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Test & Collection Guide

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PLEASE NOTE: Recent changes have been made to this Test


 Recent changes for Urine Aldosterone and Sodium - 24 hour (Oral salt loading test)

Recent changes for Urine Aldosterone and Sodium - 24 hour (Oral salt loading test)

Date
Field
Changed From
Changed To
23rd April 2025
Assay name

Aldosterone - urine

Urine Aldosterone and Sodium - 24 hour

Collection & Request Instructions

24-hour urine collection in acid bottle

Keep refrigerated during collection and send to laboratory immediately on completion

Patient Collection Instructions

24-hour urine collection in acid bottle. Aldosterone and Sodium must be tested from the same ACID bottle.

DO NOT issue a separate24-hour plain bottle for urine sodium.

If unsure, confirm with the lab before advising recollection.

Keep refrigerated during collection and send to laboratory immediately on completion

Patient Collection Instructions

19th March 2025
Alternative names

24-hour aldosterone, 24 hour urine aldo

Processing Instructions

Aldosterone excretion is physiologically inversley related to sodium status and must be interpreted in relation to sodium secretion.

Aldosterone excretion is physiologically inversley related to sodium status and must be interpreted in relation to sodium excretion. Sodium and Aldosterone assay performed on same collection by referral lab.

Urine Aldosterone and Sodium - 24 hour (Oral salt loading test)

Ordering information:

Aldosterone excretion is physiologically inversely related to sodium status and must be interpreted in relation to sodium excretion. Sodium and Aldosterone assay performed on same collection by referral lab.

Alternate names:
24 hour urine aldo, 24-hour aldosterone
Laboratory:
Referred Test
Test Code:
UALDX
Specimen types:
24 hour Urine
Container types:
24-hour urine - ACID bottle24-hour urine - ACID bottle
Collection Instructions:

24-hour urine collection in acid bottle. Aldosterone and Sodium must be tested from the same ACID bottle.

DO NOT issue a separate24-hour plain bottle for urine sodium.

If unsure, confirm with the lab before advising recollection.

Keep refrigerated during collection and send to laboratory immediately on completion

Patient Collection Instructions

Frequency:
Weekly
Result Turnaround Time:
10-14 days
Reference Interval:

3-78 nmol/day

Laboratory Use Only
Storage Instructions:

Aldosterone excretion is physiologically inversley related to sodium status and must be interpreted in relation to sodium excretion. Sodium and Aldosterone assay performed on same collection by referral lab.

Laboratory Notes:

24 hour urine, acid bottle. A 50 mL aliquot is sent with the recorded total 24 hrs volume.

An extra 50 mL aliquot needs to be stored.

External Laboratory:
Monash Pathology
 External Laboratory details...

Pathology Handbook

Test & Collection Guide