Dissolved oxygen content is expressed in which unit?

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Multiple Choice

Dissolved oxygen content is expressed in which unit?

Oxygen content in blood is expressed as the amount of oxygen carried per unit volume of blood, so the standard clinical unit is milliliters of O2 per deciliter of blood (mL/dL). This fits the way we quantify how much oxygen is available to tissues, combining the oxygen bound to hemoglobin and the small portion dissolved in plasma. A typical calculation for oxygen content (CaO2) yields a value in mL O2 per dL, usually around 16–22 mL/dL in a healthy person. Other units like μmol/L or mg/dL mix different types of quantities (moles or mass with a gas volume), and mL/L is less common in practice. Using mL/dL keeps the measurement aligned with the volumetric sense of how much oxygen is present per unit of blood.

Oxygen content in blood is expressed as the amount of oxygen carried per unit volume of blood, so the standard clinical unit is milliliters of O2 per deciliter of blood (mL/dL). This fits the way we quantify how much oxygen is available to tissues, combining the oxygen bound to hemoglobin and the small portion dissolved in plasma. A typical calculation for oxygen content (CaO2) yields a value in mL O2 per dL, usually around 16–22 mL/dL in a healthy person. Other units like μmol/L or mg/dL mix different types of quantities (moles or mass with a gas volume), and mL/L is less common in practice. Using mL/dL keeps the measurement aligned with the volumetric sense of how much oxygen is present per unit of blood.

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