Ultrasonic aspirator
AssigneeCavitron Corporation
InventorsDavid G. Wuchinich, Alan Broadwin, Robert P. Andersen
Life of this patent
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Abstract
Apparatus for the surgical removal of tissue is disclosed comprising a handpiece having a resonant vibrator with a magnetostrictive stack and connecting body encompassing a hollow elongated tool which is ultrasonically vibrated at its tip longitudinally to a peak to peak stroke of at least 0.005 inches at about 25,000 cps (25 KHz). A generator powers the vibrator and is automatically controlled at the frequency to maintain the resonant vibration. Aspiration is provided by suction through the hollow tool at its tip, and a manifold enclosing the tool end of the handpiece provides irrigation.
Claims12
Apparatus for surgically removing tissue comprising in combination
- a handpiece,
- a resonant vibrator mounted in said handpiece, said vibrator comprising a transducer for converting electrical excitation to mechanical vibrations, a connecting means fixedly attached to the anterior end of said transducer for transmitting and modifying the vibrations, and a tool at the other end of said connecting means,
- electrical excitation means mounted in said handpiece adjacent said transducer for inducing ultrasonic vibrations in said transducer,
- generator means for powering said electrical excitation means, and
- control means responsive to said transducer means output for adjusting and controlling the output of said generator means by varying the frequency of said ultrasonic vibrations.
A device for surgically disintegrating and aspirating tissue comprising
- a handpiece,
- a resonant vibrator mounted in said handpiece, and having a hollow elongated tool extending out from said handpiece, a connecting member at the other end of said tool, and a transducer connected to the posterior end of said connecting member,
- electrical excitation means mounted in said handpiece adjacent said transducer for exciting said transducer to vibrate in the ultrasonic frequency range, with a longitudinal stroke of at least 0.005 inch peak to peak, and
- aspiration means for applying suction through said hollow elongated tool communicatingly connected to the posterior end of said hollow tool, and
- automatic control means responsive to the level of said resonant vibrator for adjusting and controlling the output of said electrical excitation means in reference to a predetermined stroke level setting by varying the frequency of said resonant vibrator.
Dependencies are inferred from the claim text.