IV patient-controlled analgesia (PCA) tramadol+Serratus Anterior Plane Block(SAPB) Tramadol infusion (PCA): 400 mg tramadol, IV 4 mg/mL tramadol solution into 100 mL normal saline; PCA settings: 0.3 mg/kg bolus, 10 mg Demand dose and 20 min lock out interval, six-hour limit infusion to attain 100 mg. Maximum daily dose was set at 400 mg.

20 mL of bupivacaine at a concentration of 0.25% to between serratus anterior and intercostal muscle using the in-line technique for SAPB.

IV patient-controlled analgesia (PCA) tramadol Tramadol infusion (PCA): 400 mg tramadol, IV 4 mg/mL tramadol solution into 100 mL normal saline; PCA settings: 0.3 mg/kg bolus, 10 mg Demand dose and 20 min lock out interval, six-hour limit infusion to attain 100 mg. Maximum daily dose was set at 400 mg.

Visual Analogue Scale was used for pain

tramadol consumption

Ramsay sedation scale (RSS)

side effect profile

additional analgesic use