Blood Pressure Measurement Using a Gaussian Curve Fitting Algorithm

Abstract

In this paper, blood pressure measurement is done non-invasively and by a corrected oscillometric method. First, the cuff is inflated to the desired value, and then by opening a valve the air pressure in the cuff decreases almost linearly between 24mmHg/s. To achieve the oscillometric graph, the output signal during deflation is band-pass filtered and then amplified. To remove different artifacts and noises from the oscillogram, a correction curve based on Gaussian distribution is fitted on it. Then using fixed coefficients with the help of Mean Arterial Pressure (MAP), the values of systolic and diastolic pressure are calculated. The values of R Squared obtained for systolic and diastolic pressures before fitting the curve are-0.178 and 0.389, and after fitting are 0.625 and-0.012, respectively.