Randomization and blindness
ESPB
Sixty cases were randomly divided into two groups by a computer-generated sequence into sealed opaque envelopes. Group (ESPB) Preanesthetic assessment included history taking, general examination, and laboratory investigations.All cases were premedicated by midazolam 2 mg intravenous (IV) after cannula insertion. In addition, cases underwent US-guided ESPB before general anesthesia induction (GA).