Surgical instrument
AssigneeSumitomo Bakelite Co., Ltd.
InventorsMorito Idemoto, Naohiko Inoue, Yasuo Noguchi
Life of this patent
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Abstract
A surgical instrument comprises an ultrasonic source (7) and an ultrasonic vibration transmitter (8) connected to the source (7), which generates ultrasonic mechanical vibration. The ultrasonic vibration transducer includes a plurality of ring-shaped cutting blade portions (14) provided on an outer periphery of an operational part (9) which contacts organic tissue, and a liquid passage (11) through the transducer. The liquid passage opens at a front end (12) of the operational part and at recesses (13) between the blade portions. The surgical instrument cuts or incises organic tissue by ultrasonic vibration.
Claims4
A surgical instrument for scraping or carving organic tissue by ultrasonic vibration, comprising an ultrasonic transmitter adapted to be connected to an ultrasonic source to generate ultrasonic mechanical vibration, a plurality of ring-shaped cutting blade portions provided at an interval of 1 to 3 mm on and surrounding a periphery of an operational part which contacts organic tissue, said operational part having a round cross section, each of said blade portions extending in a plane traversing a longitudinal axis of said operational part, and a liquid passage extending through said transmitter for supplying a liquid such as physiological salt water and opening at a front end of said operational part and at recesses each having a depth of 0.1 to 1 mm between said blade portions.
Dependencies are inferred from the claim text.