Diagnosis of Aldosteronism
On the consistency of different methods for detecting aldosterone concentration in blood
Fengfan Zheng, Ying Song, Shumin Yang, Jinbo Hu, Wenwen He, Zhihong Wang, Qingfeng Cheng, Qifu Li
Published 2019-11-25
Cite as Chin J Endocrinol Metab, 2019, 35(11): 934-938. DOI: 10.3760/cma.j.issn.1000-6699.2019.11.003
Abstract
ObjectiveTo evaluate the consistency of different methods for detecting aldosterone concentration in blood and to establish a reference interval of serum aldosterone concentration by liquid chromatography-tandem mass spectrometry(LC-MS/MS).
MethodsConcentrations of blood aldosterone were measured by LC-MS/MS, chemiluminescent assays (Diasorin, Domestic A and B systems) and radioimmunoassay (RIA) in 138 healthy adults, 67 patients with essential hypertension and 23 patients with primary aldosteronism.
ResultsAldosterone concentrations measured by various methods were quiet different(P<0.01). Spearman correlation analysis showed that the correlation coefficient were 0.776(P<0.01) between CLIA (Diasorin) and LC-MS/MS, 0.805(P<0.01) between CLIA (Domestic A) and LC-MS/MS, 0.058(P>0.05) between CLIA(Domestic B) and LC-MS/MS, 0.338(P<0.01) as well as between RIA and LC-MS/MS. Bland-Altman analysis for the measurements showed poor consistency among methods for aldosterone concentrations. The reference interval was 15.2-222.2 pg/ml for serum aldosterone concentrations by LC-MS/MS.
ConclusionsThere are significant differences of blood aldosterone concentrations determined by different methods. Clinically, a specified reference interval might be needed while using different methods.
Key words:
Aldosterone; Liquid chromatography-tandem mass spectrometry; Chemiluminescent assays; Radioimmunoassay
Contributor Information
Fengfan Zheng
Department of Endocrinology, the First Affiliated Hospital of Chongqing Medical University, The Chongqing Key Laboratory of Translational Medicine in Major Metabolic Diseases, the First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
Ying Song
Shumin Yang
Jinbo Hu
Wenwen He
Zhihong Wang
Qingfeng Cheng
Qifu Li