Embolic protection guide wire
First Claim
1. A device for passing fluid in a vessel while preventing emboli in the fluid from passing through the vessel, comprising:
- a guide wire having a proximal and distal end;
a sheath attached to the guide wire near its distal end;
a tubular shaft member having a proximal and distal end which is movable along the guide wire in a co-axial arrangement; and
a filtering assembly attached to the tubular shaft member which is movable between a collapsed and expanded position, the filtering assembly being constricted within the sheath while in the collapsed position and expanded within the vessel when released from constriction within the sheath to become disposed against the vessel to pass fluid in the vessel while blocking the passage of emboli in the vessel.
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Accused Products
Abstract
A sheath attached to a guide wire, a tubular shaft member slidable on the guide wire and a filtering assembly constricted within the sheath are movable in a vessel to a position distal to a lesion in the direction of fluid flow. The filtering assembly may be formed from a plurality of angularly spaced splines and a mesh disposed on the splines having properties of passing fluid in the vessel while blocking the passage of emboli in the fluid. The splines may be provided with shape memory for expanding against the wall of the vessel when released from constriction by the sheath. The sheath may be moved relative to the filtering assembly and the support member to release the filter for expansion against the vessel wall. An interventional device can be used to treat the lesion. Any emboli released into the vessel as a result of the interventional treatment are blocked by the filter member while fluid is allowed to pass there through.
141 Citations
21 Claims
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1. A device for passing fluid in a vessel while preventing emboli in the fluid from passing through the vessel, comprising:
a guide wire having a proximal and distal end;
a sheath attached to the guide wire near its distal end;
a tubular shaft member having a proximal and distal end which is movable along the guide wire in a co-axial arrangement; and
a filtering assembly attached to the tubular shaft member which is movable between a collapsed and expanded position, the filtering assembly being constricted within the sheath while in the collapsed position and expanded within the vessel when released from constriction within the sheath to become disposed against the vessel to pass fluid in the vessel while blocking the passage of emboli in the vessel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of passing fluid in a vessel and of preventing emboli in the fluid from passing through the vessel from a lesion in the vessel, including the steps of:
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providing a filtering assembly having constricted and expanded positions and having properties in the expanded position of passing fluid while blocking the passage of emboli from the lesion, disposing the filtering in a sheath attached to a guide wire in the constricted position with the filtering assembly disposed in the sheath and movable relative to the sheath, positioning the filtering assembly and the sheath in the vessel at a position past the lesion in the direction of the fluid flow in the vessel, producing relative movement between the sheath and the filtering assembly in a direction to move the filtering assembly in the expanded position, and expanding the opening in the vessel at the position of the lesion with an interventional device while the filtering assembly remains in the expanded relationship to provide for the operation of the filtering assembly in passing the fluid while blocking the passage of emboli created during the expansion of the opening in the vessel. - View Dependent Claims (18, 19, 20, 21)
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Specification