More dementia modes

Two nights now, my hd wanted to go out at night. Both nights I managed to talk him out of him and out of pulling his catheter out. The moment he gets into dementia mode, his enemy becomes the catheter. He wants to pull it out, when I told him it cannot be done, he wants to cut it. I have decided if he does go outside like he did the first two times, it is all right, I will let him and follow behind him. He is also not able to go far in his condition. It is better and easier than trying to keep him back. When he is determined, nothing can stop him also. He is very frail but has enough strength to resist me. I got ready to go for my morning exercise - walk and went into the bedroom to check on him. He looks sick, eyes staring and blur, unable to keep his mouth closed and moaning. I decided not to go. That is what I do these days, when he is all right, I go when he is sick, I do not go. He went from 173 to 160, stayed at 160 when he was still able to eat though coughing a lot. Then to 148 on feeding tube, down to 145 and now at 138 pounds. And he is 5 feet 11 inches. The nurse is concerned. We decided to up his feeding and see what happens.