METHOD FOR MULTIAPEX DEFORMITIES CORRECTION OF LONG BONES Russian patent published in 2025 - IPC A61B17/62 A61B17/66 A61B6/03 A61B6/50 

FIELD: medicine.

SUBSTANCE: invention refers to medicine, namely to traumatology and orthopaedics, and can be used for correction of multilevel long bone deformities. Transosseous elements are delivered, and proximal, distal and intermediate supports of an external fixation apparatus are mounted. Osteotomies are performed at the level of each apex of deformation. Orthopaedic hexapod is assembled, in the computer program of which initial X-ray images, parameters of the hexapod and parameters of the required position of the fragments are entered. Axes of the distal and proximal fragments are virtually marked and matched, the correction results are simulated, and the final position of the intermediate fragment is marked. Material template of the intermediate fragment is made, which is used to measure the lengths of each of the distraction regenerates, as well as to calculate the length variations of each of them at the proximal osteotomy levels over the correction period. Greatest regenerate length change is specified, and an optimal number of correction days is determined by dividing the chosen regenerate length change by a planned rate of correction. Calculated number of correction days is entered into a computer program to generate a correction schedule. After the correction is completed, the elastic tie-rods and strata of the hexapod are replaced with fixed hinge joints or with straight threaded rods.

EFFECT: method enables reducing a risk of complications related to an incorrectly specified number of correction days, including a risk of premature consolidation, regenerate rupture and neuropathy, due to a set of techniques of the declared invention.

5 cl, 49 dwg, 1 ex