Systems and methods for clot disruption and retrieval
First Claim
Patent Images
1. A macerator comprising:
- a tubular shaft having a proximal end, a distal end, and at least one lumen therethrough;
a wire having a distal section terminating in a distal tip and proximal shank;
wherein the distal tip of the wire is attached to an exterior location near the distal end of the tubular shaft and wherein the proximal shank is slidably received in the lumen of the shaft so that the distal section of the wire can be radially expanded and contracted by axially translating the shank within the shaft.
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Accused Products
Abstract
Thrombectomy and other treatments are achieved using a catheter having a positioning cage and a macerator within the positioning cage. The catheter is introduced to a target body lumen, typically a blood vessel, and a positioning cage deployed at a treatment site. The macerator is then operated to disrupt thrombus, clot, or other occlusive materials at the treatment site, and the catheter is used to collect and remove the disruptive materials from the body lumen. In particular examples, the macerator may be radially expansible and optionally rotated and/or axially translated within the positioning cage to effect disruption of the occlusive material.
605 Citations
18 Claims
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1. A macerator comprising:
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a tubular shaft having a proximal end, a distal end, and at least one lumen therethrough;
a wire having a distal section terminating in a distal tip and proximal shank;
wherein the distal tip of the wire is attached to an exterior location near the distal end of the tubular shaft and wherein the proximal shank is slidably received in the lumen of the shaft so that the distal section of the wire can be radially expanded and contracted by axially translating the shank within the shaft. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A macerator comprising:
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a tubular shaft assembly including;
(a) an outer tube having a proximal end, a distal end, and a lumen therethrough; and
(b) an inner tube having a proximal end, a distal end, and a lumen therethrough, wherein the outer tube is slidably and/or rotatably received over the inner tube;
a wire capture coil having one end attached to the proximal end of the inner tube and another end attached to the proximal end of the outer tube, wherein the coil can be radially expanded and collapsed by rotating and/or axially translating the inner tube relative to the outer tube; and
a helical rotor disposed over at least a portion of the tubular shaft, wherein said rotor is configured to act as a mechanical pump when the macerator is rotated about its axis.
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10. A method for removing occlusive material from a body lumen, said method comprising:
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positioning a macerator so that it is spaced inwardly from the occlusive material over a surrounding wall of the body lumen;
rotating and adjusting a width of the macerator to draw in and disrupt the occlusive material without significant shearing; and
withdrawing the disrupted material from the body lumen. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A kit comprising:
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a catheter having a rotatable macerator near a distal end thereof; and
instructions for use setting forth a method comprising;
positioning the macerator within a body lumen so that the macerator is spaced inwardly from occlusive material covering a luminal wall;
rotating and adjusting the width of the macerator to draw in and disrupt the occlusive material without significant shearing; and
withdrawing the disrupted material from the body lumen.
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Specification