Table 1. Vital Signs and Drug Concentrations

Values are given as group mean ± SD.

* Significance of change versus  awake:P < 0.05.

† Significance of change versus  awake:P < 0.01.

‡ Significance of change versus  sevoflurane alone:P < 0.05.

§ Significance of change versus  sevoflurane alone:P < 0.01.

ANOVA = analysis of variance; CO²= carbon dioxide; MAP = mean arterial pressure; N²O = nitrous oxide; NS = not signifiant; P = propofol; Paco²= arterial carbon dioxide tension; P+N = propofol plus nitrous oxide; S = sevoflurane; S+N = sevoflurane plus nitrous oxide.