After being informed about the study and potential risks, written consent was obtained from all patients. Patients who meet eligibility requirements will be randomized in a 1:1 ratio to bi- level erector spinae plane block and modified pectoral block.
In this study, we compared ultrasound-guided modified pectoral nerve (PECS) block and bi level erector spinae plane (ESP) block on postoperative analgesic effect in breast surgery.