Objectives: Advanced ERCP techniques (AETs) for difficult biliary stones include peroral cholangioscopy (POC) with electrohydraulic/laser lithotripsy (EHL/LL), endoscopic papillary large balloon dilation (EPLBD) and mechanical lithotripsy (ML). We assess the efficacy of AETs.
Methods: A retrospective query for AETs.
Primary Outcome: Complete duct clearance. Secondary outcome: Complete duct clearance by technique. Statistical Analysis version 9.3 (SAS Inc., Cary, NC).
Results: From 1/00 to 10/12, 349 patients were identified of which 222 (80% had prior ERCPs) had AETs. 211 with sufficient follow-up underwent 295 ERCPs; 280 of which were AET's. Index AETs: POC with EHL/LL (n = 46/211, 22%), ML (n = 84/211, 40%), EPLBD with mean balloon size of 11.5 ± 1.7 mm (n = 39/211, 18%) and combination AETs (n = 42/211, 20%). Stone characteristics: 76% had ≥1 stone, 81% extrahepatic and 32% had strictures. Number of stones (mean 2.5 and range 1-20) did not differ among groups. EPLBD had higher percentage (95%) of extrahepatic stones (p = .0003). The 'Combination' and 'POC' groups had larger stones (mean 17.7 mm ±6.4 and 16.8 mm ±6.1, respectively; p < .001). Complete clearance: 209/211 (99%) at index AET 167/211 (79%) or after mean of 2.5 ± 0.7 AETs in 42/211 (20%). Partial clearance: 2/211 (1%). Clearance at index AETs was higher with EPLBD (90%, p = .014). Adverse Events: 7/280 (2.5%).
Conclusions: AETs achieved clearance in 99%. EPLBD had higher clearance at index AET likely owing to higher extrahepatic stones. Larger stones, but not number, were associated with increased combination AETs and total ERCPs.
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