護理師執行皮下依諾肝素（Enoxaparin）注射，下列哪項指導正確？
A nurse is administering a dose of subcutaneous enoxaparin. Which instruction is correct?
- AAspirate before injecting注射前進行回抽
- BMassage the site after administration給藥後按摩注射部位
- CInject into the abdominal fat layer✓ 正解注射至腹部脂肪層
- DExpel the air bubble from the syringe before injection注射前排出注射器內的氣泡
依諾肝素（Enoxaparin）屬於低分子量肝素（LMWH），注射時的技巧直接影響吸收與副作用。預充填針筒中的氣泡是設計的一部分，目的是在藥物注入後，將殘留在針頭內的藥物一併推進組織，確保劑量準確。選擇腹部脂肪層注射能確保藥物進入皮下而非肌肉層，減少出血與瘀青，且注射後嚴禁按摩，以免造成皮下微血管損傷。
Enoxaparin is a low-molecular-weight heparin (LMWH), and injection technique directly affects absorption and side effects. The air bubble in the prefilled syringe is intentional: after the drug is injected, the bubble pushes any residual medication out of the needle into the tissue, ensuring accurate dosing. Choosing the abdominal fatty layer ensures the drug enters the subcutaneous tissue rather than muscle, reducing bleeding and bruising; massage after injection is strictly prohibited to avoid damaging subcutaneous capillaries.