Cerebral aneurysm: a wireless sensor implanted in the vessels to monitor healing

Monitoring changes in cerebral aneurysms is essential. Scientists are working on the development of a wireless sensor that, implanted in the vessels of the brain, would monitor blood flow.

To follow the evolution of cerebral aneurysms, it is now necessary to perform regular angiograms which, because of the use of contrast media, can have harmful side effects. Hence the idea of ​​placing a sensor in a blood vessel allowing more frequent evaluations without having to use imaging dyes.

It is this device that researchers at the Institute of Technology of Georgia are finalizing the development that comes to present the journal Advanced Science.

Determine the degree of healing of the aneurysm

"With this system, we could measure the blood flow into the aneurysmal sac to determine the degree of healing of the aneurysm and alert doctors to changes in blood flow," said Woom-Hang Yeo, assistant professor. at the Georgia Tech School of Mechanical Engineering.

When inserted with a catheter, the sensor would use inductive signal coupling to enable wireless detection of the hemodynamics of a cerebral aneurysm.

The sensor which includes a coil for sensing the electromagnetic energy transmitted by another coil located outside the body would be wound around a stent or a flux deflector whose diameter must be less than 2 or 3 millimeters for able to fit into the blood vessels.

"React to the smallest changes in blood flow"

With such a device implanted in meat to simulate brain tissue, Yeo and his collaborators managed to measure blood flow. "We have made the sensor very thin and deformable so that it can respond to the smallest changes in blood flow," says the researcher.

The next phase of the aneurysm sensor will be to check its ability to measure the blood pressure in the vessels as well as the flow. "This would allow our device to be used for other applications, such as intracranial pressure measurements," says Woom-Hang Yeo, who states that there are "many opportunities to integrate this detection mechanism into membranes. ultra-thin implantable in the body.

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