Page 446 - Clinical Application of Mechanical Ventilation
P. 446
412 Chapter 12
Self-Assessment Questions
1. Strategies that are useful to improve ventilation include all of the following except:
A. increase mechanical deadspace.
B. increase ventilator tidal volume.
C. increase ventilator frequency.
D. increase pressure support for spontaneously breathing patients.
2. Dr. McFarland asks the therapist to adjust the ventilator in order to improve the oxygenation status of
the patient with normal V/Q status. Which of the following ventilator adjustments would have the most
direct effect on oxygenation?
A. decrease tidal volume (V )
T
B. decrease pressure support ventilation (PSV)
C. increase mandatory frequency (f)
D. increase oxygen concentration (F O )
2
I
3. An endotracheal tube is sometimes shortened because a shorter ET tube:
A. increases the F O .
I
2
B. increases the mechanical deadspace volume.
C. facilitates airway management and secretions removal.
D. reduces the arterial pH.
4. The primary purpose of permissive hypercapnia is to reduce the patient’s _______ during mechanical
ventilation.
A. tidal volume C. pulmonary pressures
B. pH D. frequency
5. Permissive hypercapnia is a technique in which the mechanical _______ is reduced. This change is done
intentionally to increase a patient’s _______.
A. peak airway pressure, pH
B. peak airway pressure, PaO 2
C. tidal volume, pH
D. tidal volume, PaCO 2
6. CPAP and PEEP may be used to reduce or correct refractory hypoxemia caused by:
A. deadspace ventilation.
B. V/Q mismatch.
C. intrapulmonary shunting.
D. diffusion defect.
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