Objective：To investigate a minimally invasive therapeutic procedure for peripancreatic abscess with the combined use of interventional ultrasound and choledochoscopy.
Methods：The clinical data of 52 patients diagnosed as peripancreatic abscess, who underwent B-ultrasound guided percutaneous puncture and catheterized drainage, and subsequent irrigation and debridement by choledochoscopy after dilatation of the drainage catheter sinus tract, were retrospectively analzyed.
Results：Of the 52 patients, 50 cases were cured by this procedure,  the curative rate was 96.2%, and the other 2 cases were converted to open drainage due to the inadequate catheter drainage. The average time for cure of the 50 cases was 73 days, of whom 1 case developed an enterocutaneous fistula and 2 cases were complicated by abdominal hemorrhage, but all the 3 cases were all cured by nonsurgical treatment. No residual peripancreatic necrosis was noted in any patient at the follow-up period of 3 months to >1 year.
Conclusions：The combined use of interventional ultrasound and choledochoscopy is a safe and effective procedure for treatment of peripancreatic abscess, so it can be widely used.