IP Library Granted Patent US 12,343,480
Granted Patent B2
US 12,343,480 · App. 17/093,401 · Granted Jul 1, 2025

Methods and systems for treatment of acute ischemic stroke

Inventors: Michi E. Garrison (San Mateo, CA); Tony M. Chou (San Mateo, CA)
Assignee: Route 92 Medical, Inc.
A61M25/0054A61B17/22A61B17/320758A61B17/3417A61F2/013A61M25/0023A61M25/0041A61M25/0043A61M25/0068A61M25/01A61M25/0662A61M29/00A61B2017/00867A61B2017/00991A61B2017/22034A61B2017/22038A61B2017/22039A61B2017/22042A61B2017/22054A61B2017/22062A61B2017/22067A61B2017/22072A61B2017/22074A61B2017/22079A61B2017/22082A61B2017/22084A61B2017/22094A61B2017/2212A61B2017/2215A61B2017/2217A61B2017/320775A61B2017/3484A61B2017/3486A61B2090/062A61M2025/0004A61M2025/0037A61M2025/0042A61M25/0053A61M25/007A61M2025/0175A61M2025/0681A61M2025/1052A61M2210/12
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Quick Facts
Patent No.
US 12,343,480
App. No.
17/093,401
Granted
Jul 1, 2025
Kind
B2
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.

Claims (22)

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.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 6, 2021
From: GARRISON, MICHI E.; CHOU, TONY M.
To: ROUTE 92 MEDICAL, INC.
Reel/Frame 055836/0099 →
Continuity (11)
Continuation 16931234 · Jul 16, 2020
Continuation 15699401 · Sep 8, 2017
Continuation 15425460 · Feb 6, 2017
Continuation 14576953 · Dec 19, 2014
Provisional Application 62083128 · Nov 21, 2014
Provisional Application 62075169 · Nov 4, 2014
Provisional Application 62075101 · Nov 4, 2014
Provisional Application 62046112 · Sep 4, 2014
Provisional Application 62029799 · Jul 28, 2014
Provisional Application 61919945 · Dec 23, 2013
Related Publication 20210069467A1 · Mar 11, 2021
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