Catheter having improved proximal shaft design

Details Catheter having improved proximal shaft design Catheter having improved proximal shaft design

1998-10-23

2000-08-15

Buiz, Michael

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604 99, A61M 2900

Patent

active

061028908

ABSTRACT:
A catheter and subassemblies for catheters having improved proximal regions, and mid-regions including hypotube having distally increasing flexibility. One catheter has a kink resistant proximal shaft not including hypotube and including an outer tube disposed over a braid disposed over an inner tube. One catheter includes a proximal shaft having a 12-inch long strain relief disposed about a tubular region formed of hypotube. Another catheter includes a proximal hypotube shaft having a set curve imparted through bending and annealing, resulting in a catheter hypotube shaft having reduced spring and decreased kink radius. A catheter subassembly includes a hypotube shaft having a helical cut into the hypotube wall to increase flexibility over the length of the cut. One helical cut extends through the hypotube wall and includes a polymeric sleeve thereover to allow the cut hypotube to function as an inflation fluid delivery tube.

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