Heart sensor helps ease the pressure
9 July 2008
High blood pressure is a rising problem. Now technology that measures tyre pressure in cars is revving up as a wireless solution for managing this condition. Antenna gets to the heart of the matter...
Stress, obesity and smoking lead to high blood pressure. Left untreated it can cause heart attacks, strokes and kidney disease.
Image: Medi-Mation / Science Photo Library
Sensors that measure pressure in car tyres inspired researchers at Imperial College to create a tiny device to monitor pressure in the heart.
High blood pressure in the heart is a warning sign of imminent failure.
High blood pressure in the heart is a warning sign of imminent failure.
Image: Elnur / Dreamstime
The tiny sensor vibrates according to the pressure inside the heart. The sensor uses radio waves to send the information to a device in the patient's pocket. Then blood pressure is easily read off the screen of the device.
The sensor is smaller than a five pence piece.
Image: Imperial College London
A wireless system has the advantage of continuous monitoring. Doctors can access it remotely using a mobile phone or the internet. And it can automatically send out an alarm if blood pressure hits a critical level.
'Currently, measuring pressure in a patient's heart involves inserting a tube, which is uncomfortable and not very accurate. Our device is placed inside the heart so will be more accurate and much more pleasant for the patient.' Chris Toumazou, medical electronics expert, Imperial College London.
The heart sensor will provide patients and doctors with continuous wireless measurements.
Image: Imperial College London
Has anyone been fitted with a heart sensor yet?
So far the team have successfully implanted the device into a live pig's heart. They are about to carry out some more animal tests. And human trials are scheduled for 2009.
Image: Imperial College London
The Imperial College team are excited by how an even smaller sensor could be used to check blood pressure.
'This device has the potential to revolutionise the measurement of blood pressure. It could be modified to sit in a vein in the arm or even on the surface of the skin. This would allow people to continuously monitor their blood pressure and react by changing their behaviour.' Chris Toumazou.
Chris Toumazou, medical electronics expert, Imperial College London.
Image: Imperial College London
'Any research that helps to detect and control high blood pressure is welcome. This device may have a role in helping people suffering severe heart problems. And, as technology develops, it could help people manage their high blood pressure.' Graham MacGregor, Chairman, Blood Pressure Association.
Graham MacGregor, Chairman, Blood Pressure Association.
Image: Blood Pressure Association