04832683 is referenced by 296 patents and cites 18 patents.

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 biological tissue, it is possible to prevent wear deformation of the blade-shaped portion, and also to prevent transmission of electrical shocks to the nervous tissue in the event of a simple electrical fault state.

Title
Surgical instrument
Application Number
7/60394
Publication Number
4832683
Application Date
May 15, 1987
Publication Date
May 23, 1989
Inventor
Yasuo Noguchi
Yokohama
JP
Morito Idemoto
Yokohama
JP
Agent
Browdy and Neimark
Assignee
Sumitomo Bakellite Company
JP
IPC
A61B 17/20
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