Safety trocar
US5318585A · kind A · utility
73Cited by
58References
34Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 7, 1993 |
| Grant date | Jun 7, 1994 |
| Priority date | — |
| Expiry date | Jun 7, 2013 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2090/08021
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A safety trocar is provided in which the cutting tip is withdrawn into the cannula in response to counterforce being removed from the cutting tip, e.g., by the tip entering a body cavity. The cutting tip is maintained in the exposed positioned by a mechanism associated with the obturator shaft, and is automatically withdrawn into the cannula under the force of a spring when the first mechanism is released by a second mechanism associated with the obturator. Penetration force is maintained at a minimum and safe and efficacious trocar entry is facilitated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.