How will the delivered tidal volume be affected during volume control ventilation when the patient's pulmonary compliance decreases, or when the patient's airway resistance increases? The patient's tidal volume will ________________
A. increase
B. decrease
C. remain constant
D. fluctuate
?ANS: C
A. Incorrect response: See the explanation associated with response C.
B. Incorrect response: See the explanation associated with response C.
C. Correct response: The description volume control, or volume targeted, ventilation means that volume is the variable that remains constant throughout the delivery of the breath. In addition to setting the tidal volume, the therapist is responsible for setting the inspiratory flow or inspiratory time, inspiratory flow pattern, and the mandatory rate. During a volume-controlled breath, the tidal volume, inspiratory flow, and flow pattern do not change despite alterations in lung characteristics (i.e., lung compliance and/or airway resistance).
D. Incorrect response: See the explanation associated with response C.
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