The flow waveform pattern that provides the shortest inspiratory time (TI) of all the available flow patterns with an equivalent peak flow rate setting is which of the following?
a. Sine
b. Constant
c. Ascending ramp
d. Descending ramp
Q. 2 Slow flow rates will cause which of the following to occur?
a. Poor gas exchange
b. Increase peak pressures
c. Shorten expiratory time
d. Decrease mean airway pressure
Q. 3 The flow waveform pattern that is created during pressure targeted ventilation is which of the following?
a. Sine
b. Constant
c. Ascending ramp
d. Descending ramp
Q. 4 Calculate the inspiratory time (TI) when a ventilator is set at a tidal volume (VT) of 500 mL and a constant flow rate of 30 L/min.
a. 0.6 second
b. 1 second
c. 1.5 second
d. 1.7 second
Q. 5 Calculate the inspiratory to expiratory (I:E) ratio for a ventilator that is set to deliver 850 mL at a frequency of 15 breaths/min with a flow rate of 45 L/min.
a. 1:1.1
b. 1:2.5
c. 1:3.5
d. 1:4
Q. 6 Calculate the inspiratory to expiratory (I:E) ratio when the inspiratory time is 0.5 second and the respiratory rate is 30 breaths/min.
a. 1:3
b. 1:4
c. 4:1
d. 3:1
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