Hi Emily
Wow what a brilliant and useful reply! Ask, ask, and ask some more. Any surgeon worth considering will be happy to provide answers to all the questions Jean has listed. If you don't get a satisfactory response then is the time to move on and find an alternative.
Although you and your family are going through a difficult time it is important that you try to remain positive, easy for me to say I know. Advancement in knowledge of the knee mechanism means that total knee arthroplasty (knee replacement) produces highly successful outcomes and is improving all the time. At least now a diagnosis has been made and the referral to an orthopaedic surgeon imminent you are making excellent headway.
Very best wishes to you and your mum for a positive and informative outcome next week.
Lyn x