推荐回答(5个)
甲状腺疾病现在很常见,要了解甲状腺功能,最简单的办法就是抽点血查一下。不同的医院由于检测方法不一样,可能正常值范围也有差别。
你好,甲状腺过氧化物酶抗体的增高,提示的是甲状腺炎症的出现,特别是桥本氏甲状腺炎症,多见于女性。如果是甲状腺激素,像甲状腺T3、T4都正常的情况下,单单出现了过氧化物酶抗体的增高,绝大部分提示的是桥本氏甲状腺炎,建议患者定期的随访,如果出现功能异常,一定要进行药物的治疗。所以如果甲状腺功能正常,或者是甲状腺功能偏低,则适当补充甲状腺素,定期观察就行,希望对你有帮助。
如果医师怀疑患者的甲状腺功能有问题,会让患者抽血进行甲状腺功能的检查,这项检查实际是检测血液中甲状腺素(T4)和三碘甲状腺原氨酸(T3)这两种甲状腺激素的水平,从而了解甲状腺的功能(甲状腺功能可以理解为甲状腺合成、分泌甲状腺激素的能力)。甲状腺功能正常则甲状腺激素(T3、T4)在正常范围;甲亢或甲状腺毒症时甲状腺激素(T3、T4)水平升高;甲状腺功能减退时甲状腺激素(T3、T4)水平低于正常参考范围。另外,因为腺垂体分泌的TSH(促甲状腺激素)对甲状腺产生甲状腺激素发挥重要的调节作用(促进作用),所以甲状腺功能的检查还包括TSH的测定。
(1)血清总T3(TT3)测定:正常值1.23~3.39纳摩/升。增高见于甲亢、妊娠、急性肝炎;减低见于甲减、长期营养不良、禁食或患某些全身性疾病。分析TT3时须注意:①血清TT3小于TT4,但生理作用T3大于T4数倍;②T4必须通过转换成T3而发挥作用;③T3对甲亢诊断的敏感性优于T4。
(2)血清总T4(TT4)测定:正常值71.5~115.7纳摩/升。增高见于甲亢、妊娠,及使用雌激素、避孕药、右旋甲状腺素、甲状腺浸剂及促甲状腺素(TSH)时;减低见于甲减、低蛋白血症,及使用苯妥英钠、三碘甲状腺素、促肾上腺皮质激素(ACTH)、可的松时。分析TT4时须注意:①测定T4和TSH是诊断新生儿先天性甲减的唯一方法,优于蛋白结合碘(PBI)、131I,但也受结合球蛋白的影响;②甲减时TT4减低比T3明显,但对轻型甲亢和早期甲亢则不如T3灵敏,因而T3、T4要结合起来同时测定。
(3)血清3,3′,5′-三碘甲状腺原氨酸(rT3,又称反T3)测定:正常值0.2~0.8纳摩/升。主要用于估计甲状腺功能状况,研究甲状腺激素代谢及探讨药物的治疗机制。诊断甲亢较T3、T4灵敏,诊断甲减亦优于T3、T4、TSH。在使用甲状腺激素治疗时,若rT3、T3正常,表示药量使用得当;若rT3、T3明显升高,而T4正常或偏高,则提示药量使用过大。
(4)血清FT3和FT4(游离T3、游离T4)测定:正常值FT36.0~11.4皮摩/升,FT432.5±6.5皮摩/升。这是目前最好的甲状腺功能试验,能较正确地反映甲状腺功能。甲亢时FT3、FT4均升高,比TT3、TT4灵敏,甲减时FT4下降。
(5)血清促甲状腺激素(TSH):正常值0.35~4.95毫单位/升,甲状腺激素和TSH联合检测,可以判定甲状腺功能紊乱的原因。甲状腺激素升高伴TSH降低,多为甲状腺本身疾病引起的原发性甲亢,如弥漫性甲状腺腺肿、甲状腺腺瘤等。甲状腺激素升高伴TSH升高,多为下丘脑-垂体功能紊乱引起的继发性甲亢,如垂体肿瘤。甲状腺激素降低伴TSH升高,多为原发于甲状腺的功能减退,如慢性甲状腺炎或甲亢治疗过度等。甲状腺激素降低伴TSH降低,多为下丘脑-垂体功能受损引起的继发性甲减。
需要注意,甲状腺疾病的诊断和甲状腺功能的判定还需要医师根据患者的临床表现,结合其他必要的检查,了解甲状腺相关激素异常的具体数值,有时需重复多次进行甲状腺功能检测,综合分析才能下结论,患者阅读甲状腺功能报告单的目的是为了更好地了解病情,从而配合诊疗,切不可仅靠自己阅读报告单,凭以上简要介绍就盲目自行决定诊疗。
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