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Albumin inhibits hemolysis of erythrocytes induced by ethanolamine oleate during endoscopic injection sclerotherapy.

In attempts to avoid hemolytic nephropathy following injection of 5% ethanolamine oleate during endoscopic injection sclerotherapy for esophageal varices, the relationship between serum levels of albumin and hemolysis induced by ethanolamine oleate was investigated. The rate of hemolysis at various concentrations of ethanolamine oleate and albumin was examined using a spectrophotometer in ten cirrhotic patients and five healthy volunteers (controls). Hemolysis induced by ethanol-amine oleate increased in an ethanolamine oleate concentration-dependent fashion (p < 0.01) but was dose-dependently inhibited by albumin (p < 0.05). The state of liver function was unrelated to the rate of hemolysis. The relationship between hemoglobinuria and serum albumin levels in seventy-nine cirrhotic patients with esophageal varices treated by endoscopic injection sclerotherapy with ethanolamine oleate was also examined. Hemoglobinuria was evident in 20 out of 24 patients (83.8%) in whom the serum albumin level was less than 3.0 g/dl, and in 24 out of 55 (43.6%) in whom it exceeded 3.0 g/dl, the difference being statistically significant (p < 0.01). On the day after endoscopic injection sclerotherapy, creatinine clearance fell from 81.6 +/- 33.8 m/l min to 60.1 +/- 31.4 ml/min in the hemoglobinuria-positive patients (p > 0.01) and two went into acute renal failure. The creatinine clearance ranged from 79.5 +/- 27.9 ml/min to 83.0 +/- 39.9 ml/min in the hemoglobinuria-negative patients (p < 0.1). In the light of this evidence we correct the serum albumin level cut off point to 3.0 g/dl prior to endoscopic injection sclerotherapy in order to maintain renal function.