Releasable and retrievable vascular filter system
First Claim
1. A vascular filter system for insertion into a lumen of a vessel, said system comprising:
- a) a filter support structure comprising a proximal portion, a distal portion, and a plurality of struts extending therebetween, said struts further comprising proximal portions and distal portions, said filter having a smaller first diameter for insertion into said lumen, and a second larger diameter for expanding to a diameter substantially equal to the diameter of said lumen and to be placed in a generally sealing relationship with said lumen;
b) a porous filter membrane connected to said filter distal portion and said plurality of struts;
c) deploying and releasing means operatively associated with said filter support structure, said deploying and releasing means causing said filter to be positioned in said lumen of said vessel, and causing said filter to achieve said larger second diameter;
d) anti-migration means associated with said filter support structure, said anti-migration means causing said filter to remain substantially stationary in said lumen of said vessel; and
e) retrieving means operatively associated with said filter support structure, said retrieving means allowing recapture of said filter, causing said filter to achieve said smaller first diameter, and allowing removal of said filter from said lumen.
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Accused Products
Abstract
A releasable and retrievable vascular filter system comprising a filter, a porous filter membrane attached to the filter, and an anti-migration feature for causing the filter to remain substantially stationary in the lumen of the vessel during the clinical procedure. The releasable and retrievable vascular filter system minimizes or substantially eliminates filter movement during the procedure, which may result in damage to the lumen, and/or the release of embolic particulates captured within the filter. The releasable and retrievable vascular filter system also allows for guidewire exchanges, which may be necessary for successful completion of the clinical procedure.
217 Citations
36 Claims
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1. A vascular filter system for insertion into a lumen of a vessel, said system comprising:
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a) a filter support structure comprising a proximal portion, a distal portion, and a plurality of struts extending therebetween, said struts further comprising proximal portions and distal portions, said filter having a smaller first diameter for insertion into said lumen, and a second larger diameter for expanding to a diameter substantially equal to the diameter of said lumen and to be placed in a generally sealing relationship with said lumen;
b) a porous filter membrane connected to said filter distal portion and said plurality of struts;
c) deploying and releasing means operatively associated with said filter support structure, said deploying and releasing means causing said filter to be positioned in said lumen of said vessel, and causing said filter to achieve said larger second diameter;
d) anti-migration means associated with said filter support structure, said anti-migration means causing said filter to remain substantially stationary in said lumen of said vessel; and
e) retrieving means operatively associated with said filter support structure, said retrieving means allowing recapture of said filter, causing said filter to achieve said smaller first diameter, and allowing removal of said filter from said lumen. - 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, 25, 26, 27)
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28. A method for capturing embolic particulates within a vascular filter in the lumen of a vessel, comprising the steps of:
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a) providing a filter comprising a filter support structure, having a proximal portion, a distal portion, and a plurality of struts extending therebetween, said filter having a smaller first diameter for insertion into said lumen, and a second larger diameter for expanding to a diameter substantially equal to the diameter of said lumen and to be placed in a generally sealing relationship with said lumen;
said filter further comprising a porous filter membrane attached to said filter distal portion and said plurality of struts;
said filter further comprising anti-migration means for causing said filter to remain substantially stationary in said lumen of said vessel;
said filter further comprising deploying and releasing means for causing said filter to be positioned in said lumen of said vessel, and to achieve said second larger diameter;
said filter further comprising retrieving means for causing said filter to achieve said smaller first diameter and for removing said filter from said lumen;
b) deploying and releasing said filter past an occlusion in said lumen;
c) advancing additional interventional devices into said vessel and positioning said devices at the site of said occlusion in said vessel;
d) performing additional procedures to therapeutically treat said occlusion in said vessel;
e) capturing embolic particulates generated by said procedures in said filter;
f) removing said interventional devices from said guidewire; and
g) retrieving said filter.
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29. A vascular filter system for insertion into a lumen of a vessel, said system comprising:
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a) a filter support structure comprising a proximal portion, a distal portion, and a plurality of struts extending therebetween, said struts further comprising proximal portions and distal portions, said filter having a smaller first diameter for insertion into said lumen, and a second larger diameter for expanding to a diameter substantially equal to the diameter of said lumen and to be placed in a generally sealing relationship with said lumen;
b) a porous filter membrane connected to said filter distal portion and said plurality of struts;
c) deploying and releasing means operatively associated with said filter support structure, said deploying and releasing means causing said filter to be positioned at a specific location in said lumen of said vessel, and to achieve said larger second diameter;
said deploying means comprising a storage tube having an proximal end and a distal end and an inner lumen, with said distal end of said filter slidably insertable into said proximal end of said storage tube;
said deploying means further comprising a catheter having an outer diameter and an inner diameter, a proximal end and a distal end, and an inner lumen, with said distal end of storage tube containing said filter slidably insertable into said proximal end of said catheter;
said deploying means further comprising an obdurator having an outer diameter, a proximal end and a distal end, with said distal end of said obdurator slidably insertable into said proximal end of said storage tube until said distal end of said obdurator is substantially in contact with said proximal end of said filter, and said obdurator is positioned to push said filter into said proximal end of said catheter, through said lumen of said catheter, and out of said distal end of said catheter;
d) anti-migration means associated with said filter support structure, said anti-migration means causing said filter to remain substantially stationary in said lumen of said vessel, said anti-migration means comprising hooks attached to said struts; and
e) retrieving means operatively associated with said filter support structure, said retrieving means allowing recapture of said filter, causing said filter to achieve said first smaller diameter, and allowing removal said filter from said lumen;
said retrieving means comprising a wire having an outer diameter, a proximal end and a distal end, said retrieving means further comprising a ball attached near said distal end of said wire and a receiver attached near said proximal portion of said filter.
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30. A vascular filter system for insertion into a lumen of a vessel, said system comprising:
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a) a filter support structure comprising a proximal portion, a distal portion, and a plurality of struts extending therebetween, said struts further comprising proximal portions and distal portions, said filter having a smaller first diameter for insertion into said lumen, and a second larger diameter for expanding to a diameter substantially equal to the diameter of said lumen and to be placed in a generally sealing relationship with said lumen;
b) a porous filter membrane connected to said filter distal portion and said plurality of struts;
c) deploying and releasing means operatively associated with said filter support structure, said deploying means causing said filter to be positioned at a specific location in said lumen of said vessel, and to achieve said larger second diameter;
said deploying means comprising a guidewire, with said proximal end of said filter releasably attachable near and detachable from said distal end of said guidewire;
said deploying means further comprising a catheter having an outer diameter and an inner diameter, a proximal end and a distal end, and an inner lumen, with said proximal end of said guidewire slidaby insertable into said distal end of said catheter until said catheter is coaxially disposed around said guidewire and said filter, and said catheter may be slidably retracted to deploy said filter;
d) anti-migration means associated with said filter support structure, said anti-migration means causing said filter to remain substantially stationary in said lumen of said vessel, said anti-migration means comprising a friction coating; and
e) retrieving means operatively associated with said filter support structure, said retrieving means allowing recapture of said filter, causing said filter to achieve said first smaller diameter, and allowing removal of said filter from said lumen;
said retrieving means comprising a wire having an outer diameter, a proximal end and a distal end, said retrieving means further comprising a hook attached near said distal end of said wire and a hook attached near said proximal end of said filter. - View Dependent Claims (31, 32)
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33. A vascular filter system for insertion into a lumen of a vessel, said system comprising:
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a) a filter support structure comprising a proximal portion, a distal portion, and a plurality of struts extending therebetween, said struts further comprising proximal portions and distal portions, said filter having a smaller first diameter for insertion into said lumen, and a second larger diameter for expanding to a diameter substantially equal to the diameter of said lumen and to be placed in a generally sealing relationship with said lumen;
b) a porous filter membrane connected to said filter distal portion and said plurality of struts;
c) deploying and releasing means operatively associated with said filter support structure, said deploying and releasing means causing said filter to be positioned at a specific location in said lumen of said vessel, and to achieve said larger second diameter;
said deploying means comprising a catheter having an outer diameter and an inner diameter, a proximal end and a distal end, and an inner lumen, said deploying means further comprising a shaft having an outer diameter, a proximal end and a distal end, with said filter attached near said distal end of said shaft, and said catheter coaxially disposed around said shaft and said filter, such that said catheter may be slidably retracted to deploy said filter;
d) anti-migration means associated with said filter support structure, said anti-migration means causing said filter to remain substantially stationary in said lumen of said vessel, said anti-migration means comprising the chronic outward force of Nickel-Titanium alloy; and
e) retrieving means operatively associated with said filter support structure, said retrieving means allowing recapture of said filter, causing said filter to achieve said first smaller diameter, and allowing removal said filter from said lumen;
said retrieving means comprising a snare and a snareable feature on said proximal end of said filter.
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34. A device for use with an emboli-capturing vascular filter, the improvement comprising:
anti-migration means associated with said filter, said anti-migration means causing said filter to remain substantially stationary in said lumen of said vessel.
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35. A device for use with an emboli-capturing, guidewire-based, vascular filter, the improvement comprising:
anti-migration means associated with said filter, said anti-migration means causing said filter to remain substantially stationary in said lumen of said vessel.
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36. A device for use with an emboli-capturing vascular filter, the improvement comprising:
retrieving means operatively associated with said filter, said retrieving means allowing recapture and removal of said filter from said lumen.
Specification