Which two ventilator parameters most directly affect tidal volume?
1. expiratory time (ET)
2. inspiratory time (IT)
3. peak inspiratory pressure (PIP)
4. positive end-expiratory pressure (PEEP)
A) 1 and 2
B) 1 and 4
C) 2 and 4
D) 3 and 4
Q. 2 A respiratory therapist is selecting an endotracheal tube for a patient in order to provide assisted ventilation. Which of the following factors can be affected by the choice of tube?
A) driving pressure
B) sex of the patient
C) viscosity of the gas
D) radius of the airway
Q. 3 What effect does an endotracheal tube (ET) and the associated ventilator tubing have on airway resistance?
A) It increases interstitial fluid in the lungs.B) It increases airway resistance.
C) It has no effect on airway resistance.
D) It decreases airway resistance.
Q. 4 A structure that has the ability to resist deformation when a force is exerted against it, and thus produces a recoil force is described as
A) elastic
B) complex
C) noncompliant
D) tense
Q. 5 Which of the following is most effective for preventing barotrauma?
A) careful regulation of rate and pressures
B) adherence to sterile technique whenever the airway is suctioned
C) limiting breaks in the circuit
D) pharmacologic sedation
Q. 6 A respiratory therapist is using a peak inspiratory pressure (PIP) of 23 cm H2O with a positive end-expiratory pressure (PEEP) of 4 cm H2O. What is the driving pressure created by the ventilator?
A) 8 cm H2O
B) 16 cm H2O
C) 19 cm H2O
D) 27 cm H2O
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