Aspiration catheter systems and methods of use

Patent metadata

Field	Value
Publication number	US-12533145-B2
Application number	US-202217859955-A
Country	US
Kind code	B2
Filing date	Jul 7, 2022
Priority date	Feb 4, 2015
Publication date	Jan 27, 2026
Grant date	Jan 27, 2026

Abstract

Described are methods, systems, devices for facilitation of intraluminal medical procedures within the neurovasculature. A catheter advancement device includes a flexible elongate body having a proximal end, a distal end, and a single lumen extending therebetween. The flexible elongate body has a proximal segment, an intermediate segment, and a tip segment. The proximal segment includes a hypotube coated with a polymer. The intermediate segment includes an unreinforced polymer having a durometer of no more than 72D. The tip segment is formed of a polymer different from the intermediate segment and has a durometer of no more than about 35D and a length of at least 5 cm. The tip segment has a tapered portion that tapers distally from a first outer diameter to a second outer diameter over a length of between 1 and 3 cm.

First claim

What is claimed is:

1 . A catheter system comprising:
a neurovascular catheter comprising a catheter lumen and a distal end; and an intravascular catheter advancement device for advancing the neurovascular catheter, the catheter advancement device comprising:
a flexible elongate body having a proximal end with a proximal opening, a distal end with a distal opening, and a single lumen extending between the proximal opening and the distal opening having an inner diameter sized to receive a guidewire and that is less than 0.024″, the flexible elongate body comprising:
a proximal segment;
an intermediate wall segment connected to the proximal segment and comprising a polymer having a first durometer, wherein a location of a material transition between the intermediate segment and the proximal segment is at least 49 cm from the distal end; and
an unreinforced wall segment distal of the intermediate wall segment formed of a polymer different from the polymer of the intermediate wall segment, the polymer of the unreinforced wall segment having a second durometer less than the first durometer, wherein the unreinforced wall segment has a tapered portion that tapers distally from a first outer diameter to a second outer diameter over a length between 0.5 cm and 4.0 cm,

wherein the flexible elongate body has a length configured to extend from outside a patient's body, through a point of insertion in a peripheral artery, and to a middle cerebral artery circulation and wherein the catheter advancement device is configured to navigate to the middle cerebral artery circulation without applying straightening forces on the neurovasculature, and wherein a flexibility of the unreinforced wall segment at the distal end of the flexible elongate body is greater than a flexibility of the distal end of the neurovascular catheter.

2 . The system of claim 1 , wherein the tapered portion is formed entirely of the same polymer.

3 . The system of claim 1 , wherein the proximal segment comprises a hypotube.

4 . The system of claim 3 , wherein the hypotube has a cut side wall.

5 . The system of claim 1 , wherein the proximal segment comprises a reinforced polymer with metallic or non-metallic braid or coil.

6 . The system of claim 1 , wherein the proximal segment is reinforced by a coiled ribbon.

7 . The system of claim 1 , wherein the proximal segment has an outer diameter that is less than an outer diameter of the intermediate wall segment.

8 . The system of claim 1 , wherein the proximal segment is covered with a lubricious polymer.

9 . The system of claim 1 , wherein an inner diameter of the intermediate wall segment and the unreinforced wall segment distal of the intermediate wall segment is constant.

10 . The system of claim 1 , wherein a wall thickness of the intermediate wall segment and an untapered portion of the unreinforced wall segment is constant.

11 . The system of claim 1 , wherein the flexible elongate body further comprises a reinforced wall segment.

12 . The system of claim 11 , wherein the reinforced wall segment comprises a metallic structure extending a length of the flexible elongate body.

13 . The system of claim 12 , wherein the metallic structure of the reinforced wall segment extends up to the unreinforced wall segment.

14 . The system of claim 12 , wherein the metallic segment comprises a coil or a braid.

15 . The system of claim 1 , wherein the flexible elongate body further comprises an inner liner.

16 . The system of claim 1 , wherein the flexible elongate body comprises no inner liner, and wherein the polymer of the intermediate wall segment comprises a lubricious additive incorporated within the polymer of the intermediate wall segment.

17 . The system of claim 1 , wherein the flexible elongate body comprises no inner liner, and wherein the polymer of the unreinforced wall segment comprises a lubricious additive incorporated within the polymer of the unreinforced wall segment.

18 . The system of claim 1 , wherein the first outer diameter of the tapered portion is 0.080 inch to 0.082 inch.

19 . The system of claim 1 , wherein the first outer diameter of the tapered portion is 0.062 inch to about 0.080 inch.

20 . The system of claim 1 , wherein a difference between the first outer diameter and an inner diameter of the catheter lumen is no more than about 0.010 inch.

Assignees

• Route 92 Medical Inc

Inventors

• Chou Tony M
• Wilson Scott D

Classifications

• A61M2205/584

  having a color code · CPC title

• A61M2025/09125

  Device for locking a guide wire in a fixed position with respect to the catheter or the human body · CPC title

• A61M2025/0681

  Systems with catheter and outer tubing, e.g. sheath, sleeve or guide tube · CPC title

• A61M1/87

  Details of the aspiration tip, not otherwise provided for · CPC title

• A61B2017/22069

  Immobilising; Stabilising · CPC title