title: To Study Brain Stem Auditory Evoked Potential in Patients with Type 2 Diabetes Mellitus- A Cross- Sectional Comparative Study.
abstract: BACKGROUND
  Neuropathy is one of the commonest complications of Diabetes Mellitus (DM). Apart from having peripheral and autonomic neuropathy patients with type 2 DM may also suffer from sensory neural hearing loss, which is more severe at higher frequencies. However, few studies have done detailed evaluation of sensory pathway in these patients. In this study brain stem auditory evoked potential is used to detect the acoustic and central neuropathy in a group of patients with type 2 DM with controlled and uncontrolled blood sugar.
  
  
  OBJECTIVE
  To study brain stem auditory evoked potential in patients of type 2 DM with controlled and uncontrolled blood sugar and to correlate the various parameters e.g., age (years), weight (kilograms), height (meters), BMI (kg/m2), HbA1c (%) in patients with type 2 DM with controlled and uncontrolled blood sugar.
  
  
  METHODS
  Cross-sectional comparative study conducted from January 2014 to January 2015. Total 60 patients with type 2 DM of either sex, between age groups of 35-50 years were enrolled from the Diabetic Clinic of Medicine department, of a tertiary care hospital. Based on the value of HbA1c, patients were divided in two groups with controlled and uncontrolled blood sugar and with each group comprising of 30 patients. BERA (Brainstem Evoked Response Audiometry) was done in both the groups on RMS ALERON 201/401. Recordings were taken at 70dB, 80dB and 90dB at 2KHz frequency. Absolute latency of wave I, III, V and interpeak latencies I-III, III-V and I-V were recorded.
  
  
  RESULTS
  Mean±SD of the absolute latency of BERA waves I, III, V and interpeak latencies I-III, III-V and I-V at 2 KHz and at varying intensity of 70dB, 80dB and 90dB in uncontrolled group of DM were delayed and were significant as compared to controlled group of DM.
  
  
  CONCLUSIONS
  If BERA is done in diabetic patients, central neuropathy can be detected earlier in uncontrolled groups of diabetic patients.
authors.affiliation: Postgraduate Resident, Department of Physiology, GMC , Aurangabad, Maharashtra, India .
authors.forename: Mishra Indira
authors.initials: MI
authors.lastname: Sushil
authors.affiliation: Associate Professor, Department of Physiology, GMC , Aurangabad, Maharashtra, India .
authors.forename: J N
authors.initials: JN
authors.lastname: Muneshwar
authors.affiliation: Professor and Head of Department, Department of Physiology, GMC , Aurangabad, Maharashtra, India .
authors.forename: Sayeeda
authors.initials: S
authors.lastname: Afroz
keywords: Absolute latency; Brainstem evoked response of audiometry; Central neuropathy; Interpeak latency