I'm really worried about my dad. About 70 days ago, he had corona and needed oxygen therapy at home because his saturation levels were low. For the past 13 days, he hasn't needed oxygen support, and his spo2 levels have mostly been between 94-97. But sometimes when we check, it shows below 90, though it usually goes back to normal above 94 within a few minutes. We're thinking about returning the oxygen cylinder, but I'm concerned. Is there a chance his levels could drop again, and should I be worried about it?

Continue oxygen therapy and saturated is monitored regularly.