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Progression of the motor block in the operated limb during 48 h of CISB. 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.
