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Aldosterone LC-MS/MS, 24 hr Urine

Test ID: ALDO U

Test

Method

LC-MS/MS

Report Includes

Volume; Sodium/L; Sodium/d; Creatinine/L; Creatinine/d; Aldosterone 24h Urine

Specimens

Urine (24 hr)

Test Location

St. Michael's Hospital, 30 Bond Street, Toronto ON M5B 1W8

Test Version

23-Feb-2022

Specimen

Specimens

Urine (24 hr)

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 2 weeks
Frozen 3 months

Additional Stability Information

Avoid freeze thaw cycles.

Rejection Criteria

Specimen Urine collected with acid.

Test Version

23-Feb-2022

Performance / Interpretation

Method

LC-MS/MS

Turnaround Time

10 days

Results

Name Units Reference Range Conversion Factor
Volume L
  • 0.600 - 1.600
mg/d x 0.00884
Sodium/L mmol/L
Sodium/d mmol/d
  • 40 - 220
mEq/d x 1.0
Creatinine/L mmol/L
Creatinine/d nmol/d
  • 7.0 - 15.0
Aldosterone 24h Urine nmol/d
Sodium:Aldosterone Reference Intervals:
Sodium excretion 0 - 200 mmol/d: Urine Aldosterone 8 - 75 nmol/d
Sodium excretion > 200 mmol/d: Urine Aldosterone < 28 nmol/d

Test Location

St. Michael's Hospital, 30 Bond Street, Toronto ON M5B 1W8

Test Version

23-Feb-2022

Interface / Setup

HL7 Interface Codes

Order Code Result Codes Units
ALDO U 7601Volume L
28021Sodium/L mmol/L
28020Sodium/d mmol/d
7637Creatinine/L mmol/L
7602Creatinine/d mmol/d
28022Aldosterone 24h Urine nmol/d

Test Version

23-Feb-2022