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ALDUR/ALDU-M
ALDOSTERONE 24 HOUR URINE

Test Code ALDUR/ALDU-M 
Test ALDOSTERONE 24 HOUR URINE 
Methodology Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS) 
Description Useful for investigation of primary aldosteronism (eg, adrenal adenoma/carcinoma and adrenal cortical hyperplasia) and secondary aldosteronism (renovascular disease, salt depletion, potassium loading, cardiac failure with ascites, pregnancy, Bartter syndrome) 
Specimen 10 mL from a 24-hour urine collection.
Add 25 mL of 50% acetic acid as preservative at start of collection. Use 15 mL of 50% acetic acid for children <5 years old. This preservative is intended to achieve a pH of between approximately 2 and 4. 
Reference Values 0-30 days: 0.7-11.0 mcg/24 hours*
31 days-11 months: 0.7-22.0 mcg/24 hours*
> or =1 year: 2.0-20.0 mcg/24 hours

*Loeuille GA, Racadot A, Vasseur P, Vandewalle B: Blood and urinary aldosterone levels in normal neonates, infants and children. Pediatrie 1981;36:335-344 
Analytic Time 2-3 Days 
Day(s) Test Set Up Monday, Thursday; 3 p. m. 
CPT Code(s) 82088