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HelpTest Code LAB20720 Aldosterone 24 Hour Urine
Department
Send Outs
Reference Lab Test Number
UALDO
Collection Requirements
Urine must be refrigerated during collection
Refer To
Primary Collection Container
24 HR Urine container
Alternate Collection Container
Random Urine: Sterile Container
Transport
Urine Frozen
Preferred Transport Temperature
Frozen
Processing
Add 1.0 g boric acid/100 mL urine mix well and send 4.5 mL aliquot boric acid preserved urine frozen in a screw-capped plastic urine container. Record total volume on test requisition and specimen label.
Alternate Specimen
6M HCl or Acetic acid preserved urine (pH adjusted to 2-4), refrigerate. Unpreserved urine frozen immediately after collection.
Stability
Room Temperature: 2 hours
Refrigerated (with preservative): 5 days
Frozen: 1 month
Minimum Testing Volume
0.5 mL
Reference Range
Reference Range
Aldosterone:
Normal 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 (24-hour): Male: Female: See Report
Methodology
Quantitative Radioimmunoassay
Performed
Tuesday, Thursday, Saturday
Reported
4-8 days
CPT Codes
82088