Pseudo-conductive Hearing Losses

1
Pseudo-conductive Hearing Losses

• Bastaninejad, Shahin, MD, Assistant Professor of
  ORL, TUMS, AmirAlam Hospital

2
Definition
of Pseudo-conductive Hearing Loss

• Apparent conductive hearing loss on audiometric
  testing, that is not due to pathology in the
  external or middle ear

3
Case Presentation

• 10yr old boy
• CHL in Left ear, found during a routine
  school-hearing test
• Left side Rinnes test was negative
• AR in Left ear Ipsi.?neg., Contra.?Pos.
• CT?nl.
• No history of trauma and

4
Hamad Al Muhaimeed, et al. Conductive hearing
loss investigation of possible inner ear origin
in three cases studies. The Journal of
Laryngology Otology November 2002, Vol. 116,
pp. 942945
5
Case Cont.

• The provisional diagnosis was ossicular
  disruption medial to the neck of the stapes (to
  explain the presence of the contralateral
  stapedial refl