• blood saturation
• calibration
• comparison
• ecg
• heart rate
• hr
• spo2

The aim of this work is to study and test the ability of a prototype of wearable physiological sensor system, to capture vital parameters such as blood oxygen saturation (SpO2), heart rate (HR) and heart rate variability (HRV) extracted from photo-plethysmogram (PPG). Additionally, the reliability of the measures was also investigated by comparing them with two gold standard devices.

The ultimate goal of this wearable systems is to integrate many types of sensors in a single device, power-saved for physiological monitoring which can be used daily.

Particularly, this thesis presents an overview of wearable devices with definitions, design issues requirements, applicative examples and a description of common physiological signals embedded in wearable devices including the PPG signal sensor for SpO2, HR and HRV.