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Transdermal optical imaging using smartphones to measure blood pressure


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Blood pressure can be measured accurately by taking a quick video selfie.

Using transdermal optical imaging the blood pressure of 1,328 Canadian and Chinese adults was measured by capturing two-minute videos of their faces on an iPhone.

Results were compared to standard devices used to measure blood pressure.

Transdermal optical imaging works by capitalizing on the translucent nature of facial skin and using the optical sensor on a smartphone.

They were able to measure three types of blood pressure with 95 to 96 percent accuracy.

Nuralogix has developed a smartphone app called Anura.

“From the video captured by the technology, you can see how the blood flows in different parts of the face ... you can get a lot of information,” says Lee, the lead author.

This technology could be expanded to measure other health markers, including blood glucose levels, hemoglobin and cholesterol.

The study was carried out at the University of Toronto and published in the American Heart Association journal Circulation: Cardiovascular Imaging.

Facial video of 2-minutes could measure blood pressure due to translucent skin

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Scientific Journal providing information about cardiovascular health and diesases.


Professor of Applied Psychology and Human Development at University of Toronto


Public research university located in Toronto