eng Oriental Scientific Publishing Company Biomedical and Pharmacology Journal 0974-6242 2015-04-28 6 2 259 264 10.13005/bpj/412 2714 article Vadod Norouzi 1 Ali Mohammadian 1 Behzad Eskandaroghli 2 Department of Anesthesiology, Ardabil University of Medical Science, Ardabil, Iran. Department of Neurosurgery, Ardabil University of Medical Science, Ardabil, Iran. The present study aimed to determine the relationship between initial and 24 h base deficit after the patient rehabilitation in critically ill inpatients in the surgical ICU to determine the prognosis of patients. 96 patients hospitalized in the surgical ICU during 6 months were enrolled regardless of the reason for admission. The statistical correlation between initial and 24 h base deficit and the patients’ outcome were examined. The raw data were analyzed using descriptive and analytical statistical methods by SPSS. Various statistical tests such as T-test, Chi-Square and Roc curve were used. The results with P-value less than 0.05 were statistically considered valid. The initial and 24 h base deficit of patients with death outcome was significantly higher than those with discharge outcome (P<0.001). The initial arterial pH had no statistically significant correlation with patients’ outcome (p=0.46). In contrast, the 24 h arterial pH was associated with outcome (p= 0.066). There was a poor correlation between arterial blood pressure at admission and patients’ outcome (p=0.06). The values of initial and 24h base deficit with the most predictor ability of patients’ outcome were -11.35 and -4.6. Accordingly, the deficit of initial base up to -11.35 has been associated with mortality rate of 19.7%. Values less than -11.35 has been associated with mortality rate of 65.4% (p=0.001). Furthermore, the 24 h base deficit up to -4.6 has been associated with mortality rate of 15.2%. Values less than -4.6 has been associated with mortality rate of 61.5% (p<0.001). The increased levels of initial and 24 h base deficit have a strong correlation with the outcome of critically ill patients. Therefore, it can be used in determining the prognosis of critically ill patients. https://biomedpharmajournal.org/vol6no2/the-initial-and-24-h-after-the-patient-rehabilitation-deficit-of-arterial-blood-gases-as-predictors-of-patients-outcome/ Base Deficit Outcome the Intensive Care