Trocar for penetration and skin incision
US5904699A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 19, 1997 |
| Grant date | May 18, 1999 |
| Priority date | — |
| Expiry date | Sep 19, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2017/346
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A trocar which has an obturator assembly for establishment of a surgical port for endoscopic or arthroscopic surgery is disclosed. The obturator includes a flat cutting blade, a shield that moves proximally and distally, a precock lever to move the shield proximally to expose the flat cutting blade, and a shield retaining assembly to constrain the shield in the proximal position. "Precocking" the trocar moves the shield from the distal position wherein the flat blade is covered, to a proximal position wherein the flat blade is exposed, and the shield is constrained by the shield retaining assembly. The exposed flat cutting blade of the precocked trocar can be used to incise or pierce tissue, thus avoiding the need to use a separate surgical sharp.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.