Monitoring in the Intensive Care

Table 1

ScvO₂ variations related to causes of TO₂ and/or VO₂ variations.

ScvO2 < 70%		ScvO2 > 75%
Increased VO2	Decreased TO2	Decreased VO2	Increased TO2
(i) Pain	(i) Anemia	(i) Analgesia, sedation, anesthesia	(i) High Hb
(ii) Anxiety	(ii) Hypoxemia	(ii) Anxiolytics	(ii) Supplemental oxygen; ventilation/high FiO2
(iii) Fever	(iii) Low CO	(iii) Hypothermia	(iii) High CO
(iv) Shivering	(1) Hypovolemia	(iv) Muscle paralysis	(iv) Mitochondrial; dysfunction
(v) Polypnea	(a) Relative	(v) Mechanical ventilation
(vi) Respiratory distress	(b) Absolute
(vii) Increased work of breathing	(2) Vasoplegia
	(3) Myocardial depression

ScvO₂ : central venous oxygen saturation; VO₂ : oxygen consumption; TO₂ : oxygen transport; CO: cardiac output; Hb: hemoglobin; FiO₂: inspired oxygen fraction.