Method and device for disintegrating stones in human ducts

Details Method and device for disintegrating stones in human ducts Method and device for disintegrating stones in human ducts

1975-11-28

1977-06-21

Michell, Robert W.

Surgery

Truss

Pad

128 24A, 128243, A61B 1722

Patent

active

040305058

ABSTRACT:
Method and device for disintegrating concretions, or sclerotic clots within human ducts. The method and system are particularly adapted to disintegrating stones in the ureter and kidney, as well as the bladder. The method includes axially abutting the concretion within the human duct while outwardly distending the walls of the duct adjacent the concretion, directing a series of high voltage, low amperage pulses into the ducts and discharging the pulses radially outwardly across the surface of the concretions, while flowing a liquid peripherally of the discharging pulses, so as to direct an hydroelectric impact against the concretion. The outward distending of the walls and the flowing liquid, particularly in narrow human ducts such as the ureter, prevent tissue damage by shock and burning.

REFERENCES:
patent: 872217 (1907-11-01), Bonesteel
patent: 3413976 (1968-12-01), Roze
patent: 3735764 (1973-05-01), Balev et al.
patent: 3827437 (1974-08-01), Inaba
patent: 3831585 (1974-08-01), Brondy et al.
patent: 3902499 (1975-09-01), Shene

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