Background: This article presents a novel technique relating to the advancement of non-invasive cuff less blood pressure measurement using the PhotoPlethysmoGram (PPG) signals. The morphological characteristics of PPG signal have a strong correlation with the cardiovascular parameters and blood flow. The exact distinguishing feature of the PhotoPlethysmoGram signals is such as height as well as width of the pulse has considered into count for the measurement of blood pressure. In comparison to the existing measurement system like inflatable cuff and electrocardiogram units, this system only requires a pulse plethysomogram unit. The traditional blood pressure unit has many disadvantages such as expert personal, depends on the ability of the person to detect the korotkoff sounds, provides discomfort to the user and is not suitable for long time measurements. Moreover, this is very perceptive to artifacts owing to the existence of cuff. The PAT, PTT of the existing non-invasive techniques need many number of factors for estimation of blood pressure and are highly complex.
Results: This method has intended for estimating the cardiovascular parameter of a non-invasive cuff-less blood pressure by utilizing the method of linear regression from PhotoPlethysmoGraphy signal. The real data has obtained using the GUI LabVIEW and further mathematical modelling of the obtained signal has performed by analysis using MATLAB tools. The obtained results had revealed that this technique is simple, non-invasive, cost-effective and consistent for estimating the arterial pulse signal in connection to variation in the amplitude of the waves. The exact distinguished feature of the PhotoPlethysmoGraphy signals like height and width of the pulse, which had considered into the count up for the measurement of blood pressure. The results obtained have been cross validating during the existing blood pressure monitors.
Conclusions: The simulated output reveals the height of the pulse (systolic height) is inversely proportional to the systolic blood pressure as well as it rises for increasing cardiac output, however it occurs in less span of time. The pulse width and area is directly proportional to the systolic blood pressure. Our simulation result shows the specific relation between PPG and blood pressure. Error percentages as per the calculation among the extracted features have been less for inflection height ranging from ±10 to a min of ± 2.