Study on the Diagnostic Cut-off Point of 24-hour Urinary Aldosterone Measured by Liquid Chromatography-Tandem Mass Spectrometry in the Diagnosis of Primary Aldosteronism in the Oral Sodium Loading Test
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- What is being studied
- The protocol lists: The oral sodium loading test.
- Who it may be relevant to
- Registry conditions: Primary Aldosteronism. Basic parameters: 18 years — 70 years · All.
- What needs checking
- Age, condition and sex are only basic indicators. Prior treatment, laboratory values and other mandatory requirements appear in the eligibility criteria below.
- Where it takes place
- China
- Next step
- Save the trial, show it to the treating physician, and confirm current recruitment with the study center. Costs, documents and travel →
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Overview
Primary aldosteronism (PA) is the most common cause of secondary hypertension. Liquid chromatography - tandem mass spectrometry (LC-MS/MS) is more accurate than the traditional radioimmunoassay in measuring aldosterone. This study aims to establish a more precise diagnostic threshold for the oral sodium loading test (OSLT) by using LC-MS/MS to measure urinary aldosterone levels. We will combine the biochemical results of OSLT and other data from healthy volunteers and suspected PA patients to determine a new 24-hour urinary aldosterone threshold. We expect to improve the diagnostic accuracy of PA, helping clinicians identify this curable cause of hypertension earlier and more accurately, and achieving precise treatment.
Interventions
- Diagnostic test The oral sodium loading test
These subjects underwent a three-day high-salt diet test, during which they consumed an additional 6-10 grams of salt each day. On the third day, tests were conducted on the aldosterone, sodium, potassium and creatinine levels in the 24-hour urine, blood potassium, creatinine, standing aldosterone concentration, plasma renin activity, and the steroid hormone profile.
Primary outcome measures
- 24-hour urinary aldosterone levels after a 3-day high-sodium diet [Time frame: Two weeks after completing the oral sodium loading test]
Eligibility criteria
Inclusion criteria for the normal control group: Age 18-70 years old, BMI: 18.5-23.9kg/m ²，gender not restricted. blood pressure: 100-120/60-80mmHg. no history of hypertension. No abnormal nodules found in adrenal CT. Previous blood potassium and electrocardiogram were all within normal ranges., No history of liver or kidney dysfunction, malignant tumors, metabolic diseases or cardiovascular diseases, and no medication used.
Exclusion criteria: Those with a family history of hypertension or with clinical manifestations of secondary hypertension. Those who have been taking drugs that may affect the RAAS system for a long time (such as contraceptives, steroids, etc.). Those with cardiac dysfunction or severe arrhythmia and unable to tolerate the test.
Patients with suspected primary aldosteronism in the outpatient setting. Inclusion criteria: Patients with suspected primary aldosteronism in the outpatient setting. Willing to undergo 4-week spironolactone treatment and cooperate with follow-up.
Exclusion criteria: Patients who did not complete the oral sodium loading test. Patients with Cushing's syndrome or other endocrine tumors. Patients allergic to spironolactone or with contraindications for its use (such as severe hyperkalemia, eGFR < 30).History of liver or kidney dysfunction, coexisting severe cardiovascular or cerebrovascular diseases, history of malignant tumors, other types of endocrine hypertension (hyperthyroidism, pheochromocytoma, Cushing's syndrome, etc.), renal artery stenosis, hypokalemia caused by other factors (renal tubular acidosis, Bartter syndrome, Gitelman syndrome, etc.), diabetes with HbA1c > 7.0% or currently using or having used insulin or SGLT2 inhibitor drugs, taking special medications such as glucocorticoids, immunosuppressants, oral contraceptives, etc.
Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.
Healthy volunteers: Yes
Study design
- Observational model
- Cohort
Study locations
China · 1 center
- Peking Union Medical Colledge Hospital — Beijing
Identifiers
NCT: NCT07635134 · pumch-06086-10