Helping you understand arterial blood gas (ABGs) and teach you the tic-tac-toe interpretation method that is super easy and fun! Blood Gas Analysis and it’s Clinical Interpretation Dr R.S.Gangwar MD, PDCC, FIPM Assistant Professor Introduction: 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. The following six-step process helps ensure a complete interpretation of every ABG. Arterial blood gases ( ABG 's) is a blood test that is used to give an indication of ventilation, gas exchange, and acid-base status and is taken from an arterial blood supply [1]. The arterial blood gas test is one of the most common tests performed on patients in intensive care units.