Dilating trocar shield with blade tip
US6063099A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 12, 1998 |
| Grant date | May 16, 2000 |
| Priority date | — |
| Expiry date | Aug 12, 2018 |
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 sharpened portion of the blade is substantially narrower than the inner diameter of the cannula tube and can be completely covered by the shield. The improved shielded trocar is provided with an improved shield design having a dolphin-nose shape at its distal end.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.