[Measurement of endogenous carbon monoxide increase in the blood as a criterion of systemic hemolysis].

Using a closed to-and-from respiratory system and measuring the COHb level in capillary blood the rise in endogenous carbon monoxide level in the blood was determined in 15 patients with haemolytic anaemia and in 6 healthy subjects. An evident rise in CO concentration with raised COHb level in the blood was found in all patients with haemolytic anaemia.