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Point of Care Testing
Pathology Lab Manual
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24 hour urine
Volume and Container
24 hour urine collection jug
Storage and Transport
Urine aliquot stored refrigerated until ready for transport to Mayo Medical Laboratory Rochester
Causes for Rejection
Specimens other than a 24 hour urine aliquot
Turn Around Time
3-15 business days from end of collection
Monday-Friday from 8 am-5 pm, except observed holidays.
CPT / HCPCS Code
Investigation of primary and secondary aldosteronism
Mayo Medical Laboratory Rochester
Test performed Monday and Thursday at Mayo Medical Laboratory Rochester
Add 25 mL of 50% acetic acid as preservative at start of collection. Use 15 mL of 50% acetic acid for children <5 years old. This preservative is intended to achieve a pH between 2 and 4
See reference lab report
Limitations and Contraindications
Spironolactone (Aldactone) should be discontinued for 4-6 weeks before testing.
Urinary aldosterone excretion >12 ug/24 hours as part of an aldosterone suppression test is consistent with hyperaldosteronism.
CPOE Test Name
Ref Misc Referral Lab Test, type Aldost U in Test Name REF
Created at 9/8/2014 5:56 PM by Bradshaw, Keir
Last modified at 9/8/2014 5:56 PM by Bradshaw, Keir
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