Keywords : Keros
Assessment of depth of olfactory fossa in prefunctional endoscopic sinus surgery computed tomography scan of paranasal sinuses
European Journal of Molecular & Clinical Medicine,
2021, Volume 8, Issue 4, Pages 935-938
characterise India's population according to the Keros categorization (CT).
Materials and Methods: This study was conducted in our institution over a period of 1 year
(June 2018 to June 2019). Patients >16 years of age undergoing CT scan of paranasal sinuses
(PNS) were included. A total of 1200 patients' PNS CT scan studies were evaluated. The
vertical height of the lateral lamella was used to determine the depth of OF. Independent
samples t test and Chi Square test were used to examine the results by gender and laterality.
Results: OF had a mean depth of 5.16 ± 1.59 mm. The mean depth of OF between males and
females was statistically significant, but not between right and left sides. Keros type I was
discovered on 210 sides (17.5%), type II on 895 (74.6%), and type III on 95 sides (7.9
Conclusion: Even while the prevalence of the harmful type III OF is modest, it is
considerable, particularly among men and on the right side. To avoid iatrogenic
consequences, a preoperative assessment of depth is required.