Figure 3
From: Central venous oxygenation: when physiology explains apparent discrepancies
Frequency distribution of mixed venous oxygen hemoglobin saturation in two populations of patients. Left: a modeled population of 1,000 patients (JMP, SAS Institute, Cary, North Carolina, USA) as seen in Figure 2 but mimicking a standard ICU population by computing random gender, normal distribution of age (60 ± 12 years), temperature (37.5 ± 1.2°C), hemoglobin concentration (100 ± 15 g/L) and semi-normal distribution of arterial oxygen hemoglobin saturation (1 to 0.05) and assuming no total body oxygen consumption (VO2) gap. Right: a real population of post-cardiosurgery unshocked steady state patients (assuming no VO2 gap) with a wide range of changes in mixed venous oxygen saturation (SvO2) components (15,860 measurements obtained from a previously published study) [64].