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非甲狀腺疾病甲狀腺功能之變化

Alteration of Thyroid Function Tests in Nonthyroidal Illness

摘要


本研究以108例內科疾病患者為對象,測試其甲狀腺功能的變化。這些患者包括急性肝炎、慢性肝炎、阻塞性黃疸、腸胃道惡性腫瘤、急性呼吸衰竭、糖尿病合併酮酸血症和急性心肌梗塞。其中男性佔95例,女性佔13例,平均年齡為39.4±14.1歲。所測試的甲狀腺功能包括血清甲狀腺素、三碘甲狀腺素、游離甲狀腺素、甲促素和甲狀腺素結合球蛋白。結果顯示:急慢性肝炎之甲狀腺功能無明顯的改變,唯有甲狀腺結合球蛋白在急性肝炎患者有顯著地增加。阻塞性黃疸腸胃道惡性腫瘤患者,其血清三碘甲狀腺素較正常者偏低。此外,於急性呼吸衰竭、急性心肌梗塞和糖尿病酮酸血症患者,其血清三碘甲狀腺素亦較正常者有顯著地降低。血清甲狀腺素之變化,除糖尿病酮酸血症患者降低外,其餘尚在正常範圍內。上述引起血清三碘甲狀腺素變化之疾病,其甲促素並不呈相對性的升高,且游離甲狀腺素皆沒有變化,因此,內科急性和慢性消耗性疾病(如阻塞性黃疸或癌症)確會減少血清三碘甲狀腺素,但患者仍處於甲狀腺功能常態而非續發性甲狀腺功能不足。

並列摘要


Levels of serum thyroxine (T4), 3,5,3'-triiodothyronine(T3), thyroid stimulating hormone (TSH), free thyroxine (FT4), and thyroxine-binding globulin (TBG) were determined in patients with acute hepatitis, chronic hepatitis, obstructive jaundice, gastrointestinal malignancy, acute respiratory failure, diabetic ketoacidosis (DKA), or acute myocardial infarction (AMI). Serum TBG level increased significantly more in acute hepatitis patients than in other patients. Serum T3 concentrations decreased significantly in the patients with acute respiratory failure, DKA, AMI, obstructive jaundice, and gastrointestinal malignance. Serum T4 was low in patients with obstructive jaundice, gastrointestinal malignancy, and DKA. Serum FT4 and TSH levels were normal in all patients. The data suggested that chronic deteriorating diseases and acute nonthyroidal illness might cause alterations of thyroid physiology and thyroid function tests.

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