Meconium aspiration syndrome is a serious pulmonary condition resulting from what?

Meconium aspiration syndrome is a serious pulmonary condition resulting from what?

• A. Viral infection transmitted from the mother.
• B. Inhalation of meconium-stained fluid by the newborn.
• C. Allergic reaction to amniotic fluid.
• D. Premature rupture of membranes without meconium involvement.

Answer: (B)

Meconium-stained fluid inhalation by the newborn is the key event. When a distressed fetus passes meconium into the amniotic fluid, the newborn can inhale it around the time of birth. The thick meconium can obstruct the small airways and irritate lung tissue, causing chemical pneumonitis. This combination impairs gas exchange, leads to hypoxemia, and can trigger inflammation and, in some cases, pulmonary hypertension. These changes manifest as respiratory distress after birth. Other scenarios, like a viral infection or an allergic reaction to amniotic fluid, don’t explain the airway obstruction and chemical irritation seen with meconium aspiration, and it isn’t related to rupture of membranes without meconium involvement.

Meconium-stained fluid inhalation by the newborn is the key event. When a distressed fetus passes meconium into the amniotic fluid, the newborn can inhale it around the time of birth. The thick meconium can obstruct the small airways and irritate lung tissue, causing chemical pneumonitis. This combination impairs gas exchange, leads to hypoxemia, and can trigger inflammation and, in some cases, pulmonary hypertension. These changes manifest as respiratory distress after birth. Other scenarios, like a viral infection or an allergic reaction to amniotic fluid, don’t explain the airway obstruction and chemical irritation seen with meconium aspiration, and it isn’t related to rupture of membranes without meconium involvement.