Looped clot retriever wire
First Claim
1. A clot retrieval system comprising:
- an elongated sheath having a lumen disposed therein, the lumen having an inner diameter;
a wire assembly disposed within the elongated sheath, the wire assembly comprising a straight section and a curved section, a distal end of the straight section connected to a proximal end of the curved section, the curved section being comprised of a first wire segment extending distally from the proximal end of the curved section and biased to curve in a first circumferential direction, a second wire segment extending distally from the proximal end of the curved section and biased to curve in a second circumferential direction opposite the first circumferential direction, the first wire segment and second wire segment forming a first loop having a first loop proximal end and a first loop distal end, the first wire segment being connected to the second wire segment at the first loop proximal end and the first loop distal end to prevent the first wire segment from moving relative to the second wire segment, a third wire segment extending distally from the first loop distal end and biased to curve in the first circumferential direction, a fourth wire segment extending distally from the first loop distal end and biased to curve in the second circumferential direction, the third wire segment and fourth wire segment forming a second loop having a second loop proximal end and a second loop distal end, the third wire segment being connected to the fourth wire segment at the second loop proximal end and the second loop distal end to prevent the third wire segment from moving relative to the fourth wire segment, wherein the second loop proximal end is connected to and extends from the first loop distal end, and a side view of the first loop and the second loop is arc-shaped;
an elastic membrane secured to the third wire segment and the fourth wire segment and not secured to the first wire segment or second wire segment, the membrane bridging the second loop and configured to collect clot material; and
a mesh comprised of a plurality of woven filaments secured to the first wire segment and the second wire segment and not secured to the third wire segment or the fourth wire segment, the mesh bridging the first loop and configured to break up a clot into smaller pieces;
wherein the curved section of the wire assembly is disposed on only one side of an axis defined by the straight section of the wire assembly.
3 Assignments
0 Petitions
Accused Products
Abstract
A clot retrieval system for removing clots from a body lumen. The clot retrieval system includes an elongated sheath and a wire assembly. The wire assembly is comprised of four wire segments, each biased to have a distally extending circumferential curve. Two wire segments are connected together at a proximal end and a distal end to form a first loop, and are connected to a shaft. Two other wire segments are connected together at a proximal end and a distal end to form a second loop and are connected to the first two wire segments. The second loop is covered with a membrane to catch clots. The wire assembly may be compacted by retracting it within the elongated sheath, or expanded by extending it from the elongated sheath.
27 Citations
18 Claims
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1. A clot retrieval system comprising:
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an elongated sheath having a lumen disposed therein, the lumen having an inner diameter; a wire assembly disposed within the elongated sheath, the wire assembly comprising a straight section and a curved section, a distal end of the straight section connected to a proximal end of the curved section, the curved section being comprised of a first wire segment extending distally from the proximal end of the curved section and biased to curve in a first circumferential direction, a second wire segment extending distally from the proximal end of the curved section and biased to curve in a second circumferential direction opposite the first circumferential direction, the first wire segment and second wire segment forming a first loop having a first loop proximal end and a first loop distal end, the first wire segment being connected to the second wire segment at the first loop proximal end and the first loop distal end to prevent the first wire segment from moving relative to the second wire segment, a third wire segment extending distally from the first loop distal end and biased to curve in the first circumferential direction, a fourth wire segment extending distally from the first loop distal end and biased to curve in the second circumferential direction, the third wire segment and fourth wire segment forming a second loop having a second loop proximal end and a second loop distal end, the third wire segment being connected to the fourth wire segment at the second loop proximal end and the second loop distal end to prevent the third wire segment from moving relative to the fourth wire segment, wherein the second loop proximal end is connected to and extends from the first loop distal end, and a side view of the first loop and the second loop is arc-shaped; an elastic membrane secured to the third wire segment and the fourth wire segment and not secured to the first wire segment or second wire segment, the membrane bridging the second loop and configured to collect clot material; and a mesh comprised of a plurality of woven filaments secured to the first wire segment and the second wire segment and not secured to the third wire segment or the fourth wire segment, the mesh bridging the first loop and configured to break up a clot into smaller pieces; wherein the curved section of the wire assembly is disposed on only one side of an axis defined by the straight section of the wire assembly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A looped wire assembly comprising:
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a straight section comprising a shaft having a shaft distal end and a shaft proximal end; a first wire segment connected to the shaft distal end and extending distally and biased to curve in a first circumferential direction; a second wire segment connected to the shaft distal end and extending distally and biased to curve in a second circumferential direction opposite the first circumferential direction, the first wire segment and second wire segment forming a first loop having a first loop proximal end and a first loop distal end, the first wire segment being connected to the second wire segment at the first loop proximal end and the first loop distal end to prevent the first wire segment from moving relative to the second wire segment; a third wire segment connected to the first loop distal end and extending distally and biased to curve in the first circumferential direction; a fourth wire segment connected to the first loop distal end and extending distally and biased to curve in the second circumferential direction, the third wire segment and the fourth wire segment forming a second loop having a second loop proximal end and a second loop distal end, the third wire segment being connected to the fourth wire segment at the second loop proximal end and the second loop distal end to prevent the third wire segment from moving relative to the fourth wire segment; a flexible membrane secured to the third wire segment and the fourth wire segment and not secured to the first wire segment or second wire segment, the membrane bridging the second loop and configured to collect clot material; and a mesh comprised of a plurality of woven filaments secured to the first wire segment and the second wire segment and not secured to the third wire segment or the fourth wire segment, the mesh bridging the first loop and configured to break up a clot into smaller pieces; wherein the first loop and the second loop are disposed on only one side of an axis defined by the straight section, the second loop proximal end is connected to and extends from the first loop distal end, and a side view of the first loop and the second loop is arc-shaped. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification