Title:
ULTRASONIC INSTRUMENT FOR SURGICAL OPERATIONS
Document Type and Number:
WIPO Patent Application WO/1987/001575
Kind Code:
A1
Abstract:
Instrument for use in various surgical operations, such as cutting of tissues, especially a bone, separation of a periosteum, and cutting and separation of deposit, such as calcium mass, by ultrasonic vibrations. An ultrasonic vibration transmitting tool (5) connected to an ultrasonic vibration generator (4) and adapted to transmit mechanical vibrations with an ultrasonic frequency comprises: at least one of cutting edge portion (25) extending at a predetermined angle to the direction of the mechanical vibrations with an ultrasonic frequency, and cutting edge portions (23, 24) extending substantially in parallel with the direction of the vibrations; a spoon-shaped operating portion (7) adapted to contact the tissue; and a fluid passage (21) extending through the interior of this ultrasonic vibration transmitting tool, said fluid passage having an outlet port (22) opened inside the spoon-shaped operating portion. Since the whole or an outer layer of the operating portion (7), which has the cutting edge portions adapted to contact a tissue, is formed of a ceramic material, this tool can prevent the abrasive deformation of the cutting edge portions, and a danger of applying an electric shock to the nervous tissue when a single electrical accident occurs.
Inventors:
IDEMOTO MORITO (JP)
NOGUCHI YASUO (JP)
NOGUCHI YASUO (JP)
Application Number:
PCT/JP1986/000361
Publication Date:
March 26, 1987
Filing Date:
July 15, 1986
Export Citation:
Assignee:
SUMITOMO BAKELITE CO (JP)
International Classes:
A61B17/32; A61B17/56; A61B18/00; A61M1/00; (IPC1-7): A61B17/32; A61B17/56
Foreign References:
| JPS50100891A | 1975-08-09 | |||
| JPS51136387A | 1976-11-25 |
Other References:
See also references of EP 0238667A4
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