A healthcare provider may order a Carbon Dioxide (CO2) blood test to:
Evaluate acid-base balance: CO2 levels in the blood help evaluate the acid-base balance in the body. CO2 levels are inversely related to blood pH, so a low CO2 level indicates high acidity, while a high CO2 level indicates low acidity.
Monitor respiratory function: CO2 levels in the blood can help monitor respiratory function. Abnormal CO2 levels can indicate respiratory disorders such as chronic obstructive pulmonary disease (COPD) or asthma.
Assess kidney function: CO2 levels in the blood are also used to evaluate kidney function. Kidney disease can cause CO2 levels to be low or high.
Diagnose and monitor treatment of certain medical conditions: CO2 levels in the blood can help diagnose and monitor treatment for medical conditions such as heart failure, uncontrolled diabetes, or metabolic imbalances.
Your healthcare provider may recommend a CO2 blood test as part of a routine check-up or if you are experiencing symptoms that may indicate an acid-base imbalance, respiratory disorder, or kidney disease.