Clinical audit to determine efficacy of daily infusion of low dose of 20% albumin in combination with antibiotics in patients with spontaneous bacterial peritonitis

Aim of the study
The recommended high dose albumin treatment for spontaneous bacterial peritonitis (SBP) is not possible in the Indian setting due to financial constraints. Aim of the study was the retrospective audit to determine the outcome of patients with SBP on combination treatment of low dose albumin and appropriate antibiotics.

Material and methods
Patients undergoing abdominal paracentesis in the period 2016-2018 were included. Patient details including age, gender, co-morbidity profile, details of previous hospitalisation and antibiotics, MELD score, and ascitic fluid analysis were noted. Details of albumin use and antibiotics were retrieved. SBP was classified based on mode of acquisition of infection and severity risk based on laboratory parameters. Statistics – χ² test, Mann-Whitney U test, relative risk calculation. A p value of < 0.05 was considered as significant.

Results
24 (18.8%), 38 (29.7%) and 66 patients (51.5%) belonged to low, intermediate and high risk SBP groups, respectively. The median dose of albumin was 20 g/day for a median duration of 5 days (range 1-8). Between the 3 subgroups, there was no significant difference in the median age; the majority were men. Antibiotic escalation was necessary in intermediate and high risk cases (42.1% vs. 84.8%, p < 0.0001). The mortality rate in intermediate and high risk groups was 29% and 42%, respectively (p = 0.18). Between the 2 subgroups of intermediate risk, patients with serum bilirubin < 4 mg/dl and serum creatinine > 1 mg/dl were significantly older (54 vs. 49 years, p = 0.02), and had high mortality (40.7% vs. 0%). Cirrhosis-related complications (CRC; one or more in combinations) were more frequent in high risk and intermediate risk patients (p = 0.001) with a 7-8 times higher risk of mortality compared to those who had no CRC.

Conclusions
Our protocol is associated with high mortality in intermediate and high risk SBP patients. Presence of one or more CRC increases the risk of mortality several fold.