System and methods for controlling retrograde carotid arterial blood flow
First Claim
1. A retrograde flow system for treating an artery, comprising:
- an arterial access device adapted to be introduced into an artery and receive blood flow from the artery;
a shunt fluidly connected to the arterial access device, wherein the shunt provides a pathway for blood to flow from the arterial access device to a return site;
a flow control assembly coupled to the shunt and adapted to regulate blood flow through the shunt between at least a first blood flow state and at least a second blood flow state, wherein the flow control assembly includes a flow resistance element adapted to adjust a resistance of blood flow through the shunt, and wherein the flow resistance element comprises two or more parallel flow paths of the shunt and a valve to open or close one or more of the flow paths to direct blood flow selectively through one or more of the flow paths, and wherein the parallel flow paths include a main flow path and a secondary flow path that has a higher resistance to blood flow than the main flow path; and
a shut-off valve assembly that regulates fluid flow through the shunt, wherein the shut-off valve assembly automatically blocks fluid flow through the shunt in response to injection of a fluid into the arterial access device.
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Accused Products
Abstract
A retrograde flow system is configured for treating an artery. The system includes an arterial access device adapted to be introduced into an artery and receive blood flow from the artery. A shunt fluidly is connected to the arterial access device, wherein the shunt provides a pathway for blood to flow from the arterial access device to a return site. A flow control assembly is coupled to the shunt and is adapted to regulate blood flow through the shunt between at least a first blood flow state and at least a second blood flow state. A shut-off valve assembly automatically blocks fluid flow through the shunt in response to injection of the fluid into the arterial access device.
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Citations
28 Claims
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1. A retrograde flow system for treating an artery, comprising:
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an arterial access device adapted to be introduced into an artery and receive blood flow from the artery; a shunt fluidly connected to the arterial access device, wherein the shunt provides a pathway for blood to flow from the arterial access device to a return site; a flow control assembly coupled to the shunt and adapted to regulate blood flow through the shunt between at least a first blood flow state and at least a second blood flow state, wherein the flow control assembly includes a flow resistance element adapted to adjust a resistance of blood flow through the shunt, and wherein the flow resistance element comprises two or more parallel flow paths of the shunt and a valve to open or close one or more of the flow paths to direct blood flow selectively through one or more of the flow paths, and wherein the parallel flow paths include a main flow path and a secondary flow path that has a higher resistance to blood flow than the main flow path; and a shut-off valve assembly that regulates fluid flow through the shunt, wherein the shut-off valve assembly automatically blocks fluid flow through the shunt in response to injection of a fluid into the arterial access device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for accessing and treating the carotid or cerebral artery, comprising:
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forming a penetration in a wall of a carotid artery; positioning an access sheath through the penetration; blocking blood flow from the common carotid artery past the sheath; allowing retrograde blood flow along a retrograde flow pathway from the carotid artery into the sheath and from the sheath via a flow path to a return site; adjusting the state of retrograde blood flow through the flow path, wherein adjusting comprises adjusting flow resistance from the arterial access sheath to a return site by causing blood to flow through a flow resistance element coupled to the flow path, wherein the flow resistance element comprises two or more parallel flow paths of the flow path and a valve to open or close one or more of the flow paths to selectively direct blood flow through one or more of the flow paths; and injecting a fluid into the carotid artery via the access sheath, wherein injection of the fluid automatically causes flow to be blocked through the retrograde flow pathway. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification