METHOD OF PREDICTING COURSE OF LEGG-CALVE-PERTHES DISEASE

摘要

FIELD: medicine.;SUBSTANCE: invention relates to field of medicine, namely to X-ray diagnostics. On pelvis X-ray, made in direct projection arch (a) is drawn on upper edge of acetabulum, which is continued downwards medially to the level of "tear figure". Horizontal line (b) is drawn on upper edge of hip head and vertical line (c) is drawn on medial edge of hip head. The greatest distances between arch and lines - segments AB and CD are measured. Value of degree of hip head decentration is calculated in % by formula: DD=100-AB/CD × 100%, where DD is degree of hip head decentration in %; AB is width of medial space of acetabulum, distance between lines (a) and (b); CD is width of upper space of acetabulum, distance between lines (a) and (c). If value of decentration degree constitutes more than 12%, unfavourable outcome of Legg-Calve-Perthes disease is predicted and surgery is recommended to patient. If value of decentration degree equals or is lower than 12%, favourable outcome of Legg-Calve-Perthes disease course is predicted and conservative treatment of Legg-Calve-Perthes disease is recommended.;EFFECT: method makes it possible to determine risk of pathologic process development and select correct tactics of patient's treatment.;2 ex, 3 dwg