Intraosseous hypertension in osteoarthritis of the hip and ischemic necrosis of the femoral head.

Intraosseous hypertension is noted both in osteoarthritis of the hip and ischemic necrosis of the femoral head. The mean intraosseous pressure in osteoarthritis cases was 30.0 +/- 4.2 mmHg. The incidence of abnormal intraosseous pressure and positive stress tests was 39% and 26.7%, respectively. In patients with ischemic necrosis of the femoral head, intraosseous pressure was 45.6 +/- 19.4 mmHg, 79% of patients had abnormal intraosseous pressure, and 56.1% had positive stress tests. Intraosseous pressure studies indicated a statistically significant difference between patients with osteoarthritis and those with ischemic necrosis of the femoral head.