its length, the graduations being visible through the sleeve. In use, the sleeve is slid forwards against the olive to provide a reinforced gripping site by which the cannula can be gripped between finger and thumb or by forceps. The patient end of the cannula is manipulated into an incision made in the cystic duct and the sleeve is then slid rearwardly and the cystic duct sealed about the cannula to the rear of the olive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.