Ultrasonic aspirator
First Claim
1. Apparatus for surgically removing tissue comprising in combinationa 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, andcontrol 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.
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Accused Products
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.
155 Citations
12 Claims
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1. 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.
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3. 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.
Specification