Update
She improved a little overnight. Apparently, she needed two respirators and they were able to take her off of one, and so far she's able to breathe with the one. She began showing signs of kidney failure, so she is also needing minimal dialysis, but the doctors are still optimistic and my brother, after getting no sleep for days, is resting at home.
Keep it up, folks! It's working!
Thank you so very, very much!

WW