Figure 1
From: Norepinephrine weaning in septic shock patients by closed loop control based on fuzzy logic
Scheme for a fuzzy logic based norepinephrine controller. The monitor was connected to a computer that converted the mean arterial pressure (MAP) and norepinephrine infusion rate into fuzzy datasets and automatically calculated the required change in rate of infusion. MAP level and MAP variation (ΔMAP) – the variables to be controlled – are the outputs of the controlled system, whereas the norepinephrine infusion rate is the input to be adjusted to reach the desired MAP value. The infusion rate changed automatically every 7 minutes after analysis of the MAP and the ΔMAP.