Open Radical Prostatectomy and Erector Spinae Plane Block

"With the patient in the sitting position, 20 ml normal saline will be administered between the T11 spinous process and the erector spinae muscles with the guidance of an ultrasound probe placed on a parasagittal plane.~Intraoperative analgesia: after anesthesia induction, paracetamol 1 gr intravenous (IV)+ tenoxicam 20 mg IV + morphine 0.05 mg/kg IV (max 4 mg).~Postoperative analgesia: IV morphine patient-controlled analgesia (PCA) of 0.5 mg/ml morphine (demand dose 1 mg; lockout interval 8 m; 6 mg/h limit)."

"With the patient in the sitting position, 10 ml 1% lidocaine + 10 ml 0.5% bupivacaine will be administered between the T11 spinous process and the erector spinae muscles with the guidance of an ultrasound probe placed on a parasagittal plane.~Intraoperative analgesia: After anesthesia induction, paracetamol 1 gr IV + tenoxicam 20 mg IV + morphine 0.05 mg/kg IV (max 4 mg).~Postoperative analgesia: IV PCA of 0.5 mg/ml morphine (demand dose 1 mg; lockout interval 8 m; 6 mg/h limit)."

Numeric Rating Scale (NRS) pain score will be recorded from 15th minute in recovery room followed by 1.-3.-6.-12.-18.-24.hours with two different conditions which are at rest and while couching.If NRS score becomes ≥4 Dexketoprofen 50 mg will be administered (max 4 times).