Methods and systems for treatment of acute ischemic stroke

Patent metadata

Field	Value
Publication number	US-12343480-B2
Application number	US-202017093401-A
Country	US
Kind code	B2
Filing date	Nov 9, 2020
Priority date	Dec 23, 2013
Publication date	Jul 1, 2025
Grant date	Jul 1, 2025

Abstract

A system of devices for treating an artery includes an arterial access sheath adapted to introduce an interventional catheter into an artery and an elongated dilator positionable within the internal lumen of the sheath body. The system also includes a catheter formed of an elongated catheter body sized and shaped to be introduced via a carotid artery access site into a common carotid artery through the internal lumen of the arterial access sheath. The catheter has an overall length and a distal most section length such that the distal most section can be positioned in an intracranial artery and at least a portion of the proximal most section is positioned in the common carotid artery during use.

First claim

What is claimed is:

1. A suction catheter system comprising:
an arterial access device comprising:
a tubular shaft having a proximal end, a distal opening, and a central lumen having an inner diameter; and
a proximal section operably connected with the proximal end of the tubular shaft and having a fitting that connects to a suction device; and

an extension catheter comprising:
a distal catheter portion having a proximal end, a distal end, and only a single lumen extending between the proximal end and the distal end of the distal catheter portion; and
a proximal tether extending proximally from a point of attachment with the distal catheter portion, wherein the proximal tether is capable of controlling movement of the extension catheter,

wherein the extension catheter is configured to telescopically slide through the central lumen of the tubular shaft, out of the distal opening until the distal end of the distal catheter portion reaches the target site,
wherein an outer diameter of a proximal end region of the distal catheter portion is larger than an outer diameter of a distal end region of the distal catheter portion, and wherein the distal catheter portion of the extension catheter comprises a step up from the outer diameter of the distal end region of the distal catheter portion to the outer diameter of the proximal end region of the distal catheter portion while the single lumen of the distal catheter portion has an inner diameter through the distal end region and an inner diameter through the proximal end region, including where the step up is located, that remain unchanged, wherein the step up is over a transition section that is between 3 mm and 10 mm, and
wherein the proximal end region of the distal catheter portion and the inner diameter of the central lumen forms a seal and the seal forms a contiguous lumen extending from the distal end of the distal catheter portion to the proximal end of the arterial access device, and
wherein the distal catheter portion is flexible to navigate around a 180° bend with a radius of 0.100″ without kinking and does not collapse when connected to a vacuum up to 25 inHg while navigating around the 180° bend.

2. The system of claim 1 , wherein the proximal tether of the extension catheter is formed of a metal.

3. The system of claim 1 , wherein the distal catheter portion of the extension catheter comprises a reinforcement layer of wound ribbon, wire, coil, or braid.

4. The system of claim 1 , wherein a transition zone between the proximal tether and the distal catheter portion of the extension catheter is formed that bridges a flexibility of the distal catheter portion of the extension catheter and a flexibility of the proximal tether so as to avoid kinking during telescopically sliding the extension catheter.

5. The system of claim 4 , wherein at least a portion of the proximal tether is flattened, ground down, or down-sized to be more flexible at the transition zone.

6. The system of claim 1 , wherein the inner diameter of the central lumen is uniform and is about 0.086″ to about 0.088″.

7. The system of claim 1 , wherein the outer diameter of the proximal end of the distal catheter portion of the extension catheter is about 0.083″ to about 0.086″.

8. The system of claim 1 , wherein the arterial access device is between 6 F and 8 F.

9. The system of claim 8 , wherein the outer diameter of the proximal end region of the distal catheter portion is between 0.083″ and 0.086″.

10. The system of claim 1 , wherein the inner diameter of the single lumen is about 0.070″ to about 0.095″ and the distal catheter portion has a length that is about 25 cm to about 50 cm.

11. The system of claim 1 , wherein the proximal tether comprises a wire.

12. The system of claim 1 , wherein the proximal tether is flattened along a transition zone with the distal catheter portion.

Assignees

• Route 92 Medical Inc

Inventors

• Garrison Michi E
• Chou Tony M

Classifications

• A61B17/00

  Surgical instruments, devices or methods (A61B18/00 takes precedence; dental tools A61C3/00; eye surgery A61F9/007; ear surgery A61F11/20) · CPC title

• A61F2/013

  Distal protection devices, i.e. devices placed distally in combination with another endovascular procedure, e.g. angioplasty or stenting · CPC title

• A61B2017/22074

  the instrument being only slidable in a channel, e.g. advancing optical fibre through a channel · CPC title

• A61B2017/22067

  Blocking; Occlusion (A61B2017/22054 takes precedence) · CPC title

• A61B2017/22062

  to be filled with liquid · CPC title