Could COVID19 disease be a DIFFUSION hypoxemia triggering maladaptive pulmonary vasoconstrictive responses?

Do any nurses, doctors, paramedics, etc. have any input on what this guy is saying here?

I saw his other video suggesting the disease resembled an altitude related illness… sounds like he’s in NYC on the front lines.

Rather than primarily V/Q mismatch or shunt physiology, could COVID19 disease be a DIFFUSION hypoxemia triggering maladaptive pulmonary vasoconstrictive responses?

 

h/t BFD