ARUP's Laboratory Test Directory

Aldosterone, Serum : 0070015

Mnemonic: ALDOST

Methodology: Quantitative Radioimmunoassay
Performed: Sun-Sat
Reported: 2-4 days
Specimen Required: Patient Prep: If upright specimen is collected, patient should be seated or standing for at least 2 hours.

Collect: Serum separator tube or plain red.

Specimen Preparation: Transfer 1 mL serum to an ARUP Standard Transport Tube. (Min: 0.75 mL) Also acceptable: Heparinized plasma.

Storage/Transport Temperature: Frozen.

Unacceptable Conditions: EDTA plasma.

Stability (collection to initiation of testing): After separation from cells: Ambient: 4 hours; Refrigerated: 1 week; Frozen: 1 month
Reference Interval:
Effective May 16, 2011
 
Age Posture Unspecified Supine Upright
0-6 days 5.0-102.0 ng/dL   
1-3 weeks 6.0-179.0 ng/dL   
1-11 months 7.0-99.0 ng/dL   
1-2 years 7.0-93.0 ng/dL   
3-10 years 4.0-44.0 ng/dL   
11-14 years 4.0-31.0 ng/dL   
15 years and older Less than or equal to 31.0 ng/dL Less than or equal to 16.0 ng/dL 4.0-31.0 ng/dL

Interpretive Data: Normal serum levels of aldosterone are dependent on the sodium intake and whether the patient is upright or supine. High sodium intake will tend to suppress serum aldosterone, whereas low sodium intake will elevate serum aldosterone. The reference intervals for serum aldosterone are based on normal sodium intake.
CPT Code(s): 82088