Which of the following statements are true concerning the relationship among ACV, PSV, PAV, and airway pressure, respiratory muscle pressure?
A. With ACV, airway pressure and respiratory muscle pressure are proportional.
B. With PSV, airway pressure and respiratory muscle pressure are unrelated.
C. With PAV, airway pressure is inversely related to respiratory muscle pressure.
D. With PAV, airway pressure and respiratory muscle pressure are unrelated.
Q. 2 When neurally adjusted ventilatory assist is used, ventilator triggering is independent of which of the following factors? I. lung compliance II. auto-PEEP III. inspiratory time IV. airway resistance
A. I, III only
B. II, IV only
C, I, II, IV only
D. II, III, IV only
Q. 3 When a therapist progressively decreases the mandatory rate when ventilating a patient with VC-SIMV, what can the therapist expect to observe as the spontaneous VT decreases and the VD/VT ratio increases?
A. an increased spontaneous respiratory rate
B. ventilationperfusion mismatching
C. an increased shunt fraction
D. a decrease in the spontaneous ventilatory effort
Q. 4 What problem is the therapist likely to observe when a mechanically ventilated COPD patient continues to receive inspiratory flow while the patient is actively exhaling?
A. auto-triggering
B. flow starvation during inspiration
C. ineffective triggering
D. respiratory muscle unloading
Q. 5 When synchronized intermittent mandatory ventilation is used, which of the following variables can be the cycle variables? I. time II. flow III. volume IV. pressure
A. IV only
B. II, III only
C. I, II, III only
D. I, III, IV only
Q. 6 The therapist is about to establish mechanical ventilator settings for a COPD patient who has a large ventilation time constant. Which of the following considerations should the therapist have in mind at this time?
A. a large T
B. a long TE
C. a long TI
D. a low I
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