In brief, the superficial block was performed using a 22G needle (07 x 40 mm). The mixture injected was 15 ml of 0.5% bupivacaine + 10 ml of 1% lidocaine. Deep cervical plexus block was performed using a Stimuplex DR stimulating needle and the dose of anaesthetic used was 10 ml 0.5% bupivacaine + 5 ml 1% lidocaine applied in the vicinity of the C3 nerve root.

The MCPB performed using ultrasound-guidance aiming specifically for the interfascia space. Eighteen ml of 0.375% bupivacaine was injected into the interfascia space at the level of C3 vertebral body using a 22G needle (07 x 40 mm).

The number of times a surgeon would have to supplement the Regional Block with intrafield application of increments of short-acting local anaesthetic