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KMID : 0361020230660060381
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Korean Journal of Otolaryngology - Head and Neck Surgery
2023 Volume.66 No. 6 p.381 ~ p.386
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A Radiological Study on the Location of Nasolacrimal Duct in Koreans
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Koo Hyung-Bon
Son Sang-Jun
Lee Jae-Hoon
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Abstract
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Background and Objectives The prelacrimal recess (PA) approach can be used to removePA lesions while preserving the nasolacrimal duct (NLD). In this regard, it is important to un-derstand the anatomical structure of NLD in relation to the lateral nasal wall. The purpose ofthis study was to measure NLD and the surrounding structure using the sinus CT.
Subjects and Method We used the coronal, axial, and sagittal images to measure the fol-lowing areas: a distance (M1) between nostril and the most anterior part of the lower end ofNLD (NLD-LE); a vertical distance (M2) between the attachment line of inferior turbinate(IT) to lateral wall and the NLD-LE; a distance (M3) between the NLD-LE and nasal cavityfloor (NF); a diameter (M4) of the NLD-LE; and an angle (M5) between NF and the extendedline of the diameter of the NLD-LE.
Results The right side of M1 was 26.45±3.69 mm and the left was 25.95±3.77 mm. Theright side of M2 was 1.36±2.07 mm and the left was 0.98±1.86 mm. The right side of M3 was17. 39±3.46 mm and the left was 17.52±3.15 mm. The right side of M4 was 7.89±1.66 mm andthe left was 7.96±1.60 mm. The right side of M5 was 46.69°±9.97° and the left was 45.04°±10. 25°.
Conclusion In Korean adults, on the average, the NLD-LE was present at 25 mm and 45°from the nasal entrance, 17 mm above the NF, and the diameter of NLD-LE was 8 mm. TheNLD-LE is adjacent to the lateral wall attachment of the IT, but there may be individual dif-ferences.
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KEYWORD
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Computed tomography, Inferior turbinate, Nasolacrimal duct, Prelacrimal recess, Radiological measurement
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