Which of the following terms should the nurse use when there is a balance between outward re-coil of the chest wall and inward recoil of lungs at rest?
a. Functional residual capacity (FRC) is reached.
b. Vital capacity (VC) is reached.
c. Total lung capacity (TLC) is reached.
d. Residual volume (RV) is reached.
ANS: A
Balance between the outward recoil of the chest wall and inward recoil of the lungs occurs at the resting level, the end of expiration, where the FRC is reached. VC is the amount of air that can be forcibly expired after a maximal inspiration. TLC is not reflected by outward and inward re-coil. RV is the air that remains trapped in the alveoli.
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