Catheter systems and methods for crossing vascular occlusions
First Claim
1. A catheter system comprising:
- a catheter shaft including a braided tubular member, wherein at least one inner polymer liner couples to an inside surface of the braided tubular member, wherein at least one outer polymer laminate couples to an outside surface of the braided tubular member, wherein polymer materials of the outer polymer laminate are interspersed through the braided tubular member and connect into interstices of an outside surface of the inner polymer liner; and
at least one lumen in the catheter shaft.
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Accused Products
Abstract
Interventional catheter-based systems and methods are described herein for use in generating an initial pathway through vascular occlusions. The catheter systems generally include two elements. A first element is a Blunt Dissection Catheter including a manually actuated assembly located at the distal tip of the Blunt Dissection Catheter that performs blunt dissection in the vascular occlusion to produce a dissection track, or small pathway through the occlusion. The second element is a Sheath Catheter that serves as a conduit within which the Blunt Dissection Catheter is freely advanced, retracted and rotated. The first and second elements are used in some combination to cross vascular occlusions in both the coronary and peripheral vasculature.
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Citations
54 Claims
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1. A catheter system comprising:
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a catheter shaft including a braided tubular member, wherein at least one inner polymer liner couples to an inside surface of the braided tubular member, wherein at least one outer polymer laminate couples to an outside surface of the braided tubular member, wherein polymer materials of the outer polymer laminate are interspersed through the braided tubular member and connect into interstices of an outside surface of the inner polymer liner; and
at least one lumen in the catheter shaft. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A catheter system comprising:
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a catheter shaft including a braided tubular member, wherein at least one inner polymer liner couples to an inside surface of the braided tubular member, wherein at least one outer polymer laminate couples to an outside surface of the braided tubular member, wherein polymer materials of the outer polymer laminate are interspersed through the braided tubular member and connect into interstices of an outside surface of the inner polymer liner, wherein the inner polymer liner forms a lumen in the catheter shaft; and
an introducer including a member having a proximal end and a distal end and forming a single lumen configured to track over a guide wire, wherein the member is configured to be inserted into the catheter shaft, wherein a distal region of the member extends beyond a distal end of the catheter shaft when the member is fully inserted. - View Dependent Claims (20, 21, 22, 23, 24)
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25. A catheter system comprising:
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a sheath catheter comprising a catheter shaft with at least one lumen and terminating to form an annular opening at a distal end of the catheter shaft; and
an intravascular tissue expanding catheter comprising, a catheter including a distal end and a longitudinal axis having at least one conduit extending along the longitudinal axis;
a housing formed at the distal end of the catheter shaft wherein the housing includes at least one deflecting member defined by a proximal end pivotally coupled to the catheter shaft and a free distal tip that moves through an arc away from the longitudinal axis of the shaft to expand vascular tissue, wherein the at least one deflecting member includes an integrally formed hinge; and
an actuation assembly positioned along the catheter shaft to move the distal tip of at least one deflecting member away from the longitudinal axis of the catheter shaft. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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43. A method of crossing an occlusion, comprising:
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assembling a catheter system by loading a blunt dissection catheter into a sheath catheter;
advancing the catheter system to a vascular site and positioning at least one spreading member of the blunt dissection catheter adjacent to the occlusion;
applying a fracturing force to tissue of the blood vessel and the occlusion by moving a distal end of the at least one spreading member laterally away from a longitudinal center line of the blunt dissection catheter by deflecting a distal end of the spreading member around a proximal end of the spreading member in response to a spreading force;
disrupting material of the occlusion and generating a path through the disrupted material in response to the applied fracturing force; and
advancing at least one of the blunt dissection catheter and the sheath catheter through material of the occlusion using the generated path so that at least one of the blunt dissection catheter and the sheath catheter crosses through the material of the occlusion and the material of the occlusion remains external to the catheter system. - View Dependent Claims (44, 45, 46, 47, 48)
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49. A method of crossing an occlusion, comprising:
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advancing a first guide wire within a blood vessel of vasculature to the occlusion;
assembling a catheter system by loading a sheath introducer into a sheath catheter;
advancing the catheter system over the first guide wire so that a distal end of the system is in proximity to the occlusion;
removing the first guide wire and sheath introducer from the vasculature;
advancing a blunt dissection catheter through the sheath catheter to position at least one spreading member of the blunt dissection catheter adjacent to the occlusion;
applying a fracturing force to tissue of the blood vessel and the occlusion by moving a distal end of the spreading member laterally away from a longitudinal center line of the blunt dissection catheter by deflecting a distal end of the spreading member around a proximal end of the spreading member in response to a spreading force;
disrupting material of the occlusion and generating a path through the disrupted material in response to the applied fracturing force; and
advancing at least one of the blunt dissection catheter and the sheath catheter through material of the occlusion using the generated path so that at least one of the blunt dissection catheter and the sheath catheter crosses through the material of the occlusion and the material of the occlusion remains external to the catheter system. - View Dependent Claims (50, 51, 52, 53, 54)
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Specification