Which of the following statements is true?
a) Closing capacity exceeds functional residual capacity during infancy, but
reaches adult values at 1 year.
b) Highly compliant lungs in babies make them prone to collapse during
inhalation induction
c) Flatter diaphragm and horizontal ribs limits expiratory reserve volume in
infants
d) Major site of airway resistance in younger children is the medium-sized
bronchi.
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Answer
Answer d.
Closing capacity exceeds FRC until approximately 6 years of age.
Infants have poor lung compliance and high chest wall compliance. Flat
diaphragms and horizontal ribs decrease inspiratory reserve volume, not
expiratory reserve volume, in infants. Of the available options, only D is correct.
Notes
- This question originally printed in the Pediatric Anesthesiology Review Topics kindle book series, and appears courtesy of Naerthwyn Press, LLC.
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