Higher Complications During the Waiting Period for Interval Cholecystectomy in Patients With Mild Biliary Pancreatitis

Background:Although current guidelines recommend cholecystectomy during the same admission in patients with mild acute biliary pancreatitis (ABP), it involves a waiting list most of the time. We aimed to assess the risk of complications and determine predictors during the waiting period for cholecystectomy after the first episode of ABP. Methods:A prospective observational study was conducted in patients with mild ABP. Follow-ups were done by phone calls or using electronic health records for a maximum of 6 months after discharge or until cholecystectomy. Results:A total of 194 patients were included in the study. Although all patients were referred to surgeons, only 81 (41.8%) underwent cholecystectomy within 6 months after discharge. During the observation period, gallstone-related biliary events (GRBEs) developed in 68 (35.1%) patients, which included biliary colic, recurrent ABP, acute cholecystitis, choledocholithiasis, gallbladder perforation, cholangitis, and liver abscess. The overall readmission rate was 25.2%, with 44.8% occurred within 4 weeks after discharge. The odds ratio of any complication was 1.58 (95% CI, 1.42 to 1.76, P=0.028) and 1.59 (95% CI, 1.42 to 1.78, P=0.009) in the patients who did not have surgery within 2 to 7 days and 8 to 15 days, respectively. A 4-fold increased risk of readmission was detected (95% CI, 1.16 to 13.70, P=0.019) if cholecystectomy was not performed within 31 to 90 days. The patients who developed complications had significantly higher C-reactive protein at admission, longer waiting time, and had 3 or more gallstones on imaging. Conclusions:Interval cholecystectomy was associated with a high risk of complications during the waiting period in patients with mild ABP.