Analysis Of Related Factors Of Hearing Loss In Chronic Suppurative Otitis Media

Objective:To analyze the related influencing factors of hearing loss in chronic suppurative otitis media,and to provide reference for the protection of hearing in patients with chronic suppurative otitis media.Methods:A total of 152 patients with chronic suppurative otitis media who underwent otolaryngological surgery in our hospital from April 2014 to October 2018 were divided into static group(68 cases)and active group(84 cases).The auditory values of air conduction,bone conduction and air bone guide were recorded in each group.Age,course of disease,size of tympanic membrane perforation,damage of auditory ossicular chain and degree of middle ear lesion were classified into 1-5 grades.The correlation between age,course of disease,size of tympanic membrane perforation,degree of ossicular chain destruction,pathological state of middle ear and hearing loss was studied.Results:1.There was a positive correlation between age classification and air conduction threshold in active and resting periods(r=0.268,P=0.014 in active period and R=0.513 in resting period,P<0.001).There was a positive correlation between age classification and bone conduction threshold in active and resting periods(r=0.253,P=0.020;r=0.549,P<0.001).The correlation coefficient between resting age grading and bone conduction threshold was significantly higher than that of active age(Z=-2.152,P<0.05),that is,resting age had greater influence on bone conduction threshold than active age.There was a weak positive correlation between resting age grading and difference of air-bone conduction threshold(r=0.248,P=0.042).2.There was a positive correlation between active stage and quiescent stage stages and air conduction threshold(r=0.272?P=0.012 in active stage and r=0.276 in quiescent stage,P=0.023).There was a positive correlation between active stage and quiescent stage and bone conduction threshold(r=0.300,P=0.006;r=0.305,P=0.011).There was a positive correlation between the classification of tympanic membrane perforation and the threshold of air conduction and hearing(r=0.534 in active phase,P<0.001;r=0.486 in static phase,P<0.001).There was a positive correlation between the grade of tympanic membrane perforation and the threshold of bone conduction in active and static phases(r=0.424,P<0.001;r=0.395,P=0.001).There was a positive correlation between the classification of tympanic membrane perforation and the difference of air-bone conduction,threshold(r=0.351 in active phase,P=0.001;r=0.331 in static phase,P=0.006).3.There was a positive correlation between the classification of auditory ossicular chain injury and the threshold of air conduction and hearing(r=0.402 in active phase,P<0.001;r=0.460 in static phase,P<0.001).There was a positive correlation between the grade of ossicular chain injury and ossicular conduction threshold(r=0.298 in active phase,P<0.001;r=0.331 in static phase,P=0.006).There was a positive correlation between the classification of ossicular chain injury and the difference of air-bone conduction threshold(r=0.240 in active phase,P=0.028;r=0.313 in static phase,P=0.009).4.There was a positive correlation between middle ear state classification and air conduction threshold in active and resting stages(r=0.445,P<0.001;r=0.638,P<0.001).There was a positive correlation between the grade of middle ear state and the threshold of bone conduction(r=0.370 in active phase,P=0.001;r=0.472 in static phase,P<0.001).There was a positive correlation between the middle ear state classification and the difference of air-bone conduction threshold(r=0.258 in active phase,P=0.018;r=0.490 in static phase,P<0.001).5.There was a positive correlation between the classification of middle ear lesions and the threshold of air conduction and hearing(r=0.445 in active phase,P<0.001;r=0.638 in static phase,P<0.001).There was a positive correlation between the grade of middle ear lesions and the threshold of bone conduction(r=0.370 in active phase,P=0.001;r=0.472 in static phase,P<0.001).There was a positive correlation between the classification of middle ear lesions and the difference of air-bone conduction threshold(r=0.258 in active phase,P=0.018;r=0.490 in static phase,P<0.001).6.Comparisons of age,course of disease,tympanic membrane perforation,middle ear lesion status and ossicular chain injury grades between active and resting’ stages:the age classification of active stage was significantly higher than that of resting stage(Z=3.064,P=0.002).There was no significant difference in course of disease,tympanic membrane perforation,middle ear status and ossicular chain injury grades between active and static stages(P>0.05).Conclusions:1.With the increase of age and duration of CSOM,the greater the perforation of tympanic membrane,the more serious the destruction of ossicular chain,the more severe the inflammation of middle ear,and the more the hearing loss of air conduction and bone conduction.2.The active age of CSOM patients is significantly higher than that of resting age.