During spontaneous respirations, the major contribution to the total respiratory resistance is by which of the following?

A. Nasal airway and mouth

B. Glottis

C. Trachea

D. Bronchi

E. Bronchioles

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Answer

The answer is A. The nose, mouth and large airways constitute the major components of airway resistance.[1]

Notes

  1. LeSouef PN, England SJ, Bryan AC. Total resistance of the respiratory system in preterm infants with and without an endotracheal tube. J Pediatr. 1984 Jan;104(1):108-11.[1]

Arterial lines -Great Ormond Street Hospital

Keywords

Carl F Doershuk and LeRoy W Matthews. Airway Resistance and Lung Volume in the Newborn Infant Pediatric Research (1969) 3, 128–134.



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