Introduction: Regional anesthesia has experienced major changes in recent years. particularly due to the use of electrostimulation and ecogram. The unilateral paralysis of the diaphragm is a secondary complication after blocking the supraclavicular brachial plexus. with an incidence of 50 to 67 %. https://countryscenesaddleryandpetsuppliers.shop/product-category/cushioned-lunge-rein/