k (potassium, serum)
ElectrolyteBlood sampleResults 24 hrsNo fasting
K (Potassium, Serum)
Potassium is an essential electrolyte vital for heart rhythm, muscle function, and nerve signals. This test checks whether your potassium level is within a healthy range.
Sample
Blood
Results
24 hrs
Fasting
Not required
Follow-up
Optional add-on
What this test detects
Potassium
Ion-selective electrode · serum
Quantitative · mmol/L
When to get this test
Heart and muscle function
Both high and low potassium can affect heart rhythm and muscle activity, making this an important safety check.
Kidney function
The kidneys regulate potassium, so this test helps monitor kidney health.
Medication monitoring
Useful for people on diuretics or other medicines that can shift potassium levels.
How to prepare
01
No special preparation needed.
Common questions
Why is potassium important?
Potassium keeps your heart beating steadily and your muscles and nerves working properly. Levels that are too high or too low can be serious, so it's commonly monitored.
Can my result be affected by the blood draw?
Yes, factors during sample handling can sometimes affect potassium readings. If a result looks unexpected, your provider may recommend a repeat test.