Method of monitoring the operationality of a flow cut-off member and flow arresting system, for an extracorporeal fluid circuit
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United States of America Patent
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May 3, 2011
Grant Date -
Sep 25, 2008
app pub date -
May 21, 2008
filing date -
Feb 22, 2002
priority date (Note) -
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Abstract
A description is given of a method of monitoring the operationality of a flow cut-off member for an extracorporeal fluid circuit. Also described is a system for arresting the flow of blood that implements this monitoring method. The system has a flow cut-off member active on a radially deformable length of tube forming part of the circuit, and a unit capable of causing a movement of a movable portion of the cut-off member towards a closed condition. The system detects when the movable portion passes through a first predetermined position and determines the value assumed by a dynamic parameter associated with the motion of the movable portion at the first predetermined position. The system further checks that this value is within a predetermined criterion of acceptability. Lastly, a blood treatment appliance is described that implements the described method and system.
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