Analgesic effect of adding modified pectoral nerve block to serratus anterior plane block in modified radical mastectomy: Randomized double-blinded trial

Analgesic efficacy of intravenous morphine, tramadol and ketorolac on postoperative pain in patients undergoing modified radical mastectomy

Role of ketamine and tramadol as adjuncts to bupivacaine 0.5% in paravertebral block for breast surgery: A randomized double-blind study

Comparative study of analgesic effect of epidural ketamine vs. epidural tramadol in patients undergoing mastectomy under thoracic epidural anesthesia

Effect of chronic preoperative tramadol abuse on paravertebral block following thoracotomy

Comparative Study Between Systemically and Perineurally Administered Tramadol as an Adjunct in Ultrasound Guided Supraclavicular Brachial Plexus Block

Effect of tramadol as a local anesthetic adjuvant in epidural labor analgesia: Randomized controlled study

Role of Ketamine as an Adjuvant to Bupivacaine in C-Arm Guided Thoracic Paravertebral Block Analgesia for Modified Radical Mastectomy

Efficacy of dexmedetomidine as an adjuvant to bupivacaine in the ultrasound-guided serratus anterior plane block for postmastectomy analgesia

Ultrasound-guided thoracic paravertebral block vs pectoral nerve block for postoperative analgesia after modified radical mastectomy