Stent retriever having an expandable fragment guard
First Claim
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1. A stent retriever assembly having a proximal end and a distal end, and comprising:
- (a) a mesh tube having a distal and proximal end, and being connected to a first wire; and
(b) a blood-porous fragment guard mounted at said distal end of said mesh tube, said fragment guard including spokes joined at a central hub and extending radially and proximally from said central hub, and wherein a second wire is connected to said central hub so that when said second wire is pulled proximally relative to said first wire, said hub is pulled proximally, causing said spokes to spread out and causing said fragment guard to widen, and wherein said first wire and said second wire are spaced apart laterally.
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Abstract
A stent retriever assembly having a proximal end and a distal end, and including a mesh tube having a distal and proximal end, and being connected to a first wire. Also, a blood-porous fragment guard is at the distal end of the mesh tube, the fragment guard including spokes joined at a central hub and extending radially and proximally from the central hub, and wherein a second wire is connected to the central hub so that when the second wire is pulled proximally relative to the first wire, the hub is pulled proximally, causing the spokes to spread out and causing the fragment guard to widen.
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Citations
14 Claims
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1. A stent retriever assembly having a proximal end and a distal end, and comprising:
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(a) a mesh tube having a distal and proximal end, and being connected to a first wire; and (b) a blood-porous fragment guard mounted at said distal end of said mesh tube, said fragment guard including spokes joined at a central hub and extending radially and proximally from said central hub, and wherein a second wire is connected to said central hub so that when said second wire is pulled proximally relative to said first wire, said hub is pulled proximally, causing said spokes to spread out and causing said fragment guard to widen, and wherein said first wire and said second wire are spaced apart laterally. - View Dependent Claims (2, 3, 4, 5)
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6. A method of removing a clot from an artery, comprising:
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(a) providing a stent retriever assembly having a proximal end and a distal end, and including; (i) a mesh tube having a distal and proximal end, and being connected to a first wire; and (ii) a blood-porous fragment guard mounted at said distal end of said mesh tube, said fragment guard including spokes joined at a central hub and extending radially and proximally from said central hub, and wherein a second wire is connected to said central hub so that when said second wire is pulled proximally relative to said first wire, said hub is pulled proximally, causing said spokes to spread out and causing said fragment guard to widen, and wherein said first wire and said second wire are spaced apart laterally; (b) deploying said stent retriever to a proximal side of said clot; (c) pushing said stent retriever through said clot; (d) pulling said second wire relative to said first wire, thereby widening said fragment guard; and (e) pulling said stent retriever proximally to pull material from said clot proximally. - View Dependent Claims (7, 8, 9)
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10. A stent retriever catheter assembly having a proximal end and a distal end, and comprising:
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(a) a catheter, including a flexible tube sized to fit through the arterial system of a person, and to reach a blood clot in an artery; (b) a first and second wire, extending through said tube; (c) a handle connected to said first and second wires, and wherein said first and second wires can be advanced and retracted with at least 1 cm of independence relative to each other, (d) a mesh tube having a distal and proximal end, and being connected at said proximal end to said first wire; and (e) a blood-porous fragment guard mounted at said distal end of said mesh tube, said fragment guard including spokes joined at a central hub and extending radially and proximally from said central hub, and wherein said second wire is connected to said central hub so that when said second wire is pulled proximally relative to said first wire, said hub is pulled proximally, causing said spokes to spread out and causing said fragment guard to widen, and wherein said first wire and said second wire are spaced apart laterally. - View Dependent Claims (11, 12, 13, 14)
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Specification