Mitch, I am sorry for what you are going through. I am 73 and still in good health. But, I saw my mother go through this process a few years ago. She was 87 when she passed. She had emphysema, they called it something else, but after doing research I saw it was what I thought. She smoked until she was 55, then quit cold turkey. I believe quitting gave he some good time she would not have had.
Her death took over 10 years and it was slow in the since that for most of the time she was not sickly or unable to live her normal life, she just had a nagging cough. I think she was in the hospital a couple of times for a chest cold or flu, but she always bounced back and was out in no time. Over last three years she lost weight and had to go on oxygen full time. She was never in pain until the very end and even then, her doctor helped her manage it, so she was pretty comfortable most all of the time. She refused to go into the hospital and wanted to stay in her apartment. The last year we had someone there with her 24/7 to help her get around and see she was comfortable. I was with her the day before she passed. We set and talked for a few hours as I recall it was a nice visit. She could not walk much so I carried her to bed before I left. Her night lady was already there with us.
I was close to mom as my dad had past 11 years or so before mom. So, she moved closer to us so that as she aged, I could be close.
Mom passed in her sleep that night, the night lady checked on her at 3am and she was not breathing, and she could not detect a heartbeat. Mom had a do not resuscitate, order so the lady just called me. I drove over and spent some quite time with her. She was a very religious person and did not fear death. She lived a beautiful life and was always a beautiful woman and mother. I was blessed to have her as my mother...