Self-sealing cannula
US4177814A · kind A · utility
453Cited by
7References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 18, 1978 |
| Grant date | Dec 11, 1979 |
| Priority date | — |
| Expiry date | Jan 18, 1998 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2017/3437
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Self sealing cannula automatically maintains insufflation pressure in a body cavity. A slotted elastomeric valve is positioned in the valve seat with the slot disposed over the passage. The elastomeric valve is compressed to seal the slot, thus sealing the cannula passage. A surgical instrument such as a trocar or laparoscope may be slid through the cannula passage, which remains sealed regardless of the presence or absence of the surgical instrument within the passage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.