Blood Pressure Monitor
Pulse Transit Time Calculation
By calculating the time delay between the electrocardiographic signal and the heart sounds, the Pulse Transit Time (PTT), i.e. the time it takes for a pulse wave to travel between two arterial points, can be estimated. There is a relationship between PTT and BP that allows diastolic and systolic values to be obtained continuously and reduces the inconvenience of ambulatory monitoring.
NAS
Neuro Autonomic State Index
By extracting the Heart Rate (HR) and the temporal and frequency features of the Heart Rate Variability (HRV), such as the RMSSD, PNN50 and the ratio between LF and HF, an Adaptive neuro fuzzy inference system (ANFIS) is developed. This model computes the NAS index, allowing the monitoring of the sympathetic-parasympathetic balance of the autonomic nervous system, informing about the probability of response to a noxious stimuli.










