Trocar having an improved tip configuration
US5776112A · kind A · utility
81Cited by
5References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 8, 1997 |
| Grant date | Jul 7, 1998 |
| Priority date | — |
| Expiry date | Apr 8, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B17/3417
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A safety-shielded trocar having an obturator with a linear cutting edge surface defining a base width substantially less than the diameter of the safety shield is disclosed. When the trocar is inserted through tissue, the tissue dilates from the width of the linear incision to accommodate the size of the safety shield of the trocar, thus making it possible to provide an access opening greater than the incisional width made by the linear cutting edge surface of the obturator. In a preferred embodiment, the safety shield has a shield tip region which is asymmetric to facilitate the dilation of the tissue as the trocar is inserted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.