Perfusion dilation catheter system and methods of use
First Claim
1. A perfusion dilatation catheter system comprising:
- a resilient tubular frame having a plurality of longitudinal struts defined by a plurality of slots, the frame being heat set in a radially expanded configuration and being adapted to be constrained in a radially compressed configuration; and
an inflatable dilatation balloon helically wrapped around the frame struts,wherein each longitudinal strut extends from a first location proximal of the helically wrapped balloon to a second location distal of the helically wrapped balloon, andwherein adjacent windings of the helically wrapped balloon are in contact with each other when the balloon is in an inflated configuration and a lumen is defined by an interior surface of the balloon when the frame is in the radially expanded configuration.
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Accused Products
Abstract
A system includes an elongate catheter having a self-expanding frame disposed at the distal end of the catheter. The frame includes a plurality of longitudinal struts defined by parallel slots. The frame may be constrained into a radially compressed configuration for delivery to a treatment site. A helical balloon is mounted about the frame. Upon release from the constraining mechanism, the frame returns to a heat-set radially expanded configuration to initiate dilation of a treatment site in a patient. Inflating the balloon around the expanded frame further expands the initial radial dilation of the site. Proximal and distal ends of the slots are unobstructed by the balloon to permit flow of a fluid through the slots and through a lumen defined by an interior surface of the balloon when the frame is in the radially expanded configuration.
21 Citations
13 Claims
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1. A perfusion dilatation catheter system comprising:
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a resilient tubular frame having a plurality of longitudinal struts defined by a plurality of slots, the frame being heat set in a radially expanded configuration and being adapted to be constrained in a radially compressed configuration; and an inflatable dilatation balloon helically wrapped around the frame struts, wherein each longitudinal strut extends from a first location proximal of the helically wrapped balloon to a second location distal of the helically wrapped balloon, and wherein adjacent windings of the helically wrapped balloon are in contact with each other when the balloon is in an inflated configuration and a lumen is defined by an interior surface of the balloon when the frame is in the radially expanded configuration. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of radially expanding a site in a vessel of a patient comprising the steps of:
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delivering a guidewire to the site; delivering a system over the guidewire, the system including, a radially self-expanding frame constrained in a radially compressed configuration, the frame having a plurality of longitudinal struts with slots disposed between the struts, and an inflatable helical dilating balloon fixedly mounted about the frame; expanding the frame from the radially compressed configuration to a radially expanded configuration, wherein each of the longitudinal struts extends from a first location proximal of the balloon to a second location distal of the balloon such that the system is configured to permit fluid flow through the frame and through a perfusion lumen defined by an inner surface of the balloon when the frame is in the radially expanded configuration; and inflating the balloon. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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Specification