Shielded trocar and trocar shield
US5797943A · kind A · utility
57Cited by
3References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 3, 1997 |
| Grant date | Aug 25, 1998 |
| Priority date | — |
| Expiry date | Mar 3, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2017/349
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A trocar is formed from a cannula and an interfitting obturator for penetrating body cavity walls in laparoscopic and endoscopic surgery. The obturator is provided with an improved piercing tip having a pointed blade and an improved double locking blunt nosed shield design. Hydrophilic coatings or components are also employed on the shield and cannula to facilitate quicker shield action covering the pointed blade and ease of entry of the cannula tube through the body cavity wall. The improved shielded trocar is provided with an improved shield having a dolphin-nose shape at its distal end.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.