下列哪些病人發生院內感染性肺炎（HAP）的風險最高？（選所有適合的）
Which of the following clients are at the highest risk for developing hospital-acquired pneumonia? (Select all that apply.)
- AMechanical ventilation bypasses natural airway defenses, facilitating bacterial entry.✓ 正解機械通氣繞過自然呼吸道防禦，促進細菌進入。
- BUrinary catheters increase the risk for UTI, not primarily pneumonia.導尿管增加泌尿道感染風險，而非主要導致肺炎。
- CEnteral feedings carry a high risk of aspiration, a leading cause of pneumonia.✓ 正解腸道餵食有高誤吸風險，這是肺炎的主要原因之一。
- DSmoking is a risk factor but does not uniquely trigger acute HAP compared to invasive interventions.吸菸是危險因子，但與侵入性介入相比，並不獨特地觸發急性院內獲得性肺炎。
- EBed rest contributes to atelectasis, which provides a culture medium for pneumonia.✓ 正解臥床導致肺萎陷，為肺炎提供培養基。
HAP 的風險因子核心在於呼吸道防禦機制被破壞或誤吸。插管機械通氣移除生理防禦；管灌飲食極易因逆流導致吸入性肺炎；長期臥床造成肺部擴張不全（atelectasis）與分泌物堆積。導尿管與尿道感染相關，非肺炎；長期吸菸雖屬危險因子，但不如侵入性醫療介入對急性肺炎的直接關聯性強。
Clients are at highest risk for hospital-acquired pneumonia if they are mechanically ventilated, receiving enteral feedings, or on prolonged bed rest. Mechanical ventilation bypasses natural airway defenses, enteral feeding increases aspiration risk, and immobility leads to secretion pooling and atelectasis. While smoking is a chronic risk factor, it is less directly associated with acute hospital-acquired pneumonia compared to these invasive or physiological factors.
美國 ICU 實施嚴格 VAP Bundle (Bundle care)；台灣多採感控指引，但在落實頻率與標準化程度上可能略有不同。