Final answer:
A nurse or a doctor typically draws an arterial blood gas (ABG), as they have the necessary skills and expertise required for this complex procedure.
Step-by-step explanation:
An arterial blood gas (ABG) is typically drawn by a nurse or a doctor. These healthcare professionals have the required expertise to perform this procedure, as they have a deep understanding of the circulatory system and the technical skills to draw blood from an artery, which is a more complex procedure than drawing venous blood. Phlebotomists, while skilled in venipuncture and capillary sticks, are generally not the professionals who perform ABG draws. This procedure is undertaken for measuring blood gases such as pH, CO2 partial pressure (pCO2), and bicarbonate (HCO3), to aid in assessing a patient's respiratory and metabolic function and to guide treatment.