Which of the following indicators are useful in assessing respiratory muscle strength?
1. Maximum voluntary ventilation (MVV)
2. Forced vital capacity (FVC)
3. Dead space-to-tidal volume ratio (VD/VT)
4. Maximum inspiratory pressure (MIP)
a. 1 and 3 only
b. 2 and 4 only
c. 3 and 4 only
d. 1, 2, and 4 only
ANS: D
The most commonly used tests to assess respiratory muscle strength at the bedside are MIP and maximum expiratory pressure (MEP), FVC, and MVV.
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