Dilatation Catheter with Enhanced Distal End for Crossing Occluded Lesions
First Claim
1. A catheter, the catheter comprisinga first shaft;
- a balloon, the balloon having a deflated state and an inflated state, the balloon comprising;
a distal section, the distal section being substantially cylindrically shaped when the balloon is in the deflated state and when the balloon is in the inflated state, the distal section being engaged to the first shaft;
a distal transition section, the distal transition section being a truncated cone when the balloon is in the deflated state and when the balloon is in the inflated state; and
at least one rib, each rib comprising a first portion and a second portion, the first portion being engaged to the distal section of the balloon and the second portion being engaged to the distal transition section of the balloon.
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Accused Products
Abstract
A catheter for crossing an occluding lesion with an inflatable balloon and dilating the lesion includes an inner tube that defines a longitudinal axis. The balloon includes a distal section that is bonded to the tube'"'"'s distal end, a working section, and a conically shaped distal transition section connecting the working and distal section. A plurality of rigid ribs are spaced around the circumference of the balloon near the catheter'"'"'s distal end. Each rib includes a first elongated portion attached to the balloon'"'"'s distal section and aligned substantially parallel with the longitudinal axis. A second portion extending from the first portion and at an angle thereto is attached to and lies along the surface of the balloon'"'"'s distal transition section. The plurality of ribs combine to simulate a stiff, tapered surface that can be wedged into the occluding lesion to create a passageway to cross the lesion with the balloon.
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Citations
16 Claims
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1. A catheter, the catheter comprising
a first shaft; a balloon, the balloon having a deflated state and an inflated state, the balloon comprising; a distal section, the distal section being substantially cylindrically shaped when the balloon is in the deflated state and when the balloon is in the inflated state, the distal section being engaged to the first shaft; a distal transition section, the distal transition section being a truncated cone when the balloon is in the deflated state and when the balloon is in the inflated state; and at least one rib, each rib comprising a first portion and a second portion, the first portion being engaged to the distal section of the balloon and the second portion being engaged to the distal transition section of the balloon. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
Specification