Figure 1

Suboptimal Ventilation. a) Frequency of suboptimal ventilation rates (< 8 VPM or > 10 VPM). b) Frequency of suboptimal tidal volumes (< 480 ml or > 560 ml). c) Frequency of suboptimal minute volumes (< 3840 ml or > 5600 ml). Black shade: denotes hypoventilation; Light shade: denotes guideline consistent ventilation; Dark shade: denotes hyperventilation. All measurements are based on mean values calculated over the two minute period.