Safety trocar
US5690663A · kind A · utility
73Cited by
5References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 4, 1996 |
| Grant date | Nov 25, 1997 |
| Priority date | — |
| Expiry date | Jun 4, 2016 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B17/3496
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A safety trocar is provided which includes a spring-loaded shield that shields the cutting tip of the obturator after the obturator penetrates tissue. The distal end of the shield is conical in profile and contains a slot which conforms to the geometry of the cutting tip. The obturator tip contains a knife edge blade which extends the length of the cannula inner diameter. Ideally, the knife is made of an amorphous metal, and may be serrated at its edge. In one embodiment, the knife edge is contacted directly to a portion of the safety shield.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.