SURGICAL TOOL FOR STONE BREAKING UP OR BONE DRILLING Russian patent published in 2008 - IPC A61B17/16 A61B17/225 

FIELD: medicine, surgery.

SUBSTANCE: transcutaneous surgical tool for breaking up stones or drilling bone contains converter for generation of vibrations on ultra-sound frequencies, horn, support, fixed and floating prods and fixed and floating prods having cutting tips of various configuration. Horn is connected with converter for enhancing converter vibration. Prods are capable of being disconnected from support. Each fixed prod is attached to said horn for linkage with stones and introduction of ultra-sound fluctuations in them. Floating prod is located concentrically and can slide over said fixed prod. Between horn and floating prod there is free mass for causing fluctuation between them and low-frequency co-hitting with stones, in response to converter vibrations. As a result, tool with double prod is created, which combines frequency of 20 kHz or higher and hits with high energy on low frequencies, for instance, lower than 1 kHz. When using concentrical prods, open space can be formed between them, which allows performing sucking-up to remove stones or stone fragments from patient's body.

EFFECT: increased efficiency of tool action.

24 cl, 4 dwg