Apparatus for the noninvasive shock fragmentation of renal calcu

Details Apparatus for the noninvasive shock fragmentation of renal calcu Apparatus for the noninvasive shock fragmentation of renal calcu

1984-02-22

1986-09-02

Coven, Edward M.

Surgery

Truss

Pad

128328, 128369, A61B 1722

Patent

active

046089799

ABSTRACT:
Concretions, such as kidney stones, are nonsurgically fragmented by apparatus which produces focused shock waves. A truncated ellipsoidal reflector is positioned against the patient such that one focus thereof is coincident with the concretion. The reflector is filled with a liquid medium having an acoustical impedance similar to living tissue. A laser beam is focused at the remaining focus, thereby producing a shock wave which is coupled through the liquid medium and the patient's tissue and focused at the concretion. By controlling the energy level and duration of the laser beam, a fragmenting tensile stress is imparted to the concretion.

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