Ultrasonic ablation/dissolution transducer
First Claim
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1. Ultrasonic apparatus for clot dissolution comprising:
- radiator means for coupling ultrasonic waves into intravascular fluids including clots, said radiator means being sized for intravascular insertion;
means, connected with said radiator means, for the generation of ultrasonic waves; and
separate means for promoting cavitation of the intravascular fluid proximate the radiator means.
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Abstract
Ultrasonic apparatus for clot dissolution includes a radiator for coupling ultrasonic waves and a piezoelectric crystal, connected with said radiator, for the intravascular generation of ultrasonic waves; said ultrasonic waves being propagated along a longitudinal axis of said piezoelectric crystal. A seed liquid is introduced proximate the radiator for promoting cavitation of intravascular fluid. In addition, enhancement of clot dissolution by chemical agents is shown to be significantly increased when combined with ultrasonic energy.
388 Citations
22 Claims
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1. Ultrasonic apparatus for clot dissolution comprising:
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radiator means for coupling ultrasonic waves into intravascular fluids including clots, said radiator means being sized for intravascular insertion; means, connected with said radiator means, for the generation of ultrasonic waves; and separate means for promoting cavitation of the intravascular fluid proximate the radiator means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. Ultrasonic surgical apparatus for clot dissolution comprising:
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a catheter having at least one lumen therethrough and adapted for intravascular positioning; an ultrasonic transducer disposed in the catheter lumen at a distal end thereof, said ultrasonic transducer comprising; radiator means for coupling ultrasonic waves into clots; piezoelectric crystal means, connected with said radiator means, for generating ultrasonic waves; means for promoting cavitation of intravascular fluid proximate the radiator means; and power source means, disposed exterior to a proximate end of said catheter and electrically connected to said ultrasonic transducer through said catheter lumen, for causing said piezoelectric crystal to generate ultrasonic waves. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for dissolving intravascular clots, said method comprising the steps of:
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introducing ultrasonic waves proximate intravascular clots comprising inserting a catheter, having an ultrasonic transducer on one end thereof, into a vessel and positioning the ultrasonic transducer proximate the intravascular clot; and providing means for promoting cavitation of intravascular fluid proximate the intravascular clots. - View Dependent Claims (20, 21, 22)
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Specification