The hospital records of 58 premature infants in whom proliferative retrolental fibroplasia (RLF) developed were matched with the records of 58 infants without RLF for birth weight, gestational age, and duration of oxygen therapy. The two groups were compared for factors likely to influence tissue delivery of oxygen by blood. No significant difference was found in incidence of blood transfusions or exchange transfusions, use of phototherapy, or occurrence of acidosis.

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