Comparisons of physiological variables in wake, m-PIS and d-PIS states (N = 12).

<p>There were no significant differences in HR, SpO2, PetCO2 between states, but significant differences in MAP between wake and d-PIS states (repeated-measures ANOVA, * P<0.01, compared with wake state). HR, heart rate; SpO2, oxyhemoglobin saturation; MAP, mean artery pressure; PetCO2, end-tidal carbon dioxide.