GRADUATED DISTRACTION DEVICE Russian patent published in 2014 - IPC A61B17/56 A61B17/66 

FIELD: medicine.

SUBSTANCE: device comprises two distraction assemblies - the first one - for the first and second phalanges, and the second one - for the second and third phalanges. Each assembly is presented in the form of a pair of threaded rods, at the ends of which there are mounted two axially gradually movable arched supports. Each of the supports is provided with bone fixative holes at the ends. The holes of the adjacent arched supports of the first and second distraction assemblies are combined thereby creating an axis of rotation. In this pair, the arched support of the second assembly has a radius smaller than the radius of the arched support of the first assembly by a value to ensure combining them on the single axis and at different levels. At the top of the arched support with the smaller radius, there is an eye having an elongated hole, either fixed directly, or turning around. An eye body is curved at an angle of up to 175 degrees, and is coupled with one end of the flexing-extending threaded rod; the other end is provided with an end eye for the joint connection with a U-bracket fixed on the top of the adjacent arched support of the greater diameter of the first distraction assembly.

EFFECT: invention provides the distraction of tendons, cicatrices, digital joints of the fingers if observing their full contracture, with eliminating a risk of the distraction injury, simplifying the structure and adjustment, and ensuring the follow-up of the postoperative field in service.

4 cl, 5 dwg