Thrombus extraction catheter
AssigneeGmedix, Inc.
InventorsJeffrey M. Welch, Karl V. Ganske, Gregg Stuart Sutton
Life of this patent
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Abstract
Embodiments of the invention include a multi-lumen catheter for extracting or aspirating a blood clot or thrombus from arterial or veinous sites. Other embodiments are also included herein.
Claims31
A two lumen catheter for use in arterial or veinous interventional procedures for extracting thrombus or clot comprising:
- a first main lumen (1) configured for sucking or aspirating a blood clot, the first main lumen extending from the distal tip to the proximal end, the first lumen comprising metal with a metal internal surface where the distal portion is constructed from a swaged, multi-filar coil structure (2), such that the individual coil wire cross-sections are substantially rectangular in shape, a proximal portion (3) of the first lumen attached to the distal portion and being made of substantially metal tubing, the proximal portion of the first lumen being metallically fused to the distal portion, the proximal portion being terminated at its proximal end with a luer adapter (8);
- a second lumen (4), configured to a guidwire to pass through, extending from the distal tip and exiting or terminating at a point proximal of the distal tip at a distance of 1-50 cm, the second lumen being attached adjacent to an outside wall of the first main lumen;
- and
- a distal tip structure (5) attached to the distal portion of the first main lumen that is substantially constructed of metal and angled at its distal end in an amount of 30-60 degrees from the central axis of the lumen, the distal tip being attached by metal fusion to the distal coil portion, the distal tip being externally coated with a gold plating for enhanced radiopacity.
The two lumen catheter of any of claims 1 and 3-31, wherein the distal tip portion (7) is made substantially of metal and has a strut attached to the outside wall of the first main lumen and extending distally and attached at a second point to the second lumen at a point distal to the termination of the first lumen so as to provide a guard inhibiting suction of the artery or vein wall against the first lumen opening.
The two lumen catheter of any of claims 1-2 and 4-31, wherein entire external and internal surfaces of the device are jacketed or coated with a thin polymeric layer (6).
The two lumen catheter of any of claims 1-3 and 5-31, wherein the external surface of the distal portion of the device is coated with hydrophilic polymer.
The two lumen catheter of any of claims 1-4 and 6-31, wherein the internal surface of the first lumen is coated with a silicone friction reducing polymer.
The two lumen catheter of any of claims 1-5 and 7-31, wherein the distal portion of the main lumen has individual coil wire cross-sections that are elliptical in shape.
The two lumen catheter of any of claims 1-6 and 8-31, wherein the metal helically wound multi-filar layer is made of stainless steel.
The two lumen catheter of any of claims 1-7 and 9-31, wherein the multi-filar structure is made using 6-20 filars.
The two lumen catheter of any of claims 1-8 and 10-31, wherein the multi-filar structure wire has been swaged so as to impart a rectangular cross-section and intimate fitting contact between adjacent wires.
The two lumen catheter of any of claims 1-9 and 11-31, wherein the outer diameter of the main tubular shaft is between 0.039-0.105″.
The two lumen catheter of any of claims 1-10 and 12-31, wherein the outer polymer jacket is made of PTFE.
The two lumen catheter of any of claims 1-11 and 13-31, wherein the outer polymer jacket is made of nylon.
The two lumen catheter of any of claims 1-12 and 14-31, wherein the outer polymer jacket is coated with a hydrophilic polymer.
The two lumen catheter of any of claims 1-13 and 15-31, wherein the inner polymer jacket is made of PTFE.
The two lumen catheter of any of claims 1-14 and 16-31, wherein the inner polymer jacket is made of a PTFE/Pebax composite layer.
The two lumen catheter of any of claims 1-15 and 17-31, wherein the inner polymer jacket is made of nylon.
The two lumen catheter of any of claims 1-16 and 18-31, wherein the inner polymer jacket is coated with a hydrophilic polymer.
The two lumen catheter of any of claims 1-17 and 19-31, wherein the distal portion is made of a PTFE inner layer and Pebax outer layer.
The two lumen catheter of any of claims 1-18 and 20-31, wherein the helical multi-filar inner layer has welded terminations.
The two lumen catheter of any of claims 1-19 and 21-31, where the helical multi-filar inner layer has a distal tip that has been coated with gold for 0.5-2 mm.
The two lumen catheter of any of claims 1-20 and 22-31, wherein the outer jacket is made of Pebax.
The two lumen catheter of any of claims 1-21 and 23-31, wherein the outer jacket is made of two layers of Pebax.
The two lumen catheter of any of claims 1-22 and 24-31, wherein the outer jacket layer is heat shrinkable to allow it to be formed tightly onto the helical multi-filar structure.
The two lumen catheter of any of claims 1-23 and 25-31, wherein the multi-filar structure wire has a rectangular cross-section.
The two lumen catheter of any of claims 1-24 and 26-31, wherein the multi-filar structure wire has a circular cross-section.
The two lumen catheter of any of claims 1-25 and 27-31, wherein the multi-filar structure wire has a oval or elliptical cross-section.
The two lumen catheter of any of claims 1-26 and 28-31, wherein the multi-filar structure wires have been coated with PTFE coating prior to forming into the multi-filar configuration.
The two lumen catheter of any of claims 1-27 and 29-31, wherein the first lumen comprises at least 35% metal.
The two lumen catheter of any of claims 1-28 and 30-31, wherein the first lumen comprises 35%-65% metal.
The two lumen catheter of any of claims 1-29 and 31, wherein the distal portion is 10-50 cm in length.
Dependencies are inferred from the claim text.