My sister had lung cancer and had 2/3 of her right lung removed 12 years ago. She never quit smoking, and now has COPD and Emphysema, and has been hospitalized after she was found unconscious. I was told she has too much CO2 in her blood. She is on a ventilator for 5 days, and has 20% heart (or lung?) capacity. I live very far away, is she going to be OK, or should I go see her while I can?