As an intelligent RT student or RN who wishes to learn more about how to interpret ABGs. .ABG Master made interpretations easy.Interpreting an arterial blood gas (ABG) is a crucial skill for physicians, nurses, respiratory therapists, and other health care personnel. ABG interpretation is especially important in critically ill patients. (For simplicity reasons I will only refer to the three basic ABG values in this post: pH (acid base balance), CO2 (carbon dioxide) and HcO3 (bicarbonate).