In the last years, the demographic changes in European societies became a global phenomenon, resulted from lower fertility rates and higher life expectancy [1]. All countries in Europe are experiencing an increasing health care demand because of an ageing of their population and an increasing number of people with chronic diseases. Also, chronic diseases represent the major causes of death all over the world. Patient monitoring refers to the continuous observation of repeating events of physiologic function to guide therapy or to monitor the effectiveness of interventions. Historically, these medical instruments are designed to be used by highly trained personnel, in the intensive care units and operating rooms of hospitals, and thus such instruments are not applicable for home monitoring.