 Welcome to Arterial Blood Gas. This learning object will explain what the values of an arterial blood gas mean. Coming up we have a few definitions. Please pause the video if you need extra time to review them. The normal values for an arterial blood gas are shown below. The key is to maintain the pH within a balance of 7.35 to 7.45. The partial concentration of carbon dioxide in the blood breaks down in the body to acid and water. The normal partial concentration of carbon dioxide in the blood is 35 to 45. Bicarbonate and base excess buffer and neutralize. Normal bicarbonate is 22 to 26. Normal base excess is negative 2 to positive 2. PO2 is the concentration of oxygen, a nice stat to know, but not essential for arterial blood gas analysis. Congratulations! You have completed the learning object for arterial blood gas.