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Test Code URNATT or LAB445 Sodium, 24-hour, Urine

Profile Information

Test ID

Reporting Name

Always Performed?

Available Separately?

URNATT

Sodium, 24-Hour, Urine

Y

N
UNAR

Sodium, Random Urine

Y

Y

Coll Dur

Collection Duration

Y

N

Ur Vol

Urine Volume

Y

N

Specimen Requirements

Container Type:

 

24-hour urine container

 

   

 
Optimal Collection Volume: 

Entire Collection
Minimum Volume:

Entire Collection
Collection Instructions:
  1. Please click the Mayo link for a complete list of acceptable preservatives.
  2. Refrigerate the container during the collection period.
  3. The 24-hour volume is required.
  4. The start and end dates and times of collection are required.
  5. Please click the Urine Collection and Patient Instructions for 24-Hour Urine Collection links for additional collection instructions.
Specimen Transport:

Refrigerate

Processing Instructions: 
  1. Measure and record the total volume of the urine collection.
  2. Vigorously shake the entire urine container to ensure that all its contents are adequately mixed.
  3. Pour off a portion of the urine into a false bottom tube.
  4. Centrifuge the false bottom tube. 

Specimen Stability

Specimen Type

Temperature

Time

Urine

Refrigerated

14 days

Room Temperature

14 days

Specimen Rejection Criteria

No total volume recorded or no start and end times.

Useful For

Assessing acid-base balance, water balance, water intoxication, and dehydration

Methodology

Roche Cobas - Potentiometric, indirect ion-selective electrode

Reference Ranges

75-200 mmol/24 hour

Day(s) Performed

24/7

Expected TAT

Same day

Performing Laboratory

Bronson Laboratory, Chemistry - Kalamazoo and Battle Creek

Sample Retention Time

7 days

CPT Code

  • Sodium - 84300
  • Volume measurement - 81050

LOINC Code

2955-3