Cannula for a vein distention system
US4323072A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 8, 1980 |
| Grant date | Apr 6, 1982 |
| Priority date | — |
| Expiry date | May 8, 2000 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2090/032
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A cannula used in the distention and irrigation of a saphenous vein which is being tested prior to use as a coronary or peripheral bypass graft includes a tapered and beveled tip which allows easy insertion into the vein, and a sloping shoulder just proximal to the tip which provides a convenient site for firmly securing the vein to the cannula with a ligature. The cannula can be utilized in a distention and irrigation apparatus which includes a pressure limiting device having a resilient membrane reservoir which limits static pressure delivered to the vein to a predetermined level. The device is connected between the cannula of the present invention and a syringe filled with irrigation fluid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.