In the air-mix setting, the flow and pressure waveforms that can be produced by the Bird Mark 7 include:
a. constant-flow wave (square) and ascend-ing-pressure wave.
b. ascending-flow wave and descend-ing-pressure wave.
c. descending-flow wave and ascend-ing-pressure wave.
d. sine-flow wave and ascending-pressure wave.
ANS: C
In the air-mix position, the Venturi is activated, producing a descending-flow pattern and an ir-regular pressure waveform that ranges from ascending to rectangular, depending on the compli-ance and resistance of the patient's respiratory system.
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