“…The main complications associated with interscalene brachial plexus block are phrenic nerve block which can lead to respiratory function decline, particularly in patients with pulmonary conditions; Horner syndrome characterized by ptosis, myosis, and anhydrosis; and recurrent laryngeal nerve block resulting in dysphonia. The main complications inherent to supraclavicular brachial plexus block are also phrenic nerve block, Horner's syndrome (although less frequently than in interscalene block), and pneumothorax [ 8 , 9 , 11 ]. The authors chose to perform a clavipectoral fascial plane block, combined with a superficial cervical plexus block, to prevent the aforementioned complications.…”