1. When you compare the rate of breathing with hyperinflated lungs with that in normal breathing, you will notice a significant increase. This will have resulted in an increased expired minute volume. What effect will this have had on blood gases? 2. Patients with an obstructive lung disease often develop hyperinflated lungs, where air becomes "trapped" in the lungs and can't be exhaled. As a consequence, the chest and neck muscles must work harder to assist with breathing.