Grunting: Grunting if true, is a sign of respiratory distress in infants. By grunting, infants are applying brakes to their exhalation so that the lungs do not completely empty their air. Grunting helps to maintain a positive pressure in the lungs and hence keep the lungs inflated. It is usually seen with pneumonia, excessive fluids in the lungs and other conditions when the lungs become stiff.
Answered 7/25/2019
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