DOUBLE TUBE, APPARATUS FOR PRODUCING DOUBLE TUBE, BALLOON CATHETER PRODUCED BY USING DOUBLE TUBE, AND PROCESS FOR PRODUCING BALLOON CATHETER

摘要

A double tube from which a balloon catheter having a high rigidity and a low fluid resistance can be easily produced by means of an extruder or the like, an apparatus for producing the double tube, a balloon catheter produced by using the double tube, and a process for producing the balloon catheter are provided. The double tube comprises an outer tube having a lumen extending from the far end to the proximal end, and an inner tube which is provided within the outer tube and has a lumen extending from the far end to the proximal end, wherein a long material in the strip form is provided as a connecting member which continuously connects the inner surface of the outer tube to the outer surface of the inner tube in the axial direction. A balloon catheter can be easily produced by using this double tube. An apparatus for producing a double tube is also provided which comprises a first extruding means for extruding a resin for forming an outer tube portion, a second extruding means for extruding a resin for forming an inner tube portion, and a die for forming tubes respectively from the extrudate from the first extruding means and the one from the second extruding means.