Abstract
1 . Intertrochanteric osteotomy is valuable in the treatment of patients with osteoarthritis of the hip, giving a high percentage of satisfactory results. It often relieves the pain immediately, is long-lasting in its effects, and may even increase the range of movement.
2. There is no evidence from our figures that the extent of medial displacement of the lower fragment influences the result as judged from relief of pain, performance, and the patient's assessment. Movement, however, is less improved if displacement exceeds half the diameter of the divided bone.
3. Our observations did not support the view that improvement is caused by a changed relationship between the upper fragment and the acetabulum. When measurements were possible the position of the upper fragment usually remained virtually unaltered.
4. Our figures confirm that in most patients relief of pain is immediate; that is to say, the patient is aware on regaining consciousness that his pain has gone, even though he formerly had pain at rest. Whatever may be the mechanism that relieves the pain, it acts immediately.
