Eye ultrasounds may assist with detecting brain shunt failure in children: Study

Use of an eye ultrasound may quickly and safely identify children with brain drainage tube failure in the emergency department, according to a new study. The research will be presented at the Pediatric Academic Societies (PAS) 2024 Meeting, held May 3-6 in Toronto.

A ventricular shunt is a surgically implanted thin, plastic tube that drains extra fluid and relieves pressure on the brain. Children receive ventricular shunts for hydrocephalus, a condition where brain fluid doesn’t drain or reabsorb properly from brain bleeds, tumors, or other causes. Nearly 30% of shunts break, are displaced, or become blocked within two years of placement, and another 5% fail each year after that, experts say.

When a patient visits the emergency department for potential shunt failure, their symptoms are often nonspecific, including headache, vomiting, and fatigue, according to researchers. Shunt failure is life threatening, and children with shunts typically undergo multiple computed tomography and magnetic resonance imaging scans per year, exposing them to excessive radiation and sedation. A backup of fluid causes the optic nerve sheath to swell, which researchers can measure with eye ultrasound.