A nurse is assessing a client who has asthma. Which of the following areas should the nurse evaluate as the most reliable indicator of central cyanosis?
Soles of the feet
Ear lobes
Oral mucosa
Conjunctivae
The Correct Answer is C
This is because central cyanosis reflects a decrease in arterial oxygen saturation and is best seen in areas where blood vessels are close to the surface, such as the oral mucosa, tongue, and lips. Peripheral cyanosis, which may be caused by vasoconstriction or poor circulation, can be seen in the soles of the feet, ear lobes, and nail beds, but it does not necessarily indicate hypoxemia.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
This is because central cyanosis reflects a decrease in arterial oxygen saturation and is best seen in areas where blood vessels are close to the surface, such as the oral mucosa, tongue, and lips. Peripheral cyanosis, which may be caused by vasoconstriction or poor circulation, can be seen in the soles of the feet, ear lobes, and nail beds, but it does not necessarily indicate hypoxemia.

Correct Answer is ["A","C","D","E","F"]
Explanation
- Disorientation may indicate hypoxia, infection, or medication side effects. - Yellow sputum may indicate a bacterial infection that requires antibiotics. - Nebulizer use may indicate that the client is not using it correctly or regularly as prescribed, which can affect their lung function and oxygenation. - Ankle edema may indicate fluid overload or heart failure, which can worsen COPD symptoms and increase the risk of complications.
- Living alone may pose safety risks for the client, especially if they are disoriented or have difficulty managing their oxygen and nebulizer treatments. The nurse should assess the client's support system and refer them to community resources if needed.
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