Potassium RBC


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Quest Diagnostics Test Code: 3382

Potassium is one of the main electrolytes in the body that is important to maintain healthy cell functions. Potassium helps to transport nutrients into cells and waste products out of cells. It is needed for healthy muscle and nerve communication and function. Potassium, along with the other electrolytes, help to regulate the amount of fluids in the body. A potassium rbc blood test is more accurate than a standard blood potassium test, and will show a potassium deficiency much earlier. This test is useful in the diagnosis of kidney disease, adrenal cortical insufficiency and problems with the heartbeat.

This test is performed in following conditions such as:

• Routine medical examination
• Kidney disease
• Muscle weakness
• Irregular heartbeat
• Medications like diuretics or heart medications
• High blood pressure
• Patients receiving dialysis

Also Known As: K


The Potassium RBC test has no fasting requirements.


Specimen Collected
  • Blood
Estimated Time Taken

Turnaround time for the Potassium RBC test may be up to 7 business days.