During simultaneous drug delivery to neonates via IV-systems undesired and harmful dosing errors can occur, by a combination of low flow levels and relatively high medicine concentrations. In this proposal the application of a multi-parameter chip is investigated for locally determining the composition of the IV fluid just before it is introduced into the patient, is studied. The chip measures the composition by analysis of the physical parameters of the IV fluid. By comparing these properties with the expected values based on the setpoint of the pumps, drug administration can be carried out with higher confidence, yielding a better clinical result.