After a 2-week screening/baseline evaluation, participants will be randomized in a 1:1 allocation ratio to one of the following 2 sequences: 1) portable oxygen concentrator (POC) for a first 2-week period followed by standard of care (SOC) for a second 2-week period or 2) SOC for a first 2-week period followed by POC for a second 2-week period. There will be a washout period of one week between the two treatment periods. A total of 10 subjects will be enrolled per sequence.
A prospective, open label, randomized, crossover, pilot, exploratory study to describe the effect of the Inogen One® G4 POC on brain hypoxia, peripheral oxygen saturation and cognitive function in adults with longterm- COVID.