護理師照護一位緊急氣切後新置入氣管內管的病人，該病人使用呼吸器。哪項發現需要立即關注？
A nurse is caring for a client with a newly placed endotracheal tube following an emergency tracheotomy. The client is on mechanical ventilation. Which finding requires immediate attention?
- AEnd-tidal CO2 reading of 35 mmHg呼氣末二氧化碳讀數為 35 mmHg
- BSlight facial edema around the tracheostomy site氣切部位周圍有輕微面部水腫
- CSynchronized breathing with the ventilator與呼吸器同步呼吸
- DSudden decrease in oxygen saturation and bilateral crackles✓ 正解氧飽和度突然下降並伴有雙側囉音
在機械通氣病人身上，氧飽和度（SpO2）的驟降是氣體交換功能急性惡化的首要警訊。合併雙側肺部囉音（Bilateral Crackles）則強烈提示肺部發生了急性問題，如肺水腫、大量分泌物堵塞或吸入性肺炎。這屬於呼吸系統的急症，護理師必須立刻評估氣道通暢度、呼吸音及呼吸器設定，並通知醫療團隊進行緊急處理，以防病人發生缺氧性損傷。
In a mechanically ventilated client, a sudden drop in oxygen saturation (SpO2) is the foremost warning of acute deterioration in gas exchange. Combined with bilateral lung crackles, it strongly suggests an acute pulmonary problem such as pulmonary edema, large-volume secretion obstruction, or aspiration pneumonia. This is a respiratory emergency, and the nurse must immediately assess airway patency, breath sounds, and ventilator settings, and notify the medical team for emergency management to prevent hypoxic injury.