Hi there. I was just curious, you seem to be having trouble with lidocaine infusions, I was just wondering how it affects your rsd. There are two different kinds of lidocaine, each lasts a different duration.

1) Lidocaine ("Plain")
When injected in or under the skin, prevents sensory nerves from firing by depolarizing sensory nerve axons (the electrical wires of the nerves).
Because plain lidocaine is water soluble, it rapidly flushes away with nearby blood capillaries and veins. The half life for 1 milliliter of plain lidocaine injected below the skin (subcuticular) is about an hour.

2) Lidocaine with epinephrine (LidocaineE)
Works the same as plain lidocaine, except the epinephrine causes all the blood vessels in the area to constrict for hours.
Without blood flow to the area, the lidocaine does not get flushed away.
Depending on the location and the amount injected, LidocaineE can have a half-life up to 6 hours.

So if you're treating your rsd with lidocaine it seems to me you would need an excessive amounts of injections to keep it under control and maybe thats why youre having trouble finding a doc who would do them. My doc gives me cortisone injections which isn't similar to lido but provides a couple months of pain relief. But hey if you're doing something new I'd love to hear what it is, I would give anything a try. Good luck and best wishes