问题
单项选择题
An 8-month-old boy is admitted to the pediatric unit following a fall from his high chair. The child is awake, alert, and crying. The nurse should know that a brain injury is more severe in children because of （）.
A．increased myelination.
B．intracranial hypotension.
C．cerebral hyperemia.
D．a slightly thicker cranium.
答案
参考答案：C
解析：
Cerebral hyperemia (excess blood in the brain) causes an initial increase in intracranial pressure in the head of an injured child. The brain is less myelinated in a child and more easily injured than an adult brain. Intracranial hypertension--not hypotension-- places the child at greater risk for secondary brain injury. A child's cranium is thinner and more pliable, causing the child to receive a more severe injury.
