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Table 1 The relative contribution of [Hb], inspired oxygen and tHb-mass on oxygen-carrying capacity

From: Anaemia secondary to critical illness: an unexplained phenomenon

  Normal Anaemic Anaemic + oxygen Decreased tHb-mass
Inspired oxygen (%) 21 21 100 21
PaO2 (kPa) 12 12 85 85
SaO2 (%) 98 98 98 98
Hb concentration (g/L) 150 75 75 75
Dissolved oxygen (ml/L) 3 3 19 3
Hb bound oxygen (ml/L) 197 98 98 98
tHb-mass (g) 750 500 500 400
Total CaO2[Hb] (ml/L) 200 101 117 101
Total CaO2 (tHb-mass) (ml) 988 660 676 528
  1. Adapted from SA McLellan [85] with permission. PaO2, arterial partial pressure of oxygen; SaO2, arterial oxygen saturation; tHb-mass, total haemoglobin mass; CaO2 [Hb], oxygen-carrying capacity using [Hb]; CaO2 [tHb-mass], oxygen-carrying capacity using tHb-mass.