一名懷疑一氧化碳中毒的病人入院，下列哪項評估發現是護理師應優先考量的？
A client is admitted with a suspected carbon monoxide poisoning. Which assessment finding is most important for the nurse to prioritize?
- AOxygen saturation (SpO2) of 98%血氧飽和度 (SpO2) 為 98%
- BTachypnea呼吸過速
- CConfusion and restlessness✓ 正解意識混亂與躁動
- DCherry-red skin color櫻桃紅色皮膚
一氧化碳（CO）中毒的核心問題為 carboxyhemoglobin 取代氧合血紅素，造成嚴重組織缺氧（特別是腦部）。依 ABC 與 NCLEX 優先原則，最優先評估是 C「意識混亂與躁動」——這是腦缺氧的最關鍵末端器官損害徵象，需立即介入（高流量 100% 氧氣或 hyperbaric oxygen）。其他選項：A. SpO2 98% 是脈搏血氧儀的「假性正常」現象（無法區分 carboxyhemoglobin），是護理師需要「知道」的工具限制，但不是優先評估的「臨床表現」；A. 櫻桃紅皮膚為晚期徵象；D. 呼吸急促為代償。注意：診斷需測 carboxyhemoglobin (COHb) 濃度與 ABG（PaO2 與 SpO2 不同）。
The core problem in carbon monoxide (CO) poisoning is that carboxyhemoglobin displaces oxyhemoglobin, producing severe tissue hypoxia, especially in the brain. According to the ABC and NCLEX prioritization principles, the highest-priority assessment is option C, confusion and restlessness, which represents the most critical end-organ damage from cerebral hypoxia and requires immediate intervention (high-flow 100% oxygen or hyperbaric oxygen therapy). Regarding the other options: B. SpO2 of 98% is a 'falsely normal' reading from pulse oximetry (which cannot distinguish carboxyhemoglobin) and is an important tool limitation the nurse must know, but it is not the priority clinical finding; A. cherry-red skin is a late sign; D. tachypnea is a compensatory response. Note: diagnosis requires measuring carboxyhemoglobin (COHb) concentration and ABG (PaO2, which differs from SpO2).
此為典型的 NCLEX 陷阱題。台美護理教育皆強調脈搏血氧儀之限制，但在臨床決策上，此處的優先級即為「識破偽正常值」。