Weight bearing after hip fracture: a prospective series of 596 geriatric hip fracture patients.

Five hundred ninety-six patients age > or = 65 with femoral neck or intertrochanteric fractures were allowed immediate unrestricted weight bearing after surgery and were prospectively followed. Follow-up data and hospital records were examined to identify those patients who required additional hip surgery owing to failure of fixation, nonunion, osteonecrosis, or prosthetic dislocation. Four hundred seventy-three patients were available for 1-year minimum follow-up; 16 patients (3.4%) required additional hip surgery. The revision surgery rate after intertrochanteric fracture due to loss of fixation was 2.9%. The revision surgery rate after internal fixation of the femoral neck from loss of fixation/nonunion was 5.3%; the revision rate from osteonecrosis for patients with 2-year follow-up was 5.4%. The revision rate after hemiarthroplasty due to prosthetic dislocation was 0.6%. These results support the use of unrestricted weight bearing in elderly patients after hip fracture surgery.