I urge you to think carefully before making a decision. I also believe that as long as your mother still in the hospital, I will be safe. More importantly, the use of oxygen is not critical crisis. It is to be able to keep oxygen levels to fit the needs of the body. Show that the parent will be able to breathe on their own. I just need the oxygen content increased from normal people because she is sick. I want you to think and ponder before deciding. I think your mother is important for you. But your work is very important as well. We do so much to make you come back to the USA. Please understand that I'm saying it not means I do not worry about your mother. But I speak the truth as it is now.