Cuffless, calibration-free miniature sensor delivers results in seconds

Leman Micro Devices and WuQi Technology and Shanghai Minshi Technology

Collaboration between three companies has produced the Minshi key fob-size standalone device that delivers clinically-accurate vital signs measurements, including blood pressure, wirelessly to a smartphone. The standalone device incorporates LMD’s patented V-Sensor, plus a battery and a small Wuqi computer chip which links via Bluetooth to a dedicated app on a smartphone. The circular device measures 5cm in diameter by 2.5cm deep, fits neatly into the palm of the hand and can be attached to a key ring, worn around the neck or carried in a handbag. Entirely portable, convenient, cuff-less and calibration-free, the Minshi measures blood pressure when pressure is gently applied to either side of the device by gently squeezing between thumb and forefinger. Following simple game-style instructions displayed by the dedicated app and pressing on the V-Sensor on the Minshi occludes the arteries in the tip of the index finger – exactly the same as the proven Riva-Rocci method used by a blood pressure cuff. The pressure on the fingertip that balances the pressure of the blood inside the artery is detected optically with the V-Sensor’s pulse oximeter and an absolute blood pressure reading is displayed on the user’s smartphone around 45 seconds later. The Minshi also measures contactless body temperature: the user simply brings the module slowly up to their forehead, the smartphone app pings and displays the temperature reading.

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