Calculating Oxygen Exchange Rate: A Step-by-Step Guide

Step 1: Calculate the total volume of air exchanged per minute.

16 breaths/min * 1.5 L/breath = 24 L/min

Step 2: Calculate the total amount of oxygen inspired per minute.

24 L/min * 0.20 = 4.8 L O2/min

Step 3: Calculate the total amount of oxygen expired per minute.

24 L/min * 0.16 = 3.84 L O2/min

Step 4: Calculate the respiratory quotient.

Respiratory quotient = Volume of CO2 expired / Volume of O2 consumed

Respiratory quotient = 3.84 L CO2/min / 4.8 L O2/min

Respiratory quotient = 0.8

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