P217 Evaluation of upper airway (ua) anthropometry using magnetic resonance imaging (mri) and lateral cephalometry in patients of obstructive sleep apnoea (osa) in north indian population

Aim To study the anthropometric measurements of UA in patients of OSA and assess the relation between UA anatomy and severity of OSA. Introduction Anatomical and nonanatomical factors are implicated in OSA in which repetitive collapse of UA occurs. Scarcity of data regarding UA anhropometry in OSA exist especially in Indian population. Materials and Methods A prospective observational case control study was carried in which 60 OSA (mild:n=20, moderate:n=20, severe:n=20) and control group (n=20) underwent MRI and lateral cephalometry of UA. Linear Regression analysis (univariate and multivariate linear regression) of various parameters was done to find out the factors correlated with OSA. Results In MRI, distance between hyoid bone and posterior nasal spine (H-PNS) and hyoid and posterior pharynx wall near vertebral column (H-COL) was found to be statistically significant (mild=60.23 mm, moderate=68.72 mm, severe=77.26 mm: control=60.23 mm:p=0.001) and (mild=14.8 mm, mod=15.2 mm, severe=19.09 mm: control=11.5 mm:p Conclusion In OSA ,significant alteration of anthropometry of upper airway occurs and is associated with severity of OSA.