A clinical safety trial of stroma‐free hemoglobin

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Abstract
A stroma-free hemoglobin (SFH) solution was prepared which was sterile, pyrogen free, and contained only 1.2% of the stromal lipid present in unpurijied hemolysate, 250 ml of which was administered slowly intravenously to 8 healthy men. Two control subjects received 250 ml of serum albumin. The SFH infusions were generally well tolerated by 7 of the 8 men. One subject developed abdominal pain and costovertebral angle tenderness after infusion, which disappeared within 48 hr. Bradycardia and a mild increase in blood pressure was present during the SFH Infusions and for 4 to 5 hr thereafter. A decrease in urine output and endogenaus creatinine clearance appeared during the SFH infusions and for 2 to 4 hr after infusion. A mild prolongation of the activated partial thromboplastin time developed immediately after infusion. Gross hemoglobinuria appeared as expected during the SFH infusions and completely disappeared by 6 to 10 hr after infusion. All the cardiovascular, renal, and clotting changes were present for only a few hours after the SFH infusion, during the hemoglobinemia (free Hb in plasma). At 24 hr and 7 days after infusion all measurements were normal, and 6 mo follow-up showed no abnormalities or hepatitis.

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