Specimen Requirements
Title
POTASSIUM, RANDOM URINE
Specimen Requirement
5mL urine/screw capped plastic sterile container.
Methodology
Stability
Refrigerated: 1 week
Reference Range
By Report
Turnaround
1 DAY
Clinical Use
Test Code
UK
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)