I'm so sorry for your situation. I asked my pain mgt. Dr. today about the Ketamine injections and your Dr. Schwartzman is the only one
SHE is aware of. I tried to ask for you but sorry, no help so I hope his replacement will indeed pick up where Schwartzman left off for your sake.
Thinking about you, I know your pain, please keep your spirits up and keep the hope!