METHOD FOR CALCANEAL OSTEOTOMY FOR CORRECTION OF PES PLANOVALGUS DEFORMITY WITH DETERMINATION OF CALCANEAL BONE OSTEOTOMY LEVEL Russian patent published in 2025 - IPC A61B17/56 A61B6/03 

FIELD: medicine.

SUBSTANCE: invention refers to medicine, namely to traumatology and orthopaedics, foot surgery, and can be used for calcaneal bone osteotomy for correction of pes planovalgus deformity with determination of calcaneal bone osteotomy level. Method for performing an osteotomy of the calcaneal bone for the correction of a pes planovalgus deformity with determining the level of the calcaneal osteotomy, involving imaging the foot, determining the level of the calcaneal osteotomy. Multispiral computed tomography is performed; the obtained MSCT data are used to recreate 3D model of the calcaneal bone with visualization of facets of the subtalar joint. Subtalar joint facets position and shape are determined. Osteotomy line is drawn between the facets. Perpendicular is lowered from a calcaneal-cuboid joint to an osteotomy line, and an inclination angle of the osteotomy line relative to an external wall of the calcaneal bone is determined. Guide wire is made in accordance with Fig. 5, in which the BC distance corresponds to the perpendicular from the calcaneal-cuboid joint to the osteotomy line, the BCD angle corresponds to the angle of inclination of the osteotomy line relative to the outer wall of the calcaneal bone. Surgical approach is performed over an anterior process of the calcaneal bone. Skin and underlying soft tissues are dissected in layers; an anterior process of the calcaneal bone is skeletonized; two retractors are inserted. Calcaneo-cuboid joint is separated, and the guide wire is inserted with the AB section into the cavity of the calcaneo-cuboid joint so that the BC portion coincides with the perpendicular on the calcaneo-cuboid joint and the BCD angle on the guide wire corresponds to the inclination angle of the osteotomy line. Pendulum saw is placed in the vertex C of the BCD angle on the guide wire, and an osteotomy is performed along the CD portion of the guide wire. Deformity is corrected by displacement of the calcaneal bone fragments with fixation with a plate and bone grafting of the defect.

EFFECT: method provides accuracy of execution and, as a result, reduction of complications due to use of constructions and guide wire.

1 cl, 14 dwg, 1 ex