Question

Ventilation during intensive care can be modeled as a mixing problem. A patient is placed on a ventilator to remove CO₂. Suppose that the rate of ventilation is 100 mL/s, with the percentage of CO₂ (by volume) in the inflow being 0. Suppose also that air is absorbed by the lungs at a rate of 10 mL/s and gas consisting of 100% CO₂ is excreted back into the lungs at the same rate. The volume of a typical pair of lungs is around 4000 mL. If the patient starts ventilation with 20% of their lung volume being CO₂, what volume of CO₂ will remain in their lungs after 175 minutes? (Round your answer to the nearest whole number.)

______ mL

No additional information is given. This is the entirety of the question.

Answer 1