Granted Patent B2

US 12,728,229 · App. 18/369,695 · Granted Sep 8, 2026

Inventors: Michi E. Garrison (San Mateo, CA); Tony M. Chou (San Mateo, CA); Scott D. Wilson (San Mateo, CA)

Assignee: Route 92 Medical, Inc.

A61M25/0102A61B17/22A61B17/221A61M1/84A61M5/007A61M25/0043A61M25/0054A61M25/0067A61M25/01A61M25/0108A61M25/0662A61M25/10A61M29/00A61B2017/22038A61B2017/22079A61B2017/2212A61B2217/005A61M2025/0019A61M2025/0042A61M25/0074A61M25/0097A61M2025/0175A61M2025/0681A61M2025/1084A61M2210/0693A61M2210/12

Abstract

Claims (22)

1 . An intravascular access system for facilitation of intraluminal medical procedures within a neurovasculature, the system comprising:

an inner catheter comprising:

a flexible elongate body comprising a single lumen extending from a proximal opening near a proximal end of the flexible elongate body to a single distal opening at a distal end of the flexible elongate body, wherein a length of the flexible elongate body between the proximal opening and the distal opening is sized to position the distal opening within a cerebral artery that is distal to a petrous portion of an internal carotid artery while the proximal opening remains positioned outside a patient's body,

wherein the flexible elongate body comprises a plurality of regions, wherein one of the plurality of regions is a tapered region, wherein a proximal end of the tapered region is connected to a cylindrical region;

at least one marker disposed relative to the tapered region to identify the proximal end of the tapered region; and

an outer catheter comprising:

a catheter lumen extending between a proximal opening and a distal opening at a distal end of the outer catheter, wherein the inner catheter is sized to insert through and be removed entirely from the catheter lumen of the outer catheter, and wherein the tapered region of the flexible elongate body is more flexible than the distal end of the outer catheter; and

at least one locking feature designed to be coupled to the proximal end of the flexible elongate body and coupled to a proximal end of the outer catheter,

wherein, when assembled during advancement through the petrous portion of the internal carotid artery to a treatment site within the cerebral artery, at least a portion of the cylindrical region of the inner catheter is located within the catheter lumen of the outer catheter and at least a portion of the tapered region is located distal to the distal opening of the outer catheter, and the inner catheter is locked with the outer catheter by the at least one locking feature.

2 . The access system of claim 1 , wherein the plurality of regions of the flexible elongate body comprise unreinforced polymer.

3 . The access system of claim 1 , wherein the at least one locking feature is configured to reversibly engage with the outer catheter when the inner catheter and the outer catheter are assembled.

4 . The access system of claim 1 , wherein the at least one locking feature includes a gripping feature.

5 . The access system of claim 1 , wherein the at least one marker is tungsten, platinum or tantalum-impregnated polymer.

6 . The access system of claim 1 , further comprising a guidewire sized to extend through the single distal opening of the flexible elongate body.

7 . The access system of claim 6 , wherein the flexible elongate body forms a smooth transition in flexibility between a flexibility of the distal end of the outer catheter to a flexibility of the guidewire extending outside the single distal opening of the flexible elongate body.

8 . The access system of claim 1 , wherein the at least one locking feature is configured to be placed in a locked configuration to maintain a fixed position between the outer catheter and the inner catheter and in an unlocked configuration to allow for removal of the inner catheter from the catheter lumen.

9 . The access system of claim 1 , wherein the flexible elongate body has an inner diameter of between 0.020″ and about 0.024″ and is sized to receive a guidewire, wherein the guidewire has an outer diameter of between 0.014″ and about 0.018″.

10 . The access system of claim 1 , wherein the tapered region tapers over a length that is between 1.5 cm and 3 cm.

11 . The access system of claim 1 , wherein an outer diameter of the cylindrical region is about 0.003″-0.010″ smaller than an inner diameter of the catheter lumen.

12 . The access system of claim 11 , wherein the inner diameter of the catheter lumen is about 0.040″-0.088″.

13 . The access system of claim 1 , further comprising a guide sheath comprising a working lumen extending between a proximal end region of the guide sheath and a distal end region of the guide sheath, the distal end region of the guide sheath having at least one opening in communication with the working lumen of the guide sheath.

14 . The access system of claim 1 , wherein the outer catheter is an aspiration catheter and the system further comprises an aspiration pump to apply negative pressure through the aspiration catheter upon removal of the inner catheter from the catheter lumen to perform aspiration thrombectomy.

Assignments (1)

Continuity (7)

References Cited (400)