Researchers use graphene sensors in silicon to monitor blood pressure
The device works by sending an electric current toskin and then analyzes the body's response, known as bioimpedance. As scientists explain, there is a correlation between this indicator and changes in blood pressure. It is associated with changes in blood volume.
To accurately determine the relationship between these indicators, the researchers developed a machine learning model that analyzes the collected data and determines blood pressure.
In a study published in the journal NatureNanotechnology, scientists show that the measurement accuracy for the new device is 0.2 ± 4.5 mmHg. Art. for diastolic pressure and 0.2 ± 5.8 mm Hg. Art. for systolic pressure. This corresponds to the most accurate class A instruments.
Blood pressure is one of the mostimportant indicators of heart health, but difficult to measure frequently and reliably outside of a clinical setting. For many years, the gold standard has been a device with inflatable cuffs. But its disadvantage is that it is cumbersome and difficult to regularly collect readings in non-standard conditions, for example, during physical activity or during sleep.
Most smart wearables alsooffer pressure measurement functions. But insufficient fastening density leads to a high measurement error. A graphene tattoo, the researchers note, is devoid of these problems and can effectively collect data for at least five hours.
Read more
Quantum simulator showed the division of an electron into parts in one-dimensional space
Physicists have created an atomic laser that can work forever
Two planets found not far from Earth that are very similar to ours