Final answer:
The vital capacity (VC) is a measurement of the maximum amount of air that can be inhaled or exhaled during a respiratory cycle. It is the sum of the expiratory reserve volume, tidal volume, and inspiratory reserve volume.
Step-by-step explanation:
The respiratory criteria for extubation can be assessed using several measurements, including Vital Capacity (VC), Maximal Negative Inspiratory Force (MIF), Tidal Volume (VT), and Peak Expiratory Flow Rate (PEFR). However, in this context, we will focus on the vital capacity (VC). The VC measures the maximum amount of air that can be inhaled or exhaled during a respiratory cycle.
The VC is the sum of the expiratory reserve volume (ERV), tidal volume (TV), and inspiratory reserve volume (IRV).