Flow control method and device

摘要

An arterio-venous graft (16) is provided with a constriction device (20) near its arterial end. The constriction device (20) is used to reduce the flow through the AV graft under normal conditions and to relieve the constriction when high flow through the AV graft is required, such as for vascular access for hemodialysis.

主权项

1. A device for controlling fluid flow in a vessel that is part of a digestive tract of a human, the device comprising:
a constriction applicator having a first member and a second member in relative positions and spaced apart by a gap that is sized to receive the vessel, wherein the second member is configured to be moved relative to the first member to change a size of the gap and thereby alter the amount of pressure against the vessel to thereby control the fluid flow in the vessel; and a control portion that includes
(1 ) a locking system constructed to lock the position of the second member relative to the first member, and(2 ) a release mechanism to release the locking system, wherein the release mechanism is constructed to displace the locking system away from the second member to release the locking system.