There are now a dizzying array of ultrasound guided abdominal wall blocks, e.g. Erector Spinae, Quadratus Lumborum, Rectus Sheath, Ilioinguinal, Iliohypogastric and more, some overlapping terminologically and their overall place in multimodal analgesia to be fully elucidated.
This study finds benefit post-Cesarean in the I-TAP (ilioinguinal transversus abdominis plane block) group after spinal anesthesia despite intrathecal morphine and non-opioid oral analgesia. Use of PCA Fentanyl was less (a study intervention only, and not their usual practice). They plan further study to determine how clinically significant this is, as other studies have not found it to add much to multimodal analgesia.