– Insert the needle from the posterior end of the probe
– Empty the hose and the needle of air by injecting 1/2 mL of local anaesthetic subcutaneously before advancing the needle
– Advance the needle with in-plane technique until the needle tip touches the lateral side of the BP between C5 and C6
– The endpoint of injection is complete spread of local anaesthetic along the lateral side of the C5 and C6 spinal nerve branches
– Reposition the needle tip as necessary to reach the endpoint
The in-plane approach to the interscalene brachial plexus block The in-plane approach is recommended as the first choice, as it allows real-time control of the position of the needle tip at all times
