盐水负荷试验对原发性醛固酮增多症的诊断价值
2016-07-26王立雪母义明巴建明窦京涛吕朝晖王先令杜锦杨国庆陆菊明
王立雪,母义明,巴建明,窦京涛,吕朝晖,王先令,杜锦,杨国庆,陆菊明
盐水负荷试验对原发性醛固酮增多症的诊断价值
王立雪*,母义明,巴建明,窦京涛,吕朝晖,王先令,杜锦,杨国庆,陆菊明
摘要
目的:评价盐水负荷试验对于原发性醛固酮增多症(PHA) 的诊断价值。
方法:回顾性分析1994-06至2012-05我院72例PHA患者(PHA组)和44例排除PHA的原发性高血压(EH)患者(EH组)的临床资料。并应用受试者工作曲线(ROC曲线)对盐水负荷试验前后血浆醛固酮水平及试验后血浆醛固酮/肾素活性比值进行评价,分析其诊断效能,得出最佳诊断切点。
结果:试验后血浆醛固酮水平ROC曲线下面积为0.759,敏感性为74.6%,特异性为63.6%。试验后血浆醛固酮/肾素活性比值ROC曲线下面积为0.899,敏感性为83.6%,特异性为88.6%,最佳诊断切点为111[ng/dl:ng/(ml·h)]。
结论:盐水负荷试验后血浆醛固酮水平及血浆醛固酮/肾素活性比值,对于PHA均有诊断价值,试验后血浆醛固酮/肾素活性比值诊断效能更高。
关键词 醛固酮增多症;盐水输注试验;诊断
Objective: To evaluate the diagnostic value of saline infusion test (SIT) in patients with primary aldosteronism (PHA).
Methods: A total of 116 patients with PHA or essential hypertension (EH) treated in our hospital from 1994-06 to 2013-05 were retrospectively studied. The patients were divided into 2 groups: PHA group, n=72 and EH group, the patients with excluded PHA, n=44. post-SIT plasma levels of aldosterone and post-SIT ratio of aldosterone/renin activity were evaluated by ROC curve in order to analyze the diagnostic capability and the best diagnostic cut-off point.
Results: The area under curve (AUC) by ROC for post-SIT aldosterone level was 0.759, the sensitivity and specificity were 74.6% and 63.6% respectively; AUC for post-SIT ratio of aldosterone/renin activity was 0.899, the sensitivity and specificity were 83.6% and 88.6% with the best diagnostic cut-off point at 111 [ng/dl:ng/(ml·h)].
Conclusion: Post-SIT plasma level of aldosterone and post-SIT ratio of aldosterone/renin activity had the diagnostic value of PHA; post-SIT ratio of aldosterone/renin activity had the higher diagnostic value of PHA.
Key words Hyper aldosteronism; Saline load test; Diagnosis
(Chinese Circulation Journal, 2016,31:604.)
盐水负荷试验是临床应用最广泛的原发性醛固酮增多症(PHA)确诊试验之一。正常情况下,盐水输注试验可以通过肾素-血管紧张素-醛固酮系统抑制醛固酮分泌,但对于自主性分泌醛固酮的PHA患者,盐水负荷试验对醛固酮无明显抑制作用,该方法可用于区分PHA和原发性高血压(EH)。为此,本研究对PHA及EH两组患者进行比较,应用受试者工作曲线(ROC曲线)评价盐水负荷试验对PHA的诊断价值,并找出敏感性和特异性均较高的诊断切点。
