Extracorporeal lithotripsy apparatus using high intensity shock

Details Extracorporeal lithotripsy apparatus using high intensity shock Extracorporeal lithotripsy apparatus using high intensity shock

1989-08-11

1991-04-23

Smith, Ruth S.

Surgery

Truss

Pad

128 24EL, A61B 1722

Patent

active

050092324

ABSTRACT:
An apparatus for extracorporeal lithotripsy includes a shock wave source which generates shock waves converging in focus a zone, within which a calculus to be disintegrated is disposed. The shock wave source can be selectively driven to generate high-intensity shock waves for disintegrating the calculus, and for generating low-intensity shock waves for imaging purposes. A pressure sensor is disposed between the focus zone and the shock wave source to register the reflections of the low-intensity shock waves. The pressure sensor has a sensor surface which is substantially coextensive with the cross-sectional area of the shock waves in the region of the pressure sensor, and is connected to a reception circuit which constructs an image of the calculus during the course of treatment based on the signals from the pressure sensor. An acoustic deflection stage is disposed between the pressure sensor and the focus zone and deflects the low-intensity shock waves to generate a sector scan which covers the focus zone of the high-intensity shock waves. The reception circuit can be operated for producing B-images.

REFERENCES:
patent: 3913061 (1975-10-01), Green
patent: 4131021 (1978-12-01), Mezrich et al.
patent: 4526168 (1985-07-01), Hassler et al.
patent: 4674505 (1987-06-01), Pauli et al.
patent: 4771787 (1988-09-01), Wurster et al.
patent: 4803995 (1989-02-01), Ishida et al.
patent: 4834106 (1989-05-01), Hassler et al.

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