Laser lithotripsy

Details Laser lithotripsy Laser lithotripsy

1990-04-06

1991-10-22

Howell, Kyle L.

Surgery

Instruments

Means for concretion removal

A61B 1722

Patent

active

050592009

ABSTRACT:
A laser lithotriptor includes a laser adapted to emit pulsed light which is absorbed by water in the vicinity of a human stone or concrement to cause rapid erosion of the stone. A light transmitting device such as a fibreoptic cable is employed inside of an endoscope to direct the laser pulses to the vicinity of the stones. An irrigation apparatus also ensures that the tip of the light transmitting device and the stone are continuously immersed in water and also serves to remove the powder-like debris of the disintegrated stone from the body. Preferably, a NdYAG laser operating at 1.44 .mu.m which emits 27 pulses per second is coupled to the body stone through an anhydrous quartz fibreoptic cable passing through the interior of an endoscope.

REFERENCES:
patent: 4266549 (1981-05-01), Kimura
patent: 4559942 (1985-12-01), Eisenberg
patent: 4583539 (1986-04-01), Karlin et al.
patent: 4799479 (1989-01-01), Spears
patent: 4932954 (1990-06-01), Wondrazeh et al.
patent: 4950266 (1990-08-01), Sinofsky
Marling, "1.05-1.44 for Tunability and Performance of the Cn Nd.sup.38 ; YAG Laser", vol. QE14, No. 1, Jan. 78, IEEE Journal of Quantum Electronics.

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