My mom was hospitalized for kidney problems due to diabetes. She's fine other than shortness of breath due to her lungs having water and her foot developed a nasty wound which started as a blister. She was getting better after her 4th dialysis and a doctor said that the infection on her foot was stopped. Though, they need to clean it in an operation soon. A day after her 5th dialysis, the doctor went ahead to implant on her arm something they said about to be used for dialysis once she gets out (sorry, I only know what is it for) and they also clean the wound which included a minor surgery (her doctor ok'd on it as long as the anesthesia isn't the one that will put her to sleep).
As expected, she was in pain the rest of the day after the two "surgeries" (which they performed both in the same day). After that day, she stopped eating meals. She can only swallow 2 or 3 teaspoons and stopped and acted like she's going to throw up. She said she's not hungry and she had grown weak in just 3 days. She hardly talk and can't remember what's happening during the day. Her responses to simple questions were like 30 seconds late, and in just yes or no answers. Mostly she'll just nod. Sometimes I have to repeat the question. She still can remember people, but can't remember their full names anymore. Her eye sight has gone worst, and have problems hearing (she never have a hearing problem before). A neurologist had her lungs and heart tested, but never explained anything wrong with them. He said they'll have her under observation. It's like he doesn't know what causes my mom's sudden response deterioration. He did say the possibilities that my mom could have a stroke, an infection caused by the wound on her foot, the dialysis wasn't cleaning all the toxic in her body.
My question is, what do you think caused this? Is this permanent?