Miniature ultrasonic transducer for plaque ablation

Details Miniature ultrasonic transducer for plaque ablation Miniature ultrasonic transducer for plaque ablation

1990-12-10

1993-12-14

Smith, Ruth S.

Surgery

Truss

Perineal

A61B 1700

Patent

active

052692914

ABSTRACT:
Ultrasonic apparatus for clot dissolution and plaque ablation includes a radiator for coupling ultrasonic waves into plaque 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 and having an inertial node position within said piezoelectric crystal. The piezoelectric crystal is constructed in order to prevent significant power loss caused by a shifting of the inertial node of the generated ultrasonic waves to a position exterior to said piezoelectric crystal due to loading of the radiator caused by the coupling of ultrasonic waves into the clot or plaque.

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Rosenschein et al., "Experimental Ultrasonic Angioplasty: . . . ", JACC, vol. 15, No. 3, pp. 711-717, Mar. 1990.

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