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Multiple Choice

DO2 calculation: Cardiac output = 5 L/min, CaO2 = 19.7 mL/dL. What is DO2 (mL/min)?

Oxygen delivery (DO2) is the amount of oxygen carried to the tissues each minute, calculated as the product of how much blood the heart pumps (cardiac output) and how much oxygen each deciliter of arterial blood can carry (CaO2). Use consistent units: convert CO to deciliters per minute since CaO2 is per deciliter. 5 L/min equals 50 dL/min. Multiply by CaO2: 50 dL/min × 19.7 mL O2/dL = 985 mL O2/min. So DO2 is about 985 mL/min, which matches the given result.

Oxygen delivery (DO2) is the amount of oxygen carried to the tissues each minute, calculated as the product of how much blood the heart pumps (cardiac output) and how much oxygen each deciliter of arterial blood can carry (CaO2). Use consistent units: convert CO to deciliters per minute since CaO2 is per deciliter. 5 L/min equals 50 dL/min. Multiply by CaO2: 50 dL/min × 19.7 mL O2/dL = 985 mL O2/min. So DO2 is about 985 mL/min, which matches the given result.