I'm soo sorry to hear the ketamine didn't last. It is so upsetting to get hopes up and things not work the way we were hoping. i am new to rsd. i had an elbow injury and had 2 surgies including a nerve surg. So i had it for a year before diagnosed. Of course blocks didnt work. I feel like you. i was very active. I asked is this it? But as i research-although this is a rare disorder- there are Drs. researching and trialing everyday. (Even in other countries.) This gives me hope that in time something will be discovered. I also read how Dr. S has been researching RSD for many years and still hasnt given up. That gives me hope that this may not be forever. I am also so glad i found forums like this that i can relate and learn from others and not feel so all alone. please dont give up. momof4