METHOD FOR CHOOSING MODE OF POSTOPERATIVE REHABILITATION AFTER HIP REPLACEMENT IN PATIENTS WITH EXTENSIVE BONE DEFECTS IN ACETABULUM Russian patent published in 2021 - IPC A61B5/103 

FIELD: medicine, namely to traumatology and orthopedics.

SUBSTANCE: invention relates to medicine, namely to traumatology and orthopedics, and can be used to select the mode of postoperative rehabilitation after revision hip replacement in patients with extensive bone defects in the acetabulum. After combining the preoperative model of the pelvis and the acetabulum component, its virtual removal is performed and, thus, an imprint of the planned contact surface of the acetabulum component is obtained on the bone bed of the acetabulum area. Next, the area of the resulting print is determined. A postoperative pelvic model with an implanted acetabulum component is combined with a preoperative pelvic model using identically installed points. Then the postoperative pelvic model is removed, retaining the acetabulum component. Then, the implanted acetabular component is removed from the preoperative pelvic model and, thus, an imprint of the actual contact surface of the acetabular component installed during the operation is obtained. The area of the resulting print is determined. The percentage of the footprint area of the actual contact surface to the footprint area of the planned contact surface is calculated. If the obtained value of the actual contact surface is more than 60% of the planned one, a postoperative rehabilitation regime is chosen, which involves walking with a dosed load on the operated limb for 4 weeks with two crutches, then another 2-4 weeks with one crutch, and then 2-4 weeks with a cane; if the obtained value of the actual contact surface is less than 60% of the planned one, a postoperative rehabilitation regime is chosen, which involves walking with a dosed load on the operated limb for 8 weeks with two crutches, then another 8 weeks with one crutch, and then 8 weeks with a cane.

EFFECT: method provides prevention of the development of aseptic loosening of the revision acetabulum component of a high complexity of the geometry of the contact surface, as well as improves the effectiveness of hip replacement by determining a rational rehabilitation regime based on an assessment of the area of the actual contact surface of the installed acetabulum component with a bone bed.

1 cl, 10 dwg, 1 ex