Direct peroral cholangioscopy using an ultraslim upper endoscope for management of residual stones after mechanical lithotripsy for retained common bile duct stones
submitted 19. Dezember 2012
accepted after revision 12. April 2012
12.Juli 2012 (eFirst)
Background and study aims: The incidence of residual stones after mechanical lithotripsy for retained common bile duct (CBD) stones is relatively high. Peroral cholangioscopy using a mother – baby system may be useful for confirming complete extraction of stones, but has several limitations regarding routine use. We evaluated the role of direct peroral cholangioscopy (DPOC) using an ultraslim upper endoscope for the evaluation and removal of residual CBD stones after mechanical lithotripsy.
Patients and methods: From August 2006 to November 2010, 48 patients who had undergone mechanical lithotripsy for retained CBD stones with no evidence of filling defects in balloon cholangiography were recruited. The bile duct was inspected by DPOC after balloon cholangiography. Detected residual CBD stones were directly retrieved with a basket or balloon catheter under DPOC. The incidence of residual stones detected by DPOC, and the success rate of residual stone retrieval under DPOC were investigated.
Results: DPOC was successfully performed in 46 of the 48 patients (95.8 %). Of these, 13 patients (28.3 %) had residual CBD stones (mean number 1.4, range 1 – 3; mean diameter 4.5 mm, range 2.3 – 9.6). The residual stones were removed directly under DPOC in 11 of these patients (84.6 %). There were no complications associated with DPOC or stone removal.
Conclusion: DPOC using an ultraslim upper endoscope is a useful endoscopic procedure for the evaluation and extraction of residual stones after mechanical lithotripsy for retained CBD stones.
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