Erector Spinae Plane Block For Postoperative Analgesia in Patients Undergoing Total Abdominal Hysterectomy: A Randomized Controlled Study

60 patients Scheduled for elective total abdominal hysterectomy, after obtaining a written informed consent for anesthesia from each patient before enrolment in the study after explaining to them the nature of study.

Inclusion criteria included female patients aged 40 - 70 years, Weighted 50 - 90 Kg and with American society of anesthesiologists physical status (ASA) class Ι to ΙΙΙ Scheduled for elective total abdominal hysterectomy under general anesthesia. Exclusion criteria included Local infection at the site of puncture, Patients having history of hematological disorders, including coagulation abnormality, Patients with severe hepatic impairment, Patients with chronic pain and Patient had a known allergy to study drugs.

Patients were randomized into two equal groups. An online randomization program was used to generate random number list. Patient randomization numbers were concealed in opaque envelops which were opened by the study investigator.

Members of the study group involved in obtaining functional data were blinded to randomization for the period of data acquisition and analysis. Patients were randomly allocated into two groups:

Erector spinae plane block Group (ES): ultrasound guided erector spinae plane block at T9 vertebrae level with 20 ml of bupivacaine 0. 5%. Control Group (c): did not receive block.