Headphones to diagnose brain injury, infection

Robert Marchbanks and Tony Birch at University Hospital Southampton have developed a noninvasive  brain pressure test to detect head injuries and infections.

The cerebral and cochlear fluid pressure (CCFP) test uses patient headphones  to measure ICP via a channel which links the inner ear with the brain. As fluids in the ear and brain are connected, a change in pressure in the brain is reflected by a pressure change in the ear.  Changes to ICP occur when the brain swells due to injury or infection and prevents blood flow.

ICP is currently measured by drilling a hole through the skull to implant a pressure probe, or by lumbar puncture, where a spinal cord fluid sample is removed with a needle.

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