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Aldosterone - Urine

Source Urine
Mnemonic UALDSD and U24H
Specimen Requirements

24 hour urine collection.
No preservative. 
Refrigerate during collection.

PSC:
50 mL aliquot

RRL & extra-regional:
10 mL aliquot added to preservative (see Specimen Handling below)

Specimen Handling

Record salt intake (if provided by physician).
Record 24 hour volume and collection (start and end) dates and times on requisition.

PSC:
Send 50 mL aliquot with no preservative and unfrozen. Upon receipt in Immunochemistry, 10 mL of urine will be mixed with 0.1 gram of boric acid.

RRL & extra-regional:
After measuring volume add 10 mL of well mixed urine to a tube containing 0.1 gram boric acid (obtained from Immunochemistry at 403-770-3267).  Mix well to dissolve the boric acid.  Refrigerate until specimen is transported.

 

Additional Information  
Testing Location Immunochemistry
Testing Frequency Every 2 weeks
Alternate Name(s)
Reference Interval

Normal diet

17-69 nmol/24hrs

Low salt

47-122 nmol/24hrs

High salt

0-17 nmol/24hrs