Magnetic compression anastomosis for biliary obstruction after partial hepatectomy
Magnetic compression anastomosis (MCA) is a revolutionary method of performing choledochocholedochostomy without surgery in patients with biliary obstruction      . Herein, we report the successful treatment, using MCA, of a case of complete biliary obstruction after partial hepatectomy.
A 64-year-old man who had undergone right partial hepatectomy for a metastatic liver tumor from rectal cancer was admitted to another hospital with bile leakage. Although the bile leakage was treated by endoscopic nasobiliary drainage, there was prolonged liver dysfunction, and computed tomography showed dilatation of the right-posterior intrahepatic bile duct ( [Fig. 1] ). Endoscopic retrograde cholangiopancreatography and percutaneous transhepatic biliary drainage (PTBD) were attempted but recanalization was not possible ( [Fig. 2] ). Therefore, the patient was referred to our hospital.
Fig. 1 Dilatation of the right-posterior intrahepatic bile (arrows) seen at computed tomography (CT).
Fig. 2 Endoscopic retrograde cholangiopancreatography and percutaneous transhepatic biliary drainage were attempted but recanalization was not possible.
Initially, an 18-Fr PTBD catheter was placed. A cylindrical neodymium magnet, 5 mm in diameter, was pushed to the tip of the PTBD catheter and inserted in the intrahepatic bile duct using biopsy forceps ( [Video 1] ). Next, another magnet, 3 mm in diameter, was inserted up to the tip of the inner part of the outer sheath of the guidewire (VisiGlide 2; Olympus, Tokyo, Japan) for delivery ( [Fig. 3] ). Then, the outer sheath with the magnet was inserted via the papilla and the magnet was pushed out using biopsy forceps. The magnets were advanced to sites immediately before and after the obstruction. Then, the two magnets were positioned so that they attracted each other ( [Fig. 4] , [Video 1] ). A plastic stent was placed via the transpapillary route in the left bile duct to prevent magnet migration. Recanalization was achieved 7 days after the procedure and the magnets were endoscopically removed using basket forceps, without adverse events ( [Fig. 5] , [Video 1] ). The created fistula was dilated using a 10-Fr biliary dilation catheter over the guidewire. Finally, a fully covered self-expandable metal stent (BonaStent M-intraductal; Standard Sci Tech, Seoul, South Korea) was placed in the right bile duct across the fistula ( [Video 1] ).
Video 1 Magnetic compression anastomosis for biliary obstruction following partial hepatectomy, after failure of recanalization by means of endoscopic retrograde cholangiopancreatography and percutaneous transhepatic biliary drainage.
Fig. 3 A magnet was inserted up to the tip of the lumen of the outer sheath of the guidewire for delivery.
Fig. 4 The two magnets attracted each other.
Fig. 5 Recanalization was achieved (main figure) and the magnets were endoscopically removed (inset).
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1 Mimuro A, Tsuchida A, Yamanouchi E. et al. A novel technique of magnetic compression anastomosis for severe biliary stenosis. Gastrointest Endosc 2003; 58: 283-287
2 Itoi T, Yamanouchi E, Ikeda T. et al. Magnetic compression anastomosis: a novel technique for canalization of severe hilar bile duct strictures. Endoscopy 2005; 37: 1248-1251
3 Itoi T, Yamanouchi E, Ikeuchi N. et al. Magnetic compression duct-to-duct anastomosis for biliary obstruction in a patient with living donor liver transplantation. Gut Liver 2010; 4: 96-98
4 Itoi T, Kasuya K, Sofuni A. et al. Magnetic compression anastomosis for biliary obstruction: review and experience at Tokyo Medical University Hospital. J Hepatobiliary Pancreat Sci 2011; 18: 357-365
5 Jang SI, Kim JH, Won JY. et al. Magnetic compression anastomosis is useful in biliary anastomotic strictures after living donor liver transplantation. Gastrointest Endosc 2011; 74: 1040-1048
Kenjiro Yamamoto, MD
Department of Gastroenterology and Hepatology, Tokyo Medical University
6-7-1 Nishishinjuku, Shinjuku-ku
Tokyo 160-0023, Japan
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