Hello and Welcome.
Excuse my response to your question. It's been near 48 hours since you posted - how are you feeling today?
I have not had an RFA - but many of my friends and many of the members of MH that post questions and information have also had an RFA. My closest friend and one of my well respected members Philnoir have had repeated RFAs over the course of many years. I don't recall any of them reported the effects you are experiencing.
Again how are you today? Are you still monitoring this site? If so I'll contact my RFA friends and do some research for you.
I'll look forward to hearing from you again.
I'm going to assume that you had a procedure called a medial branch neurotomy, which destroys nerve tissue providing sensation to the spine's facet joints. We call this RFA because this is the machine used for the procedure -- a pulsed Radio Frequency Ablator. An ablation essentially melts the nerve tissue.
The needle, catheter, and probe used during this RFA procedure does not enter the spinal canal and cannot cause those symptoms. In the lumbar area, the anatomy is such that major blood vessels are not disturbed.
I am suspecting the local anesthetic absorbed by capillary action, or IV anesthesia used during your procedure may have caused these side effects -- perhaps the benzodiazepene medication midazolam (Versed) given as part of the "conscious sedation" used for this procedure. Other injectables may have included fentanyl (an opioid with a half life of 20 minutes), and perhaps propofol (again, short acting sedative medication), however, propofol is being used less and less in this type of procedure.
The local anesthetic used at the injection site is usually a combination of bupivacaine (Marcaine) and a small fraction of epinephrine to constrict blood vessels to minimize bleeding or absorption of anesthetic.
Any side effects of anesthesia should be short-lasting, as these medications remain in the body a day at most.
Again, you have experienced a highly unusual reaction to this procedure and if you are still experiencing any of these side effects, please seek medical attention immediately.