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학습 자료 둘러보기 →In a COPD patient with worsening hypoxemia (SpO2 88%) and tachypnea, the nursing process mandates assessment first. Pulse oximetry cannot detect rising PaCO2 levels, which signal hypercapnic respiratory failure.
An arterial blood gas (ABG) is the gold standard to measure PaO2, PaCO2, and pH. This objective data is critical before the provider can order advanced therapies like non-invasive ventilation (NIV) or adjust oxygen flow rates.
Do not increase O2 flow empirically. Uncontrolled oxygen therapy in COPD can depress the hypoxic drive, leading to dangerous CO2 retention, worsening acidosis, and respiratory arrest.
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