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| Study on Upper Airway Measurement of OSAHS Patients by CT |
| The First People’s Hospital of Jiujiang City，Jiujiang 332000，China |
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Abstract Objective：To explore the clinical value of CT scan in patients with obstructive sleep apnea syndrome（OSAHS）.Method：72 patients with OSAHS in our hospital from January 2013 to March 2015 were selected as the OSAHS group.30 health people were selected as the control group at the same time.CT scans were performed in patients from the top of nasopharynx to the cricoid region continuously.According to the rear edge of the hard palate，uvula tip and the tip of the epiglottis，the upper respiratory were divided into the nasopharyngeal region，the retropalatal area，the retroglottal area and the epiglottis area.The left-right diameter，anteroposterior diameter and cross section area of the minimum cross-sectional of upper respiratory tract in the two groups were measured and compared.Result：The measurement indexes of the retropalatal area and the retroglottal area in OSAHS patients were lower than those in the control group.The measurement indexes of the retropalatal area，the retroglottal area and the epiglottis area in the severe group were lower than those in the control group.The measurement indexes of the retropalatal area and the retroglottal area in the severe group were lower than those in the mild-moderate group.The differences above were all statistically significant（P<0.05）.The narrow situations in the retroglottal area and the epiglottis area of the mild-moderate group were better than those of the severe group，the differences were statistically significant（P<0.05）.Among the 72 patients，15 patients had one narrow zone，33 patients had two narrow zones，21 patients had three narrow zones，3 patients had four narrow zones.Conclusion：Spiral CT scan and measurement can get the location and extent of the stenosis of the upper airway，which has important guiding significance for clinical treatment.
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