Shock wave generator for an extracorporeal lithotripsy apparatus

Details Shock wave generator for an extracorporeal lithotripsy apparatus Shock wave generator for an extracorporeal lithotripsy apparatus

1988-07-19

1990-11-27

Howell, Kyle L.

Surgery

Truss

Perineal

12866301, 367152, A61B 1722

Patent

active

049728261

ABSTRACT:
A shock wave generator for use in an extracorporeal lithotripsy apparatus has a liquid-filled housing with an exit aperture for shock waves which are electromagnetically generated and conducted to a focusing element for focusing onto the calculi, and a plate-shaped element having a smaller cross-sectional area than the emitted shock wave is disposed in the path propagation of the shock wave. The plate-shaped element consists of a material having an acoustic impedance substantially corresponding to the acoustic impedance of the liquid in the housing, and having a propagation speed of sound therein which deviates from the propagation speed of sound in the liquid.

REFERENCES:
patent: 3362501 (1968-01-01), Lenahan
patent: 4718421 (1988-01-01), Rohwedder et al.
patent: 4721108 (1988-01-01), Heine et al.
"Ultrasonics", vol. 7, No. 2, Apr. 1969, Acoustic Lens Design, pp. 98-100.

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