Balloon dilation catheter with hypotube
First Claim
1. A dilation catheter comprising:
- a body tube having distal and proximal ends and having a guide wire port adjacent said distal end;
a relatively stiff, metallic hypotube in said body tube having a proximal end and having an open distal end adjacent said guide wire port, said body tube and hypotube collectively forming inner and outer nested fluid flow passages;
a dilation balloon fixed to said distal end at a position distally of said guide wire port and in fluid communication with the inner and outer nested fluid flow passages to facilitate inflation of said dilation balloon; and
a connection fixture at the proximal ends of said body tube and hypotube for flowing fluid through said inner and outer flow passages simultaneously.
1 Assignment
0 Petitions
Accused Products
Abstract
A balloon dilation catheter includes a distal monorail section, to which a balloon is secured, and a catheter body tube including a monorail section. A guide tube extends through the balloon and has a proximal end sealed to a guide wire port in the body tube. A guide wire extends along the body tube and through the guide tube. To stiffen the body tube while maintaining maximized fluid flow area, a stainless steel hypotube extends through the proximal body tube, has a distal opening positioned adjacent the guide wire port and a solid reinforcing tapered distal end section that extends across the guide port. The hypotube can be fixed or removable. Alternatively, the hypotube divides the interior of the proximal body tube section into two separate flow passages to enable positive purging.
154 Citations
6 Claims
-
1. A dilation catheter comprising:
-
a body tube having distal and proximal ends and having a guide wire port adjacent said distal end; a relatively stiff, metallic hypotube in said body tube having a proximal end and having an open distal end adjacent said guide wire port, said body tube and hypotube collectively forming inner and outer nested fluid flow passages; a dilation balloon fixed to said distal end at a position distally of said guide wire port and in fluid communication with the inner and outer nested fluid flow passages to facilitate inflation of said dilation balloon; and a connection fixture at the proximal ends of said body tube and hypotube for flowing fluid through said inner and outer flow passages simultaneously. - View Dependent Claims (2, 3, 4, 5, 6)
-
Specification