Patent ID: 8029494

Claim:
A method of removing an obstruction in the biliary duct, comprising the steps of: providing a coaxial catheter device comprising an inner catheter having a proximal end and a distal end wherein at least two or more lumens are formed between the proximal end and distal end of the inner catheter; providing an outer catheter having a proximal end and a distal end and an opening wherein the inner catheter is coaxially engaged through the opening of the outer catheter thereby forming a coaxial space between the inner catheter and the outer catheter; inserting a wire guide through a natural opening into the duct and delivering a distal end of the coaxial catheter device through the natural opening distal to the natural opening and into the duct using at least one of the two or more lumens of the coaxial catheter device; positioning a balloon of the coaxial catheter device distal to the obstruction within the duct; infusing a fluid into at least one of the two or more lumens of the coaxial catheter device for inflating the balloon; and infusing a fluid into the coaxial space of the coaxial catheter device and out of an exit port of the outer catheter while the balloon is inflated, the exit port positioned proximal to the balloon, to produce a hydraulic force for the removal of an obstruction within the biliary duct out through the natural opening.