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Vol 71, No 1 (2020)
Original paper
Published online: 2019-11-04

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The aldosterone index could be used to diagnose the dominant gland in primary aldosteronism — a retrospective study

Shen-Zhuo Liu1, Liang Zhou1, Tao Chen2, Zhi-Hong Liu1, Zheng-Ju Ren1, Yu-Chun Zhu1
Pubmed: 31681973
Endokrynol Pol 2020;71(1):42-50.


Introduction: Failed cannulation in the right adrenal vein, which makes the sampling results in the contralateral vein and inferior vena cava (IVC) nonsense, is the main obstacle of using adrenal vein sampling (AVS) in the lateralisation diagnosis in primary aldosteronism (PA). We performed a retrospective study to evaluate the specificity and sensitivity of using the aldosterone index (AI) in PA lateralisation diagnosis.

Material and methods: We enrolled 116 patients who were diagnosed with PA and then underwent AVS in the West China Hospital of Sichuan University from April 2015 to April 2017. The AI, calculated by dividing the aldosterone concentration of the failed side by the aldosterone concentration of IVC, was used for lateralisation diagnosis if the cannulation was judged to be failed by traditional method. Patients with dominant adrenal gland based on successful AVS were included in subgroup 2 (n = 75), while the patients diagnosed with a dominant gland using AI method were enrolled in subgroup 1 (n = 41).

Results: No significant difference of clinical and biochemical findings between the two groups was detected (p value after operation > 0.05). ROC analysis was performed to test the specificity and sensitivity based on the AI in subgroup 2. The AUC for dominant gland detection was 0.76, which resulted in 91.3% sensitivity and 67.53% specificity. The positive and negative likelihood ratios were 2.81.

Conclusions: Our data suggested that the modified strategy using AI to diagnose the dominant gland in PA is an efficient method when cannulation has failed in the right side.

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