Aldosterone, Serum


Sunquest Code:ALDO  
Epic Code:LAB8081Epic Name:Aldosterone
Methodology:Chemiluminescent immunoassay
Turnaround Time:Performed and reported twice a week.


Collection Instructions

Specimen:Blood
Optimal Volume:2 mL
Minimum\Peds Volume:1.2 mL
Container:Red or gold (gel) (Purple (EDTA), Red (no gel))
Patient Preparation:Collect mid-morning after patient has been sitting, standing or walking for at least 2 hours and seated for 5-15 minutes.
Causes for Rejection:Grossly hemolyzed, icteric or lipemic samples and samples containing particulate matter or microbial contamination.


Processing and Shipping

Specimen Processing:Within 2 hours of collection, centrifuge and aliquot 1 mL, 0.5 mL minimum. Store frozen.
Shipping Instructions:Ship at frozen temperature.
Stability:5 days refrigerated; 1 month frozen.
Test Performed at or Referral Lab Specialty Core  (UMMC-East Bank)


Interpretive

Reference Range:
Age

Posture Unspecified

ng/dL

0-6 d

5.0-102.0

1-3 w

6.0-179.0

1-11 mo

7.0-99.0

1-2 y

7.0-93.0

3-10 y

4.0-44.0

11-14 y

4.0-31.0

15 y and older

31.0 or less

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.  


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