Smartphone-Based Blood Pressure Measurement Using Transdermal Optical Imaging Technology

Circulation. Cardiovascular Imaging
Hong LuoZhong-Ping Feng

Abstract

Cuff-based blood pressure measurement lacks comfort and convenience. Here, we examined whether blood pressure can be determined in a contactless manner using a novel smartphone-based technology called transdermal optical imaging. This technology processes imperceptible facial blood flow changes from videos captured with a smartphone camera and uses advanced machine learning to determine blood pressure from the captured signal. We enrolled 1328 normotensive adults in our study. We used an advanced machine learning algorithm to create computational models that predict reference systolic, diastolic, and pulse pressure from facial blood flow data. We used 70% of our data set to train these models and 15% of our data set to test them. The remaining 15% of the sample was used to validate model performance. We found that our models predicted blood pressure with a measurement bias±SD of 0.39±7.30 mm Hg for systolic pressure, -0.20±6.00 mm Hg for diastolic pressure, and 0.52±6.42 mm Hg for pulse pressure, respectively. Our results in normotensive adults fall within 5±8 mm Hg of reference measurements. Future work will determine whether these models meet the clinically accepted accuracy threshold of 5±8 mm Hg when tested on a full range ...Continue Reading

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Citations

Nov 7, 2019·Journal of Clinical Medicine·Gabriel ChanMohamed Elgendi
Jul 21, 2020·Circulation. Cardiovascular Quality and Outcomes·John J WarnerUNKNOWN American Heart Association Partnering with Regulators Learning Collaborative*
Aug 7, 2019·Circulation. Cardiovascular Imaging·Ramakrishna Mukkamala
Oct 11, 2019·Current Hypertension Reports·Andrew Barszczyk, Kang Lee
Jul 19, 2020·Clinical Journal of the American Society of Nephrology : CJASN·Jay A PanditDaniel Batlle
Jul 15, 2020·Herzschrittmachertherapie & Elektrophysiologie·Jakob Ledwoch, David Duncker
Mar 12, 2020·Journal of Clinical Medicine·Manish HosaneeMohamed Elgendi
Oct 13, 2020·Advanced Materials Technologies·Siddarth ArumugamSamuel K Sia
Jan 27, 2021·Clinical Hypertension·Hae Young LeeUNKNOWN Korean Society of Hypertension
Feb 4, 2021·The Journal of Clinical Hypertension·Kelvin TsoiUNKNOWN HOPE Asia Network
Jul 10, 2021·Journal of Clinical Monitoring and Computing·Chi PhamFrances Chung
Aug 17, 2021·Anesthesiology Clinics·Frederic Michard

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