Apparatus for the registration of drops in an infusion device

摘要

An apparatus for the registration of drops in an infusion device has a drip chamber from which fluid is supplied from a reservoir through a tube to a patient, with a drop sensor disposed in the region of the drip chamber. The drop sensor is divided into at least two levels, each level having a processing channel allocated thereto including an amplifier, a comparator and a memory. The outputs of each channel are supplied to a logic unit. As long as signals are supplied by each channel to the logic unit, normal and proper operation is assumed, however, a discriminator unit triggers a fault display or an alarm when a signal from only one channel is present within a predetermined time.