AUTOMATIC SYSTEM WITH PERFUSION PROTECTION AGAINST MALFUNCTION

摘要

A system for performing intravenous perfusions of a treatment liquid propelled by gas under pressure includes a gauge which vents the gas line in the event of excessive gas pressure. In the event of insufficient gas pressure, the gauge actuates a controller for switching a valve to divert the liquid flow from the perfusion implement to a drain, the controller also responding in like manner to gas occlusions sensed by a bubble detector and to a slowdown in the flow rate as measured by a drop counter.