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Test Code CLU Chloride, 24 Hour, Urine


Necessary Information


24-Hour volume (in milliliters) is required.



Specimen Required


Supplies: Sarstedt 5 mL Aliquot Tube (T914)

Collection Container/Tube: 24-Hour graduated urine container with no metal cap or glued insert

Submission Container/Tube: Plastic, 5 mL tube or a clean, plastic aliquot container with no metal cap or glued insert

Specimen Volume: 4 mL

Collection Instructions:

1. Collect urine for 24 hours.

2. Refrigerate specimen within 4 hours of completion of 24-hour collection.

Additional Information: See Urine Preservatives-Collection and Transportation for 24-Hour Urine Specimens for multiple collections.


Forms

If not ordering electronically, complete, print, and send a Renal Diagnostics Test Request (T830) with the specimen.

Useful For

Indication of fluid balance and acid-base homeostasis using a 24-hour urine collection

Method Name

Potentiometric, Indirect Ion-Selective Electrode (ISE)

Reporting Name

Chloride, 24 HR, U

Specimen Type

Urine

Specimen Minimum Volume

1 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Urine Refrigerated (preferred) 14 days
  Frozen  30 days
  Ambient  7 days

Reject Due To

  All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.

Reference Values

≥18 years: 34-286 mmol/24 hours

Reference values have not been stablished for patients who are less than 18 years of age.

 

Reference values apply to 24-hour collection.

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Test Classification

This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.

CPT Code Information

82436

LOINC Code Information

Test ID Test Order Name Order LOINC Value
CLU Chloride, 24 HR, U 43128-8

 

Result ID Test Result Name Result LOINC Value
CL24H Chloride, 24 HR, U 2079-2
TM30 Collection Duration 13362-9
VL28 Urine Volume 3167-4

Urine Preservative Collection Options

Note: The addition of preservative or application of temperature controls must occur within 4 hours of completion of the collection.

 

Ambient

OK

Refrigerate

Preferred

Frozen

OK

50% Acetic Acid

OK

Boric Acid

OK

Diazolidinyl Urea

OK

6M Hydrochloric Acid

No

6M Nitric Acid

No

Sodium Carbonate

OK

Thymol

OK

Toluene

No

Day(s) Performed

Monday through Sunday

Report Available

1 to 2 days