AUTOMATIC PROGRAMMED COMPRESSION-DISTRACTION APPARATUS Russian patent published in 1996 - IPC

FIELD: medical engineering. SUBSTANCE: distraction process is carried out in continuous mode during the whole treatment course by means of autonomous control unit provided with power supply source, apparatus switching frequency and one microdistraction value are easily set in wide range by means of control unit commutation members. The device has detachable bearing rings connected with each other by means of self-braking distractors developed for this particular device on the basis of roller-and- screw transmissions with intermediate rolling bodies between screw and bolt, needle holder rings with needles. Each threaded bar of the distractor is set in rotation by means of electromotor connectable to the control unit having autonomous power supply source and providing for each distractor movement speed stabilization independently on load value. It is essential that screw pairs can operate without lubrication and the control unit enables any distractor to be switched off or set in reversed motion to enable angular correction of movable ring plane position. EFFECT: lowered risk of traumatic complications; improved regeneration of bone tissues. 2 dwg