To answer your question, Choose, the only way to handle these situations is in accepting God's Sovereign Will in deciding when it's time a believer goes home to be with Him. We had the assurance that my beloved Howard was a believer and during the months of his illness, I watched the spiritual growth he manifested. That was and continues to be a tremendous comfort. Regarding the hospital care, it's been my experience that a lot of the more routine care, such as bathing, care of dry mouth, etc, is performed by family members, not hospital staff. My husband was due to go into a hospice care center, but passed away the day before he was to be moved from the hospital to the hospice home. I will continue my prayers for your loved one and for you. Giving him the assurance that as a believer he has absolutely nothing to fear regarding death, that it is merely a passage into eternal life, may bring enormous comfort to him, even if you feel he is not consciously aware of his surroundings. It sounds as if he has already experienced a tiny part of the glorious afterlife in what you described. My husband raised both arms and pointed to the ceiling at one point. There was a serene and sure expression on his face that is unforgettable. I believe it's one way that God sends both the dying person and his loved ones comfort and a sense of His Presence in the situation.
God Bless you.