Ankylosing Spondylitis Involves Hip-Intraoperative and Postoperative Complications

The sciatic nerve of patients who have ankylosing spondylitis is often close to the posterior acetabular wall and femoral neck, which is in danger when performing THA in the posterior approach. Especially when the ankylosing hip joint requires in situ osteotomy, the operating space is too small to hurt the sciatic nerve by oscillating saw. Therefore, more extensive exposure of surrounding soft tissue, retracting the sciatic nerve fully and carefully, and use of the reciprocating saw, rather than the oscillating saw, are required in in situ femoral neck osteotomy. When the ankylosing hip is fused in the position of abduction and external rotation, the posterior operation space is small extremely, then the femoral neck osteotomy can be performed in front of the femoral neck under the same exposure or use the Hardinge approach.