A COMPARATIVE STUDY OF BRAINSTEM EVOKED RESPONSE AUDIOMETRY IN DIABETIC AND NON-DIABETIC SUBJECTS
INTRODUCTION: The Prevalence of Diabetes Melilites Is Increasing All Over the World Particularly in The Developing Countries. Diabetes Is Associated with Hearing Impairment Which Has Been Described as Sensorineural in Origin, But Evidence Favoring a Specific Mechanism Is Insufficient. Brainstem Evoked Response Audiometry Is a Simple, Non-Invasive Procedure to Detect Early Impairment of Acoustic Nerve and Auditory Pathway, Even in The Absence of Specific Symptoms. The Present Study Is Under Taken to Evaluate the Impact of Type 2 Diabetes Mellitus on BERA Parameters. OBJECTIVES: To Analyze and Compare the Brainstem Evoked Response Audiometry in Diabetic Patients and Age and Gender Matched Controls. METHODS: 40 Type 2 Diabetic Patients Attending Outpatient Department of Otorhinolaryngology and Medicine, C. S. S. Hospital, Meerut and 40 Non Diabetic Age and Gender Matched Subjects from General Population Were Selected Randomly, With None of Them Having Complains of Hearing Loss and Were Subjected to Brainstem Evoked Response Audiometry (BERA). BERA Parameters Such as Latency of Wave I, II, III, IV, And V; Inter-Peak Latencies I-III, I-V and III-V Were Analyzed. BERA Parameters Were also assessed according to The Duration of Diabetes and Fasting Blood Glucose Levels. RESULTS: Patients with Type 2 Diabetes Mellitus Were Found to Have Subclinical Hearing Impairment as Revealed by Impaired Auditory Brainstem Response. In This Study Diabetic Patients Showed a Statistically Significant (p value<0.05) Delay in The Latency of Waves I, III and V and Inter-Peak Latency of Waves I-III, I-V and III-V When Compared to Controls. There Was a Positive Correlation Between Prolongation of Latencies and Duration of Diabetes Mellitus. The Latencies Were Also Found to Be Prolonged with altered blood glucose levels. CONCLUSION: The present study correlates with earlier findings that impaired BERA response in diabetic patients is a consequence of microangiopathy. Meticulous control of blood sugar levels is a must to prevent the early complications of diabetes, so that further damage to auditory pathway can be prevented. KEY-WORDS: Diabetes mellitus; Hearing; Brainstem evoked response audiometry (BERA).