  In this paper we present an electronic system to perform a non-invasive
measurement of the blood pressure based on the oscillometric method, which does
not suffer from the limitations of the well-known auscultatory one. Moreover
the proposed system is able to evaluate both the systolic and diastolic blood
pressure values and makes use of a microcontroller and a Sallen-Key active
filter. With reference to other similar devices, a great improvement of our
measurement system is achieved since it performs the transmission of the
systolic and diastolic pressure values to a remote computer. This aspect is
very important when the simultaneous monitoring of multi-patients is required.
The proposed system, prototyped and tested at the Electron Devices Laboratory
(Electrical and Information Engineering Department) of Polytechnic University
of Bari, Italy, is characterized by originality, by plainness of use and by a
very high level of automation (so called intelligent system).
