What type of drive mechanism would produce the pressure, volume, and flow waveforms illustrated below?
A. spring-loaded bellows
B. proportional solenoid valve
C. piston attached to a rotating crank
D. electric motor/rack and pinion
Q. 2 What tidal volume would the therapist need to set on the ventilator to achieve the desired tidal volume of 750 ml?
A. 760 ml
B. 775 ml
C. 840 ml
D. 1000 ml
Q. 3 A patient is receiving PC-CMV with a target tidal volume of at 750 ml. The average peak inspiratory pressure is 30 cm H2O, and the compliance factor for the breathing circuit is 3 ml/cm H2O. Calculate the volume compressed in the ventilator tubing.
A. 250 ml
B. 90 ml
C. 25 ml
D. 10 ml
Q. 4 Based on the volume and flow waveforms depicted below, determine the cycle and limit variables.
A. limit variables: pressure and volume; cycle variable: flow
B. limit variables: volume and flow; cycle variable: time
C. limit variables: volume and time; cycle variable: flow
D. limit variables: volume and flow; cycle variable: volume
Q. 5 If a rectangular (square) pressure waveform is generated during pressure-controlled ventilation, what type of waveforms will develop for volume and flow?
A. volume waveform: exponential rise; flow waveform: exponential decline
B. volume waveform: exponential decline; flow waveform: exponential rise
C. volume waveform: sinusoidal; flow waveform: ascending ramp
D. volume waveform: descending ramp; flow waveform: rectangular
Q. 6 Which of the following terms describe the configuration of a ventilator waveform? I. hyperbolic II. sinusoidal III. rectangular IV. exponential
A. II, III only
B. I, II, IV only
C. I, III, IV only
D. II, III, IV only
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