護理師在執行傷口換藥時，應採取哪項措施以維持無菌領域（Sterile Field）？
Which action should the nurse take to maintain a sterile field during a wound dressing change?
- ATurn away from the sterile field to talk to a colleague.與同事交談時背對無菌區域
- BReach across the sterile field to pick up supplies.跨越無菌區域撿取用品
- CPlace sterile items within the 1-inch border of the field.將無菌物品放置在無菌區域邊緣1英吋處
- DKeep the sterile field above the level of the waist.✓ 正解將無菌區域保持在腰部以上水平
維持無菌領域的關鍵原則之一是：所有無菌物品必須保持在視線範圍內且高於腰部。低於腰部會被視為污染，因為無法持續監控。B 選項（跨越無菌區）會造成微生物掉落；C 選項（1英吋邊緣）在定義上屬於污染區；A 選項（背對無菌區）會使護理師無法監控該區域是否仍維持無菌狀態。
A key principle of maintaining a sterile field is that all sterile items must remain within sight and above the level of the waist. Anything below the waist is considered contaminated because it cannot be continuously monitored. Option B (reaching across the sterile field) causes shedding of microorganisms; option C (the 1-inch border) is by definition considered contaminated; option A (turning away from the sterile field) prevents the nurse from monitoring whether the field has remained sterile.
美國 NCLEX 考試極其重視無菌技術的細節；台灣臨床上在忙碌時，對於 1 英吋邊緣的嚴謹度有時會因人力負荷而有所妥協。