Key result
Photoplethysmography-based blood pressure estimation using double-peak analysis yielded errors of approximately 23 mmHg for systolic and ±4 mmHg for diastolic pressure.
Why the study?
Long-term invasive continuous blood pressure monitoring remains challenging, raising interest in whether blood pressure can be continuously measured by PPG signals alone.
Can blood pressure be accurately measured continuously by PPG signals alone compared to invasive blood pressure waveforms?
Population
524 sets of data (263 waveforms with double peaks and 261 with a single peak) from PhysioNet MIMIC-II database
Comparison
PPG-derived systolic and diastolic blood pressure vs actual blood pressures from invasive blood pressure waveforms
Design
Algorithm development and validation study
Authors
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May support PPG-only BP estimation in wearables; leaves open validation for clinical continuous monitoring.
Can blood pressure be accurately measured continuously by PPG signals alone compared to invasive blood pressure waveforms?
PPG-based continuous blood pressure estimation shows promise for diastolic pressure but currently has significant error margins for systolic pressure, particularly when using single-peak waveforms.
Ku et al. (2022) studied this question. Photoplethysmography (PPG) signal analysis vs. Invasive blood pressure waveforms was evaluated on Systolic and diastolic blood pressure estimation error. Photoplethysmography-based blood pressure estimation using double-peak analysis yielded errors of approximately 23 mmHg for systolic and ±4 mmHg for diastolic pressure.
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