Effect of Bilateral Erector Spinae Plan Block in Colorectal Surgery

"Bilateral-injection ultrasound-guided bilateral erector spinae plane block~Pre-operatively, with the patient in the sitting position, 20ml 0.25% bupivacaine will be administered between the T9 spinous process and the erector spinae muscles with the guidance of an ultrasound probe placed on a parasagittal plane. The same procedure was applied bilaterally.~Intraoperative analgesia: After anesthesia induction tenoxicam 20 mg IV and 30 min. before the end of the surgery paracetamol (1gr) iv was applied.~Postoperative analgesia: IV-PCA: The requested dose will be 20µg/kg morphine, the lock-in time will be 6-10 minutes, the 4-hour limit will be 80% of the total calculated dose.~Rescue analgesia was provided with iv tramadol 30 mg boluses whenever the Visual analog scale pain score \>3, (max doses 300 mg/day)."

"Intraoperative analgesia: After anesthesia induction tenoxicam 20 mg IV and 30 min. before the end of the surgery paracetamol (1gr) iv was applied.~Postoperative analgesia: IV-PCA: The requested dose will be 20µg/kg morphine, the lock-in time will be 6-10 minutes, the 4-hour limit will be 80% of the total calculated dose.~Rescue analgesia was provided with iv tramadol 30 mg boluses whenever the Visual analog scale pain score \>3, (max doses 300 mg/day)."