The Significance Of The Magnetic Resonance Imaging On Obstructive Sleep Apnea Hypopnea Syndrome Upper Airway And Surrounding Tissue

Object:To discuss the upper airway's differences between obstructive sleep apnea hypopnea syndrom (OSAHS) patients and no snore normal person by magnetic resonance imaging (MRI )technology, which soft tissue imaging good. Also, explore magnetic resonance imaging (MRI) action on positioning diagnosis and surgical solution designing of patients with obstructive sleep apnea hypopnea syndrom (OSAHS).Materials and Methods:30 OSAHS patients were diagnosed by polysomnography monitoring. All of the patients were without any treatment. By questionnaire, 28 volunteers were confirmed by themselves or their family without the constant loud snoring, nighttime breath-holding nor night apnea phenomenon. The nasal unobstructed healthy men were as control group. Compared the sizes of nasophar,arcuspalatopharyngeu,glossopharyngeum and laryngopharynx between OSAHS and the control ,scaned and measured upper airway by MRI. On axial view,compared upper airway cross-sectional area of each pharynx section,upper airways'sagittal diameter and cross-sectional diameter, cross-sectional area of fat pad beside the arcuspalatopharyngeus,pharynx wall thickness,space between ascending branch,Pharynx former diameter and retropharyngeal diameter.On sagittal view , compared the cross-sectional area of the tongue and the soft palate.Result:Compared with no snore contrast ,each index of OSAS patients was commonly smaller, including the sagittal,transverse diameter, sagittal/transverse diameter ratio, sectional area and volume. The difference between the two groups was statistically significant (P < 0.05).The volumes of structures surrounding airway and fat pad were significantly greater than the control group. soft tissue spacing and pharynx former diameter were obviously less than control group. Differences between the two groups were statistically significant. Mandibular spacing had no obvious difference, there was no statistically significant difference between groups.Conclusion:The thickening soft tissue and increasing fat pad of upper airway is the main cause ofOSAHS pathogenetic mechanisms on morphology. MRI has great value in the study of OSAHS. As diagnosis and position diagnostic tools, MRI could not be ubstitute for sleep monitoring all night. It gives instructive significance for OSAHS treatment and designing of the operation plan.