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Korean scientists at the Korea Advanced Institute of Science and Technology (KAIST) have created a wearable piezoelectric blood pressure sensor that is highly sensitive.
As there is a growing interest in healthcare devices for continuous blood pressure monitoring, the team at KAIST developed this sensor to overcome the accuracy constraints of optical sensors used in smart watches.
The wearable piezoelectric blood pressure sensor is made by transferring a highly sensitive, inorganic piezoelectric membrane from bulk sapphire substrates to flexible substrates.
The ultrathin piezoelectric sensors, which are several micrometers thick, conform to the skin to collect accurate blood pressure readings from the subtle pulsation of the blood vessels.
Clinical trials at St. Mary’s Hospital of the Catholic University validated the accuracy of the blood pressure sensor, with errors within ±5 mmHg and a standard deviation under 8 mmHg for both systolic and diastolic blood pressure.
The sensor has been embedded on a watch-type product to enable continuous monitoring of blood pressure, and the team plans to develop a comfortable patch-type sensor to monitor blood pressure during sleep.
A startup company is expected to commercialize these watch and patch-type products soon.
