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Ultrasound guidance during peripheral nerve block is a revolutionary approach in clinical practice. For a successful block, local anesthetics (LA) should surround the nerve circumferentially. Different definitions have been used to describe the ultrasound image for a successful block. For example, in the infraclavicular area, “U”-shaped LA distribution is suggested, whereas “doughnut sign” is recommended for small peripheral nerves of the body.[1,2]

Can We Use ''Coin Sign'' Wiew To Predict Block Success After Sciatic Nerve Block Performance