Bicarbonate concentration in blood (serum/plasma)

What Does This Test Measure?

Bicarbonate is a critical buffer in your blood, helping maintain a stable pH level. Your body produces bicarbonate naturally, and it plays a role in how your kidneys and lungs regulate acid-base balance. Abnormal levels can indicate conditions affecting your metabolism, kidney function, or breathing.

Why Might You Need This Test?

Doctors may order this test if you have symptoms like fatigue, confusion, shortness of breath, or muscle cramps. It’s also used to diagnose or monitor conditions such as metabolic acidosis or alkalosis, kidney disease, or respiratory disorders.

How Is the Test Done?

A small blood sample is drawn from a vein in your arm. The sample is sent to a lab where it’s analyzed to measure bicarbonate levels. No special preparation is needed, but fasting may be required depending on your specific test instructions.

What Are Possible Results?

Results are typically reported in milliequivalents per liter (mEq/L). While reference ranges vary by lab, low levels may suggest metabolic acidosis, while high levels could indicate metabolic alkalosis or other conditions.