Invasive monitoring is rarely used in children undergoing routine anaesthesia. Therefore the management of fluid therapy and its maintenance depends often on the experience of the anaesthetist. In situations of high volume uptake and during critical surgical procedures haemodynamic state can easily be underestimated and hypovolaemic episodes remain undetected. This article summarises recent developments of less invasive and continuous monitoring techniques available for paediatric use which probably represent a useful addition in optimising the perioperative haemodynamic performance.