Which measurement is used to express calculated oxygen content?

The correct measurement for expressing calculated oxygen content is milliliters per deciliter (mL/dL). This unit quantifies the amount of oxygen dissolved in the blood, providing a clear indication of oxygen saturation and its availability for metabolic processes in the body. When physicians need to assess a patient's oxygen delivery, they often refer to the arterial oxygen content, which is typically specified in mL/dL.

Using this standardized measurement allows healthcare professionals to evaluate a patient's respiratory function and the effectiveness of their oxygen therapy. It facilitates comparisons between patients and aids in diagnosing various conditions related to oxygen deficiency, such as chronic obstructive pulmonary disease (COPD) or acute respiratory distress syndrome (ARDS).

The other units mentioned, such as meters per second, ounces per gallon, and pounds per square inch, do not pertain to oxygen content or blood gas measurements. Meters per second is a unit of speed, ounces per gallon would relate to volumetric ratios not relevant to medical oxygen content, and pounds per square inch is a measure of pressure, not concentration or content of gases in the blood.