ENT

• Bing test is for conductive hearing loss.
• Gelle test is for otosclerosis.
• Normal Value of Compliance?

  • 0.35-1.45 mL
• Normal Value of Middle Ear Pressure?

  1. Adults -50 to+50
  2. Children -150 to+50
• Inter-aural latency difference of >0.2ms of wave 5 is diagnostic of Acoustic Neuroma
• Best Test for diagnosis of Acoustic Neuroma is MRI
• Best audiometric test for diagnosis of Acoustic Neuroma is BERA
• • Investigation?

  Electrocochleography


  SP/AP Ratio

  1. >30% suggestive of Meniere's disease
  2. >45% diagnostic of Meniere's disease

  
• Recruitment seen in cochlear pathology
• SISI score of 70-100% indicates cochlear deafness