Distal protection filter
First Claim
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1. A system for providing embolic protection, the system comprising:
- a first sheath having a longitudinal axis, a proximal end, a distal end and a lumen, the lumen configured to receive a guidewire;
a first distal protection filter attached to a distal portion of the first sheath, the first distal protection filter comprising a self-expanding frame with a slidable crossover point that defines a proximal loop and a distal loop, and a filter element attached to one of the proximal loop or distal loop of the self-expanding frame of the first distal protection filter, wherein the filter element extends to the crossover point;
a second sheath disposed about the longitudinal axis and having a proximal end, a distal end and a lumen, the second sheath disposed over the first sheath, wherein the distal end of the second sheath is located proximally the first distal protection filter;
a second distal protection filter attached to a distal portion of the second sheath, the second distal protection filter comprising a self-expanding frame with a slidable crossover point that defines a proximal loop and a distal loop, and a filter element attached to the proximal loop of the self-expanding frame of the second distal protection filter, wherein the crossover point is proximal to the filter element, wherein the proximal loops and the distal loops each includes a proximal end and a distal end; and
an outer sheath disposed over both the first sheath and the second sheath; and
wherein when deployed, the proximal loops, the distal loops, and the slidable crossover points of the first distal protection filter and the second distal protection filter are substantially positioned on a same side of a plane within which the longitudinal axis of the first sheath extends,wherein when deployed, the proximal ends of the proximal loops and the distal ends of the distal loops are substantially near the longitudinal axis, the distal ends of the proximal loops and the proximal ends of the distal loops at the crossover points are substantially away from the longitudinal axis.
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Abstract
Embodiments of the invention relate generally to devices and methods for providing filtration of debris within a body lumen. More particularly, embodiments of the invention related to devices and methods for providing distal protection to a medical procedure by filtration of debris generated by the medical procedure using filters having a frame with a slidable crossover point.
153 Citations
38 Claims
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1. A system for providing embolic protection, the system comprising:
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a first sheath having a longitudinal axis, a proximal end, a distal end and a lumen, the lumen configured to receive a guidewire; a first distal protection filter attached to a distal portion of the first sheath, the first distal protection filter comprising a self-expanding frame with a slidable crossover point that defines a proximal loop and a distal loop, and a filter element attached to one of the proximal loop or distal loop of the self-expanding frame of the first distal protection filter, wherein the filter element extends to the crossover point; a second sheath disposed about the longitudinal axis and having a proximal end, a distal end and a lumen, the second sheath disposed over the first sheath, wherein the distal end of the second sheath is located proximally the first distal protection filter; a second distal protection filter attached to a distal portion of the second sheath, the second distal protection filter comprising a self-expanding frame with a slidable crossover point that defines a proximal loop and a distal loop, and a filter element attached to the proximal loop of the self-expanding frame of the second distal protection filter, wherein the crossover point is proximal to the filter element, wherein the proximal loops and the distal loops each includes a proximal end and a distal end; and an outer sheath disposed over both the first sheath and the second sheath; and wherein when deployed, the proximal loops, the distal loops, and the slidable crossover points of the first distal protection filter and the second distal protection filter are substantially positioned on a same side of a plane within which the longitudinal axis of the first sheath extends, wherein when deployed, the proximal ends of the proximal loops and the distal ends of the distal loops are substantially near the longitudinal axis, the distal ends of the proximal loops and the proximal ends of the distal loops at the crossover points are substantially away from the longitudinal axis. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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Specification