Ultrasound Blocks for the Anterior Abdominal Wall

52 | Ultrasound Blocks for the Anterior Abdominal Wall
region at least 14–15 times before performing the block using
the muscle planes as an endpoint (Ford 2009). Importantly, the
block should be performed above the ASIS. In conclusion, since a
lower local anesthetic volume is required for IIB at the ASIS
level, selective block of these nerves instead of classical TAPB is
advised (Figure 4.4).
Figure 4.4 – The needle approaching the ilioinguinal nerve under
ultrasound guidance.