Hello Sir. My grandmother (aged 75) is admitted in the hospital because of a chest infection. Her carbon dioxide levels have been increasing continuously. Right now, it is 170 mEq/L. We are really worried, the doctors have suggested us to not go for an incubator as that will simply mean postponing what her death, as she cannot be cured now. I wanted to know the threshold limit of this carbon dioxide level, i.e., at what level this becomes extremely dangerous and leads to death? Thanks for your help.