DEVICE FOR EXTENDING NERVE PIPES Russian patent published in 2006 - IPC A61B17/00 A61B17/04 

FIELD: medicine; traumatology; neurological surgery; recovery surgery.

SUBSTANCE: device has drive mechanism and traction units disposed onto base. Base is mounted in case with lugs. Lugs have openings for osseous screws. Screws are provided with protruding button for finding them under skin. Edge is mounted with its protrusions onto side surfaces in guides of case walls' grooves. Drive mechanism has two similar ratchet-and-pawl gears. The latter are disposed onto parallel axes at the same level counting from base. Teeth of wheels have inclination to meet each other. Button is disposed between ratchet-and-pawl gear and it is put onto cylindrical spring. Open one-sided groove is made onto side surface of button at the side where ratchet-and-pawl gears are mounted. Groove is oriented in parallel to axes of ratchet-and-pawl gears. Base of flat symmetrical flat with z-shaped free ends is disposed inside in groove. Any end of spring is engaged with its ratchet-and-pawl and it is made in form of catch. Jaws, disposed at axes being shared with ratchet-and pawl gears, form coils with ratchet-and-pawl gears for flexible couplings of traction units. One end of links is attached to jaws. Other ends are withdrawn outside through openings at opposite side of case. Additional catch in form of symmetrical spring is mounted onto base. Bent out ends of spring are engaged with their ratchet-and-pawl gears.

EFFECT: reduced traumatism; improved results of cure.

2 cl, 1 dwg