Catheter with low-friction distal segment

Details Catheter with low-friction distal segment Catheter with low-friction distal segment

A - Human Necessities

61

M

A61M 25/00 (2006.01) A61M 25/01 (2006.01)

Patent

CA 2057004

A catheter (12) for accessing a target site along a tortuous, small-vessel pathway. The catheter includes a flexible distal seg- ment (26) which is composed of a flexible polymer tube and a low-friction internal tubular surface. The surface allows the cathe- ter to be advanced over sharp bends and small-diameter loops in a guidewire (14), in advancing the catheter along a small-vessel pathway. Various embodiments of the catheter are disclosed wherein the internal tubular surface of a distal portion of the catheter include a variety of different constructions and are comprised of a variety of different materials so as to best avoid the jamming, sticking or locking of the distal end or any part of the guidewire against the surface. Braided sleeve-like constructions, surfaces embedded with a plurality of small particles and surfaces comprised of various anti-friction materials are used in order to obtain the object of the invention.

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