Disclosed is a continuous loop drainage system. The continuous loop drainage system uses a double-lumen catheter to augment drainage of a body fluid, such as bile or urine, in a prograde direction through a closed-loop system. A miniature extracorporeal pump in the closed loop receives the fluid through an inflow lumen of the catheter and generates pressure in an outflow lumen of the catheter to cause flow of the fluid in a prograde direction distally through the outflow lumen toward the distal end of the catheter, such as the duodenum in the case of a biliary catheter or the urinary bladder in the case of a ureteral catheter. Other example uses are possible, such as in augmenting flow of cerebrospinal fluid through a ventriculoperitoneal shunt, for example.

A biliary drain system includes a drain having a first end and a second end. The drain also includes a lumen that connects the first end to the second end. The system also includes a balloon mounted to the drain and configured to mount within a stricture of a bile duct of a patient. The balloon includes a first end, a second end, and a center portion. A size of the first end of the balloon is greater than a size of the center portion of the balloon.

A biliary drainage device for negative pressure-retrograde installation of percutaneous transhepatic biliary drainage (NR-PTBD) according to the present disclosure is in a pancreaticoduodenectomy process, the biliary drainage device including a flexible tube having a suction port formed at one side end and mounted on an afferent loop in order to suck bile; and a guide member installed at the other end of the tube so that the tube inserted through a cut part of a biliary tract can penetrate a liver tissue.