TY - JOUR AU - Palacios, Maria Katerina AU - Amable, Jay Pee AU - Capio, Kea PY - 2022/06/05 Y2 - 2024/03/28 TI - Radiologic Evaluation of the Anterior and Posterior Ethmoidal Foramen and Optic Canal by Paranasal Sinus Computed Tomography Scan among Adult Filipinos JF - Philippine Journal of Otolaryngology Head and Neck Surgery JA - Philipp J Otolaryngol Head Neck Surg VL - 37 IS - 1 SE - Original Articles DO - 10.32412/pjohns.v37i1.1733 UR - https://pjohns.pso-hns.org/index.php/pjohns/article/view/1733 SP - 20 AB - <div class="page" title="Page 1"><div class="section"><div class="layoutArea"><div class="column"><p><strong>ABSTRACT</strong></p></div></div></div></div><p><strong>Objective: </strong><span style="font-size: 0.875rem; font-family: 'Noto Sans', 'Noto Kufi Arabic', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen-Sans, Ubuntu, Cantarell, 'Helvetica Neue', sans-serif;">To measure the average distances from anterior lacrimal crest (ALC) to anterior ethmoidal foramen (AEF), anterior ethmoidal foramen to posterior ethmoidal foramen (PEF) and posterior ethmoidal foramen to optic canal (OC) using plain paranasal sinus (PNS) computed </span><span style="font-size: 0.875rem; font-family: 'Noto Sans', 'Noto Kufi Arabic', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen-Sans, Ubuntu, Cantarell, 'Helvetica Neue', sans-serif;">tomography (CT) scans of adults in a tertiary private hospital in the Philippines.</span></p><p><strong>Methods:</strong></p><p>            <strong>Design: </strong><span style="font-size: 0.875rem; font-family: 'Noto Sans', 'Noto Kufi Arabic', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen-Sans, Ubuntu, Cantarell, 'Helvetica Neue', sans-serif;">Retrospective review of plain PNS CT scans</span></p><p>            <strong>Setting: </strong><span style="font-size: 0.875rem; font-family: 'Noto Sans', 'Noto Kufi Arabic', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen-Sans, Ubuntu, Cantarell, 'Helvetica Neue', sans-serif;">Tertiary Private Teaching Hospital</span></p><p><strong>           Participants</strong>: <span style="font-size: 0.875rem; font-family: 'Noto Sans', 'Noto Kufi Arabic', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen-Sans, Ubuntu, Cantarell, 'Helvetica Neue', sans-serif;">One hundred four (104) plain PNS CT scans from January 2018 to </span><span style="font-size: 0.875rem; font-family: 'Noto Sans', 'Noto Kufi Arabic', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen-Sans, Ubuntu, Cantarell, 'Helvetica Neue', sans-serif;">December 2020 were considered for inclusion.</span></p><p><strong>Results: </strong><span style="font-size: 0.875rem; font-family: 'Noto Sans', 'Noto Kufi Arabic', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen-Sans, Ubuntu, Cantarell, 'Helvetica Neue', sans-serif;">Of the 104 PNS CT scans, 35 were excluded - seven for age less than eighteen, six for undistinguishable PEF and twenty-two for chronic rhinosinusitis. The remaining 69 PNS CT scans demonstrated identifiable structures, with overall average distances from ALC to AEF of 23.71 ± 2.43 mm, AEF to PEF of 10.87 ± 2.39 mm and PEF to OC of 7.39 ± 2.28 mm.</span></p><p><strong>Conclusion: </strong><span style="font-size: 0.875rem; font-family: 'Noto Sans', 'Noto Kufi Arabic', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen-Sans, Ubuntu, Cantarell, 'Helvetica Neue', sans-serif;">Our study suggests average distances for localization of vital structures such as the anterior ethmoidal artery, posterior ethmoidal artery and optic nerve among Filipinos. Because of considerable variation between and within sexes, individual measurements should still be obtained for each patient in performing endonasal, skull base and orbital surgery.</span></p> ER -