Innovative Wireless Blood Pressure Monitor Developed in Australia

Background on Blood Pressure Abnormalities

Approximately 1.25 billion individuals globally experience blood pressure abnormalities, such as hypertension or hypotension. These conditions are significant risk factors for a variety of health issues. Traditionally, blood pressure is measured using a sphygmomanometer and a stethoscope, methods that can be uncomfortable, particularly for critically ill patients.

Limitations of Traditional Monitoring Methods

Continuous blood pressure monitoring typically requires invasive procedures, such as inserting a needle into an artery, which poses risks of infection and potential limb loss.

New Development at Monash University

Researchers from Monash University in Australia have created a wireless blood pressure monitor capable of continuous tracking without invasive techniques, with findings published in the journal Nature. This innovative device utilizes radar technology for real-time blood pressure measurements.

Study Overview and Methodology

The team aimed to develop a method for continuous blood pressure tracking throughout daily activities. The wireless monitor comprises a radar sensor positioned on the patient’s breastbone, an earlobe sensor, and ECG electrodes on the chest.

The study involved 43 volunteers, each fitted with the wireless monitor alongside a calibrated blood pressure cuff. The experiment consisted of two sessions. In the first session, all participants underwent a series of positions: sitting, standing, and lying down for six minutes each. Throughout this time, the continuous monitor recorded signals from the breastbone and earlobe sensors, along with ECG data.

In the second session, 26 participants were randomly selected to engage in physical activities. They performed handgrip exercises and cycled at varying resistance levels while resting intermittently. Blood pressure measurements were taken every three minutes using the cuffs to compare with the wireless monitor’s readings.

Results and Accuracy of the Device

The study found that the wireless blood pressure monitor demonstrated a 93% accuracy during the first session and an 83% accuracy in the second session.

Expert Insights

Mehmet Yet, one of the researchers, commented, “The CWR sensors present a low-power, continuous, and potentially wearable system with minimal body contact to monitor aortic valve activities directly. Doctors would be interested to see such information for long-term better diagnosis of their patients. Results of this study demonstrate the potential superiority of CWR-based PEP extraction for various medical monitoring applications, including blood pressure monitoring.”

Further Reading

– How to live healthily and reduce high blood pressure
– Why measure blood pressure in both arms?
– Spices and herbs not only add flavor to dishes but may also help reduce blood pressure, a study says
– How common is high blood pressure in children?
– What is the Relationship between Alcohol and Blood Pressure?
– Could blood pressure drugs have potential as a medication for Alzheimer’s disease?

Reference

Pour Ebrahim, M., Heydari, F., Wu, T. et al. Blood Pressure Estimation Using On-body Continuous Wave Radar and Photoplethysmogram in Various Posture and Exercise Conditions. Sci Rep 9, 16346 (2019). https://doi.org/10.1038/s41598-019-52710-8

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