Final answer:
A bulging fontanel is an indication of increased intracranial pressure (ICP) in an infant with spina bifida and a ventriculoperitoneal shunt for hydrocephalus.
Step-by-step explanation:
A nurse should identify a bulging fontanel as an indication of increased intracranial pressure (ICP) in an infant with spina bifida and recently placed ventriculoperitoneal shunt for hydrocephalus.
Increased ICP can cause the fontanel, or soft spot on the infant's skull, to bulge due to the accumulation of cerebrospinal fluid (CSF) in the brain. This is a sign of increased pressure within the skull.
Options B, C, and D are not specific indicators of increased ICP in this scenario.