Guidewire having deployable sheathless protective filter
First Claim
1. Apparatus for use in vascular procedures comprising:
- a. a tubular guidewire having a proximal end, a distal ends, and a lumen;
b. a control cable having a proximal end and a distal end disposed in the lumen of the tubular guidewire; and
, c. a sheathless filter distally coupled to the control cable and proximally coupled to the tubular guidewire, the sheathless filter being radially expandable in response to displacement of the control cable relative to the tubular guidewire such that the sheathless filter presents at least a convex primary filter surface to a flow of blood within a blood vessel when introduced thereinto and expanded.
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Accused Products
Abstract
A protective system or apparatus for use in vascular procedures includes a tubular guidewire, a control cable slidable within the tubular guidewire, and a sheathless filter. The control cable is attached to a distal end of the sheathless filter and the tubular guidewire is attached to a proximal end of the sheathless filter. Selective displacement of the control cable radially expands the sheathless filter to create a proximal exterior convex primary filter surface that is positionable downstream from a site of a vascular procedure. The sheathless filter also presents a distal interior concave secondary filter surface. Preferably, the sheathless filter is constructed of a braided wire framework in the form of a tube over which woven polymer fibers or strands are applied to create a filter mesh having a softer filter surface.
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Citations
45 Claims
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1. Apparatus for use in vascular procedures comprising:
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a. a tubular guidewire having a proximal end, a distal ends, and a lumen;
b. a control cable having a proximal end and a distal end disposed in the lumen of the tubular guidewire; and
,c. a sheathless filter distally coupled to the control cable and proximally coupled to the tubular guidewire, the sheathless filter being radially expandable in response to displacement of the control cable relative to the tubular guidewire such that the sheathless filter presents at least a convex primary filter surface to a flow of blood within a blood vessel when introduced thereinto and expanded. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of protecting against plaque, thrombus or grumous material flowing downstream during a vascular procedure, the method comprising:
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a. guiding a tubular guidewire into a blood vessel and positioning a sheathless filter proximate a distal end of the tubular guidewire distal to a region of the blood vessel to be treated;
b. displacing a control cable coaxially disposed with the tubular guidewire to cause expansion of the sheathless filter to span a diameter of the blood vessel and present at least a convex surface to a flow of blood within the blood vessel;
c. selectively securing the control cable relative to the tubular guidewire to maintain a position of the sheathless filter during the vascular procedure;
d. performing the vascular procedure;
e. introducing a thrombectomy catheter over a proximal end of the tubular guidewire and advancing the thrombectomy catheter to the region of the blood vessel to be treated;
f. removing plaque, thrombus or grumous material captured by the sheathless filter during the vascular procedure via the thrombectomy catheter;
g. releasing the control cable relative to the tubular guidewire and causing the sheathless filter to contract; and
,h. withdrawing the tubular guidewire from the blood vessel. - View Dependent Claims (20, 21, 22, 23, 33, 34, 35, 36, 37, 38)
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24. A system for filtering and removing plaque, thrombus or grumous material coincident with a vascular procedure comprising:
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a. a guidewire having a sheathless filter positioned proximate a distal end of the guidewire, the sheathless filter being selectively deployable such that the sheathless filter presents at least a convex filter surface to a flow of blood within a blood vessel when introduced into the blood vessel and deployed prior to the vascular procedure;
b. an evacuation catheter having an evacuation lumen to be tracked over the guidewire and at least one evacuation opening proximate a distal end of the evacuation lumen; and
,c. means for removing plaque, thrombus or grumous material captured by the sheathless filter during the vascular procedure via the evacuation lumen of the evacuation catheter prior to the sheathless filter being selectively undeployed and the guidewire removed from the vessel. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 39, 40, 41, 42, 43, 44, 45)
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Specification