LAUSR

© 2019 Indian Journal of Anaesthesia | Published by Wolters Kluwer Medknow The ubiquitous availability of high-resolution, portable ultrasound transitioned a paradigm shift in nerve blocks, from deposition of local anaesthetic in the vicinity of a nerve/plexus after visualisation, to deposition of drug into interfascial planes, not because nerves can be visualised in these planes but with the correct anatomical knowledge that nerves do course within them.[1] The advent of ultrasound guidance facilitated the performance of the transversus abdominis plane (TAP) and rectus sheath blocks, rendering these safer and more predictable. With time, modifications of the TAP block emerged.[2] However, blocks of the abdominal wall were limited to providing sensory analgesia alone.