Test Overview
Method
Liquid chromatography-tandem mass spectrometry (LC-MS/MS)
Result Included
Volume; Sodium/L; Sodium/d; Creatinine/L; Creatinine/d; Aldosterone 24h Urine
Specimen
Specimen Type
Urine (24 hr)Volume
Sample Volume
10 mL
Collection & Handling
Collection Instructions
Collect 24 hour urine in container without preservative and keep refrigerated or on ice during collection.
Handling Information
Store and send frozen.
Additional Information
Provide Collection Date and Collection Volume (litres). Identify drugs administered within 2 weeks as some drugs have a low cross-reactivity in this assay.
Stability
| Refrigerated | Frozen |
|---|---|
| 2 weeks | 3 months |
Avoid freeze thaw cycles.
Rejection Criteria
| Criteria | Specification |
|---|---|
| Specimen | Urine collected with acid. |
Performance & Interpretation
Turnaround Time
10 days
Results
Name
Units
Reference Range
Conversion
-
VolumeL0.600 - 1.600mg/d x 0.00884
-
Sodium/Lmmol/L
-
Sodium/dmmol/d40 - 220mEq/d x 1.0
-
Creatinine/Lmmol/L
-
Creatinine/dnmol/d7.0 - 15.0
-
Aldosterone 24h Urinenmol/d
Comment
Sodium:Aldosterone Reference Intervals:
Sodium excretion 0 - 200 mmol/d: Urine Aldosterone 10 - 105 nmol/d
Sodium excretion > 200 mmol/d: Urine Aldosterone < 39 nmol/d
Referral Location
Canada
Interface & Setup
HL7 Interface Codes
| Order Code | Result Name | Result Codes | Units |
|---|---|---|---|
| ALDO U | Volume | 7601 | L |
| Sodium/L | 28021 | mmol/L | |
| Sodium/d | 28020 | mmol/d | |
| Creatinine/L | 7637 | mmol/L | |
| Creatinine/d | 7602 | mmol/d | |
| Aldosterone 24h Urine | 28022 | nmol/d |
Test Version
Last Updated
2024-04-25