IP Library › Granted Patent US 12,721,979
Granted Patent B2
US 12,721,979 · App. 14/227,585 · Granted Sep 1, 2026

Methods and systems for establishing retrograde carotid arterial blood flow

Inventors: Gregory M. Hyde (Sunnyvale, CA); Marlon Moreno (Sunnyvale, CA); Stewart Kume (Sunnyvale, CA)
Assignee: BOSTON SCIENTIFIC SCIMED, INC.
A61M27/002A61M1/3655
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Quick Facts
Patent No.
US 12,721,979
App. No.
14/227,585
Granted
Sep 1, 2026
Kind
B2
Abstract

Devices and methods establish and facilitate retrograde or reverse flow blood circulation in the region of the carotid artery bifurcation in order to limit or prevent the release of emboli into the cerebral vasculature such as into the internal carotid artery. The methods are particularly useful for interventional procedures performed through a transcervical approach or transfemoral into the common carotid artery.

Claims (20)

1 . A device for use in accessing and treating a carotid artery, said device comprising:

an arterial access sheath having a distal section with a distal end adapted to be introduced into the carotid artery, a proximal end, and a lumen extending between the distal and proximal ends;

a fluid flow shunt fluidly coupled to the arterial access and configured to receive blood flow from the sheath, the shunt attached to a single housing wherein the single housing contains only a blood filter and a one-way check valve positioned immediately downstream of the blood filter within the single housing: and

a stopper member disposed along an outer surface of the arterial access sheath, the stopper member has a pre-shaped configuration that includes a first bend and a second bend;

wherein the first bend and the second bend are arranged to orient an angle of insertion of the arterial access sheath and are configured for orienting the insertion of the arterial access into the carotid artery;

wherein the stopper member has a stiffness greater than the arterial access sheath such that when the stopper member is disposed along the arterial access sheath, the arterial access sheath is shifted to a bent configuration corresponding to the pre-shaped configuration of the stopper member; and

wherein the stopper member limits insertion of the sheath into the carotid artery to no more than a portion of the length of a distal-most portion of the distal sheath.

2 . A device as in claim 1 , wherein the stopper member is at least partially made of a deformable material.

3 . A device as in claim 1 , wherein the stopper member limits insertion of the sheath into the carotid artery to a range of 2 cm to 2.5 cm.

4 . A device as in claim 1 , wherein the stopper member, when in the coupled state, covers a portion of a distal section of the sheath such that a portion of the distal section of the sheath is covered by the stopper member and a portion of the distal section of the sheath is exposed when the stopper member is coupled to the sheath, wherein the stopper member, when coupled to the sheath, limits the exposed portion to being inserted into the carotid artery.

5 . A device as in claim 1 , wherein the stopper member has a greater stiffness than the arterial access sheath such that the arterial access sheath takes on a shape or contour that conforms to the shape of contour of the stopper member when the stopper member is in the coupled state.

6 . A device as in claim 1 , wherein the multiple bends are located external to the carotid artery when the arterial access sheath is introduced into the carotid artery.

7 . A device for use in accessing and treating a carotid artery, said device comprising:

an arterial access sheath having a distal section with a distal end adapted to be introduced into the carotid artery, a proximal end, and a lumen extending between the distal and proximal ends;

a fluid flow shunt fluidly coupled to the arterial access and configured to receive blood flow from the arterial access sheath, the shunt attached to a single housing wherein the single housing contains only a blood filter and a one-way check valve positioned immediately downstream of the blood filter within the single housing;

a stopper member;

wherein the stopper member is configured to remain outside the skin of a patient;

wherein the stopper member has a pre-formed shape having a first pre-formed bend and a second pre-formed bend, wherein the stopper member is configured to be positioned over at least a portion of the distal section of the arterial access sheath along an outer surface of the arterial access sheath;

wherein the stopper member is configured to bias the arterial access sheath into a bent configuration corresponding to the pre-shaped shape of the stopper member when positioned over the arterial access sheath; and

wherein, when the stopper member is positioned over the arterial access sheath, the stopper member limits insertion of the arterial access sheath into the carotid artery to no more than a portion of the length of a distal-most portion of the arterial access sheath.

Assignments (6)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 28, 2025
From: SILK ROAD MEDICAL, INC.
To: BOSTON SCIENTIFIC SCIMED, INC.
Reel/Frame 070671/0426 →
RELEASE OF SECURITY INTEREST Recorded Sep 17, 2024
From: OXFORD FINANCE, LLC
To: SILK ROAD MEDICAL, INC.
Reel/Frame 068979/0196 →
SECURITY INTEREST Recorded Jul 11, 2023
From: SILK ROAD MEDICAL, INC.
To: OXFORD FINANCE LLC
Reel/Frame 064252/0197 →
RELEASE OF SECURITY INTEREST Recorded Oct 29, 2020
From: CRG PARTNERS III L.P.; CRG PARTNERS III - PARALLEL FUND "A" L.P.; CRG PARTNERS III - PARALLEL FUND "B" (CAYMAN) L.P.; CRG PARTNERS III (CAYMAN) L.P.
To: SILK ROAD MEDICAL, INC.
Reel/Frame 054225/0451 →
SECURITY INTEREST Recorded Oct 13, 2015
From: SILK ROAD MEDICAL, INC.
To: CRG PARTNERS III L.P.; CRG PARTNERS III - PARALLEL FUND "A" L.P.; CRG PARTNERS III - PARALLEL FUND "B" (CAYMAN) L.P.; CRG PARTNERS III (CAYMAN) L.P.
Reel/Frame 036852/0347 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 23, 2014
From: HYDE, GREGORY M.; MORENO, MARLON; KUME, STEWART
To: SILK ROAD MEDICAL, INC.
Reel/Frame 033801/0137 →
Continuity (3)
Provisional Application 61822803 · May 13, 2013
Provisional Application 61806348 · Mar 28, 2013
Related Publication 20140296769A1 · Oct 2, 2014
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