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肝脏疾病中的肾上腺皮质功能障碍

作者: 许芳 发布日期: 2012-05-11 阅读次数:
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有报道,对于肝硬化患者,合并败血症和感染性休克时可以出现肾上腺皮质功能减退(AI),而且与死亡率增加有关。因此,曾有人提议使用-肾上腺综合征这个名词。一些研究显示,肾上腺功能减退在肝硬化稳定期中是比较常见的,与失代偿期(比如消化道出血和腹水)一样,但是不同于败血症患者。此外,其它研究发现,肝移植受体在接受肝移植术后短时间内或一段时间后肾上腺功能减退的发生率都比较高。有些研究对危重症合并肝脏疾病的患者应用糖皮质激素治疗的效果进行了评估,但是结果仍有争议。一个国际工作组建议对危重症患者采用250ugACTH刺激试验来诊断AI。然而,对于肝病患者,采用何种恰当的试验和正常参考值去评估肾上腺功能,尚未达成共识。因此,需要对参考值和试验方法进行标准化。由于血清总皮质醇的测定往往过高估计了肝硬化患者AI的发生率,因此直接测定游离皮质醇可能更准确,但是需要进一步的试验研究。此外,肝病患者出现肾上腺皮质功能障碍的机制目前尚未完全明了。本文评估了目前有关肝硬化患者肾上腺功能的数据,着重分析了这些研究的局限性,并对以后的研究提出了建议。

 

                                 吉林大学第一医院肝胆胰内科  许芳  摘译

本文首次发表于[Hepatology. 2012;55(4):1282-1291]

 

 

Adrenocortical dysfunction in liver disease

In patients with cirrhosis, adrenal insufficiency(AI) is reported during sepsis and septic shock and is associated with increased mortality. Consequently, the term “hepato-adrenal syndrome” was proposed.Some studies have shown that AI is frequent in stable cirrhosis as well as in cirrhosis associated with decompensation other than sepsis, such as bleeding and ascites. Moreover, other studies showed a high prevalence in liver transplant recipients immediately after, or some time after, liver transplantation. The effect of corticosteroid therapy in critically ill patients with liver disease has been evaluated in some studies, but the results remain controversial. The 250-ug adreno-cortico-tropic-hormone stimulation test to diagnose AI in critically ill adult patients is recommended by an international task force. However, in liver disease, there is no consensus on the appropriate tests and normal values to assess adrenal function; thus, standardization of normal ranges and methodology is needed. Serum total cortisol assays overestimate AI in patients with cirrhosis, so that direct free cortisol measurement or its surrogates may be useful measurements to define AI, but further studies are needed to clarify this. In addition, the mechanisms by which liver disease leads to adrenal dysfunction are not sufficiently documented. This review evaluates published data regarding adrenal function in patients with liver disease, with a particular focus on the potential limitations of these studies as well as suggestions for future studies.

 

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作者: 许芳 发布日期: 2012-05-11 阅读次数: