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An adult at rest should have a respiratory rate that ranges between:
Select one:
A. 8 and 15 breaths/min.
B. 22 and 24 breaths/min.
C. 12 and 20 breaths/min.
D. 10 and 18 breaths/min. - correct answer -C. 12 and 20 breaths/min.
High-flow oxygen with a nasal cannula during the preoxygenation phase
of endotracheal intubation is called:
Select one:
A. denitrogenation.
B. apneic oxygenation.
C. passive ventilation.
D. active ventilation. - correct answer -B. apneic oxygenation.
,An oxygen cylinder should be taken out of service and refilled when the
pressure inside it is less than:
Select one:
A. 1,500 psi.
B. 500 psi.
C. 200 psi.
D. 1,000 psi. - correct answer -B. 500 psi.
Gas exchange in the lungs is facilitated by:
Select one:
A. adequate amounts of surfactant.
B. pulmonary capillary constriction.
C. surfactant-destroying organisms.
D. water or blood within the alveoli. - correct answer -A. adequate
amounts of surfactant.
At a flow rate of 6 L/min, a nasal cannula can deliver an approximate
oxygen concentration of up to:
, Select one:
A. 24%.
B. 35%.
C. 52%.
D. 44%. - correct answer -D. 44%.
Irregular respirations characterized by an increasing rate and depth of
breathing followed by periods of apnea are called:
Select one:
A. eupneic respirations.
B. ataxic respirations.
C. agonal respirations.
D. Cheyne-Stokes respirations. - correct answer -D. Cheyne-Stokes
respirations.
Oxygen toxicity is a condition in which:
Select one:
A. decreased levels of oxygen in the blood result in free radical
production.