What is the primary purpose of using a CPAP machine for the treatment of obstructive sleep apnea (OSA)?
To deliver a continuous flow of air pressure to keep the airway open
To reduce daytime sleepiness
To improve sleep quality
To promote weight loss
The Correct Answer is A
A. Delivering a continuous flow of air pressure to keep the airway open is correct. CPAP (Continuous Positive Airway Pressure) prevents airway collapse during sleep, allowing for uninterrupted breathing and oxygenation.
B. Reducing daytime sleepiness is a benefit of CPAP use, but it is not its primary purpose—it is a secondary effect of improved oxygenation and sleep continuity.
C. Improving sleep quality also occurs with CPAP therapy, but this is an outcome rather than the primary purpose.
D. Promoting weight loss is not the function of CPAP therapy, though weight loss can help reduce OSA severity.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Use of accessory muscles during inspiration is common in COPD as clients work harder to breathe. While this indicates respiratory distress, it is not necessarily an immediate emergency.
B. Large amounts of thick white sputum can indicate mucus production, which is common in COPD. If the sputum were yellow or green, it could suggest infection, requiring further assessment.
C. A barrel chest and clubbing are chronic changes in COPD due to prolonged air trapping and hypoxia. These findings do not require immediate intervention.
D. Oxygen flowmeter set on 8 LPM is correct. High-flow oxygen can suppress the hypoxic drive in COPD clients, leading to respiratory depression. The nurse should immediately lower the oxygen to a safer level (typically 1-3 LPM) and monitor the client’s respiratory status.
Correct Answer is ["A","B","C","E","F"]
Explanation
A. Vital signs . The client has tachycardia (HR 138/min) and tachypnea (RR 28/min), which may indicate worsening heart failure or fluid overload. The low blood pressure (96/75 mmHg) is also concerning, especially with rapid ventricular response (RVR).
B. Respiratory assessment . The presence of a frequent cough with pink-tinged sputum suggests pulmonary congestion or pulmonary edema, a sign of worsening left-sided heart failure.
C. Renal function . The BUN of 28 mg/dL (elevated) and creatinine of 1.5 mg/dL (borderline high) suggest possible kidney impairment due to decreased cardiac output and poor perfusion.
D. Cardiac enzymes . The client denies chest pain or discomfort, so cardiac enzymes are not the immediate priority.
E. BNP (B-type natriuretic peptide) . BNP is a key marker of heart failure severity and helps guide treatment decisions.
F. ECG results . The atrial fibrillation with RVR increases the risk of hemodynamic instability and potential thromboembolic events, requiring urgent intervention.
G. Neurologic status . The client is alert, oriented, and following commands, so no immediate neurologic concerns are present.
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