Background
ESPB
Thoracotomy is one of the most painful surgical procedures [The hypothesis of this study is that the application of ESPB with 30 ml of local anesthetic after thoracotomy/lobectomy would provide more effective analgesia. The aim of this study is to compare the analgesic efficacy of 0.25% bupivacaine in different volumes for ESPB in patients undergoing thoracotomy.