Patent ID: 8585676

Claim:
A balloon catheter, comprising: a multi-lumen lay-flat tube formed of: a first sheet of polymeric film material having a first edge; and a second sheet of polymeric film material having a first edge, the second sheet of polymeric film material being superimposed over and welded to the first sheet of polymeric film material by a first welded seam line joining the first edge of the first sheet of polymeric film material and the first edge of the second sheet of polymeric film material, a second welded seam line, and a third welded seam line, such that: a first tubular passage member is defined by the first welded seam line, the second welded seam line, a first portion of the first sheet of polymeric film material between the first welded seam line and the second welded seam line, and a first portion of the second sheet of the polymeric film material between the first welded seam line and the second welded seam line, wherein the first tubular passage member bounds a first lumen; and a central tube is defined by the second welded seam line, the third welded seam line, a second portion of the first sheet of polymeric film material between the second welded seam line and the third welded seam line, and a second portion of the second sheet of the polymeric film material between the second welded seam line and the third welded seam line, wherein the central tube is configured to be everted such that the first tubular passage member is interiorly disposed within the everted central tube; and an inflatable balloon secured to one end of the everted central tube, with said first lumen being in fluid communication with an interior volume of the inflatable balloon.