Analysis Of The Causes Of Dysphagia After Posterior Atlantoaxial Reduction

INTRODUCTION : Difficulty in swallowing after posterior atlantoaxial reduction is one of the rare and serious complications,and the reasons for the formation of this complication are currently not uniform.METHODS:To study the changes of various anatomical data after posterior atlantoaxial reduction surgery,compare the effects of different surgical methods on postoperative dysphagia,and explore the causes of postoperative dysphagia.RESULTS:After the operation,5 patients complained of difficulty swallowing.(1)Compared with the AB group,the difference between the occipital and hyoid bone spacing before and after the operation was statistically significant(P <0.01),and the difference between the remaining anatomical data was not statistically significant(P> 0.05).(2)Compared with different surgical methods,the number of patients who experienced dysphagia after posterior atlantoaxial interarticular fusion reduction(0)and the number of patients who experienced dysphagia after posterior occipital neck reduction(27.8%,5 persons)The difference was statistically significant(P <0.05).The difference between the former occipital andhyoid interval(2.93 ± 3.5)mm was significantly smaller than the latter(7.4± 5.6)mm(P <0.05).(3)The percentage difference of oropharyngeal cavity cross-sectional area before and after the operation is linearly related to the difference between the slope axis angle(r = 0.762,P <0.01),and has no obvious correlation with other anatomical data(P> 0.05);There is no obvious correlation between the value and other anatomical data(P >0.05).CONCLISONS:Patients who underwent posterior occipitocervical direct dislocation reduction have a higher risk of dysphagia after surgery,which may be due to a decrease in compliance of the suprahyoid muscle group caused by excessive expansion of the craniocervical junction.