EXTRACTOR FOR EXTRACTION OF URETER STONES Russian patent published in 2019 - IPC A61B17/221 

FIELD: medicine.

SUBSTANCE: proposed invention refers to medical equipment, namely to an extractor for extraction of ureter stones. Extractor comprises bearing wire of steel wire placed in flexible tubular housing. Working part of carrying rope is made of metal with shape memory, having initial temperature of martensitic transformation from 37 to 42 °C and receiving at heating above temperature of martensitic transformation form of conical spiral. Below temperature of martensitic transformation working part has linear shape. Metal tip is fixed on the distal end of the flexible tubular body, and a control handle is fixed on the proximal end of the flexible tubular body. Control handle is connected to the tip by metal control cables and the distal end of the flexible tubular case. End of the bearing cable leaving the proximal end of the extractor is bent in the form of a loop, which serves to push the working part out of the flexible tubular body, as well as to draw it into the body. In the handle, there are electric heating elements for heating of the working part, in the distal part of the flexible tubular housing the bushing is rigidly installed. Fixing handle is fixed on the body before the control handle.

EFFECT: reduction of injuries.

1 cl, 4 dwg