Do you think my Mom's leg will be amputated or what?

I know that right now you are very scared and even if it comes down to your Mom having to have her leg amputated she will recover. At 54 she is still young enough to go to rehab get stronger perhaps get fitted for a prosthetic leg. Even if she doesn't she will adapt and you can be strong and help her. The only thing that matters right now is that the Doctors do what is needed to save her life. I truly hope that the operation is successful and that the stent works restores blood flow and that she heals. Just try your best to be strong be there for your Mom and what ever happens she will be alive.