Wilson-cook Medical Incorporated

Cook Medical Technologies LLC

Kulwinder S Dua

Scott T Moore

John A Karpiel

David M Hardin, Jr

Greg J Skerven

Pushkar S Mukewar

Kenneth J Fearn

A method of removing an obstruction in the biliary duct including 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. The method includes 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 wherein at least one of the two or more lumens is configured for receiving a fluid for inflating a balloon, at least one of the first lumen and the second lumen is configured for receiving a wire guide and the coaxial space is configured for receiving a flushing fluid for the removal of an obstruction within the biliary duct.

Method of removing biliary stones with coaxial catheter device

Disclosed is a pressure sensitive prosthesis ( ) that includes a tubular member ( ) having a passageway ( ) extending therethrough and a sleeve ( ) attached about one end of the tubular member. The sleeve functions as a one-way valve to permit fluid flowing through the sleeve lumen ( ) in a first direction ( ) and under a first pressure, while collapsing in response to fluid flowing in a second direction where the pressure that exceeds that of the first direction or pressure. One aspect of the invention includes an esophageal anti-reflux expandable prosthesis wherein the sleeve is adapted to invert back through the tubular stent frame to permit belching or vomiting (fluid or materials under a third, significantly higher pressure). Another aspect of the invention includes a tubular drainage stent ( ), such as a biliary or urethral stent in which the sleeve opens to permit passage of fluids, then collapses to prevent retrograde flow.

Prosthesis having a sleeve valve

An esophageal prosthesis (,) for preventing reflux of gastric fluids through the esophagus. The esophageal prosthesis process includes a tubular frame (,) with a sleeve (,) disposed around and longitudinally along the tubular frame as well as extending from the distal end (,) of the frame. The lower portion (,) of the sleeve has a readily collapsible lumen (,) that forms a one-way valve for preventing the reflux of gastric fluids in an antegrade manner through the esophagus. Fluids however readily flow through the sleeve in a antegrade direction. In response to a pressure build up in the stomach of a patient wanting to belch or vomit, the lower portion of the sleeve inverts through the passage (,) of the tubular frame, thereby relieving the pressure build up or voiding the patient's stomach. The tubular frame includes a plurality (,) of self-expanding zig-zag wire stents (,, and,) that maintain the patency of the esophagus and, in particular, the lower esophageal sphincter and any tumor that is causing stricture of the esophagus.

Anti-reflux esophageal prosthesis

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Brookfield, WI, United States of America

Kulwinder S Dua