下列何者展現了更換傷口敷料時正確的無菌技術？

無菌技術（Sterile technique）是預防醫療照護相關感染（Healthcare-Associated Infections, HAIs）的關鍵，尤其在執行侵入性程序（如傷口換藥、導管置入）時，必須嚴格遵守，以避免將病原體引入無菌區域。 正確選項 D 是維持無菌的關鍵原則。無菌物品必須保持在視線範圍內，且應高於腰部（waist level）。這樣可以防止物品意外被污染，因為腰部以下通常被視為非無菌區域，且視線範圍內有助於及時發現潛在的污染。 錯誤選項 A（為了省時而跨越無菌區）是違反無菌原則的行為。任何未受保護的身體部位或物品跨越無菌區，都會將其上的微生物傳播到無菌區，造成污染。錯誤選項 C（無菌鋪巾邊緣接觸桌緣）也是錯誤的。無菌鋪巾（sterile drape）的邊緣一英吋（約 2.5 公分）被視為非無菌區域，若接觸到非無菌的表面（如桌邊），整個鋪巾就會被污染。錯誤選項 B（病人未準備好就打開無菌包）可能導致無菌物品在病人尚未就緒時暴露於環境中，增加污染風險。 臨床思路：護理師在執行無菌程序前，應仔細準備所有必需品，並確保環境與自身準備就緒，以避免在操作過程中因匆忙而違反無菌原則。安全優先：嚴格執行無菌技術是預防傷口感染、血流感染等嚴重併發症的根本。

Sterile technique is key to preventing healthcare-associated infections (HAIs), particularly when performing invasive procedures (such as wound dressing changes and catheter insertions), and must be strictly observed to avoid introducing pathogens into a sterile field. The correct answer D is a key principle of maintaining sterility. Sterile items must remain within sight and above waist level. This prevents items from being inadvertently contaminated, since anything below the waist is considered non-sterile, and keeping items in view helps detect potential contamination promptly. The incorrect option A (reaching across the sterile field to save time) violates sterile principles. Any unprotected body part or object that crosses the sterile field can transfer microorganisms to it, causing contamination. The incorrect option C (the edge of a sterile drape touching the edge of the table) is also incorrect. The outer one inch (about 2.5 cm) of a sterile drape is considered non-sterile, so if it touches a non-sterile surface (such as the edge of a table), the entire drape becomes contaminated. The incorrect option B (opening a sterile pack before the client is ready) may cause the sterile items to be exposed to the environment before the client is prepared, increasing the risk of contamination. Clinical reasoning: before performing a sterile procedure, the nurse should carefully prepare all necessary supplies and ensure that the environment and the nurse are ready, to avoid breaching sterile principles in a rush. Safety first: strict adherence to sterile technique is fundamental to preventing serious complications such as wound infections and bloodstream infections.

無菌技術（Sterile technique）的原則在台美兩地醫療機構中是完全一致的，都遵循國際公認的標準，如 CDC 的指引。其核心原則包括：保持無菌區域在視線範圍內且高於腰部、任何非無菌物品不可接觸無菌區、無菌區邊緣一英吋視為污染區等。台灣的護理教育與實踐嚴格遵循這些標準。