Integral vascular filter system
First Claim
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1. A vascular filter system for insertion into a lumen of a vessel, said vascular filter system comprising:
- a) a guidewire having a distal end and a proximal end, a distal portion and a proximal portion, with said distal portion having a distal end, a midpoint and a proximal end;
b) a prescribed filter shape integral with and placed within said distal portion of said guidewire, said distal portion having a smaller first diameter for insertion into said lumen of said vessel, and a larger second diameter for expanding to substantially equal the diameter of said lumen and to be placed in generally sealing relationship with said lumen;
c) a porous covering having a distal end and a proximal end, with said distal end of said porous covering attached near said distal end of said distal portion of said guidewire, and said proximal end of said porous covering attached near said midpoint of said distal portion of said guidewire, and;
d) actuating means for causing said distal portion of said guidewire to move between said smaller first diameter, and said larger second diameter and said prescribed filter shape wherein said actuating means is a generally solid core wire.
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Abstract
A integral vascular filter system comprising a guidewire and an integral filter which can be used to capture embolic particulates during medical procedures, while allowing for continuous perfusion of blood, with minimal incremental blood flow turbulence. The vascular filter system addresses the clinical problem of minimizing profile or diameter, so as to enable or facilitate the crossing of a lesion or obstruction in the vessel, while also minimizing incremental blood flow turbulence which may result in thrombus formation.
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Citations
28 Claims
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1. A vascular filter system for insertion into a lumen of a vessel, said vascular filter system comprising:
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a) a guidewire having a distal end and a proximal end, a distal portion and a proximal portion, with said distal portion having a distal end, a midpoint and a proximal end;
b) a prescribed filter shape integral with and placed within said distal portion of said guidewire, said distal portion having a smaller first diameter for insertion into said lumen of said vessel, and a larger second diameter for expanding to substantially equal the diameter of said lumen and to be placed in generally sealing relationship with said lumen;
c) a porous covering having a distal end and a proximal end, with said distal end of said porous covering attached near said distal end of said distal portion of said guidewire, and said proximal end of said porous covering attached near said midpoint of said distal portion of said guidewire, and;
d) actuating means for causing said distal portion of said guidewire to move between said smaller first diameter, and said larger second diameter and said prescribed filter shape wherein said actuating means is a generally solid core wire. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A vascular filter system for insertion into a lumen of a vessel, said vascular filter system comprising:
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a) a guidewire having a distal end and a proximal end, a distal portion and a proximal portion, with said distal portion having a distal end, a midpoint and a proximal end;
b) a prescribed filter shape integral with and placed within said distal portion of said guidewire, said distal portion having a smaller first diameter for insertion into said lumen of said vessel, and a larger second diameter for expanding to substantially equal the diameter of said lumen and to be placed in generally sealing relationship with said lumen;
c) a porous covering having a distal end and a proximal end with said distal end of said porous covering attached near said distal end of said distal portion of said guidewire, and said proximal end of said porous covering attached near said midpoint of said distal portion of said guidewire, and;
d) actuating means for causing said distal portion of said guidewire to move between said smaller first diameter, and said larger second diameter and said prescribed filter shaped; and
wherein said actuating means is a generally solid core wire having a proximal end and a distal end. - View Dependent Claims (26)
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27. A method for capturing embolic particulates within the lumen of a vessel during a medical procedure, while allowing for continuous perfusion of blood, comprising the steps of:
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a) providing a guidewire comprising a distal portion and a proximal portion, with said distal portion having a distal end, a midpoint and a proximal end;
a prescribed filter shape in said distal portion of said guidewire, said distal portion of said guidewire having a smaller first diameter for insertion into a vessel, and a second larger diameter for expanding to substantially equal the diameter of said lumen and to be placed in generally sealing relationship with said lumen;
a porous covering having a distal end and proximal end, with said distal end of said porous covering integral with and placed within near said distal end of said distal portion of said guidewire, and said proximal end of said porous covering attached near said midpoint of said distal portion of said guidewire; and
actuating means for causing said distal portion of said guidewire to move between said smaller first diameter, and said larger second diameter and prescribed filter shape wherein said actuating means a generally solid core wire;
b) inserting said guidewire into said lumen of said vessel until said distal portion of said guidewire is positioned past an occlusion in said vessel;
c) employing said actuating means to cause said distal portion of said guidewire to achieve said larger second diameter and said prescribed shape;
d) advancing additional devices over said guidewire, and positioning said devices at the site of said occlusion in said vessel;
e) performing additional procedures to therapeutically treat said occlusion in said vessel;
f) capturing embolic particulates generated by said procedures, in said porous covering on said distal portion of said guidewire;
g) removing said additional devices from said guidewire;
h) employing said actuating means to cause said distal portion of said guidewire to achieve said smaller first diameter;
i) removing said guidewire from said lumen of said vessel, with said embolic particulates captured in said porous covering.
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28. A vascular filter comprising:
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a) a guidewire having an outer diameter, a distal portion and proximal portion, with said distal portion having a distal end, a midpoint and proximal end;
b) a filter placed integral with and placed within said distal portion of said guidewire, said filter distal portion having a shape with smaller first diameter for insertion into said lumen of said vessel, and a larger second diameter placed in generally sealing relationship with a body lumen;
c) a porous covering having a distal end and a proximal end, with said distal end of said porous covering attached near said distal end of said distal portion of said guidewire; and
d) actuating means for causing said distal portion of said guidewire to move between said smaller first diameter and said larger second diameter wherein said actuating means is a generally solid core wire.
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Specification