Which of the following classifications matched the volume-controlled, continuous mandatory ventilation (VC-CMV) mode?
A. pressure-controlled, time-triggered, volume-limited, volume-cycled
B. volume-controlled, pressure-triggered, pressure-limited, flow-cycled
C. volume-controlled, time-triggered, flow-limited, time-cycled
D. volume-controlled, pressure-triggered, flow-limited, pressure-cycled
?ANS: C?A. Incorrect response: Volume controlled-continuous mandatory ventilation (VC-CMV) cannot be pressure-controlled. In pressure-controlled, continuous mandatory ventilation (PC-CMV), pressure is the control variable, which implies that both spontaneous and mandatory breaths are available. Pressure control also implies that the mandatory breaths are either pressure-triggered (patient-cycled) or time-triggered.
B. Incorrect response: VC-CMV is volume-controlled and may be either pressure- or time-triggered. Pressure is not a limit variable, and the cycle variable is not flow.
C. Correct response: VC-CMV is (1) volume-controlled; (2) either pressure- or time-triggered, (3) flow-limited, and (4) time-cycled.
D. Incorrect response: VC-CMV is not pressure-cycled.?
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