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Publication Number
US-10596347-B2
Publication Date
2020-03-24
Expiration Date
Abstract
A large lumen guide catheter (10) has an elongate tubular body (22), which has an outer surface (24), an inner surface (44), and a braided wire layer between the inner surface and the outer surface, wherein the wires winding a first helical direction are thicker and wider than the wire winding in a second helical direction opposite the first helical direction.
Core Innovation
The invention relates to a guide catheter that includes an elongate tubular body having a limited outer diameter and a limited inner diameter, and a sole reinforcement tubular structure embedded in polymer between the outer diameter and the inner diameter from a proximal end to proximal to the distal end. The sole reinforcement tubular structure is made solely of a first plurality of elongate wire members and a second plurality of elongate wire members braided together in a braid configuration.
The first plurality of elongate wire members is arranged in a counterclockwise helix, and the second plurality of elongate wire members is arranged in a clockwise helix about a central longitudinal axis. Each plurality has a constant transverse cross-sectional shape with different maximum width and maximum thickness relationships, and the wire members are braided in a 2-over, 2-under braid configuration.
The braid reinforcement is defined by a constant braid pics per inch (ppi) between 65 and 75 ppi. The detailed constructions described include polymer-embedded braid reinforcement in a multi-layer elongate tubular body, with optional lubricious inner liner materials, and a braidless distal tip.
Claims Coverage
The independent claim defines a guide catheter by strict dimensional limits for the elongate tubular body and a single embedded polymer-reinforced braid formed solely from two pluralities of helically arranged wire members with opposite helix directions and different constant transverse cross-sectional geometries, braided in a 2-over, 2-under configuration with a constant braid pics per inch (ppi) in the range of 65 to 75.
Dimensional limits for the elongate tubular body
An elongate tubular body having an outer diameter of no more than 0.0835 inches (2.1209 mm) and an inner diameter of no less than 0.0715 inches (1.8161 mm), with a proximal end, a distal end, and a total length therebetween.
Sole polymer-embedded braided reinforcement tubular structure
A sole reinforcement tubular structure embedded in polymer between the outer diameter and the inner diameter of the elongate tubular body from the proximal end to proximal to the distal end, the sole reinforcement tubular structure made solely of a first plurality of elongate wire members and a second plurality of elongate wire members braided together in a braid configuration.
Opposite helix directions with distinct constant transverse cross-sectional geometry
First plurality arranged in a counterclockwise helix about a central longitudinal axis with a first constant transverse cross-sectional shape having a maximum thickness and a maximum width, where the maximum width is at least three times as great as the maximum thickness and no more than four and a half times as great as the maximum thickness, and second plurality arranged in a clockwise helix with a second constant transverse cross-sectional shape having a maximum thickness and a maximum width, where the maximum width is at least two times as great as the maximum thickness and no more than three times as great as the maximum thickness.
2-over, 2-under braid configuration with constant ppi
The braid configuration is 2-over, 2-under and a braid pics per inch (ppi) is constant and is a value between 65 and 75 ppi.
Overall, the claim coverage centers on a small-OD, large-ID guide catheter reinforced by a single polymer-embedded braided tubular structure formed solely from two opposing helical wire pluralities that differ in constant transverse cross-sectional geometry, braided in a 2-over/2-under pattern with constant pics per inch within 65 to 75.
Stated Advantages
Improved backup force.
Higher torque before kinking.
Reduced distal whip.
Smaller kink radius, providing better kink resistance.
Documented Applications
Used as a large-lumen guide catheter, including comparisons to prior-art LAUNCHER™ guide catheters.
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