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.
