Implementation and Validation of a Novel Noninvasive blood Pressure Measurement Algorithm Based on Oscillometric Method with Obtaining International Hypertension Standards

Figures

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  Figure 1. (a) Noninvasive blood pressure system block diagram. (b) Designed hardware for measuring noninvasive blood pressure

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  Figure 2. Diagram of noninvasive blood pressure measurement algorithm. This algorithm starts after cuff inflation. The left side is the way of measurement in each step and the right side is after the end of the measurement and obtaining SBP and DBP

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  Figure 3. Finding best threshold for measuring height of each sample and true pulses in an accurate and ideal positive slope based on pulse morphology

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  Figure 4. The beginning and end of each positive slope are marked with a red circle, which can be used to obtain the height of each pulse

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  Figure 5. The size of the pulses obtained at each stage of the blood pressure measurement

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  Figure 6. Fitting the linear curve to the obtained data from the peaks

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  Figure 7. Fitting the quadratic curve to the obtained data from the peaks

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  Figure 8. Fitting the cubic curve to the obtained data from the peaks

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  Figure 9. Data collection

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  Figure 10. Blood pressure measurement method to validate the proposed algorithm

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  Figure 11. Bland-Altman for diastolic pressure with linear model estimation, 100% was considered within 5 mmHg of difference

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  Figure 12. Bland-Altman for systolic pressure with linear model estimation, 80% was considered within 5 mmHg of difference