Figure 3.

Nomogram showing CI, SvO₂ and VO₂ isopleths (dotted black lines). The green point shows the expected values for a 59-year-old woman at basal metabolism, and the green dotted arrow indicates the expected normal variations in case of hypo- or hypermetabolism. The real position of the patient in the nomogram can be continuously monitored. This is adequate for diagnostic purposes. The patient's position can move from the normal profile to a characterized area of septic or cardiogenic shock (grey dotted arrows and areas). However, for therapeutic objectives, this nomogram gives no idea of needs. If we made the hypothesis that the ⁿVO₂ (red isopleth) is higher than the ^oVO₂, then the red double arrow indicates the difference between ⁿVO₂ and ^oVO₂. Units for CI are l/min per m² and for VO₂ they are ml/min per m². CI, cardiac index; ^(n/o)VO₂, (needed/observed) oxygen consumption; SvO₂, mixed venous oxygen saturation.