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DAMS Class test Series to ENT for your PG Exam Preparations

DAMS Class test Series to ENT for your PG Exam Preparations

DAMS Class test Series to ENT for your PG Exam Preparations  Most reliable landmark in otoscopy is a. Cone of light
b. Umbo
c. Handle of malleus
d. Lateral process of malleus
Solution. 1 Explanation:B
Tympanic Membrane:
Pars Tensa:
It forms most of tympanic membrane.
The central part of pars tensa is tented inwards at level of the tip of malleus called the umbo.

A bright cone of light can be seen radiating from the tip of malleus to the periphery in the antero-inferior quadrant. Pars Flaccida or Shrapnel’s Membrane:
Situated above the lateral process of malleus between the notch of Rivinus and the anterior and posterior malleal fold Anterior malleolar fold is longer than posterior.
May appear slightly pinkish
Important Points:
Umbo-The most important landmark in normal ear
Lateral process of malleus- The most important landmark in diseased ear as it is least obliterated in diseases.
Correct Answer. b

(2). Which of the following is false about tympanic membrane? a. Cone of light is antero-inferior
b. Shrapnel’s membrane is also known as pars flaccida
c. Healed perforation has three layers
d. Anterior malleolar fold is longer than posterior.
Solution. 2 Answer: C. Healed perforation has three layers Cone of light is antero-inferior
·Shrapnel’s membraneis also known as pars flaccid ·Anterior malleolar fold is longerthan posterior.
Tympanic membrane consists of three layers-
1. Outer epithelial layer
2. Inner mucosal layer
3. Middle fibrous layer, which encloses the handle of malleus and has three type of fibres- the radial, circular and the parabolic. Perforated tympanic membrane heals usually by two layers and not three.
Correct Answer. c

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