title: [Calculated and measured oxygen saturation. A valid comparison of the Kelman, Severinghaus, and Siggaard-Anderson formulas for calculating oxygen saturation of patients in intensive care].
abstract: The validity of calculation of oxygen saturation by means of Kelman's, Severinghaus ' and Siggaard -Andersen's formulas was investigated in 329 arterial and 26 mixed venous blood samples of intensive-care patients. The spectrophotometric measurement of oxygen saturation with Radiometer's Hemoximeter OSM2 served as reference. In spite of good coefficients of correlation regarding the total number of samples (r 0,963/ Kelman's formula; r = 0,964/ Severinghaus and Siggaard -Andersen's formula) there were not as satisfactory correlations in some individual patients. The study shows that there was a decrease in conformity between measured and calculated oxygen saturation with decreasing oxygen tension in the blood. Sufficient accuracy of calculation of saturation can be expected only with pO2 greater than 80 mmHg. Siggaard -Andersen's formula was slightly superior to the other tested algorithms.
mesh_terms: D000328:Adult; D000368:Aged; D001784:Blood Gas Analysis / Q000379:methods*; D003422:Critical Care; D005260:Female; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008297:Male; D008433:Mathematics; D008875:Middle Aged; D010100:Oxygen / Q000097:blood*; D010313:Partial Pressure; D013461:Sulfur Oxides / Q000097:blood
chemical_list: D013461:Sulfur Oxides; D010100:Oxygen
vernacular_title: Berechnete und gemessene Sauerstoffsättigung. Ein wertender Vergleich der Kelman-, Severinghaus- und Siggaard-Andersen-Formeln zur Sauerstoffsättigungsberechnung bei Patienten einer Intensivstation.