I am sitting next to my father right now, and have been for the better part of 24 hours. He is at the very end of his battle with brain cancer (GBM IV), which began in early August of 2012.
He became mostly paralyzed by late-November, but then stabilized for 6 weeks while we took care of him 24/7. His speech was very slurred and he was often confused and irritable, but overall he could listen and hold a conversation.
Suddenly, around Jan 17th, he couldn't stand up at all (he had been using a walker), and within 3 days he fell into a deep sleep/unconsciousness.
This morning around 3am the "death rattle" started. He was breathing heavily and you could hear the fluid in his throat. My sister, mom and I crowded around him - crying and preparing for him to take his last breathe. By 4am foam was coming out of his mouth, and a little while later the foam had blood in it. It's the most terrible thing I have ever seen in my life - especially since my father is young and still in great shape despite the five months with cancer.
We have him his pain meds, Lorazepam to stop the jerking from small seizures, and then Atropine to reduce the secretions. Within an hour of taking the Atropine his mouth dried up, the foam was gone and he was breathing fairly normally. He's been stable now for 8 hours, but I know he will soon regress again and die. The Hospice nurses were saying he may die any minute this morning, but now they think he may live till tomorrow.
The ups and downs are painful to watch. Has anyone had experience with this? What happened? Do they die peacefully or do they struggle and choke for air before dying?