ELECTROMECHANICAL UNIT FOR CUTTING OSSEOUS TISSUES, OSTEOTOMY, FOR INTRODUCING AND EXTRACTING RODS AT OSTEOSYNTHESIS AND FOR MASSAGE Russian patent published in 1994 - IPC

FIELD: traumatology, orthopaedics. SUBSTANCE: power supply, made in form of electron unit, has sine and saw-tooth oscillations generator, d. c. amplifier, provided with frequency and amplitude regulators. Combined rod 9, provided with removable working tool, reciprocates in bearings 19 and 16 smoothly, as well as it may perform strikes, pull and vibration motions. Bone may not be seared due to choosing optimal mode of sawing. Medium section 10 of rod 9 is made of diamagnetic material and disposed in tubular case 6. The rest parts of the rod serves like anchors 8. Permanent magnets 11 and 12 are rigidly fixed onto the anchors. The magnets are disposed relatively poles of magnetizing coil and yoke 7 at a distance, being equal to working pass of rod 9. The magnets are made for interaction with protruding buffer rubber rings 13. Key 17 excludes turning-through of rod 9. EFFECT: improved efficiency; improved safety. 3 cl, 3 dwg