Method and device for filtering body fluid
First Claim
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1. A method for filtering emboli from blood flowing through a body vessel during therapeutic treatment at a treatment site in the vessel comprising:
- providing a guidewire having distal and proximal ends and carrying a filter on a distal portion of the guidewire, the filter being expandable from a collapsed delivery configuration to an expanded deployed configuration;
providing an elongate introduction member and an elongate retrieval member, each having distal and proximal ends and a lumen sized to receive the guidewire;
introducing the introduction member into the vessel;
advancing the guidewire through the vessel while the filter is contained within the lumen of the introduction member in its collapsed delivery configuration;
expanding the filter to its expanded deployed configuration at a location within the vessel distal to the treatment site;
removing the introduction member from the vessel;
after the introduction member has been removed introducing the distal end of a treatment catheter into the vessel;
advancing the treatment catheter over the guidewire to the treatment site;
performing a therapeutic treatment at the treatment site with the treatment catheter;
filtering emboli released into blood during the therapeutic treatment with the filter;
removing the treatment catheter from the vessel;
after the treatment catheter has been removed introducing the distal end of the retrieval member into the vessel;
advancing the retrieval member over the guidewire to retrieve the filter; and
removing the retrieval member, guidewire and filter from the vessel.
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Abstract
Medical devices for filtering fluids flowing through a lumen and a method of forming medical devices. The devices can be used in vascular channels, urinary tracts, biliary ducts and the like, and filter emboli and other debris generated at a treatment site.
226 Citations
19 Claims
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1. A method for filtering emboli from blood flowing through a body vessel during therapeutic treatment at a treatment site in the vessel comprising:
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providing a guidewire having distal and proximal ends and carrying a filter on a distal portion of the guidewire, the filter being expandable from a collapsed delivery configuration to an expanded deployed configuration; providing an elongate introduction member and an elongate retrieval member, each having distal and proximal ends and a lumen sized to receive the guidewire; introducing the introduction member into the vessel; advancing the guidewire through the vessel while the filter is contained within the lumen of the introduction member in its collapsed delivery configuration; expanding the filter to its expanded deployed configuration at a location within the vessel distal to the treatment site; removing the introduction member from the vessel; after the introduction member has been removed introducing the distal end of a treatment catheter into the vessel; advancing the treatment catheter over the guidewire to the treatment site; performing a therapeutic treatment at the treatment site with the treatment catheter; filtering emboli released into blood during the therapeutic treatment with the filter; removing the treatment catheter from the vessel; after the treatment catheter has been removed introducing the distal end of the retrieval member into the vessel; advancing the retrieval member over the guidewire to retrieve the filter; and removing the retrieval member, guidewire and filter from the vessel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification