Methods
allergic, skin infection
COAGULOPATHY, SKIN INFECTION
This randomized controlled double-blind was conducted following the tenets of the Declaration of Helsinki. The study design was approved by the ethical review board of Kafrelsheikh University, Egypt (MKSU 40–11-21), and written informed consent was reported from all cases. The study was conducted after registration on ClinicalTrials.gov (NCT05165836; principal investigator: Mohammad Fouad Algyar; date of registration: December 21, 2021, with no plan to share individual participant data). Our research enrolled 60 cases 18 to 65 years old, of both sexes, with body mass index < 40 kg/mExclusion criteria were allergic history to drugs used in the trial, shoulder diagnostic arthroscopic operations, chronic opioid usage, skin infection of the block area, and coagulopathy.