My father is 73 years old. He has a history of smoking and he quit the same in 1985. He had breathing problem in 2013 and needed to be hospitalised. Pneumothorax was performed and he was doing well since then. No supplemental O2 was needed. However, in 2015 October he had shortness of breath and was hospitalised. Though he was cured and we bought him back, but after two weeks he had same issues and we needed to hospitalise him. He was cured again. But of late he is having breathing problem. He is on supplemental O2 and his saturation level is around 88% to 93%. I consulted the doctor who is saying that it is a progressive disorder. He has been responding, but does not do any physical activity except breathing exercise. Does this mean end of stage COPD? I love him the most and he is my pillar. I will try anything to increase his quality of life. Can you please give me some guidance?

I refer to this community and was feeling confident but do need guidance.