Accurate Blood-Pressure Measurement at Home

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Accurate Blood-Pressure Measurement at Home

• Á. Jobbágy P. Csordás A. Mersich
• Budapest University of Technology and Economics
• Dept. Measurement and Information Systems

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How to characteriseblood pressure

• statistics of daily variation

statistics of short-term variation
momentary value
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Extra information Pulse wave velocity
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Extra information Pulse wave velocity


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Measurement set-up

• left arm
• tonometer on wrist
• right or left arm
• upper arm cuff
• PPG on index finger
• ECG, spirometer

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reflects changes in systolic pressure
DT
EP
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Effects of breathing
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Effects of breathing
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Correlation between and air flow
DT
EP
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Effect of occlusion by the cuff
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Effect of occlusion by the cuff
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Effect of occlusion by the cuff
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Effect of occlusion by the cuff
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Is the tested person at rest?

• decision can be made based on processing
• HRV,
• PPG,
• DTEP.

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Heart rate young healthy subject 1
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Heart rateyoung healthy subject 2
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A device for home use
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A device for home use
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Extra information rigidity of the brachial
arteries
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Improperly wrapped up cuff