Fig. 3From: Hemoglobin Vesicles prolong the time to circulatory collapse in rats during apneaA Kaplan-Meier curve for the apnea time to a pulse pressure less than 20 mmHg for each group. There was a statistically significant difference between the groups assessed by a log-rank test (Air vs. HbV P = 0.004; Oxy vs. HbV, P = 0.003; NS vs. HbV, P = 0.045)Back to article page