ACETABULOPLASTY METHOD IN CHILDREN WITH INFANTILE CEREBRAL PARALYSIS Russian patent published in 2019 - IPC A61B17/56 A61B6/03 

FIELD: medicine.

SUBSTANCE: invention refers to orthopedics and can be used for correction of cotyloid dysplasia in surgical treatment of hip dislocation in hip joint in children with infantile cerebral paralysis (ICP). Computed tomography is performed in the central parts of the cotyloid cavity in frontal and sagittal planes. Value of required correction and sizes of autograft required for creation of normal mutual relations in a joint are determined. Sections are used to measure parameters: frontal plane is used to define acetabular index, to compare it with normal indices. If observing discrepancy on norm in frontal plane, angle corresponding to normal indices of acetabular index is plotted. That is ensured by drawing a line from the centre of the Y-shaped cartilage towards the upper end of the roof of the acetabulum at an angle corresponding to the norm; a perpendicular line to this norm line is drawn from an upper end of the acetabulum. Length of perpendicular line corresponds to value of required correction and height of autograft in frontal plane. In the sagittal plane, the angle of inclination of the cotyloid cavity is determined; a line connecting the anterior and posterior edges of the cotyloid cavity is made on a cut. Across the posterior end of the cotyloid cavity, a horizontal line is drawn, an angle between the drawn lines is measured, the value of the obtained angle is compared with the normal values; if the angle mismatch is found on the line connecting the anterior and posterior edges of the cotyloid cavity, the middle is determined. Perpendicular line equal to the perpendicular line defined on the frontal section is drawn from the middle. Line is drawn through an end of the perpendicular line at an angle to a horizontal line corresponding to the norm. Perpendiculars to this line are lowered from front edge and posterior edge of cotyloid cavity. Length of produced perpendiculars corresponds to value of required correction and height of autograft in sagittal plane. Surgical intervention is performed. Autograft is prepared. Height of perpendiculars on sections in sagittal and frontal planes corresponds to sizes of autograft. That is followed by partial osteotomy, placing the autograft corresponding to the size of the correction, and positioning the autograft.

EFFECT: method provides stable position of femoral head in hollow and normal functioning of hip joint in children with infantile cerebral paralysis ensured by geometrical constructions by sections in central parts of cotyloid in frontal and sagittal planes.

1 cl, 3 dwg