Table 1. Caval Vein Pressures and Related Variables of Patients Undergoing Intraperitoneal or Left or Right Retroperitoneal^*CO²Insufflation

Data are mean ± SD from 20 anesthetized patients undergoing either intraperitoneal (n = 8) or left (n = 6) or right (n = 6) retroperitoneal (prone position) CO²insufflation. P  values in parenthesis derive from one-way** (insufflation pressure) and two-way (insufflation pressure × group) analysis of variance for repeated measurements within and across groups, respectively, as appropriate.

*P < 0.05 versus  group baseline.

†P < 0.05 for comparison between groups at same insufflation pressure.

‡P < 0.05 versus  group desufflation.

§P < 0.05 versus  corresponding left retroperitoneal value.

∥P < 0.05 versus  preceding group value.

#P < 0.05 versus  10 mmHg insufflation pressure.

ANOVA = analysis of variance.