Single- shot ultrasound guided ESP block with 30 ml 0.25% bupivacain at the T10 vertebral level was performed preoperatively to patients in the ESP group (Group I).

consists of the patient group without any procedure

ESP Block was performed preoperative to all patients in ESP block group. Patients in all groups were provided with intravenous patient- controlled analgesia device containing morphine for postoperative analgesia.

In the recovery room, all patients were given a patient- controlled analgesia device containing morphine 0.5 mg/ml, set to deliver a 1mg bolus dose of morphine with an 10 min lockout time and 10 mg 4 h limit.Total morphine consumption during the 24 hours postoperative period will recorded at 5 times intervals ( 2, 4, 6, 12, 24 hours).

A Research assistant, blinded to the group allocation, interviewed patients and collected data at 5 times intervals ( 2, 4, 6, 12, 24, hours) in the 24 hours postoperatively. Patients were asked to rate their pain using verbal analog scale, where 0= no pain and 10= worst pain possible.

Age, BMI, ASA, Duration of surgery was recorded.

incidences of nausea and vomiting during the 24 hours postoperative period was recorded recorded at 5 times intervals ( 2, 4, 6, 12, 24 hours).