Bicarbonate Level

A bicarbonate test measures the amount of bicarbonate in your blood. Bicarbonate is a base that helps keep your body’s acid-base balance steady. It is the main form in which carbon dioxide travels in the bloodstream, working closely with your lungs and kidneys to keep your blood pH within a healthy range.

This test is commonly included in a basic or comprehensive metabolic panel. It provides a snapshot of how your body is handling acids and bases at the time of the blood draw.

Bicarbonate helps clinicians assess acid-base status, which can be disrupted by conditions affecting breathing, kidney function, or fluid balance. It is often checked when you have symptoms such as shortness of breath, confusion, nausea, or when you are being evaluated for illnesses like kidney disease, diabetes complications, or lung disorders.

Results can guide treatment decisions in clinics, emergency departments, and hospitals. Tracking bicarbonate over time can show whether therapies, such as diuretics or treatments for infections or kidney problems, are helping restore a healthy acid-base balance.

A lower bicarbonate result generally suggests that your blood is more acid than it should be, which can occur with kidney problems, severe infections, certain poisonings, or diarrhea. A higher result can occur when you lose acid or gain base, such as with vomiting, some water pills, or the body’s response to long-standing lung disease.

Your care team will interpret your result together with your symptoms, other electrolytes, kidney tests, and sometimes a blood gas measurement. If a result is unexpected, they may repeat the test, review your medicines and supplements, and order additional studies to identify the cause and choose the best next steps.