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US08821430B2 Flow control method and device 有权
流量控制方法和装置

Flow control method and device
Abstract:
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.
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