Wednesday, September 17, 2014

Wrist sensor to measure BP

Posted On : June 10,2013

A team of researchers from the University College London have developed a new device that can give a better measure of blood pressure – a sensor that is worn on the wrist like a watch.

The device, the researchers said, could improve how blood pressure is measured.

The device came with a computer programme that used when strapped to the wrist used the "pulse wave" to work out the pressure in the heart.

Normally blood pressure is measured in the arteries in the arm, but the pressure at the heart might be a better predictor of future health problems.

In fact, the study, published in the journal Hypertension, showed that the measurements in the arm did not reflect the true changes in blood pressure at night indicating that using the pulse method would give a better measurement.

The researchers conducted a trial of their sensor, which contains a mini-plunger that moves up and down as blood pulses past with every heartbeat.

“It was remarkably accurate," said Prof Bryan Williams, the director of the NIHR University College London Hospitals Biomedical Research Centre.

"We know the pressure when someone is asleep is a strong predictor of heart disease. This [the device] almost certainly gives a better measure than blood pressure in the arm.

"This is not mainstream, but in the future you could see people having their central blood pressure measured instead of in the arm."