Self furling umbrella frame for carotid filter
First Claim
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1. A medical device for capturing embolic or foreign material in a body vessel, comprising:
- an elongate wire having a proximal end and a distal end; and
a filter device associated with the elongate wire, the filter device having an expanded position and a contracted position and including a support frame made from at least one structural member having a proximal end and a distal end, the structural member having a helical configuration when the filter device is placed in the contracted position, wherein the structural member defines a first portion and second portion of the filter device, at least one of the first portion or second portion having a substantially straight configuration when placed in the expanded position.
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Abstract
A capture device for removal of clots and foreign bodies from vasculature or filtering of particulate from blood flow. The parachute-like capture device is connected to an elongate wire located within a longitudinally elongated tubular member. The invention provides a capture device that is radially expandable and a method for refolding the capture device into a reduced profile during contraction. Thereby, providing an atraumatic retraction of the capture device from within the vasculature.
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Citations
29 Claims
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1. A medical device for capturing embolic or foreign material in a body vessel, comprising:
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an elongate wire having a proximal end and a distal end; and a filter device associated with the elongate wire, the filter device having an expanded position and a contracted position and including a support frame made from at least one structural member having a proximal end and a distal end, the structural member having a helical configuration when the filter device is placed in the contracted position, wherein the structural member defines a first portion and second portion of the filter device, at least one of the first portion or second portion having a substantially straight configuration when placed in the expanded position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A medical device for capturing embolic or foreign material in a vessel, comprising:
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an elongate tubular member having a proximal end, a distal end and an internal lumen; a filter device storable within the lumen of the elongate tubular member, the filter device including a plurality of structural members forming a support frame, the filter device having an expanded position and a contracted position when placed within the lumen of the elongate tubular member, the structural members forming the support frame assuming a helical configuration in the contracted position and being self-expandable into the expanded position when the filter device is advanced out of the lumen of the elongate tubular member, wherein the structural members define a first portion and second portion of the filter device, at least one of the first portion or second portion having a substantially straight configuration when placed in the expanded position. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A method for capturing emboli material or other particulates in a body vessel, comprising:
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providing a medical device including (a) an elongate tubular member having a proximal end, a distal end and an internal lumen and (b) a filter device including a support frame having a plurality of structural members which expand radially from a contracted position, the filter device including a capturing structure attached to the support frame, the structural members forming the support frame assuming a helical configuration in the contracted position and being self-expandable into the expanded position when the filter device is advanced out of the lumen of the elongate tubular member, wherein the structural members define a first portion and second portion of the filter device, at least one of the first portion or second portion having a substantially straight configuration when placed in the expanded position; placing the filter device into the lumen of the elongate member; advancing the elongate tubular member into a body vessel; moving the filter device out of the lumen of the tubular member; and capturing embolic material or other particulate in the body vessel in the capturing structure. - View Dependent Claims (27, 28, 29)
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Specification