Tuesday, October 3, 2017

Types of tympanic membrane perforation

Hello Awesomites ! :D

There are different types of perforation of tympanic membrane. We name it on the basis of :-
1. Size of perforation
2. Site of perforation

So, let us begin.

ACCORDING TO SIZE OF PERFORATION,
1. Pinhole :- 1-2 mm in size.
2. Small :- Area involving one quadrant or <10% of pars tensa.
3. Medium :- Area involving 2-3 quadrant or 10-40% of pars tensa.
4. Subtotal :- Area involving the pars tensa >75% and does not involve the annulus.
5. Total :- A total perforation is present in tympanic membrane. Tympanic membrane is essentially absent and involve annulus also. 

ACCORDING TO SITE OF PERFORATION,
1. Anterior 
2.Posterior
3.Inferior
4.Central

OR,

1.Central :- A simple perforation in pars tensa with intact annulus. 
                   Perforation is surrounded all around by pars tensa.
2. Marginal :- Perforation in the pars tensa surrounded partly by pars tensa and partly by bone.
3. Attic :- Perforation in pars flaccida.

I found this topic very confusing in my exams.
I hope it helped. :D



Have a great day ahead.
-Upasana Y. :) 

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