The energy required to move gas through the airways and expand the thorax is known as which of the following?
a. Airway resistance
b. Dynamic compliance
c. Intrinsic work of breathing
d. Extrinsic work of breathing
ANS: C
Intrinsic work of breathing is a result of work done to overcome normal elastic and resistive forces and work to overcome a disease process affecting normal workloads in the lungs and thorax. Airway resistance is the opposition to airflow from nonelastic forces of the lung. Dynam-ic compliance is a measurement of the ease of movement of gas through the airways. The work of breathing is a result of the airway resistance, dynamic compliance, and static compliance.
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