Pilot Open Label Use of the Hi-OXSR for the Treatment of Post COVID-19 Cognitive Dysfunction

Inclusion Criteria: 1. Ability to provide written informed consent. 2. Previously diagnosed with cognitive dysfunction following recovery from COVID. 3. Not pregnant at time of study. 4. Oxygen saturation on room air ≥92% at screening. 5. Willing and able to comply with the treatment schedule and procedures. Exclusion Criteria: 1. History of cognitive dysfunction prior to COVID infection 2. Hospitalization for the treatment of COVID 3. Participating in another investigational trial or the use of an investigational drug within 30 days of screening 4. For individuals of childbearing potential: positive pregnancy test at screening or lactating or unwilling to practice a medically acceptable form of contraception from screening to Day 14 (acceptable forms of contraception: abstinence, hormonal birth control, intrauterine device, or barrier method plus a spermicidal agent) 5. History of pulmonary hypertension 6. History of narcolepsy 7. Moderate to severe COPD 8. Interstitial Pulmonary Fibrosis 9. End-tidal PCO2 \>55 mmHg during training treatment 10. Presence of a condition or abnormality that in the opinion of the Investigator would compromise the safety of the subject or the quality of the data