— 生理適應 · EASY · MCQ —
一位 COPD 病人正使用 2 L/min 鼻導管給氧。下列哪項觀察指標顯示治療目標已達成？
A client with COPD is receiving oxygen at 2 L/min via nasal cannula. Which observation indicates the treatment goal is being met?
- APaO2 of 105 mmHgPaO2 為 105 mmHg
- BRespiratory rate of 28 breaths/min呼吸頻率為 28 次/分
- CSpO2 of 98%SpO2 為 98%
- DSpO2 of 90%✓ 正解SpO2 為 90%
— Explanation · 中文詳解 —
COPD 病人因長期處於慢性呼吸衰竭，過高濃度的氧氣會抑制其呼吸中樞。臨床目標通常是維持 SpO2 在 88-92% 之間。C 與 A 的數值過高，不僅增加氧中毒風險，更可能抑制其呼吸驅動。B 代表呼吸急促，顯示缺氧或呼吸窘迫未緩解。
Because clients with COPD are in chronic respiratory failure long-term, excessive oxygen concentration can suppress their respiratory drive. The clinical goal is generally to maintain SpO2 between 88% and 92%. The values in C and A are too high, increasing the risk of oxygen toxicity and potentially suppressing respiratory drive. Option B represents tachypnea, indicating that hypoxia or respiratory distress has not been relieved.
✦ 台美臨床差異
美國護理師對 COPD 氧氣目標的認知較統一，台灣臨床有時仍習慣給予較高氧氣，需持續教育。