Life Expectancy And Oxygen Dependent Copd I Need To Know The Life Expectancy Of A 76 Yrs Old With Severe Emphysema. A True Estimate Would Be Helpful?

I need to know the life expectancy of a 76 yrs old with severe emphysema. A true estimate would be helpful? - life expectancy and oxygen dependent copd

My mother of 76 with newly "diagnosed with end stage" emphysema. She is on oxygen, but now in the same breath. She has smoked 63 years, packs of 4 per day. It is not and has never been so active. It's very breath even with oxygen. Now she is losingher memory and can all sleep in his bed. Examination of the heart and not the results of blood tests at the time. I'm trying to get a life Ballpark for this serious disease.