護理師準備進行無菌換藥，下列哪些行為會破壞無菌區域？（選所有適合的）
The nurse is preparing to perform a sterile dressing change. Which of the following actions compromises the sterile field? (Select all that apply.)
- ATurning the back to the sterile field to reach for supplies✓ 正解轉身背對無菌區去拿取用品
- BPlacing a sterile item 2 inches from the edge of the field將無菌物品放置在距離無菌區邊緣 2 英吋處
- CAllowing a sterile drape to hang below waist level✓ 正解讓無菌鋪單垂掛在腰部以下
- DKeeping the sterile field in constant view保持無菌區始終在視線範圍內
- ETalking over the sterile field while explaining the procedure✓ 正解在解釋程序時，說話跨越無菌區上方
無菌操作的核心在於維持無菌區域（Sterile field）的完整性，防止微生物污染。護理師必須全程保持對無菌區的視覺監控，避免任何非無菌物品觸碰或跨越上方。任何低於腰部高度、背對無菌區或未經確認的污染源，皆會破壞無菌性，導致感染風險增加。臨床實務中，無菌區的邊緣一英吋（1 inch）通常被視為污染區，操作時需嚴格遵守這些空間界線。
The core of sterile technique is to maintain the integrity of the sterile field and prevent microbial contamination. The nurse must maintain visual monitoring of the sterile field throughout the procedure, avoiding any non-sterile items contacting or crossing over the field. Anything below the waist, turning the back to the sterile field, or unverified sources of contamination will compromise sterility and increase infection risk. In clinical practice, the outer 1 inch of the sterile field is generally considered contaminated, and these spatial boundaries must be strictly observed.