Approach to oxygenation, hypoxemia, and hypoxemic respiratory failure

Common misconceptions and mistakes

• Hypoxemia is a significant cause of dyspnea
• A cutaneous O 2 sat ≥ 92% predicts adequate oxygenation and is the appropriate target for O 2 orders
• 100% O 2 suppresses respiratory drive in CO 2 retainers
• O 2 supplementation for patients with COPD is given to improve exercise tolerance
• Confusing failure of oxygen delivery to tissues, hypoxia (the job of the circulatory system) with hypoxemia, and failure to maintain an adequate Pa o 2 (the job of the respiratory system)

常見的誤解和錯誤

• 低氧血症是導致呼吸困難的重要原因
• 皮膚 O 2 sat ≥ 92% 預示氧合充足，是 O 2 級的合適目標
• 100% O 2 抑制 CO 2 保持器中的呼吸驅動
• 為 COPD 患者補充 O 2 以提高運動耐量
• 將無法向組織輸送氧氣、缺氧（循環系統的工作）與低氧血症以及無法維持足夠的 Pa o 2（呼吸系統的工作）相混淆

oxygenation