Law E G, Heistad D D, Marcus M L, Mickelson M R
J Pediatr Orthop. 1982 Jun;2(2):133-7. doi: 10.1097/01241398-198202020-00003.
Utilizing radioactive microspheres, blood flow to the femoral head of immature dogs was measured. Blood flow was measured with the leg in the control position, maximal abduction, submaximal abduction, and the human position of hip immobilization. Maximal abduction (to 90 degrees) significantly decreased flow to the capital femoral epiphysis. Submaximal abduction and the human position did not reduce blood flow. Measurement of flow in the control position immediately after forced abduction demonstrated marked reactive hyperemia. These data indicate that ischemia occurs during 90 degrees forced abduction of the hip. This finding supports the use of lesser degrees of abduction for hip immobilization in the treatment of congenital dislocation of the hip. The vascular anatomy of the head of the femur in puppies and children suggests that these data can be extrapolated to man.
利用放射性微球，测量了未成熟犬股骨头的血流量。在腿部处于控制位置、最大外展、次最大外展以及髋关节固定的人体位置时测量血流量。最大外展（至90度）显著降低了股骨头骨骺的血流量。次最大外展和人体位置并未减少血流量。在强制外展后立即测量控制位置的血流量，显示出明显的反应性充血。这些数据表明，在髋关节90度强制外展时会发生局部缺血。这一发现支持在治疗先天性髋关节脱位时使用较小程度的外展来固定髋关节。幼犬和儿童股骨头的血管解剖结构表明，这些数据可以外推至人类。
