什么是LDH?这个指标高有什么影响?

2024-12-02 05:03:59
推荐回答(1个)
回答1:

什么是乳酸脱氢酶(LDH:Lactic Dehydrogenase )?
有时肝脏科医生要给肝病患者测定LDH.
LDH-乳酸脱氢酶是糖酵解过程中一种重要的酶,任何原因引起的肝细胞损伤均可因LDH逸出,引起血清LDH活力增加.急性肝炎或慢性肝炎活动期LDH常显著或中度增加,其临床意义大致与ALT、AST一致,但有人认为LDH反映肝细胞损害的灵敏度略逊于ALT.从发病到肝炎恢复期,LDH为最早恢复的酶.如果在疾病后期,病人未进行剧烈体力活动而LDH进行性升高或反复波动,常提示有某种并发症存在.故反复,定期,固定测定LDH有助于观察病情.特别是肿瘤组织中糖酵解速度明显高于正常组织,故肝癌时血清LDH活力明显升高.在肝硬化患者,如在病程中发现LDH增加,应疑及并发肝癌,再结合AFP,图像,穿刺可以早期判断病变.
但是血清LDH测定对肝病缺乏特异性,当含有LDH的心肌、肾、血细胞和肠等组织损伤时,LDH也会升高,如见于心肌梗塞、肺梗塞、进行性肌营养不良、肌炎、溶血性贫血、恶性贫血、白血病、肝以外恶性肿瘤等,这时结合其它指标可排除/考虑病因.

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