This thread sounds a lot like the discussion I had with my mother yesterday while we were over there for his 92nd b'day.

As selfish as it may sound, you have to take care of yourself first! If you are not in shape, how can you take care of those around you? If you need some time for yourself and your companion needs care at the same time, DO NOT PUT YOUR NEEDS ON HOLD. It is now possible to get Social Services to get you some relief, even if it's just for an hour or two at a time. Speak to the social worker assigned to Mudge's case. That what the whole damned department is there for.[Rant over.]

As far as his loss of consciousness, get them to push up the date of his battery change. I will give you odds his pulse or blood pressure was below par. Falling out in a bad place can have serious results.

As has been said in several ways here, you have to look at the whole picture and you are part of that picture.