Methods for maintaining a filtering device within a lumen
First Claim
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1. A method of filtering blood flow in a vena cava, comprising:
- positioning a collapsed open loop filter support structure comprising a first end, a second end, and two opposing spiral support elements within the vena cava;
deploying the open loop filter support within the vena cava to position a portion of the filter support along the wall of the vena cava, wherein the two opposing spiral support elements cross over each other to form a crossover section between the first end and the second end;
filtering blood flow in the vena cava using a filter supported by the open loop filter support structure, the filter extending between the crossover section and at least one of the first end or the second end; and
moving the portion of the filter support relative to the wall of the vena cava to maintain the shape of the filter over a physiological range of the vena cava.
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Abstract
In one embodiment of the present invention there is provided a method of filtering blood flow in a lumen by positioning an open loop filter support structure within a lumen; maintaining a position of the open loop filter support structure within the lumen using radial force generated by the open loop filter support structure; and filtering blood flow in the lumen using a filter supported by the open loop filter support structure. In one aspect, there is also applying radial force generated by the open loop filter support structure along the axial dimension of the lumen.
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Citations
24 Claims
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1. A method of filtering blood flow in a vena cava, comprising:
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positioning a collapsed open loop filter support structure comprising a first end, a second end, and two opposing spiral support elements within the vena cava; deploying the open loop filter support within the vena cava to position a portion of the filter support along the wall of the vena cava, wherein the two opposing spiral support elements cross over each other to form a crossover section between the first end and the second end; filtering blood flow in the vena cava using a filter supported by the open loop filter support structure, the filter extending between the crossover section and at least one of the first end or the second end; and moving the portion of the filter support relative to the wall of the vena cava to maintain the shape of the filter over a physiological range of the vena cava. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of providing a filter across a flow path of a lumen, the lumen having a surface and a diameter, the method comprising:
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providing a filter support structure having a first end, a second end, two opposing spiral support elements, the two opposing spiral support elements crossing over each other to form a crossover section between the first end and the second end; and positioning the first end against a first portion of the lumen; and positioning the second end against a second portion of the lumen such that the first and the second ends are axially separated along the wall on one side of the lumen; positioning the crossover section against a portion of the lumen between the first and second ends and on a wall substantially opposite to the wall of the lumen supporting the ends; and using the filter support structure to provide a filter across the lumen flow path, the filter extending between the crossover section and at least one of the first end or the second end. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification