A 2-month-old infant is brought to the emergency room. Which factor should lead the RN to suspect that the child may have experienced abusive head trauma?

Choice A rationale Leg bruises on the body, particularly on shins or bony prominences, can be common in active children as they explore their environment. While any bruise in an infant warrants investigation, isolated leg bruises are not as specific for abusive head trauma as other findings, and their presence alone does not confirm abuse. Choice B rationale Retinal hemorrhage is a highly specific finding for abusive head trauma in infants, resulting from the violent acceleration-deceleration forces that tear delicate retinal vessels. The shearing forces on the brain lead to intracranial bleeding, and the associated pressure changes can cause bleeding within the retina, making it a strong indicator of non-accidental injury. Choice C rationale Unilateral bulging fontanels indicate increased intracranial pressure, which can be caused by various conditions including hemorrhage, infection, or tumors. While abusive head trauma can cause increased intracranial pressure, a unilateral bulging fontanel is not as specific as retinal hemorrhage and could be attributed to other medical conditions. Choice D rationale Unexplained fractures, especially in non-ambulatory infants, are highly suspicious for child abuse. However, while fractures can occur with abusive head trauma, they are not a direct consequence of the head trauma itself but rather from co-occurring physical abuse. Retinal hemorrhage is a more direct indicator of head trauma.