A patient with chronic obstructive pulmonary disease needs a controlled oxygen concentration because of worsening dyspnea. Which device delivers the most precise fixed oxygen concentration?
Correct answer: C. Venturi mask
- A. Nasal cannula
- B. Simple face mask
- C. Venturi mask
- D. Non-rebreather mask
Explanation
A Venturi mask entrains a fixed amount of room air and delivers a predictable oxygen concentration. A nasal cannula and simple mask provide variable concentrations, while a non-rebreather mask delivers a high concentration rather than a precise low concentration.
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About Respiratory Nursing
Covers nursing assessment and management of asthma, chronic obstructive pulmonary disease, pneumonia, tuberculosis, pleural disorders and respiratory failure. Key areas include breath sounds, oxygen therapy, airway suctioning, inhaled medicines, arterial blood gases and the difference between hypoxia, hypoxemia and carbon dioxide retention.
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