Figure 6. Endothelial-dependent relaxation to acetylcholine (Ach, 10−5 mol/L). A1, inflow first-order arteriole; pA3, proximal third-order arteriole; dA3, distal third-order arteriole; CR-treated, conventional resuscitation; PR-treated, peritoneal resuscitation; Max, maximum dilation response to SNP. Data presented as percentage of Max. CR from hemorrhagic shock caused impaired endothelial-dependent vasodilation. *P < .01 by two-way ANOVA followed by Tukey posttest.