PVL incidences occur within how many hours after birth?

PVL incidences occur within how many hours after birth?

• A. 48
• B. 24
• C. 72
• D. 96

Answer: (A)

PVL is a pattern of brain injury from hypoxic-ischemic events that typically occurs in the perinatal period, when the brain is most vulnerable. The acute insult to the periventricular white matter happens around birth, so the most relevant window for when PVL-related changes begin to appear and be detectable is the first 2 days after birth. That’s why the common exam answer points to within 48 hours. While PVL can have longer-term consequences and may be discussed in broader terms, the early neonatal window used in questions is the first 48 hours after birth.

PVL is a pattern of brain injury from hypoxic-ischemic events that typically occurs in the perinatal period, when the brain is most vulnerable. The acute insult to the periventricular white matter happens around birth, so the most relevant window for when PVL-related changes begin to appear and be detectable is the first 2 days after birth. That’s why the common exam answer points to within 48 hours. While PVL can have longer-term consequences and may be discussed in broader terms, the early neonatal window used in questions is the first 48 hours after birth.