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Protein found to predict brain injury in children on 'ECMO' life support
Date:11/22/2010

Johns Hopkins Children's Center scientists have discovered that high blood levels of a protein commonly found in the central nervous system can predict brain injury and death in critically ill children on a form of life support called extra-corporeal membrane oxygenation or ECMO.

ECMO, used to temporarily oxygenate the blood of patients whose heart and lungs are too weak or damaged to do so on their own, is most often used as a last resort because it can increase the risk for brain bleeding, brain swelling, stroke and death in some patients.

A detailed report of the Hopkins team's findings is published ahead of print Nov. 4 in the journal Pediatric Critical Care Medicine.

Following 22 ECMO patients, ranging from two days to 9 years of age, the researchers found that those with abnormally high levels of glial fibrillary acidic protein (GFAP) were 13 times more likely to die and 11 times more likely to suffer brain injury than children with normal GFAP levels. GFAP levels are already used as a marker of neurologic damage in adults who suffer strokes and traumatic brain injuries.

Although preliminary, the team's findings may pave the way to a much-needed way to monitor the precarious neurologic status of children on ECMO without using imaging tests like ultrasounds or CT scans. Periodic blood tests measuring GFAP levels may be one such tool to monitor brain function and help ward off brain injury and death, the researchers say.

"A simple, fast and easy-to-use test has been needed to monitor, predict and prevent brain damage in children on ECMO because these children are unresponsive or heavily sedated, and doctors cannot easily gauge their neurologic function," says study lead investigator Melania Bembea, M.D., M.P. H., a pediatric critical-care specialist at Hopkins Children's.

"Early detection of brain injury can help us prevent further harm by changing medication doses and rapidly weaning the
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Contact: Ekaterina Pesheva
epeshev1@jhmi.edu
410-516-4996
Johns Hopkins Medical Institutions
Source:Eurekalert

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