From recollection there is some limited information about pre-surgery analgesia and anaesthesia to be found on the RSDSA website. You would need to do a bit of searching but it will either be under their publications or listed in the comprehensive index of selected research articles.

The reality is that there has been virtually no research or work done on protocols to prevent either new CRPS symptoms or a spread or worsening of CRPS symptoms in patients who already have the condition but who subsequently require surgery. This is why it is virtually impossible to find any information let alone protocols or reliable advice that you can take to a surgeon. Such protocols don't exist. The general advice that in CRPS patients, invasive procedures should only be done when required as an emergency isn't entirely useful and ignores the realities of life.