Method of forming medical devices: intravascular occlusion devices
First Claim
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1. A method of protecting a patient from embolization during a percutaneous procedure at a site of stenosis within a vessel, comprising:
- providing a guidewire having proximal and distal ends, a proximal and a distal region, and an expandable filter associated with the distal region, the filter being expandable from a collapsed delivery configuration to an expanded deployed configuration;
providing a retrieval catheter having proximal and distal ends and a lumen sized to receive the guidewire;
introducing the distal end of the guidewire into the patient'"'"'s vessel with the filter in the collapsed delivery configuration;
advancing the filter downstream of the stenosis, wherein the guidewire and expandable filter cross the stenosis;
expanding the expandable filter;
advancing a treatment catheter over the guidewire to position the treatment catheter at the site of stenosis within the vessel;
urging the stenosis radially outwardly against a wall of the vessel wherein embolic material is generated and captured before the expandable filter is removed from the patient'"'"'s vessel;
removing the treatment catheter from the vessel;
after the treatment catheter has been removed introducing the distal end of the retrieval catheter into the vessel; and
advancing the retrieval catheter over the guidewire to retrieve the filter.
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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.
30 Citations
5 Claims
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1. A method of protecting a patient from embolization during a percutaneous procedure at a site of stenosis within a vessel, comprising:
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providing a guidewire having proximal and distal ends, a proximal and a distal region, and an expandable filter associated with the distal region, the filter being expandable from a collapsed delivery configuration to an expanded deployed configuration;
providing a retrieval catheter having proximal and distal ends and a lumen sized to receive the guidewire;
introducing the distal end of the guidewire into the patient'"'"'s vessel with the filter in the collapsed delivery configuration;
advancing the filter downstream of the stenosis, wherein the guidewire and expandable filter cross the stenosis;
expanding the expandable filter;
advancing a treatment catheter over the guidewire to position the treatment catheter at the site of stenosis within the vessel;
urging the stenosis radially outwardly against a wall of the vessel wherein embolic material is generated and captured before the expandable filter is removed from the patient'"'"'s vessel;
removing the treatment catheter from the vessel;
after the treatment catheter has been removed introducing the distal end of the retrieval catheter into the vessel; and
advancing the retrieval catheter over the guidewire to retrieve the filter. - View Dependent Claims (2, 3, 4, 5)
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Specification