The goal of this clinical trial is to is to compare the effectiveness of ultrasound-guided Pecs block with intravenous ketamine versus intravenous ketamine infusion alone in preventing Chronic Post-Surgical Pain (CPSP) in patients undergoing breast cancer surgery. The main question it aims to answer is,
How effective is the ketamine and ketamine with pecs block in reducing the frequency of Chronic Post-Surgical Pain after breast cancer surgery
Adult female patients with breast cancer aged between 18-75 years
ASA (American Society of Anesthesia) physical status I, II, and III
Patients scheduled for elective breast cancer surgery (Mastectomy with or without axillary clearance)
Refusal to participate or withdrawal of informed consent
Surgical procedures involving breast reconstruction with flaps or implants
Patient scheduled for bilateral mastectomy
Reoperation on the same side due to cancer recurrence