US 5,346,469 AGranted

Handpiece for surgical operation

AssigneeSumitomo Bakelite Co., Ltd.

InventorsTadaaki Ikeda, Morito Idemoto

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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.

Claims13

Dependent claims

A handpiece for surgical operation, for crushing, or cutting, separating and removing foreign bodies within biological histology or a body cavity by ultrasonic vibration, comprising:

a source of ultrasonic vibration;
a vibrator having a joint section and a tip section reduced in diameter, connected to the source of ultrasonic vibration for transmitting and enlarging mechanical vibration of ultrasonic frequency, and
a cover made of heat-resistant resin for receiving and covering said source of ultrasonic vibration and said vibrator,
wherein the source of ultrasonic vibration and the vibrator communicate with each other and are connected to each other by a suction passage extending therethrough in a lengthwise direction, wherein said cover has, in combination, a body cover for receiving therein said source of ultrasonic vibration and the joint section of said vibrator and a tip cover for covering said tip section, and wherein said tip section of said vibrator has a forward end thereof which is curved in arcuate configuration;
wherein a curvature point of the forward end of the tip section of the vibrator is located within 30 mm and at least 3/100 wavelength from the forward end of the tip section, and wherein a curvature angle is equal to or less than 35 degrees;
wherein said tip cover is so formed as to be rotatable about a longitudinal axis of the vibrator and to be capable of being fixed in a selected position of rotation;
and
wherein said tip cover has a forward end surface thereof which has an angle with respect to an axis of the vibrator in the lengthwise direction.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 08/085,771Filed 25 Jun 1993
Priority: JP 4-2688597 Oct 1992
Granted: 13 Sep 1994
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

A61B 17/320068
Surgical cutting instruments: using mechanical vibrations, e.g. ultrasonic
A61B 2017/32007
Using mechanical vibrations, e.g. ultrasonic: with suction or vacuum means
A61B 2017/320078
Working tips with special features, e.g. extending parts: tissue manipulating surface
A61B 2017/320084
Using mechanical vibrations, e.g. ultrasonic: irrigation sleeves

Family

No related US applications are recorded in the indexed filing history.

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