Serum or Plasma Bicarbonate Concentration (Metabolic Acidosis/Baseline Electrolyte Profile)

Why This Test Might Be Ordered

Your doctor may order this test if you have symptoms like fatigue, confusion, or shortness of breath, or if they suspect conditions like kidney disease, diabetes, or heart failure. It’s also part of routine monitoring for patients with chronic illnesses or those taking medications that affect acid-base balance.

What to Expect Before the Test

No special preparation is usually needed, but you may be asked to fast for 8–12 hours before the test if it’s part of a fasting profile. Bring any medications you’re currently taking to your appointment.

How the Test Is Performed

A healthcare provider will draw blood from a vein in your arm using a small needle. The blood sample is then sent to a lab for analysis. The test typically takes a few minutes, and you may feel a slight pinch during the draw.

What the Results Mean

Results help determine whether your body’s acid-base balance is normal or if there’s an imbalance (such as too much or too little bicarbonate). Low levels may indicate metabolic acidosis, while high levels could suggest metabolic alkalosis. Your doctor will discuss these findings in relation to your overall health.