METHOD AND DEVICE FOR DESTROYING BIOLOGICAL TISSUES Russian patent published in 1996 - IPC

FIELD: medicine. SUBSTANCE: method involves step-by-step exposing pathologically changed biological tissue area to low frequency ultrasonic radiation and cryogenic action. One or multiple alternations of distant cryogenic action with cooling agent jet are applied to biological tissue surface layer at the first stage, with cooling the layer to minus 130-150 C and low frequency ultrasonic contact action applied to an injured area of the biological tissue when wave guide working end amplitude is equal to 40-45 μm. At the end stage, low frequency ultrasonic contact action is applied with wave guide working end amplitude being equal to 65-70 mcm. The device has ultrasonic radiation emitter in casing and wave guide with working end connected to it. Hollow cantilever member rigidly connected with the emitter is mounted on the casing, where high pressure reservoir with cooling agent is placed. Capillary openings, throttles, are made in the wave guide, one of which is on the wave guide axis and others are brought aside at an angle to the central one. Openings outputs are on the working end and the axial opening is connected with the high pressure reservoir provided with control valve and lever by means of pipeline. EFFECT: lowered dissemination cells from biological tissue destruction zone. 3 cl, 6 dwg