Methods of making and using ultrasonic handpiece

Details Methods of making and using ultrasonic handpiece Methods of making and using ultrasonic handpiece

1994-03-17

1996-01-16

Zele, Krista M.

Surgery

Means for introducing or removing material from body for...

With means for cutting, scarifying, or vibrating tissue

601 2, 604902, 433119, A61B 1732

Patent

active

054843987

ABSTRACT:
An ultrasonic surgical handpiece for surgery on a patient has a handpiece with distal and proximal ends on a housing thereof for manipulation by a surgeon. A vibrator is carried within a hollow inside of the housing. A tool extends from the vibrator at the distal end to a distal tip and is tubular with a bore along its axis so axial vibrations at high frequency are transmitted to the distal tip. Fluid flows from the distal tip to the vibrator, cools the vibrator and connects to a source of suction at the proximal end. A flue carried cantilever on the distal end extends about the tool so a space is between the tool and the flue for guiding fluid from the distal end to the distal tip. A port located through the tool connects between the space and the bore and is axially positioned near the distal end to collect fluid. An inlet on the flue is near the distal end for fluid provided by a supply. The inlet is axial distal of the port and/or may meter fluid to a preset range. The port may be at, near or toward a low stress region of the tool. The vibrator is piezo. The port can be diametrically opposed to the inlet. Holes may be located through the tool near the distal tip to prevent misting, clogging or dripping of fluid. A method of cooling the ultrasonic surgical handpiece has steps that circulate fluid from the inlet to the space and port and pass cooling fluid about the vibrator and to the source of suction. A method of making the ultrasonic tool may include having one or more ports through the tool to the bore wherein the ports are at, near or toward low stress regions and allow fluid flow from the space to the bore.

REFERENCES:
patent: 4493694 (1985-01-01), Wuchinich
patent: 4516398 (1985-05-01), Wuchinich
patent: 4921476 (1990-05-01), Wuchinich
patent: 5076276 (1991-12-01), Sakurai et al.
patent: 5151083 (1992-09-01), Pichler
patent: 5248297 (1993-09-01), Takase
patent: 5312329 (1994-05-01), Beaty et al.

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