Traditional methods of measuring bloodpressure using stationary devices demonstrate high accuracy, but can not provide constant monitoring of the patient's condition. Meanwhile, monitoring the pressure of people suffering from hypertension in real time can provide timely responses to pressure surges and even save the patient.
Experts fromMonash University (Australia), which created compact wearable devices to constantly monitor pressure readings. The device kit includes a continuous wave radar (CWR), which is a sticker on the patient’s chest and a photoplethysmographic sensor-clip (photoplethysmogram sensor; PPG), mounted on the patient’s left ear earlobe.
Body spaced sensors measure the difference inthe time between the contraction of the heart muscle and the blood reaching the left earlobe of a person. This decision does not cause discomfort to the patient, but allows you to constantly monitor the magnitude of the pressure throughout the day.
Testing of the device took place at varioustypes of load: patients lying on their backs, sitting or exercising on a bicycle simulator. In total, 43 volunteers aged 40 to 65 took part in the experiment. Comparison with the traditional method of pressure control gave fairly high accuracy rates. So, when measuring pressure at rest, the accuracy was 93%, and during dynamic exercises - 83%. Currently, specialists are working to further improve the accuracy of measuring instruments.
Now there are no devices that allowconstantly monitor the patient’s blood pressure and provide emergency assistance depending on the change in this indicator. According to the developers, the new technique using portable compact sensors will not limit the patient in his daily activities, but he will provide doctors with valuable data on changes in the patient's condition. The use of compact wearable devices will provide a more accurate diagnosis and allow the development of long-term treatment methods.