GRADING FOR INTERORBITAL DISTANCE: DOES IT VARIATE IN SINONASAL PATHOLOGIES?
1Süleyman Demirel University Faculty of Medicine, Department of Otorhinolaryngology, Isparta, Turkey2Süleyman Demirel University Faculty of Medicine, Department of Radiology, Isparta, Turkey Objective: Anatomic variations and configurations of ethmoid sinuses (along with dimensions) are very important for endoscopic sinus surgeon. The most dangerous complications of endoscopic sinus surgery are orbital and intracranial ones. The purpose of this study was to make a classification of interorbital distance and to determine whether it was altered by some sinonasal pathology.
Materials and Methods: Five hundred fifty-four adult patients (321 Male, 233 female) underwent paranasal sinus computed tomography imaging for evaluation of either rhinological or orbital complaints were included in this study. The patients were classified as follows: patients with nasal polyposis (n= 75), patients with chronic rhinosinusitis (n= 192), patients without sinonasal disease (n= 287). Interorbital distance and Keros typing of all patients were measured from the same standard location of coronal computed tomography of paranasal sinuses.
Results: There was no statistically significant difference among three groups regarding to two types of classifications.
Conclusions: Computed tomography of paranasal sinus before endoscopic sinus surgery may give some clue about surgical difficulties in the region of the narrowest part of ethmoids (interorbital distance). This parameter has not been influenced from sinonasal pathologies such as nasal polyposis and chronic rhinosinusitis.
Keywords : Computed tomography, complication, endoscopic sinus surgery, nasal cavity, paranasal sinus disease