Correlation Analysis To Hyoid Position, Retroglossal Airway Minimum Cross-sectional Area And Severity Of Obstructive Sleep Apnea Hypopnea Syndrome

Objective To investigate the correlation between the position of hyoid, minimum cross-sectional area of retroglossal airway and the severity of patient with obstructive sleep apnea hypopnea syndrome.Method (1)57patients with OSAHS who were hospitalized in the department of Otolarynpharyngology-Head and Neck Surgery of Yantai Yuhuangding Hospital of Qingdao University and diagnosed by PSG were included in the research.(2) All patients received CT scan with the position of supine and Frankfort horizontal plane perpendicular to the ground.(3) The images of upper airway of patients with OSAHS were segmented and reconstructed by computer. Mark the center point of the hyoid bone as H, the lowest point of the chin as Me, the minimum cross-sectional area of retroglossal as s,the mandibular plane as MP, the projection point of the H-mandibular plane as h. Mark the H-Me-MP angle a as a sigh of up or down position of hyoid and mark the rate of h-Me/h-PW r as a sigh of front or rear position of hyoid.(4)Correlation analyses were made by SPSS20between the AHI, r and a.Results In57cases of patients with OSAHS, the parameters aand AHI have positive correlation(R=0.305,P=0.021);s and AHI have negative relations (R=-0.441,P=0.001); r and AHI have no correlation.Conclusion In patients with OSAHS,the severity of the disease is related to the position of the hyoid.With the development of the disease, the position of hyoid show a downward trend.The trend may be coursed by the accumulation of adipose tissue and soft tissue in the floor of mouth.On the other hand,the trend maybe exacerbations the severity of the disease.