Arteriovenous shunt having a flow control mechanism
First Claim
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1. An arteriovenous shunt assembly comprising:
- a tubular shunt having a fluid passageway between open first end second ends thereof;
a flow control mechanism that includes a pull wire having a distal portion disposed circumferentially around the tubular shunt in at least one loop; and
a subcutaneous control port containing ends of the pull wire and an opening for percutaneous access to the ends of the pull wires, wherein pulling on at least one of the ends of the pull wire causes the pull wire to selectively tighten around the tubular shunt and radially constrict the tubular shunt, thereby reducing the rate of blood flow permitted through the fluid passageway of the tubular shunt.
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Abstract
An arteriovenous shunt assembly including a shunt and a pull wire operated flow control mechanism. The shunt has a tubular body that defines a fluid passageway between a first end and a second end thereof The pull wire mechanism includes a portion disposed around the tubular shunt in at least one loop. The at least one loop may be selectively tightened or loosened remotely from the shunt to regulate the rate of blood flow through the tubular shunt.
29 Citations
15 Claims
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1. An arteriovenous shunt assembly comprising:
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a tubular shunt having a fluid passageway between open first end second ends thereof; a flow control mechanism that includes a pull wire having a distal portion disposed circumferentially around the tubular shunt in at least one loop; and a subcutaneous control port containing ends of the pull wire and an opening for percutaneous access to the ends of the pull wires, wherein pulling on at least one of the ends of the pull wire causes the pull wire to selectively tighten around the tubular shunt and radially constrict the tubular shunt, thereby reducing the rate of blood flow permitted through the fluid passageway of the tubular shunt. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for forming a connection between a first body vessel and a second body vessel for controlling blood flow through the connection, the method comprising the steps of:
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intravascularly delivering a shunt assembly in its collapsed configuration to a tissue tract formed between the first vessel and the second vessel, the shunt assembly including a tubular shunt that defines a fluid passageway between a first end and a second end thereof and a flow control mechanism coupled to the shunt, wherein the flow control mechanism includes a continuous pull wire having a distal portion disposed around the tubular shunt in at least one loop; positioning the tubular shunt through the tissue tract; deploying the tubular shunt to an expanded configuration; pulling on an end of the pull wire to tighten the at least one loop of the distal portion to radially constrict the tubular shunt and thereby reduce the rate of blood flow permitted through the fluid passageway of the tubular shunt;
wherein the step of pulling on an end of the pull wire includes forming a small incision through the patient'"'"'s skin in order to access ends of the wire; and
pulling on at least one of the ends of the wire. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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Specification