What does severe sepsis change about the thin wall between the alveoli and the alveolar​ capillaries?

Sepsis will cause increased permeability of the capillary, causing edema which was the water to go in the interstitial layer. Make the thin wall become fatter. This will cause the distance between capillary and the alveolus become further, thus making the gas diffusion is harder and less oxygen gained. That is why sepsis patient might get some difficulty in breathing.