I feel for you, Allan, in all of your medical necessities. My younger brother is headed for a cymbal crash of what can be done, balancing heart, kidney function, lung function, blood pressure. Growing up I was the middle child (oldest girl) of seven children in an Irish family. My brother just older (Irish twins) and brother just younger and I shared friends and grew up taking care of each other. My older brother passed away a decade ago and the grieving for me was tremendous albeit loving. My younger brother and his family struggle to face the inevitable and the medical interventions occur almost daily. I've asked him to call me so that I can be with him (to hold a place of peace with him) although he is 400 miles away and we can never know how it will happen. In theory, that place of peace is held everywhere and always, but holding the hand of a loved one and being present at the end can mean so much.
Ram Das has a series of you tube lectures on living and dying and they are all good. He straddles the psychological and transcendental so well. A Buddhist monk, Pema Chodron has a video course on the Shambala site on the Tibetan Book of the Living and Dead called "Sacred Journey" that is fascinating. I've read the book many times over the years, the first in college. Pema Chodron has a very peaceful presence and introduces the very detailed information in a very simple and inspiring way.
Holding that place of peace through the chaos of life is a real challenge. Not getting caught up in the psychological drama but moving beyond to the expansive stillness seems to be key but it ain't easy. We are hard wired, and technology frees us and holds us back at the same time.