Furuya T, et al. - In this study performed on 27 adult female patients undergoing the laparoscopic resection of ovarian tumors under general anesthesia, researchers determined the dermatomal sensory block after lateral approach transversus abdominis plane (TAP) block (LTAP) and posterior approach TAP block (PTAP) under ultrasound (US) guidance. Before induction of general anesthesia, both the groups ie, those receiving LTAP and those receiving PTAP, received bilateral TAP blocks with 15 ml of 0.25% levobupivacaine on each side under US guidance, and the sensory blockade was assessed. They found that relative to LTAP under US guidance, PTAP offered a sensory block that involved a greater number of dermatomes and involvement of more cephalad dermatome blocked to sharp touch.