Ultrasound Guided Interscalene, Suprascapular and Anterior Glenoid Nerve Blocks on Diaphragmatic Excursion and Analgesia Following Arthroscopic Shoulder Surgery

Patients will receive general anesthesia, plus an ultrasound-guided interscalene brachial plexus block (ISB) with the injection of 15 mL of 0.25% bupivacaine.

Patients will receive general anesthesia plus an ultrasound-guided suprascapular nerve block (SSNB) with injection of 15 ml of 0.25% bupivacaine.

Patients will receive general anesthesia plus an ultrasound-guided anterior glenoid block with injection of 15 ml of 0.25% bupivacaine.

Patients will receive general anesthesia, along with a total volume of 30 mL of 0.25% bupivacaine, divided into 15 mL for ultrasound-guided SSNB and 15 mL for ultrasound-guided anterior glenoid block.