Purpose : To determine whether the placement of an interscalene brachial plexus block (IBPB) with general anesthesia before arthroscopic rotator cuff repair surgery would be effective in establishing a clear visual field during surgery and shortening the duration of the procedure.Methods : This study included 152 patients who had undergone arthroscopic rotator cuff repair. Group A received an IBPB before general anesthesia, and group B did not receive the IBPB. The systolic blood pressure (SBP), diastolic blood pressure (DBP), and heart rate (HR) were recorded. The surgical procedure was divided into four stages, and the duration of each stage was recorded. A visual clarity scale (VCS) was determined by arthroscopic visualization and technical ease. VCS and the medication that was administered intra-operatively for hemodynamic stability were recorded.Results : The VCS was significantly improved in group A at stage 2 (acromioplasty) and stage 3 (Greater tuberosity and tendon preparation) of the surgical procedures (P