According to a research report published Tuesday in the Journal, BP monitoring could become as easy as taking a selfie with a smartphone camera.
The study, published in the American Heart Association Journal of Circulation: Cardiovascular Imaging, showed that a device on a smartphone can measure blood pressure by detecting blood flow changes in facial videos, enabling contactless and non-invasive blood pressure monitoring.
Researchers at the University of Toronto measured the blood flow of 1,328 Canadian and Chinese adults by capturing two-minute videos using iPhones equipped with transdermal optical imaging software.
The light penetrates into the outer layer of their skin, which allows digital optical sensors in smartphones to visualize and take blood flow patterns, according to the study.
They compared smartphone-captured systolic and diastolic pressure measurement with a traditional cuff-based device with blood pressure readings. On average, transdermal optical imaging predicts systolic blood pressure with approximately 95 percent accuracy and diastolic blood pressure with approximately 96 percent accuracy in BP monitoring.
Limitations of the study were that participants’ faces would be videoed in a well-controlled environment with steady lighting and that neither skin tones were too dark or fair.
Researchers are working to reduce the video length from two minutes to 30 seconds to make the technology more user-friendly BP monitoring.