Cannula assembly having closed, pressure-removable piercing tip
US4589879A · kind A · utility
114Cited by
18References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 4, 1983 |
| Grant date | May 20, 1986 |
| Priority date | — |
| Expiry date | Nov 4, 2003 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61J2200/10
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A cannula assembly especially for medical use is disclosed which virtually eliminates coring during the piercing of a barrier. The cannula assembly includes a hollow cylindrical shank and a piercing tip removably mounted in and closing one end of the shank. Pressurized introduction of fluid through the shank forces the piercing tip out of engagement with the shank, placing opposite sides of the barrier in fluid communication.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.