Method and device for filtering body fluid
First Claim
Patent Images
1. A device for filtering fluid flowing through a lumen defined by the wall of an anatomical structure comprising:
- a guidewire; and
a filter element mounted on the guidewire, the filter element having proximal and distal ends and being expandable from a collapsed configuration when the filter element is restrained to an expanded configuration when the filter element is unrestrained, the filter element having a shape in the expanded configuration which defines a cavity having a proximally facing opening, the guidewire extending to at least the distal end of the filter element.
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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.
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Citations
56 Claims
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1. A device for filtering fluid flowing through a lumen defined by the wall of an anatomical structure comprising:
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a guidewire; and
a filter element mounted on the guidewire, the filter element having proximal and distal ends and being expandable from a collapsed configuration when the filter element is restrained to an expanded configuration when the filter element is unrestrained, the filter element having a shape in the expanded configuration which defines a cavity having a proximally facing opening, the guidewire extending to at least the distal end of the filter element. - 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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20. A device for filtering fluid flowing through a lumen defined by the wall of an anatomical structure comprising:
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a filter element having proximal and distal ends and being expandable from a collapsed configuration when the filter element is restrained to an expanded configuration when the filter element is unrestrained, the filter element having a shape in the expanded configuration which defines a cavity having a proximally facing opening; and
means for carrying the filter element, the carrying means extending to at least the distal end of the filter element. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
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40. A method of filtering fluid flowing through a lumen defined by the wall of an anatomical structure comprising:
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providing a guidewire including a filter element mounted on a distal portion of the guidewire, the filter element having a distal end and being expandable from a collapsed configuration when the filter element is restrained to an expanded configuration when the filter element is unrestrained, the filter element having a shape in the expanded configuration which defines a cavity having a proximally facing opening, the guidewire extending to at least the distal end of the filter element;
introducing the guidewire into the lumen of the anatomical structure while the filter element is restrained in the collapsed configuration;
advancing the guidewire through the lumen until the filter element is positioned at a desired location;
removing the restraint on the filter element to expand the filter element to its expanded configuration;
filtering fluid flowing through the lumen into the opening in the cavity of the filter element;
closing the opening to the cavity of the filter element; and
removing the guidewire and filter element from the lumen of the anatomical structure. - View Dependent Claims (41, 42, 43, 44, 46, 47, 48, 49, 50)
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45. A method of filtering emboli from fluid flowing through a lumen defined by the wall of an anatomical structure comprising:
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providing a guidewire including a filter element mounted on a distal portion of the guidewire, the filter element having a distal end and being expandable from a collapsed configuration when the filter element is restrained to an expanded configuration when the filter element is unrestrained, the filter element having a shape in the expanded configuration which defines a cavity having a proximally facing opening, the guidewire extending to at least the distal end of the filter element;
introducing the guidewire into the lumen of the anatomical structure while the filter element is restrained in the collapsed configuration;
advancing the guidewire through the lumen until the filter element is positioned at a desired location;
removing the restraint on the filter element to expand the filter element to its expanded configuration;
filtering emboli from fluid flowing through the lumen into the opening in the cavity of the filter element;
collapsing the filter element about the emboli to capture the emboli in the cavity of the filter element; and
removing the guidewire and filter element from the lumen of the anatomical structure.
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51. A method of filtering fluid flowing through a lumen defined by the wall of an anatomical structure comprising:
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providing a filter device including a filter element and means for carrying the filter element, the filter element having a distal end and being expandable from a collapsed configuration when the filter element is restrained to an expanded configuration when the filter element is unrestrained, the filter element having a shape in the expanded configuration which defines a cavity having a proximally facing opening, the carrying means extending to at least the distal end of the filter element;
introducing the carrying means into the lumen of the anatomical structure while the filter element is restrained in the collapsed configuration;
advancing the carrying means into the lumen until the filter element is positioned at desired location;
removing the restraint on the filter element to expand the filter element to its expanded configuration;
filtering fluid flowing through the lumen into the opening in the cavity of the filter element;
closing the opening to the cavity of the filter element; and
removing the carrying means and filter element from the lumen of the anatomical structure. - View Dependent Claims (52, 53, 54, 55, 56)
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Specification