Abstract:Objective To evaluate the efficacy of pancreatic stent placement for predicted severe acute biliary pancreatitis (SABP). Methods Data of patients predicted as having SABP , who receive endoscopic retrograde cholangiopancreatography (ERCP) from January 1, 2017 to June 30, 2021 at Affiliated Hangzhou First People''s Hospital, School of Medicine, Westlake University were reviewed. Pancreatic stents were placed in 31 patients during ERCP (the observation group), and 31 other patients who received ERCP without pancreatic duct stents in the same period were included as the control group. Inflammation indices, liver function indices and serum amylase of the two groups 1 week and 2 weeks after the operation were compared. The clinical improvement (time for the serum amylase return to normal, relief time of abdominal pain, improvement time of peripancreatic effusion), length of hospital stay and cost, and prognosis (long-term complication incidence, incidence of endoscopic drainage or debridement) were compared. Results There were no significant differences in age, gender composition, preoperative severity score, liver function indices, inflammatory indices or time of first ERCP between the observation group and the control group (P>0.05). There were no significant differences in inflammatory indices, liver function indices or serum amylase between the two groups at 1 week and 2 weeks after receiving ERCP (P>0.05). The time for amylase to return to normal was 3.5 (1, 5) d and 5.0 (3, 6) d (Z=-2.20, P=0.028), the time for pain relief was 4.0 (2.5,7.0) d and 5.0 (4.0, 8.8) d (Z=-3.15,P=0.002), the improvement time for peripancreatic effusion was 25.3±1.5 d and 27.8±2.2 d (t=-0.84, P=0.407) , the hospital stay was 28 (19, 49) d and 40 (27, 70) d (Z=-2.03,P=0.043), and the total hospital cost was 81 (59,109) thousand yuan and 98 (69,173) thousand yuan (Z=2.02,P=0.043), respectively, in the observation group and the control group. The incidences of long-term complications in the observation group and the control group were 22.6% (7/31) and 54.8% (17/31) (χ2=6.80, P=0.009), respectively, and the incidences of endoscopic drainage or debridement were 16.1% (5/31) and 38.7% (12/31), respectively (χ2=3.97,P=0.046). Conclusion For patients with predicted severe acute biliary pancreatitis, endoscopic removal of biliary obstruction and placement of pancreatic stent to drain pancreatic juice to reduce pancreatic duct hypertension could accelerate the relief of patients'' clinical symptoms and improve their prognosis.