Impact of Erector Spinae Plane Block on Chronic Postsurgical Pain in Breast Cancer Patients

Prior to general anesthesia, ultrasound guided erector spinae plane block (ESPB; performed with 0.5% ropivacaine 35 ml with dexmedetomidine 1 microgram/kg) is performed at T2 level (15 ml) and T4 level (20 ml).

General anesthesia alone.