Evaluation and prognostic value of Cv-aCO2/Da-vO2 in patients with septic shock receiving fluid resuscitation Cv-aCO2/Ca-vO2.

The present study aimed to evaluate the prognostic value of venous-arterial CO2 to arterial-venous O2 (Cv-aCO2/Da-vO2) for patients with septic shock treated by fluid resuscitation. A total of 108 cases who received fluid resuscitation for septic shock at the Intensive Care Unit were retrospectively screened according to the 2012 surviving sepsis campaign guidelines. Patients were divided into 2 groups according to the Cv-aCO2/Da-vO2 ratio at 6 h after fluid resuscitation: Group A, Cv-aCO2/Da-vO2 >1; group B, Cv-aCO2/Da-vO2 ≤1. The resuscitation target rate and transfused resuscitation volume at 6 h exhibited no significant difference between the 2 groups. The cardiac output at 6 and 24 h, as well as the ratio of patients who reached the target of resuscitation within 24 h, the 24-h lactic acid clearance rate and the number of cases with central venous oxygen saturation >70% were significantly decreased in group A compared with those in group B (all P<0.05). The Sequential Organ Failure Assessment score at day 3 in group A was higher compared with that in group B (7.94±1.6 vs. 6.82±1.9; P=0.0013). The mortality rate at day 7 and 35 was higher in group A compared with that in group B (29/52 vs. 6/56, P<0.001; 48/52 vs. 36/56; P<0.001). In conclusion, the Cv-aCO2/Da-vO2 was able to effectively evaluate the success rate of resuscitation and, regarding prognosis, it was able to identify patients at high risk of adverse outcomes.