I am asking this question of behalf of my grandmother.2 days back her oxygen saturation is hovering around 76 to 85.We immediately took her to the hospital where o2 level was 86 at night.She is asthmatic from past 35 years.She is having high bp ,sugar and thyroid for which take regular medicines.Bp recorded at hospital initially  was 216/84 then had come down to 168/82.Ecg and echos was normal .Troponin was also normal. Chest x ray was not good so doctor suggested hs ct scan for which i am attaching her report.Her tlc count at the time of admission was 15700 as of today tlc count was 14500.Bp and sugar are now controlled as of today.But she is feeling better talking to us but doctor said next 48 hours are critical and crucial.Please suggest something.