INVERTING THROMBECTOMY APPARATUSES AND METHODS
First Claim
Patent Images
1. A mechanical thrombectomy apparatus for removing a clot from a vessel, the apparatus comprising:
- an elongate inversion support catheter having a distal end and a distal end opening;
an elongate puller extending within the elongate inversion support catheter;
a flexible tractor tube having a free first end and a second end that is coupled to a distal end region of the elongate puller, wherein the flexible tractor tube is inverted over the elongate puller and is held within the elongate inversion support catheter in a collapsed first configuration; and
an annular bias disposed at least partially around the free first end of the flexible tractor tube,wherein the flexible tractor tube is configured to be extended from the distal end opening of the elongate inversion support catheter and to expand into an expanded second configuration, andwherein the annular bias has a diameter that is larger than an outer diameter of the elongate inversion support catheter when the flexible tractor tube is in the expanded second configuration.
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Accused Products
Abstract
Rolling tractor tube mechanical thrombectomy apparatuses that may be deployed from out of a catheter in situ are described herein. These apparatuses may be delivered out of a catheter from a collapsed delivery configuration within the catheter to a deployed configuration out of the catheter, in which the same catheter is re-inserted between a tubular tractor and an elongate puller. In particular, any of these methods and apparatuses may be adapted to work with a tractor tube having an open end that is biased open, including using an annular bias.
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Citations
26 Claims
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1. A mechanical thrombectomy apparatus for removing a clot from a vessel, the apparatus comprising:
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an elongate inversion support catheter having a distal end and a distal end opening; an elongate puller extending within the elongate inversion support catheter; a flexible tractor tube having a free first end and a second end that is coupled to a distal end region of the elongate puller, wherein the flexible tractor tube is inverted over the elongate puller and is held within the elongate inversion support catheter in a collapsed first configuration; and an annular bias disposed at least partially around the free first end of the flexible tractor tube, wherein the flexible tractor tube is configured to be extended from the distal end opening of the elongate inversion support catheter and to expand into an expanded second configuration, and wherein the annular bias has a diameter that is larger than an outer diameter of the elongate inversion support catheter when the flexible tractor tube is in the expanded second configuration. - 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 mechanical thrombectomy apparatus for removing a clot from a vessel, the apparatus comprising:
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an elongate inversion support catheter having a distal end and a distal end opening; an elongate puller extending within the elongate inversion support catheter, wherein the elongate puller comprises a central lumen; a flexible tractor tube having a free first end and a second end that is coupled to a distal end region of the elongate puller, wherein the flexible tractor tube comprises a woven, braided, mesh and/or knitted material, is inverted over the elongate puller, and is held within the elongate inversion support catheter in a collapsed first configuration, and wherein the flexible tractor tube is biased in an un-inverted configuration to expand to between 1.1 and 4 times an outer diameter of the elongate inversion support catheter in and is further biased in an inverted configuration to expand to greater than 0.5×
an inner diameter of the elongate inversion support catheter; andan annular bias disposed at least partially around the free first end of the flexible tractor tube, wherein the flexible tractor tube is configured to be extended from the distal end opening of the elongate inversion support catheter and to expand into an expanded second configuration, wherein the annular bias has a diameter that is larger than an outer diameter of the elongate inversion support catheter in the expanded second configuration so that the elongate inversion support catheter may be pushed through the annular bias and between the flexible tractor tube and an outer wall of the elongate puller.
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20. A method of deploying a mechanical thrombectomy apparatus for removing a clot from a vessel, the method comprising:
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positioning an elongate inversion support catheter within a lumen of the vessel; extending an elongate puller and a flexible tractor tube out of a distal end of the elongate inversion support catheter, wherein the flexible tractor tube has a free first end coupled to an annular bias and a second end that is coupled to a distal end region of the elongate puller, so that the flexible tractor tube expands from a collapsed first configuration within the elongate inversion support catheter into an expanded second configuration, and wherein the annular bias holds the flexible tractor tube open to a diameter that is larger than an outer diameter of the elongate inversion support catheter when the flexible tractor tube is in the expanded second configuration; advancing the elongate inversion support catheter distally through the annular bias and between the flexible tractor tube and the elongate puller; and pulling the elongate puller proximally to roll the flexible tractor tube over a distal end opening of the elongate inversion support catheter so that the flexible tractor tube inverts into the elongate inversion support catheter, wherein the flexible tractor tube is biased in an un-inverted configuration to expand to between 1.1 and 4 times an outer diameter of the elongate inversion support catheter and is further biased in an inverted configuration to expand to greater than 0.5×
an inner diameter of the elongate inversion support catheter within the elongate inversion support catheter. - View Dependent Claims (21, 22, 23, 24, 25, 26)
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Specification