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  • Title: Pancreatic sphincterotomy versus needle knife precut in difficult biliary cannulation.
    Author: Halttunen J, Keränen I, Udd M, Kylänpää L.
    Journal: Surg Endosc; 2009 Apr; 23(4):745-9. PubMed ID: 18649101.
    Abstract:
    BACKGROUND: In endoscopic retrograde cholangiopancreaticography (ERCP) difficult cannulation is an independent risk factor for complications. METHODS: Altogether 6,209 ERCPs were performed in Helsinki University Central Hospital in the period 1996-2006. In 558 cases (9%) without a previous sphincterotomy, direct access into the biliary duct could not be achieved. In this group access was attempted by first performing a pancreatic sphincterotomy in 351 difficult cannulation cases (63%). A needle knife precut without a pancreatic sphincterotomy was performed in 178 cases (32%). All the necessary clinical and laboratory information was available for 262 of the 351 patients who had undergone a pancreatic sphincterotomy and for 157 of the 178 patients who had been subjected to needle knife precutting, and these data were further evaluated in this study. RESULTS: The pancreatic sphincterotomy technique was successful in 255 cases (97.3%). Post-ERCP pancreatitis developed in 8.8% of the pancreatic sphincterotomy group. In 147 patients, biliary cannulation was successful following a pancreatic sphincterotomy, and the post-ERCP pancreatitis rate for those patients was 9.3%. In 108 patients, a needle knife papillotomy, in addition to a pancreatic sphincterotomy, was necessary and resulted in a post-ERCP pancreatitis rate of 8.2%. In the needle knife precut group only, post-ERCP pancreatitis developed in 5.1% of cases. Biliary cannulation succeeded less frequently following needle knife precutting than following the pancreatic sphincterotomy technique (71.3% versus 97.3%, p<0.001). There was no significant difference in the post-ERCP pancreatitis rate between the precut and pancreatic sphincterotomy techniques (p=0.16). CONCLUSIONS: In difficult cannulation, a pancreatic sphincterotomy to achieve deep biliary duct cannulation can be performed with a high success rate (failure rate less than 3%). The corresponding success rate using the needle knife precut technique is 71%. In both methods the risk for post-ERCP pancreatitis is comparable to that of a standard biliary sphincterotomy.
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