Osmolality, 24 Hr Urine Panel

Test Code

OSMO,24HR PANEL

Alias/See Also

Chemistry

Preferred Specimen

24 Hr urine collection

Instructions

Preservative: None

Refrigerate during collection.

Transport Temperature

Refrigerate

Specimen Stability

Room temperature: 24 hours
Refrigerated (2-8°C): 24 hours

Methodology
Freezing point measurement

Setup Schedule

Batched

Report Available

TAT 1 day

Reference Range

300-1000 mOsm/K H2O

Clinical Significance

This test is useful in the diagnosis and management of fluid and electrolyte disorders. Osmolality measures the moles of a nonelectrolyte substance dissolved per kilogram of pure water. Urine osmolality is a measure of solute concentration in the urine, and reflects the concentrating ability of the kidneys. The major factor modulating urine osmolality is vasopressin (antidiuretic hormone) and the urine-concentrating apparatus of the kidney, which responds to it.

Performing Laboratory
Test performed at West Roxbury Chemistry Lab
Contact: Jonathan Dryjowicz-Burek 857-203-5973

Additional Information
Collection of 24 Hour Urines or Timed Urines

Last Updated: April 8, 2019

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.