Table 2. Environmental, Hemodynamic, Respiratory, and Thermoregulatory Data

All values were averaged or integrated over 3–8 elapsed hours, corresponding to the period of epidural analgesia or intravenous fentanyl administration. Data are presented as mean ± SD.

* Statistically significant differences from intravenous fentanyl. There were no significant differences among the other treatment groups.

Pco²= partial pressure of carbon dioxide.