University of South Australia engineers have designed a system to remotely measure blood pressure by filming a person’s forehead and extracting cardiac signals using artificial intelligence algorithms.
Using the same remote-health technology they pioneered to monitor vital health signs from a distance, engineers from the University of South Australia and Baghdad’s Middle Technical University have designed a non-contact system to accurately measure systolic and diastolic pressure.
It could replace the existing uncomfortable and cumbersome method of strapping an inflatable cuff to a patient’s arm or wrist, the researchers claim.
In a new paper published in Inventions, the researchers describe the technique, which involves filming a person from a short distance for 10 seconds and extracting cardiac signals from two regions in the forehead, using artificial intelligence algorithms.
The systolic and diastolic readings were around 90 per cent accurate, compared to the existing instrument (a digital sphygmomanometer) used to measure blood pressure, that is itself subject to errors.
Experiments were performed on 25 people with different skin tones and under changing light conditions, overcoming the limitations reported in previous studies.
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