METHODS AND SYSTEMS FOR ESTABLISHING RETROGRADE CAROTID ARTERIAL BLOOD FLOW
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 transcarotid approach or transfemoral into the common carotid artery.
1 . A reverse-flow neuroprotection system, comprising:
an arterial access sheath configured to be introduced into an opening in a carotid artery and receive blood flow from the carotid artery;
an adapter coupled to a proximal end of the arterial access sheath, the adapter comprising a first connector region including a valve and a second connector region;
a shunt tube coupled to the first connector region and extending therefrom;
a flow control assembly coupled to the shunt tube;
a venous return device coupled to the flow control assembly;
a proximal extension coupled to the second connector region; and
wherein the proximal extension has a length sufficient to extend out of a fluoroscopic field during use of the reverse-flow neuroprotection system.
2 . The reverse-flow neuroprotection system of claim 1 , wherein the flow control assembly includes an actuator.
3 . The reverse-flow neuroprotection system of claim 2 , wherein the actuator is configured to shift flow through the flow control assembly between a low flow state and a high flow state.
4 . The reverse-flow neuroprotection system of claim 2 , wherein the actuator is configured to stop flow through the flow control assembly.
5 . The reverse-flow neuroprotection system of claim 1 , wherein the length of the proximal extension is in the range of 12 to 30 centimeters.
6 . The reverse-flow neuroprotection system of claim 1 , wherein the valve includes a side port.
7 . The reverse-flow neuroprotection system of claim 1 , wherein the proximal extension includes a proximal hub with a side port.
8 . A system for treating a vascular region, the system comprising:
an arterial access sheath configured to be introduced into an opening in a carotid artery and receive blood flow from the carotid artery;
a Y-adapter coupled to a proximal end of the arterial access sheath, the Y-adapter comprising a first end region including a valve and a second end region;
a flow shunt line configured to be coupled to the first end region;
a proximal extension configured coupled to the second end region; and
wherein the proximal extension has a length sufficient to extend out of a fluoroscopic field during use of the system.
9 . The system of claim 8 , wherein the flow shunt line is coupled to a flow control assembly.
10 . The system of claim 9 , wherein the flow control assembly includes a filter.
11 . The system of claim 9 , wherein the flow control assembly includes an actuator.
12 . The system of claim 11 , wherein the actuator is configured to shift flow through the flow control assembly between a low flow state and a high flow state.
13 . The system of claim 11 , wherein the actuator is configured to stop flow through the flow control assembly.
14 . The system of claim 8 , wherein the length of the proximal extension is in the range of 12 to 30 centimeters.
15 . A system for treating a vascular region, the system comprising:
an arterial access sheath configured to be introduced into an opening in a carotid artery and receive blood flow from the carotid artery;
an adapter coupled to a proximal end of the arterial access sheath, the adapter comprising a first proximal connector region including a valve and a second proximal connector region;
a flow shunt line coupled to the first proximal connector region;
a proximal extension coupled to the second proximal connector region; and
wherein the proximal extension has a length sufficient to extend out of a fluoroscopic field during use of the system.
16 . The system of claim 15 , wherein the adapter is coupled to the proximal end of the arterial access sheath with a rotatable connector.
17 . The system of claim 15 , wherein the flow shunt line is coupled to a flow control assembly.
18 . The system of claim 17 , wherein the flow control assembly includes a filter.
19 . The system of claim 17 , wherein the flow control assembly includes an actuator and wherein the actuator is configured to shift flow through the flow control assembly between a low flow state and a high flow state.
20 . The system of claim 15 , wherein the length of the proximal extension is in the range of 12 to 30 centimeters.