A FLOW CONTROL SYSTEM COMPRISING A GRAVITY FEED INFUSION DEVICE FOR INTRAVENOUS FLUIDS AND METHOD OF ITS OPERATION

摘要

The invention relates to a flow controlling system for a gravity feed infusion device for intravenous fluids, wherein the system comprises: a sensor configured to be attached to a drip chamber of the infusion device and configured to register any drops generated in the drip chamber. The system also consists of an infusion tube restrictor for controlling the size of a restriction of an infusion tube; a controller configured to control the' infusion tube restrictor, wherein the controller is configured to provide for a series of consecutive timeslots, to set open the tube restrictor in a first timeslot, to calculate the cumulative number of drops registered by the sensor and to close the tube restrictor in this timeslot. Furthermore, the system is configured to set open again the tube restrictor in a second timeslot, wherein the controller is configured to use the number of registered drops in the first timeslot as a parameter for controlling the length of the second timeslot or the number of desired drops in the second time slot.