Guided filter with support wire and methods of use
DCFirst Claim
1. A method for deploying a percutaneous medical instrument, comprising the steps of:
- providing a guidewire and a support wire, the support wire having a distal region, a wire guide mounted on the distal region, and an expandable filter mounted on the distal region;
advancing the guidewire into a region of interest within a vessel;
advancing the support wire along the guidewire with the wire guide of the support wire engaging the guidewire;
expanding the filter downstream of the region of interest; and
advancing the percutaneous medical instrument over the support wire and positioning the medical instrument within the region of interest.
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Abstract
A guided filter system for temporary placement of a filter in an artery or vein is disclosed. The system includes a guidewire slideable through a wire guide included in a distal region of a support wire. The support wire has an expandable filter, which is operable between a collapsed or enlarged condition. A variety of endovascular devices, including angioplasty, atherectomy, and stent-deployment catheters, are insertable over the guidewire and/or the support wire. Methods of using the guided filter system to direct and exchange endovascular devices to a region of interest, and to entrap and remove embolic material from the vessel are also disclosed.
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Citations
31 Claims
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1. A method for deploying a percutaneous medical instrument, comprising the steps of:
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providing a guidewire and a support wire, the support wire having a distal region, a wire guide mounted on the distal region, and an expandable filter mounted on the distal region; advancing the guidewire into a region of interest within a vessel; advancing the support wire along the guidewire with the wire guide of the support wire engaging the guidewire; expanding the filter downstream of the region of interest; and advancing the percutaneous medical instrument over the support wire and positioning the medical instrument within the region of interest. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 29, 30)
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19. A percutaneous filter system, comprising:
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a guidewire; a support wire having a proximal end, a distal end, and a distal region, the support wire adapted to receive a percutaneous medical instrument; an expandable filter mounted on the distal region of the support wire; and a wire guide mounted on the distal region of the support wire and slideably engaging the guidewire, wherein, during use, the guidewire is positioned in a vessel at a region of interest, and the support wire is advanced along the guidewire until the filter reaches the region of interest. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28)
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31. A percutaneous filter system, comprising:
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a guidewire; a support wire having a proximal end, a distal end, a distal region, and an expandable filter mounted on the distal region of the support wire, the support wire adapted to receive a percutaneous medical instrument; and a sheath which removeably covers the support wire and filter, the sheath having a proximal end, a distal end, and a distal region, the distal region having a lumen which receives the filter and an aperture adapted to pass the guidewire, wherein, during use, the guidewire is positioned in a vessel at a region of interest, the sheath carrying the support wire is advanced along the guidewire until the filter reaches the region of interest, and the sheath is withdrawn to expose the filter.
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Specification