Society of University Surgeons| Volume 52, ISSUE 1, P55-59, July 1962

Anoxia of the femoral head

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      An automatic oximeter has been developed to determine at the time of initial operation which femoral head is alive and which is dead. The accuracy of prediction of avascular necrosis by the measurement of oxygen transport is in the same range of accuracy as several radioisotope methods, namely, 90 per cent or better. The instrument provides a safe, easy method for use in any local hospital, to determine whether the subcapital fracture should be reduced and pinned or whether further specific measures should be taken in the case of an avascular head.
      Experimental evidence indicates that displacement or volvulus of a subcapital fracture in dogs results in a vascular obstruction. If unrelieved, the anoxia leads to infarction of the bone in all cases within 12 hours, and in 50 per cent of cases, within 6 hours. This experimental proof of a dynamic factor of vascular occlusion and a time limit for anoxia of bone may have a direct bearing on the emergency treatment of displaced subcapital fractures in the human.
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        The radiographic density of avascular bone.
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        Radio-sodium clearance rates as indicators of femoral head vascularity.
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        American Academy of Orthopaedic Surgeons, January, 1962
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        Experimental production of avascular necrosis of the capital femoral epiphysis by extreme internal rotation of the hip, read at the 8th Annual Meeting. Orthopaedic Research Society, Chicago, Ill.,January, 1962
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        An instrument for the measurement of oxygen tension in bone. A preliminary report.
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        American Academy of Orthopaedic Surgeons, Chicago, Ill.,January, 1962