Debbie,
I am sorry that your hip replacement made your RSD flare and spread to all your limbs.
Before you consider another surgery, it would be good to try to find out why your hip is hurting so much. Is a nerve being pinched ? Are your nerves in a flare from something irritating them ?
(first see what you can find out what is going on)

If you do need to have a new surgery, it is a good idea to get an anesthologist that understands RSD. Or try to find one at a pain clinic that you can speak to as to what is the best way to keep your nervous system calm during the surgery and after.
Severe pain can make us do things that we normally would not do.
Try to think this out logically as to what is going on with your body causing this pain.
Is it a new flare ? Has it been a problem ever since the surgery ?
Have you had an MRI or something to see what is going on ?

REiki is a wonderful way of getting our nerves settled down. maybe your nerves are in a flare and need to settle down ??
Let surgery be the last thing you need to do if absolutely necessary.
A good anesthesologist can give you the information you would need to have your surgeon oversee for the person handling your case if you do need surgery.
You are obviously in a whole lot of pain. I hope you can find out what is going on to cause this pain. Ketamine is an old form of anesthesia. So if there is something going on asnethesia is not going to solve it.
If there is no physical reason, then your nervous system is in a flare, and hyperbaric oxygen deep dives will resolve the issue getting oxygen into your cells. Or a Soma body worker can help you get things calmed down also.. I hope some of this information can help you.