90+ year old with new onset of inguinal/femoral hernia - how to decide whether to proceed with surgery?

90+ year old female with high quality of life (still walks and does daily activities) with a new hernia. Day discovered was about the size of a golf ball. Went to ED where they performed CT w/contrast and said it was a small 'inguinal' hernia containing fat and referred to surgeon.

Met with surgeon who said s/he wasn't sure if it was an inguinal or femoral hernia due to artifact from previous hip arthroplasty. We asked whether ultrasound would be appropriate to help clarify since it was explained that femoral hernias are particularly dangerous.

Surgeon didn't really want to proceed with US and just wanted us to consider surgery or not (robotic w/mesh). Said main risk would be anesthesia and not surgery itself.

We are at a highly respected academic medical center, just trying to decide what to do. I feel that whether it is a true inguinal or femoral hernia would be a major deciding factor whether to proceed. Should we ask the surgeon if they would be willing to consider other/advanced imaging or a re-read of the first CT?