The evaluation of a photometer (the Radiometer OSM2) for the determination of haemoglobin concentration and per cent oxyhaemoglobin and carboxyhaemoglobin in blood.J Med Eng Technol. 1981 Nov; 5(6):298-300.JM
Haemoglobin concentration and its saturation with oxygen and carbon monoxide were estimated in identical blood samples using an automated two-wavelength photometer (the Radiometer OSM2) and standard methods. The instrument was easy to operate and maintain and, in general, was accurate and repeatable. At carboxyhaemoglobin levels below 1.5%, however, the precision of the instrument was poor.