Specificity of ScvO2 in diagnosing reduced systemic vascular resistance comparing to PiCCO Diagnosed by ScvO2 Diagnosed by PiCCO Positive Negative Total Positive 5 3 8 Negative 1 38 39 Total 6 41 47 Based on PiCCO, when ScvO2 ≥ 70% in patients with mean blood pressure <65 mmHg, it is possible to diagnose 62.5% of cases with decreased systemic vascular resistance.