Weak Tympanic Membrane or Sinus Tympanic Retracted Ear Drum
Under normal circumstances, the air pressure on both sides of the eardrum is almost the same. The pressure is maintained with the help of Eustachian tube, a tube that connects the middle ear to the nasopharynx. Eustachian tube helps in equalizing air pressure and also facilitates the drainage of secretions from the middle ear. Thus, it helps in preventing ear infections. The eardrum gets retracted whenever a negative pressure builds up behind the eardrum. This happens due to a Eustachian tube dysfunction.
The Eustachian tube can get blocked due to upper respiratory infections, inflamed sinuses or allergies. Most of the middle ear infections are associated with fluid buildup in the middle ear. If the opening of Eustachian tube gets blocked, the air pressure on both sides of the eardrum cannot be equalized, this in turn, may cause the eardrum to retract. Presence of tumors or masses in the nasopharynx can also block Eustachian tube, which in turn may cause the eardrum to be pulled inwards. If the eardrum is pulled inwards, the sounds may appear to be louder. Increased hearing sensitivity and ear pain are the most common retracted ear symptoms.
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Dr. P.G. Visvanathan
M.S., D.L.O., F.R.A.C.S., F.I.C.S.
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