Which statement about TTN is true?

Which statement about TTN is true?

• A. TTN results from delayed clearance of fetal lung fluid.
• B. TTN is a bacterial infection.
• C. TTN is a chronic condition.
• D. TTN only occurs in preterm infants.

Answer: (A)

TTN is the result of delayed clearance of fetal lung fluid after birth. When fluid remains in the airways and interstitial spaces, gas exchange is temporarily impaired, causing tachypnea as the newborn works to oxygenate. This is a transient, self-limited condition that typically improves as the fluid is absorbed and the lungs clear, usually within 24 to 72 hours. It’s more common in term or near-term infants and is especially associated with cesarean delivery without labor, where the hormonal signals that help mobilize lung fluid are reduced. TTN is not caused by an infection, it is not a chronic condition, and while it can occur in preterm infants, it is not limited to them and often affects term babies as well.

TTN is the result of delayed clearance of fetal lung fluid after birth. When fluid remains in the airways and interstitial spaces, gas exchange is temporarily impaired, causing tachypnea as the newborn works to oxygenate. This is a transient, self-limited condition that typically improves as the fluid is absorbed and the lungs clear, usually within 24 to 72 hours. It’s more common in term or near-term infants and is especially associated with cesarean delivery without labor, where the hormonal signals that help mobilize lung fluid are reduced. TTN is not caused by an infection, it is not a chronic condition, and while it can occur in preterm infants, it is not limited to them and often affects term babies as well.