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Patients infected with COVID-19 have recovered after treatment, but there is no good solution to the symptoms of Pulmonary Fibrosis, resulting in insufficient oxygen supply.
Due to Pulmonary Fibrosis, the oxygen conversion rate of the air entering the lungs is reduced, so the patient needs to breathe a lot in exchange for enough oxygen. I want to use this N2down O2up to filter the air entering the mask to reduce nitrogen. Obtaining a higher oxygen ratio is equivalent to obtaining higher purity oxygen during breathing to compensate for the insufficient oxygen conversion rate due to insufficient alveoli and inability to absorb enough oxygen.