Sign in →

Test Code LAB77 Sodium, 24 Hour, Urine

Additional Codes

Test Name in EPIC EPIC Test Code Mnemonic
SODIUM, 24HR UR LAB77 U24NA

 

Useful For/Utility

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

Methodology

Ion-Selective Electrode Diluted (Indirect)

Clinical Information

Sodium is the major cation of extracellular fluid; it plays an essential role in the normal distribution of water and in the maintenance of osmotic pressure in extracellular fluid compartments. Decreased levels of sodium may be caused by an excessive use of diuretics, prolonged vomiting, a decrease in the intake of sodium in the diet, and metabolic acidosis. Increased levels of sodium may be found in Cushing’s syndrome, severe dehydration, or in high levels of salt intake without an adequate supply of water.

Specimen Requirements

Specimen Type: Urine, 24-hour

Container/Tube: Aliquot tube

Specimen Volume: 5 mL

Specimen Minimum Volume: 2 mL

Collection Instructions:

1. No preservative. Mix well.

2. See Urine Collection in Special Instructions for 24-hour urine collection instructions.

Additional Information: Starting and ending times of collection and 24-hour volume are required.
 

Performing Laboratory

Measure 24-hour volume. Enter volume and hours of collection into LIS. If specimen is cloudy/bloody spin and separate supernatant. Refrigerate specimen until analysis is performed.

Specimen Transport Temperature

Refrigerate 5 days/Frozen OK/Ambient NO

Day(s) Test Set Up

Monday through Sunday

Performing Laboratory

Chemistry-

St. Joseph's Medical Center Lab

Deer River Hospital Lab, Hibbing Clinic Lab, Moose Lake Hospital Lab, SMDC Clinical Lab, St. Mary's Hospital - Superior Lab, Virginia Hospital Lab

Fargo Hospital Lab

Test Classification and CPT Coding

84300

Reference Values

40-220 mEq/24 hours

Special Instructions