Sequential Administration Of Dual Or Single Injection Of Local Anaesthetic For Continuous Infraclavicular Block-Does It Make A Difference?-A Randomized Controlled Trial

Local anaesthetic drugs are classified according to the duration of action as short, intermediate and long-acting drugs. Combining different classes of local anaesthetic drugs for peripheral nerve blocks has faster onset and prolonged duration of action. The purpose of this double blinded randomized controlled study is to compare onset and duration of action between sequential administration of one drug and a mixture of two different drugs , in terms of onset and duration, however, the same pharmacological groups of local anaesthetic drugs, for ultrasound guided infraclavicular approach with to brachial plexus block. An infraclavicular approach to the brachial plexus block can be used for surgical procedures below the mid humerus. It has gained popularity because of its ease of performance and the ability to simultaneously anaesthetize the axillary, musculocutaneous, median, radial and ulnar nerves. The block can be done with minimal risk of pneumothorax and other complications such as block of the phrenic nerve or stellate ganglion. An infraclavicular approach to brachial plexus block provides sufficient anaesthetic and analgesic effect for below-elbow and hand surgeries. Infraclavicular approach is not only advantageous for inserting a perineural catheter, but also has a short procedure time compared to other approaches including supraclavicular and axillary approaches especially using ultrasound guidance

Group A- will receive 10ml 0.5% Ropivacine+10 ml 0.5% Ropivacaine

Group B- will receive 10ml 1% Lignocaine+10 ml 0.5% Ropivacaine

Post procedure the onset of block is assessed by recording the sensory and motor blockade by time to complete loss of sensation and complete loss of motor power, need for intraoperative surgical anaesthesia and analgesia, is recorded and duration of block is assessed by time to rescue analgesia.