Potassium Level*
Methodology
Ion-Selective Electrode (ISE)
Performing Laboratory
Rutland Regional Medical Center Laboratory
Specimen Requirements
Specimen Type: Blood
Container/Tube:
Preferred: Light-green top (lithium heparin gel)
Specimen Fill Volume: Full tube
Specimen Minimum Volume: 2 mL
Collection Instructions:
1. Send specimen in original tube.
2. If there is a delay in transport of >1 hour, centrifuge tube.
Specimen Transport Temperature
Refrigerated
Normal Reference Values
3.5-5.1 mEq/L
Day(s) Performed
Daily
Analytical Time:
1 day
Available Stat
Test Classification and CPT Coding
84132
Critical Values
<2.5 mEq/L or >6.0 mEq/L (automatic call-back)