Exploring Long-term Pain Relief with 5% Dextrose Added to Local Anesthetic

"The principal investigator will use a palpation-guided approach to select the injection sites. Injection solutions will be prepared by the assisting nurse. For each patient, 1 mL of a 50% dextrose solution (Pfizer Canada ULS, Kirkland, Québec) will be added to the usual local anesthetic solution of choice.~Solutions contain either 0.3% Ropivacaine, 1% Procaine, 0.5% Lidocaine, 0.25% Bupivacaine, or a mixture of 0.25% Bupivacaine and 2% Lidocaine in a 9:1 ratio."