Handpiece for surgical operation
US5346469A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 25, 1993 |
| Grant date | Sep 13, 1994 |
| Priority date | — |
| Expiry date | Jun 25, 2013 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2218/008
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A handpiece for preventing the visual field of an endoscope from being disturbed by irrigation liquid, and which performs safely and reliably selective separation of biological tissue such as a blood vessel or the like by ultrasonic vibration, in operation under a visual field of an endoscope which is restricted in operation has a tip section of 5/4 or 7/4 times wavelength, a forward end curved in an arcuate form, and a tip cover provided with a detachable tip top cover at a forward end, which is semi-transparent or transparent, and which has an inclined surface, to prevent irrigation liquid from scattering. The tip cover of an ultrasonic surgical knife is provided with an auxiliary cavity for a laser probe, and a spatula-like projection at the forward end of the cover. The main cavity and the auxiliary cavity for the tip are closed by an O-ring gas-tight packing or a gas-tight closure to prevent pneumoperitoneum gas within an abdomen cavity from leaking.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.