Thank you for asking about your liposuction.
If you are healthy, liposuction should be safe for you. The question is whether you will get a good result - skin loosens as we age and may end up loose. So have a consultation and see what your plastic surgeon thinks.
Always see a Board Certified Plastic Surgeon. Best wishes - Elizabeth Morgan MD PHD FACS
In general, as our skin ages, it responds more poorly to liposuction. The best candidate for inner thigh liposuction in their 20-30's when their skin has great elasticity. As a patient's skin ages, I find liposuction results to be poor and guide them against it. Likely at age 80, you are better served with an excisional technique (thigh lift) than lipocontouring. But I would still recommend a formal consult and evaluation by a board certified Plastic Surgeon to answer all your questions. Best of luck.
At age 80, your skin will not snap back and you will have sagging, exchanging one problem for another. There could also be cognitive issues after anesthesia. I'm sorry but this is not a procedure I would consider performing. Best wishes.