Maximum extension and regression rate of cutaneous sensory block obtained with the external oblique intercostal block or the modified thoracoabdominal nerves block through perichondrial approach in patients undergoing laparoscopic cholecystectomy

Bilateral EOIB and M-TAPA produce a comparable sensory cutaneous block in the anterior abdomen, particularly in the umbilical and epigastric regions. Additionally, the midabdominal cutaneous blocked area was greater in patients undergoing M-TAPA, suggesting a more consistent distribution along the anterior cutaneous branches of the thoracoabdominal nerves.