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Successful removal of impacted large bile duct stones using electrohydraulic lithotripsy with an ultraslim endoscope after Billroth II gastrectomy
09 May 2019 (online)
The diagnostic and therapeutic effectiveness of combined double-balloon endoscopy (DBE) using a short endoscope and peroral direct cholangioscopy with an ultraslim endoscope for altered gastrointestinal anatomy has been demonstrated     . This method offers the following advantages over mother–baby cholangioscopy for bile duct stone treatment: single-operator use, wide working channel, favourable cost performance, and high image resolution. We treated impacted large bile duct stones using electrohydraulic lithotripsy (EHL) and an ultraslim endoscope in a patient who had undergone Billroth II gastrectomy.
A 75-year-old man was referred to our hospital for treatment of bile duct stones. He had undergone Billroth II gastrectomy for gastric cancer. Complete stone removal at the previous hospital was difficult, and a plastic stent had been placed. Abdominal computed tomography showed large stones stuck in the bile duct (largest stone diameter, 25 mm) ([Fig. 1]). We therefore planned to use EHL to crush the stones ([Video 1]).
Video 1 Successful removal of impacted large bile duct stones using electrohydraulic lithotripsy using an ultraslim endoscope in a patient with Billroth II gastrectomy.
First, we advanced a short DBE scope (EI-580B; working length 1550 mm; Fujifilm, Tokyo, Japan) to the papilla and dilated the papilla using a 15-mm balloon catheter. Then, we lifted the scope loop, and straightened it. The DBE scope was then exchanged for an ultraslim endoscope (EG-L580NW7; outer diameter 5.8 mm; working channel 2.4 mm; Fujifilm), leaving the overtube in place with balloon inflation   . The ultraslim endoscope was advanced to the papilla and inserted directly into the bile duct. We performed EHL for stone removal with manual water injection from the working channel and/or using an endoscopic water pipe system ([Fig. 2]). After crushing the stone sufficiently, we completely removed the stone fragments using a 5-Fr basket (Memory Basket; Cook, Osaka, Japan) and saline injection and the ultraslim endoscope ([Fig. 3], [Fig. 4], [Fig. 5]). The procedure time was 30 minutes and there were no adverse events.
This combined method was useful for the removal of large stones using EHL and achieved clear vision during the endoscopic procedure.
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