Theres the Cushing reflex which makes you breathe shallower but Im not 100% sure the nausea/vomiting and breathing troubles are relatedGood lord this is a hospital visit.As a physician these symptoms would spark a large battery of tests in my primary care office, but it sounds late for that. He needs to try a hospital. Make sure he tells them exactly what you wrote here.
When you look at intracranial pressure, how does that affect how someone breathes?I know it makes you work harder to breathe but not why.