Patent ID: 7069634

Claim:
A method of manufacturing a catheter comprising the steps of: a) forming a first tubular portion of a relatively impermeable material, the first tubular portion formed having a lumen; b) forming a second tubular portion of a porous material; c) partially disposing the second tubular portion within the lumen so that a portion of the first tubular portion overlaps the second tubular portion; d) adjusting the length of the second tubular portion to conform to the dimensions of a selected site in an organism, comprising the steps of: i) heating the first tubular portion until the diameter of the lumen increases in diameter a sufficient amount to enable relative sliding movement between the first tubular portion and the second tubular portion; ii) sliding the second tubular portion in the lumen relative to the first tubular portion to provide a preselected length of the second tubular portion that extends distally beyond the distal end of the first tubular portion; and iii) cooling the first tubular portion until the first tubular portion and the second tubular portion are no longer capable of relative sliding movement; and e) establishing a near zero tolerance fit between the second tubular portion and the portion of the first tubular portion that overlaps the second tubular portion.