Balloon catheter with non-deployable stent having improved stability
First Claim
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1. A catheter comprising:
- a catheter body;
a balloon coupled to the catheter body;
a helical scoring structure disposed over the balloon, the helical scoring structure comprising;
a proximal end coupled to the catheter body;
a distal end coupled to the catheter body;
a plurality of helical elements that longitudinally extend from the proximal end to the distal end; and
a plurality of S-shaped stabilizing struts, wherein each S-shaped stabilizing strut is disposed between and coupled to at least two adjacent helical elements,wherein the helical scoring structure is configured to radially expand in response to inflating the balloon,wherein at least one of the proximal end and the distal end moves axially as the helical scoring structure shortens to accommodate for radial expansion of the helical scoring structure during expansion of the balloon.
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Abstract
An angioplasty catheter comprises a catheter body having a balloon or other radially expandable shell at its distal end. An external structure is carried over the shell and scores a stenosed region in a blood vessel when the balloon is inflated therein. The catheter has an attachment structure disposed between the catheter body and the balloon to accommodate foreshortening and rotation of the external structure as the balloon is expanded. The external structure may be part of a helical cage structure which floats over the balloon. Stabilizing struts are provided between at least some of the helical struts.
404 Citations
11 Claims
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1. A catheter comprising:
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a catheter body; a balloon coupled to the catheter body; a helical scoring structure disposed over the balloon, the helical scoring structure comprising; a proximal end coupled to the catheter body; a distal end coupled to the catheter body; a plurality of helical elements that longitudinally extend from the proximal end to the distal end; and a plurality of S-shaped stabilizing struts, wherein each S-shaped stabilizing strut is disposed between and coupled to at least two adjacent helical elements, wherein the helical scoring structure is configured to radially expand in response to inflating the balloon, wherein at least one of the proximal end and the distal end moves axially as the helical scoring structure shortens to accommodate for radial expansion of the helical scoring structure during expansion of the balloon. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification