Sodium, Urine Timed

Message

Performing Lab: Central Lab, Regions, Westfields

Test Code

3770

Alias/See Also

Sunquest: UNAT

CPT Codes
84300

Preferred Specimen

0.2 mL of a timed urine collection

Minimum Volume

0.1 mL

Instructions

Preserve timed urine collection with refrigeration.

Consult Urine Collection/Processing Information for acceptable preservatives

Transport Container

Sterile Container

Transport Temperature

Refrigerated

Specimen Stability

Room Temperature: 24 hours
Refrigerated: 7 days
Frozen: 6 months

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Unacceptable preservatives

Methodology
Potentiometric

Setup Schedule

Hospital: Daily
Clinics: Monday - Friday

Report Available

Same Day

Reference Range

No reference range established

Clinical Significance

Sodium (Na) is the primary extracellular cation. Sodium is responsible for almost one half the osmolality of the plasma and, therefore, plays a central role in maintaining the normal distribution of water and the osmotic pressure in the extracellular fluid compartment. The amount of Na in the body is a reflection of the balance between Na intake and output. The body requires only 1-2 mmol/day, and the excess is excreted by the kidneys, which are the ultimate regulators of the amount of Na (and thus water) in the body.

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.