My mom is aware of her dementia, but not the degree of it. Today I told her about an appointment with the neurologist next week, we're lucky to get in so quickly. I told her it was to check in about her meds for Parkinson's and to see what he thinks about her getting a knee replacement, how this potentially can affect her brain. A few hours later she starts asking me about it, but is all confused as to what it is about, so I tell her again. I want to tell her her dementia is getting worse but not sure that is wise. She is 90 and very healthy other than the PD which is controlled by her medication. It is the only medication she takes besides OTC pain relievers and allergy relief. I know she can physically handle the knee replacement but unsure about her mind. She had the right knee replaced 3 years ago and did really well with that. This was before the PD diagnosis. Her left knee is getting really bad - could've been done the same time as the right, but she didn't want to at the time. It is the main source of pain and discomfort for her and is diminishing her quality of life quite a bit. She tries to joke about it saying it only hurts when she walks. She gets sad about her knee and that she can't really do anything anymore.