ARUP's Laboratory Test Directory

Aldosterone, Urine : 0070480

Mnemonic: ALDO U

Methodology: Quantitative Radioimmunoassay
Performed: Tue, Thu, Sat
Reported: 2-5 days
Specimen Required: Collect: 24-hour urine. Urine must be refrigerated during collection.

Specimen Preparation: Add 1 g boric acid per 100 mL urine. Transfer 4 mL aliquot of urine from a 24-hour collection to an ARUP Standard Transport Tube. (Min: 0.5 mL) Record total volume and collection time interval on transport tube and test request form. Also acceptable: Preserved urine if the pH of the specimen is adjusted to 2-4 with 6M HCl or 50 percent acetic acid or unpreserved urine if frozen immediately after collection.

Storage/Transport Temperature: Frozen. Also acceptable: Refrigerated, if preserved with HCl or acetic acid.

Stability (collection to initiation of testing): Ambient: 2 hours; Refrigerated (with preservative): 1 week; Frozen: 1 month

Reference Interval:
Effective February 19, 2013
 
Test Number Components Reference Interval
 Aldosterone, UrineNormal diet: 6-25 µg/d
Low salt diet: 17-44 µg/d
High salt diet: 0-6 µg/d

Normal urine values of aldosterone are dependent on sodium intake.

Normal sodium intake: 100-200 mEq
Low sodium intake: < 25 mEq
High sodium intake: > 200 mEq
 Creatinine, Urine - per 24h  
 
Age Male Female
3-8 years 140-700 mg/d 140-700 mg/d
9-12 years 300-1300 mg/d 300-1300 mg/d
13-17 years 500-2300 mg/d 400-1600 mg/d
18-50 years 1000-2500 mg/d 700-1600 mg/d
51-80 years 800-2100 mg/d 500-1400 mg/d
81 years and older 600-2000 mg/d 400-1300 mg/d

CPT Code(s): 82088