The Leeds Teaching Hospitals NHS Trust



Included in the urea and electrolytes (U&E) profile. Potassium is important for the regulation of neuromuscular excitability and cardiac contractibility. As a predominately intracellular ion, disturbances in serum/plasma potassium may result from changes in cellular distribution, intake or excretion.
Falsely elevated potassium results can occur under certain conditions e.g. if samples are not received promptly, are exposed to low temperatures or are contaminated with EDTA preservative from a FBC (full blood count) sample tube.

Tube 01 (SE) - Serum Gel
ID Tests&Tubes0095
Additional Information
Turn Around A&E: N/A
Day Case: N/A
In-Patient: 6 Hours
Out-Patient: 24 Hours
Send to Blood Sciences Cross Site
Contact For further details please contact Leeds Pathology customer services:
Collection Con Intensive care units, renal unit, transplant unit, patients on IV heparin use lithium-heparin (Green with Yellow ring) tube. Minimum volume: 500µl serum / plasma

Instructions for Lab Staff: Standard lab processing- No special requirements

Sample REQ Blood
Ref. Range Notes Blood Sciences reference ranges are available through the useful information and links page:
Units mmol/L
Telepath K1L
ICE Codes LK