title: Guidewire versus conventional contrast cannulation of the common bile duct for the prevention of post-ERCP pancreatitis: a systematic review and meta-analysis.
abstract: BACKGROUND
  The use of a guidewire (GW) for cannulation of the bile duct during ERCP may prevent post-ERCP pancreatitis (PEP).
  
  
  OBJECTIVE
  A systematic review and meta-analysis of GW-guided versus conventional contrast (CC)-guided bile duct cannulation for the prevention PEP.
  
  
  METHODS
  A November 2008 search of gray literature, databases, reference lists, and meeting abstracts was conducted for randomized, controlled trials comparing GW and CC. Two independent reviewers extracted the data. The outcomes included PEP, primary cannulation success, and other adverse events.
  
  
  RESULTS
  From 2132 citations, 7 randomized, controlled trials (5 noncrossover trials and 2 crossover trials) were included. Among noncrossover trials only, there was significant reduction in PEP when using a GW (3.2%) compared with CC (8.7%) (relative risk [RR] 0.38; 95% CI, 0.19-0.76). Subgroup analysis showed a significantly lower occurrence of PEP after GW entry versus CC injection of the pancreatic duct (1.1% vs 9.5%; RR 0.19; 95% CI, 0.06-0.58). Among patients with a precut sphincterotomy from a failed primary cannulation, there was less PEP with GW cannulation compared with CC (2.4% vs 21.7%; RR 0.21; 95% CI, 0.04-1.04). The other adverse event rates were comparable between GW and CC groups (2% vs 2%; RR 1.05; 95% CI, 0.39-2.83). Primary cannulation success was significantly greater with GW use compared with CC (89% vs 78%; RR 1.19; 95% CI, 1.05-1.35).
  
  
  CONCLUSIONS
  ERCP GW cannulation reduces the risk of PEP compared with the use of CC. GW cannulation is associated with a higher cannulation success rate and less PEP after pancreatic duct entry.
authors: Division of Gastroenterology, Department of Medicine, University of Alberta, Edmonton, Alberta, Canada.
authors: Justin
authors: J
authors: Cheung
authors: Kelvin K
authors: KK
authors: Tsoi
authors: Wai-Leong
authors: WL
authors: Quan
authors: James Y W
authors: JY
authors: Lau
authors: Joseph J Y
authors: JJ
authors: Sung
mesh_terms: D000368:Aged; D002404:Catheterization / Q000379:methods*; D002760:Cholangiopancreatography, Endoscopic Retrograde / Q000009:adverse effects* / Q000295:instrumentation / Q000379:methods*; D003135:Common Bile Duct; D003287:Contrast Media / Q000008:administration & dosage; D005260:Female; D006801:Humans; D008875:Middle Aged; D010195:Pancreatitis / Q000209:etiology / Q000517:prevention & control*
chemical_list: D003287:Contrast Media