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US 2019/0336148 A1Published application
Mechanical thrombectomy apparatuses and methods
AssigneeStryker Corporation
InventorsE. Skott Greenhalgh, Michael P. Wallace
Life of this patent
Estimating the term…
Abstract
Methods and apparatuses for mechanically removing objects from a body. In particular, described herein are thrombectomy methods and mechanical thrombectomy apparatuses for removal of blood clots from within a lumen of a blood vessel.
Claims21
(canceled)
A mechanical thrombectomy apparatus for removing a clot from a vessel, the apparatus comprising:
- a catheter having a distal end, a distal end opening, and an inner diameter;
- a knit tube extending through the catheter and doubling back over the distal end of the catheter, wherein the knit tube is configured to invert over the distal end opening when a first end of the knit tube is pulled proximally within the catheter,
- wherein the knit tube is biased to have an outer diameter when inverted within the catheter that is greater than half the inner diameter of the catheter when the knit tube is pulled proximally from within the catheter so that an outer portion of the knit tube slides over an outside of the catheter to invert over the distal end opening,
- further wherein the knit tube forms a distal-facing lip where the knit tube inverts over the distal end opening, the distal-facing lip having a larger outer diameter than an outer diameter of the outer portion of the knit tube proximal to the distal-facing lip;
- and
- a puller extending within the catheter, the puller having a guidewire lumen configured to pass a guidewire, wherein the first end of the knitted tube is attached to the puller.
3 more elements
A mechanical thrombectomy apparatus for removing a clot from a vessel, the apparatus comprising:
- a catheter having a distal end, a distal end opening, an outer diameter and an inner diameter, wherein the distal end of the catheter is configured to be compressed proximally so that it flares out at the distal end;
- a knit tube extending through the catheter and doubling back over the distal end of the catheter, wherein the knit tube is configured to invert over the distal end opening when a first end of the knit tube is pulled proximally within the catheter,
- wherein the knit tube is biased to have an outer diameter when inverted within the catheter so that is the knitted tube radially compresses 20% or less when the knit tube is pulled around the outside of the catheter tip and into the catheter so that an outer portion of the knit tube slides over an outside of the catheter to invert over the distal end opening,
- further wherein the knit tube forms a distal-facing lip where the knit tube inverts over the distal end opening, the distal-facing lip having a larger outer diameter than an outer diameter of the outer portion of the knit tube proximal to the distal-facing lip;
- and
- a puller extending within the catheter, the puller having a guidewire lumen configured to pass a guidewire, wherein the first end of the knitted tube is attached to the puller.
3 more elements
A mechanical thrombectomy apparatus for removing a clot from a vessel, the apparatus comprising:
- a catheter having a distal end, a distal end opening, an outer diameter and an inner diameter, wherein the distal end of the catheter is configured to be compressed proximally so that it flares out at the distal end;
- a knit tube extending through the catheter and doubling back over the distal end of the catheter, wherein the knit tube is configured to roll and invert over the distal end opening when a first end of the knit tube is pulled proximally within the catheter,
- wherein the knit tube is biased to have an outer diameter when inverted within the catheter that is greater than half the inner diameter of the catheter when the knit tube is pulled proximally from within the catheter so that an outer portion of the knit tube slides over an outside of the catheter to invert over the distal end opening,
- further wherein the knit tube forms a distal-facing lip where the knit tube inverts over the distal end opening, the distal-facing lip having a larger outer diameter than an outer diameter of the outer portion of the knit tube proximal to the distal-facing lip;
- and
- a puller extending within the catheter, the puller having a guidewire lumen configured to pass a guidewire, wherein the first end of the knitted tube is attached to the puller.
3 more elements
Dependencies are inferred from the claim text.