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Analgesic Effectiveness
Values are the number of patients (%). Group R8: continuous interscalene brachial plexus block with 0.2% ropivacaine at a rate of 8 ml/h, Group R6: continuous interscalene brachial plexus block with 0.2% ropivacaine at a rate of 6 ml/h. POD: postoperative day.
