The Study Of Possible Correlation Of Pharyngeal Obstruction Plane And OSAHS

Objective: To investigate the possible correlation of Pharyngeal obstruction planewith the morbitidy, severity, and its collapsibility in obstructive sleep apnea andhypopnea syndromes （OSAHS）. Methods: Sixty-two patients with OSAHS who hasbeen performed polysomnography （PSG） were selected, and their apnea hypopneaindex （AHI） and the lowest saturation of blood oxygen （SpO₂） were recorded．Allpatients were scanned by CT to get the site and size of mini-cross sectional area of thePharyngeal obstruction plane （S）. And they were all performed byelectrolaryngoscope and Muller test to determine the collapse degree of narrowpharyngeal cavity （T）. The possible correlation of S, AHI, and SpO₂will be explored.Results: The value of the average S which is located at the RP of Pharyngeal. AHIare significantly correlated with S in statistics because the related coefficient of AHIof mild, moderate, and serious OSAHS are-0.380,-0.524,-0.633（P<0．01）,respectively. While the related coefficient of minimum SpO₂of mild, moderate, andserious OSAHS are0.509,0.670,0.529（P<0.01）, respectively, that is to say, SpO₂aresignificantly correlated with S in statistics. The collapse degree of narrow pharyngealcavity（T） is significantly with the collapse degree of OSAHS,（F=11.263，P<0.01）.Conclusions: AHI and the lowest SpO₂are significantly correlated with S instatistics. And the accidents of OSAHS heavily depend on the values of the S. Withthe increasing of value of AHI, the OSAHS will get worse, and with the decreasing ofvalue of S, degrees of hypoxia symptoms will get worse in OSAHS. Such interestingresults are able to provide the theoretical foundation and technique parameters for thediagnosis and treatment of the disease.