Trocar
US5984941A · kind A · utility
78Cited by
8References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 13, 1998 |
| Grant date | Nov 16, 1999 |
| Priority date | — |
| Expiry date | Feb 13, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B17/3417
- 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 with an improved sheath mounting and 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 sheath and obturator handle and housing assembly may be fabricated as a single plastic piece.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.