硫酸脱氢表雄酮
快速浏览
为何检测?
明确DHEAS浓度是否正常以帮助评估肾上腺功能。
何时检测?
当女性出现过多面部毛发或体毛(多毛症),座疮,闭经或不孕;男性青春期过早出现(早熟)或者女童出现男性化体征时可申请检测。
何种样本?
采自肘静脉的血液样本。
是否需要作试验前准备?
不需要。
检测样本
检测什么?
硫酸脱氢表雄酮(DHEAS)是雄激素的一种,男性和女性血液中均存在。DHEAS在男性青春期第二性征发育中起重要作用,可被机体代谢转变为例如睾酮和雄甾烯二酮等更有力的雄激素,或者转变为女性性激素雌激素。DHEAS由肾上腺皮质分泌,少量由女性卵巢和男性睾丸分泌。DHEAS分泌由垂体促肾上腺皮质激素和其他垂体因素控制。
因为DHEAS主要由肾上腺分泌,因此是评价肾上腺功能的有效指标。肾上腺良性肿瘤、恶性肿瘤和肾上腺增生可以导致DHEAS过度分泌。虽然高水平DHEAS在成年男性中不会被注意到,但是可导致女性出现闭经和可见的男性化症状。这些变化严重程度不同,包括:
儿童DHEAS水平过高会导致男孩性早熟症;女孩出现外生殖器性别不清、体毛增多和月经周期异常。
测试样本如何采集?
通常抽取肘部静脉血。某些情况下,特别是儿科,常采取手指末端血液样本,即“指血”标本。
是否需要进行任何试验前准备以保证样本的质量?
不需要任何准备。女性患者需和医生确定检测时间。医生需要采集女性患者月经期前后一周的血液样本。
试验
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参考文献
注意:本文是在此处引用的参考文献和医学检验项目在线介绍编辑审核委员会全体成员的经验和研究结果的基础上总结而成。本文由编辑委员会定期审核、更新。任何新引用的文献都会添加到列表中,并且会与原有的参考文献区分开。
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