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ENT General cbb3dc06

Dysfunction of tympanic membrane is characterized by all except -

A
Normal 'cone of light'
B
Retracted TM
C
Nonprominent umbo
D
Fullness in middle ear
High-Yield Explanation
Retracted Tympanic Bembrane It is the result of negative intratympanic pressure when Eustachian tube is blocked Characteristics It appears dull and lusterlessQ Cone of light is absent or interruptedQ Handel of malleus appears foreshortened Q Lateral process of malleus becomes more prominent Q Anterior and posterior malleal folds become sickle shaped Q It is immobile or has limited mobility when tested with pneumatic otoscope or siegle’s speculum. Features of Normal Tympanic Membrane It is shiny and pearly grey in colour Has concavity on its lateral surface Cone of light seen in antero – inferior quadrant It’s transparency varies It is mobile when tested with pneumatic otoscope or siegle’s speculum.

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