Catheter balloon with biased multiple wings
AssigneeAdvanced Cardiovascular Systems, Inc.
InventorsHenri A. Gaudoin, Philip C. Foreman, Tri-Phuoc V. Le
Life of this patent
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Abstract
A balloon catheter for dilating a stenotic region of a patient's body lumen such as an artery or for the implantation of an expandable stent within a patient's body lumen. The balloon of the catheter has a plurality of canted wings which are inclined at an angle of about 15° to about 75°, preferably about 30° to about 60° from a line tangent to an inner tubular member extending within the interior of the balloon.
Claims14
A balloon catheter comprising:
- a) an elongated shaft having proximal and distal ends, a port in the distal end, an inner tubular member defining at least in part a guidewire lumen extending to and in fluid communication with the port in the distal end and an inflation lumen extending to a location spaced proximal to the distal end;
- and
- b) an inflatable deflated balloon on a distal portion of the elongated shaft having an interior in fluid communication with the inflation lumen forming a plurality of canted wings, each of which are formed so as to be inclined at an angle of about 15° to about 75° from lines tangent to the inner member extending therethrough.
A method of forming a low profile balloon formed of relatively noncompliant polymeric material having a plurality of wings canted at an angle comprising:
- a) providing a balloon having a cylindrical working section and tapered ends which define an interior chamber within the balloon and an elongated tubular inner member extending within the interior chamber of the balloon;
- b) inflating the balloon to a pressure of less than 20 psi;
- c) pressing a plurality of shaping surfaces against the exterior of the inflated balloon so as to form a plurality of wings inclined at angles of about 15° to about 75° from a line extending tangent to the inner tubular member;
- d) subjecting the interior chamber of the balloon to a partial vacuum of about 10 to about 29 inches of Hg;
- and
- e) wrapping the wings about an inner member.
A method of mounting a cylindrically shaped stent onto cylindrically shaped balloon on a stent delivery catheter, comprising:
- a) providing a stent delivery catheter having proximal and distal portions and a balloon on the distal portion having a cylindrical working section and tapered ends which define an interior chamber within the balloon and an elongated inner member extending within the interior chamber of the balloon;
- b) inflating the balloon to a relatively low pressure;
- c) pressing a plurality of shaping surfaces against the exterior of the partially inflated balloon so as to form a plurality of wings angled about 15° to about 75° from a line extending tangent to the exterior of the inner member;
- and
- d) reducing the pressure within the interior chamber of the balloon to a vacuum of about 10 to about 29 inches of Hg so as to maintain the balloon wings in the desired inclined position;
- e) wrapping the wings about the balloon in the same directions as the wings are inclined;
- f) mounting a stent about the wrapped balloon;
- and
- g) crimping the stent onto the wrapped balloon.
A stent delivery system comprising:
- a) a catheter with
- an elongated shaft having proximal and distal ends, a port in the distal end, an inner tubular member defining at least in part a guidewire lumen extending to and in fluid communication with the port in the distal end and an inflation lumen extending to a location spaced proximal to the distal end, and
- an inflatable deflated balloon on a distal portion of the elongated shaft having an interior in fluid communication with the inflation lumen forming a plurality of canted wings, each of which are formed so as to be inclined at an angle of about 15° to about 75° from lines tangent to the inner member extending therethrough;
- and
- b) an expandable stent mounted on the exterior of the balloon.
Dependencies are inferred from the claim text.