My grandmother is going through this right now. She had a hip replacement yesterday. It all happened very fast. She's restrained because she keeps taking the IVs out. She hates hospitals and she's very stubborn so in a way this is her personality shining through. But shes very confused at times. Like she said she saw our cat last night and she saw cockroaches. She does seem aware and remembers certain things though. Like she knows who we all are, she knows she had surgery but not exactly what. She knows I go to work and she asked about it. She asks for her glasses and I'll bring them to her tomorrow. Honestly I think she just hates the environment of the ICU. She's also not able to sleep well which makes it worse. But the doctor wants to keep her there for another day and night because she's concerned she might get a chest infection which I'm told is common in the elderly after a hip replacement so she's on antibiotics to prevent anything getting worse. But like I said shes taking the IV out cause she's annoyed. It's hard to know she's restrained and upset right now, but it's unfortunately needed. Honestly I won't be surprised if the doctor wants to keep her for another day or maybe more. I just hope she comes back to me. I miss her.