Opioid-free Anaesthesia in Breast Cancer Surgery

Patients are allocated to receive non-opioid anaesthesia intraoperatively. Patients will receive a mixture of dexmedetomidine, ketamine and lidocaine for intraoperative analgesia.

Patients are allocated to receive conventional general anaesthesia intraoperatively with the use of fentanyl and morphine for intraoperative analgesia.