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The magnitude of hypoxemia in elderly patients with fractures of the femoral neck.

Because elderly patients with fractures of the femoral neck have been said to be hypoxemic (l), we undertook a study to determine whether differences in arterial oxygen tension (Pao,) levels in elderly patients with femoral neck fractures and in a comparable group of elderly patients scheduled for abdominal or urologic procedures were statistically significant, and if so, whether the differences were related to a decrease in platelet counts normally associated with femoral neck fractures in geriatric patients.