Trocar
US5423848A · kind A · utility
206Cited by
13References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 6, 1994 |
| Grant date | Jun 13, 1995 |
| Priority date | — |
| Expiry date | Jun 6, 2014 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2018/00827
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A trocar comprises an obturator having a piercing tip, and a cannula for forming a passage in tissue that is punched by the piercing tip. The cannula is formed from a flexible tube or a coil tube and transforms and libitum in accordance with the shape of the surgical tool that is to be inserted into the body cavity through the cannula. Therefore, the trocar of the invention allows insertion of a surgical tool curved in a circular arc into the body cavity without requiring no enlargement of the inside diameter of the cannula.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.