Pancreatitis Clinical Trial
Official title:
A Prospective Randomised Study on the Patency Period of the Plastic Anti-reflux Biliary Stent
The aim of this study is to determine the average patency period of the new anti-reflux biliary stent on patients with malignant bile duct strictures and to determine if this stent remains patent for a longer period of time comparing with the ordinary plastic Tannenbaum biliary stent.
Bile duct related cancer is a condition quite commonly seen among Asians. Predisposing
conditions for primary bile duct cancer include recurrent infections and autoimmune diseases
such as recurrent pyogenic cholangitis (RPC) and primary sclerosing cholangitis (PSC) as
well as congenital problem such as choledochal cyst. Peri-ampullary tumour, pancreatic
tumour and metastatic tumours with bile duct compression are other causes of bile duct
obstruction. As many of these tumours are discovered at a late stage, curative treatment is
usually not feasible. Palliative endoscopic stenting of the obstructed biliary system
remains the treatment of choice for the majority.
The main problem with endoscopic stenting of the biliary system is the short stent patency
period. There are some reports on modifications to plastic biliary stenting method in recent
years including changes in stent designs, use of a different material or coating,
administrating prophylactic antibiotics and the use of special drugs. All these have failed
to show any conclusive effect on the stent patency period.
A preliminary study has demonstrated some promising results in the use of a stent with an
anti-reflux property very similar to the stents the investigators are using in this study.
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