A B C D E F G H I J K L M N O P Q R S T U V W X Y Z #

Osmolality, Urine

Test Code
OSMOLALITY,URINE


Alias/See Also
Chemistry


Preferred Specimen
Random urine


Minimum Volume
1 mL


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.kg


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


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.