You have posted under Alzheimer's and Dementia, so you know that you are dealing with some of the most common symptoms of the disease, things about which you can do nothing. Do you have a question for the forum?
Try calling your Area Agency on Aging and asking for a needs assessment. Explain about your upcoming surgery and see what services might be available for your mom.
You can't expect her to remember anything. You can expect her to be angry. Until that phase hopefully passes.
Is she getting any in-home assistance?
Try calling your Area Agency on Aging and asking for a needs assessment. Explain about your upcoming surgery and see what services might be available for your mom.