title: Needle-knife papillotomy and fistulotomy improved the treatment outcome of patients with difficult biliary cannulation.
abstract: Needle-knife papillotomy and fistulotomy (NKPF) is a new, modified technique designed for difficult biliary cannulation. The safety and efficacy of performing NKPF based on characteristics of main duodenal papilla (MDP) was evaluated.
  
  
  
  We performed a retrospective review of consecutive patients with intact papilla who were established as candidates for therapeutic ERCP at tertiary referral center. A total of 532 patients were included in conventional endoscopic retrograde cholangiopancreatography (ERCP) group in which repeated cannulation was tried in patients with difficult bile duct cannulation; and 598 patients enrolled in early NKPF group according to predefined parameters. Based on the characteristics of MDP, different types of NKPF were performed. The endoscopic data (mean procedure time, anatomy of the main papilla), rate of cannulation success, and post-ERCP complications were collected.
  
  
  
  A total of 82 patients underwent NKPF. The mean procedure time of the small papilla group was longer than bulging papilla group (P < 0.05). The success rate of biliary cannulation in the small papilla group (69.3 %) was lower than in the bulging papilla group (100 %, P < 0.01). The overall successful biliary cannulation of patients in the NKPF group was significantly higher than in the conventional group (98.8 vs 90.8 %, P > 0.05). The total complication rate was 6.6 % among conventional group patients and 5.7 % among NKPF group, respectively. The overall complication rate and rates of specific complications (pancreatitis, bleeding, cholangitis, and perforation) in the two groups were similar (P > 0.05).
  
  
  
  Early NKPF based on characteristics of MDP raised the success rate of biliary cannulation when conventional cannulation failed and did not increase the complication rate post-ERCP. Clinic Trials. gov number, Hongwei-1102-12.
authors.affiliation: Digestive Endoscopy Center, Department of Gastroenterology and Hepatology, Branch of Shanghai First People's Hospital, Jiaotong University, Shanghai, China. zhangqish1@163.com.
authors.forename: Qi-Sheng
authors.initials: QS
authors.lastname: Zhang
authors.affiliation: Digestive Endoscopy Center, Department of Gastroenterology and Hepatology, Branch of Shanghai First People's Hospital, Jiaotong University, Shanghai, China.
authors.forename: Bing
authors.initials: B
authors.lastname: Han
authors.affiliation: Digestive Endoscopy Center, Department of Gastroenterology and Hepatology, Branch of Shanghai First People's Hospital, Jiaotong University, Shanghai, China.
authors.forename: Jian-Hua
authors.initials: JH
authors.lastname: Xu
authors.affiliation: Digestive Endoscopy Center, Department of Gastroenterology and Hepatology, Branch of Shanghai First People's Hospital, Jiaotong University, Shanghai, China.
authors.forename: Peng
authors.initials: P
authors.lastname: Gao
authors.affiliation: Digestive Endoscopy Center, Department of Gastroenterology and Hepatology, Branch of Shanghai First People's Hospital, Jiaotong University, Shanghai, China.
authors.forename: Yu-Cui
authors.initials: YC
authors.lastname: Shen
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002404:Catheterization / Q000009:adverse effects / Q000295:instrumentation / Q000379:methods; D002760:Cholangiopancreatography, Endoscopic Retrograde / Q000009:adverse effects / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D017063:Outcome Assessment, Health Care; D011183:Postoperative Complications / Q000453:epidemiology / Q000209:etiology / Q000517:prevention & control; D012189:Retrospective Studies; D016717:Sphincterotomy, Endoscopic / Q000009:adverse effects / Q000295:instrumentation / Q000379:methods*
keywords: Complications; Endoscopic retrograde cholangiopancreatography; Fistulotomy; Papillotomy