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 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 introduction catheter having distal and proximal ends and a lumen sized to receive the guidewire;
providing a retrieval catheter having distal and proximal ends and a lumen sized to receive the guidewire;
introducing the introduction catheter into the vessel;
advancing the guidewire through the vessel while the filter is contained within the lumen of the introduction catheter 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 catheter from the vessel;
filtering emboli from blood with the filter;
after the introduction catheter has been removed introducing the distal end of the retrieval catheter into the vessel;
advancing the retrieval catheter over the guidewire to retrieve the filter; and
removing the retrieval catheter, 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.
119 Citations
2 Claims
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1. A method for filtering emboli from blood flowing through a body 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 introduction catheter having distal and proximal ends and a lumen sized to receive the guidewire;
providing a retrieval catheter having distal and proximal ends and a lumen sized to receive the guidewire;
introducing the introduction catheter into the vessel;
advancing the guidewire through the vessel while the filter is contained within the lumen of the introduction catheter 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 catheter from the vessel;
filtering emboli from blood with the filter;
after the introduction catheter has been removed introducing the distal end of the retrieval catheter into the vessel;
advancing the retrieval catheter over the guidewire to retrieve the filter; and
removing the retrieval catheter, guidewire and filter from the vessel. - View Dependent Claims (2)
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Specification