DISTRACTION APPARATUS FOR FINGER FORMATION IN CHILDREN Russian patent published in 2014 - IPC A61B17/56 A61B17/66 

FIELD: medicine.

SUBSTANCE: distraction apparatus consists of one basic/first oval closed two-plane ring, two oval long semi-rings (second and third) for the II-V fingers and two oval short semi-rings (fourth and fifth) for the I finger. All five elements are rigidly fixed to each other and to the basic/first two-plane ring by means of five braces with a thread and nuts, as well as to the hand bones by pins in the quantity required. The basic/first oval closed two-plane ring has an inclination of 150° taking into account the physiological deviation of the I metacarpal. The supports are fixed by pins to the hand bones in the quantity required. The fingers are formed by rotating the nuts above and below the distal third and fifth semi-rings about the braces four times a day, every 3-4 hours by 90-360° for one day that leads to the gradual travel of the distal semi-rings every time distracting the distal fragments of the extensible bones by 0.1-0.25 mm, and elongating the phalanxes of the formed fingers by 0.4-1.0 mm a day. The invention enables reducing the number of complications in the form of deformities of the formed bone regenerate. Using the apparatus avoids the rotation effect related to the nuts rotation on the distraction brace preventing the regenerate breakage and injuries in the extensible finger segment in the distraction procedure.

EFFECT: using the given distraction apparatus for the fingers formation in children provides the higher clinical effectiveness and quality in the patients with traumatic defects and congenital deformities of the fingers.

2 ex, 2 dwg