Bullet point summary:
1) The effectiveness and safety of local anesthetics used in continuous SAPB during VATS are still less understood.
2) When continuous SAPB was used for VATS, the analgesic effect of 0.2% ropivacaine was not inferior to that of 0.375% ropivacaine.
3) The plasma concentrations of ropivacaine at both 0.2% and 0.375% were in the safe range in continuous SAPB undergoing VATS.
4) Continuous SAPB with 0.2% ropivacaine has a lower blood concentration within 48 hours.