Specimen Requirements
Title
Electrolytes, Random Urine
Specimen Requirement
Collect random urine in sterile container.
Methodology
Stability
Refrigerated: 1 week
Reference Range
Turnaround
1 day
Clinical Use
Test Code
EPU
Thyroid Testing Update: Effective 02/01/2026, T3 Uptake will be discontinued and replaced with Free T4 testing. Free T4 more directly reflects active thyroxine levels and supports clearer clinical interpretation than older, indirect binding assessments. (Click here for more information)