External oblique intercostal block: an anatomical study in soft- embalmed Thiel cadavers

In this cadaveric study, the EOI block demonstrated limited anterior spread, and the anterior branches of the thoracoabdominal nerves were not involved. These findings suggest that the EOI block may not reliably provide midline sensory blockade and may have limited utility for mid-abdominal analgesia. The implications of these cadaveric findings warrant further validation in clinical studies.