My Dad has just had a knee replacement operation. Unfortunately hes now suffering from post op confusion. He's trying to walk and is very confused though coherent. It happened the last time he had a major op around 10 years ago and it's like deja vu. He suffered for nearly a month last time so hopefully he'll recover quicker. I was wondering if anyone could offer any advice. He's obviously in a great amount of pain but it's very concerning as Hostpital short staffed and trying to walk so soon unaided can't be good. Just worried when we're not there! Any advice would be appreciated.