SODIUM, URINE, 24 HOUR

Test Code

UNA (OE), UNA24 (LAB)

CPT Codes
84300

Preferred Specimen

24 Hour Urine Container without preservative

Patient Preparation
Discard first morning urine on day of collection and note the time. Collect all urine voided during the next 24 hours. Refrigerate the urine during entire collection. See 24 hour urine collection instructions link below.

Minimum Volume

20 mL aliquot

Instructions

Mix the specimen well and measure the 24 Hour volume
RECORD THE TOTAL VOLUME
Pour off 20 mL of urine into a separate plastic screw-cap container
Refrigerate if not tested immediately

Transport Temperature

Refrigerate

Specimen Stability

2-8°C up to 3 days

Methodology
Ion Selective Electrode (ISE)

Setup Schedule

M, T, W, Th, F, Sa, Su

As received, STAT testing is available

Clinical Significance

The excretion of sodium varies with dietary intake and is affected by a diurnal variation. Decreased levels are seen in congestive heart failure, excessive sweating, diarrhea, pyloric obstruction, malabsorption and primary aldosteronism. Increased levels may be due to increased salt intake, failure of the adrenal glands, diabetic acidosis, salt losing renal disease and water deficient dehydration.

Performing Laboratory
Alverno Central Lab

Additional Information
24 Hour Urine Collection Instructions

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.