[The effect of several factors on the osmotic resistance of erythrocytes].

Measurements of red cell osmotic resistance in urea test have shown the stabilizing effect of hydrocortisone and ascorbic acid on red cell membrane permeability. This permitted a conclusion on the fitness of the test for assessment of the drug effects on red cell membrane permeability and on the possibility of the use of this test in choosing an individual dose of UV irradiation.