Max dose of local anesthetic with separate agents. Preop nerve block and surgical block in OR
Where can I learn more on what is the max safe dose to avoid LAST when two separate local anesthetics are used.
Example, 20ml of 0.5% ropivacaine used for an interscalene block in preop. Followed by the surgeon doing their own 2 hours later but uses 20ml of 0.5% bupivacaine.
Its easy to see the safe dose of a single agent but I'm not sure about when more than one agent is involved with a X amount of time inbetween.
Any help in being pointed in the right direction would be appreciated.