Surgical instrument
US4832683A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 15, 1987 |
| Grant date | May 23, 1989 |
| Priority date | — |
| Expiry date | May 15, 2007 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M1/772
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A surgical instrument for cutting and separating biological tissue by employing ultrasonic vibration, particularly for cutting bones, separating the periosteum, and cutting and separating a coherent mass such as a calcium mass. An ultrasonic vibration-transmitting tool (5) which is connected to an ultrasonic vibration source (4) and performs mechanical vibration at the frequency of the ultrasonic waves has a spoon-shaped working portion (7) which is provided with at least one of a blade-shaped portion (25) forming a predetermined angle with respect to the direction of the mechanical vibration at the frequency of the ultrasonic waves and a blade-shaped portion (23, 24) substantially parallel with the direction of the vibration, the spoon-shaped working portion being adapted to be brought into contact with the biological tissue, and a liquid passage (21) passing through the interior of the ultrasonic vibration-transmitting tool, the liquid passage having an opening (22) which opens into the working portion. Further, by making of ceramic the whole part or the surface portion of the working portion (7) which is provided with the blade-shaped portion to be brought into contact with the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.