Clinical Observation On Interscalene Brachial Plexus Block With Ropivacaine Of Different Concentrations And Volumes

Objective: To compare the block effect and complications with different concentrations and volumes of ropivacaine by interscalene brachial plexus block and discuss witch concentration and volume suitable for ropivacaine to anaesthetize. A total of 55 adult patients undergoing upper limb surgery were allocated to receive 40 ml of 0.375% ropivacaine ,30 ml of 0.375% ropivacaine and 30 ml of 0.5% ropivacaine respectively. The onset time and complete time of sensory blockade of ulner nerve ,medial nerve and radial nerve; duration of analgesia ; surgery time ; satisfaction degree of nerve block and complications were recorded. Results: The onset time of sensory blockade in three groups were 2.2±1.09min;1.93±1.22min;1.38±0.57min respectively . Horner's syndrome in three groups were 4, 1 and 2 respectively. Conclusions : 30 ml of 0.375% ropivacaine may be suitable for interscalene brachial plexus block in adult patients.