[{"data":1,"prerenderedAt":65},["ShallowReactive",2],{"q-nurse-112-3-maternal-pediatric-017":3},{"subject":4,"subjectSlug":5,"subjectFullName":4,"question":6,"related":33,"lastmod":64},"產兒科護理學","maternal-pediatric",{"id":7,"webId":8,"year":9,"session":10,"subject":4,"number":11,"stem":12,"options":13,"answer":18,"answerNote":19,"images":20,"explanation":21,"explanationDeep":22,"topics":23,"freq":10},"nurse-112-3-產兒科護理學-017","nurse-112-3-maternal-pediatric-017",112,3,17,"促使新生兒出生後動脈導管功能性關閉的最主要原因為何？",{"A":14,"B":15,"C":16,"D":17},"肺擴張後左心房壓力減少","肺擴張後血氧分壓上升","剪斷臍帶後肝臟血液增加","剪斷臍帶後下腔靜脈血液減少","B",null,[],"本題考點在於新生兒出生後動脈導管（ductus arteriosus）功能性關閉的主要生理機轉。胎兒出生後肺臟擴張、開始呼吸，血氧分壓（PaO₂）上升，高血氧會直接刺激動脈導管平滑肌收縮而使其功能性關閉，故選 B。A 肺擴張後回流左心房的血量增加、壓力上升而非減少，且非導管關閉主因；C 剪斷臍帶影響的是靜脈導管與肝門循環，與動脈導管無直接關係；D 下腔靜脈血量變化主要關聯卵圓孔關閉，非動脈導管的主導因素。","血氧上升是動脈導管收縮的關鍵刺激（同時前列腺素 E2 濃度下降解除其擴張作用）。相對地，卵圓孔的功能性關閉主因是肺循環開啟後左心房壓 > 右心房壓。臨床上早產兒因血氧與前列腺素調節不成熟，易出現開放性動脈導管（PDA）。",[24,26,29,31],{"term":25,"count":10},"胎兒循環轉換",{"term":27,"count":28},"動脈導管功能性關閉",1,{"term":30,"count":28},"血氧分壓上升",{"term":32,"count":28},"前列腺素 E2",[34,38,44,49,54,59],{"webId":35,"stem":36,"number":37,"year":9,"session":10},"nurse-112-3-maternal-pediatric-018","有關新生兒之身體評估方式，下列何者不適當？",18,{"webId":39,"stem":40,"number":41,"year":42,"session":43},"nurse-113-2-maternal-pediatric-014","有關乳腺炎（mastitis）的敘述，下列何者錯誤？",14,113,2,{"webId":45,"stem":46,"number":47,"year":48,"session":28},"nurse-114-1-maternal-pediatric-008","有關吸入性麻醉藥（inhalation anesthesia），下列敘述何者錯誤？",8,114,{"webId":50,"stem":51,"number":52,"year":53,"session":43},"nurse-115-2-maternal-pediatric-006","有關懷孕期婦女常見的心理適應，下列敘述何者最適當？",6,115,{"webId":55,"stem":56,"number":57,"year":58,"session":43},"nurse-106-2-maternal-pediatric-080","雷氏症候群（Reye’s syndrome）早期病變的主要徵象為何？",80,106,{"webId":60,"stem":61,"number":62,"year":63,"session":28},"nurse-108-1-maternal-pediatric-034","有關高危險妊娠的敘述，下列何者正確？",34,108,"2026-09-04",1788510745381]