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A COMPUTERIZED TOMOGRAPHIC STUDY OF FRONTAL SINUS DRAINAGE PATHWAY AT NGUYEN TRI PHUONG HOSTITAL FROM 9/2020 TO 8/2022
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Abstract
Background: The frontal sinus drainage pathwway is a complex structure surrounded by frontal cells. Evaluation of CT Scan of the frontal sinus drainage pathway helps to perform endoscopic surgery safely and effectively. Objectives: To explore the prevalence of superior attachment of uncinated process, frontal recess cells and determine the relationship between the frontal sinus drainage pathwway and the frontal cells. Method: This is a descriptive cross-sectional study of radiological datas from 256 frontal recesses. Results: The prevalence of superior attachment of uncinated process types was 36,7% for type 1, 23,4% for type 2, 23,4% for type 3, 7,4% for type 4, 5,1% for type 5 and 3,9% for type 6. The prevalence of frontal cells: The Agger nasi cell was 93%, supra agger cell was 33,2%, supra frontal cell was 10,9%, supra bulla cell was 43,4%, supra frontal cell was 7,4%, supra orbital ethmoid cell was 14,5% and frontal septal cell was 8,6%. The proportion of the frontal sinus drainage pathway opening into the middle meatus was 83,6% and the ethmoidal infundibulum was 16,4%. The mean diameter of the frontal sinus ostium was 6,3 ± 2,1 mm. The presence of supra bullar frontal cells and supra orbital ethmoid cells were associated with a significantly narrower frontal ostium diameter (p<0,05). Conclusions: CT scan is the necessary method to evaluate the frontal sinus drainage pathwway before endoscopic frontal sinus surgery.
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Keywords
Frontal sinus drainage pathway, superior attachment of uncinated process, frontal cells
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