To access interaction between variables the conditions NF, NBP, and PH were modeled in a factorial analysis of variance. The unpaired Student’s t test was used to analyse comparisons between two groups. A p < 0.05 AZD7762 was considered statistically significant. Results Mean animal weights in each group were 304 ± 20.4 g (Sham), 298 ± 27 g (NF), 302 ± 22.0 g (NBP), and 292 ± 40 g (PH); (p > 0.05). The amount of anesthetics used was similar between the groups (ketamine 108.5 mg/Kg ± 10.2 to 122± 35 mg/Kg; xylazine 19.3 ± 3.6 mg/Kg to 20.5 ± 7.4 mg/Kg). The total mortality rate in the study was 34%, approximately

50% of the deaths occurred within the first 15 minutes after the aortic injury. There were no statistical differences in mortality between the three different resuscitation regimens, all animals that died were replaced to maintain n=6 animals per group; there were no deaths among sham operated animals. Fluid infusion and hemodynamic response Normotensive resuscitated animals received significantly more intravenous LR during resuscitation than PH animals (7.21 ± 3.24 ml/100g vs. 2.45 ± 1.05 ml/100g; p < 0.0001). Fluid infusion in sham operated animals and NF group were negligible. Baseline MAP were similar among the animals; average 92.6 ± 5.8 mmHg (p > 0.05). Aortic learn more injury lead to uncontrolled bleeding and a significant reduction in MAP by 5 minutes in all hemorrhage

groups compared to baseline selleck screening library levels and sham operated animals (Figure 1). The MAP in the normotensive resuscitated

animals (NBP group) was successfully restored to baseline and sham operated animals in approximately 30 minutes after the beginning of the bleeding (71.9 ± 5.2 mmHg; p > 0.05). However, the MAP in the NF group and PH resuscitated animals remained significantly lower than NBP and sham groups, as well as baseline, until the end of the experiment (54.3 ± 1.5 mmHg and 61.1± 1.2 mmHg; p < 0.0001) respectively (Figure 1). The cardiac output Methamphetamine and the cardiac index reduced significantly in all hemorrhage groups compared to baseline levels and sham operated animals. However, there was no statistical difference between the hemorrhage groups and the resuscitation regimen used (Figures 2A and 2B). Normotensive resuscitated animals (NBP group) presented significantly higher intra-abdominal blood loss (18.8 ± 3.5 ml/Kg) compared to the NF group (14.9 ± 3.2 ml/Kg), and the PH group (16.2 ± 3.9 ml/Kg); p < 0.05 (Figure 3). Figure 2 Cardiac performance and resuscitation strategy. Cardiac Output (Figure 2A) and Cardiac Index (Figure 2B) after hemorrhage and resuscitation. * p < 0.05 NF, NBP, and PH vs. baseline and sham groups; no statistically significant difference between NBP vs. PH (p > 0.05). NF = No Fluid; NBP = Normal Blood Pressure; PH = Permissive Hypotension. Figure 3 Intraabdominal blood loss. * p < 0.05 NBP vs. all other groups. NF = No Fluid; NBP = Normal Blood Pressure; PH = Permissive Hypotension.