For grommet incison where will you site the incision ?
What should be the direction of the incision ?
Grommet should always be sited in the antero inferior quadrant close to the eustachean tube orifice for better ventilatory function
Incision should be made along the line parallel to the radial fibers of the ear drum. This will enable the radial fibers to hug the grommet in position. The drum also will heal well after extrusion of the grommet.
What is the focal length of the objective lens in a microscope used for otological surgeries ?
Name the major advantage of microscope in otological surgery ?
What is the of magnification used to examine the ear drum ?
Both hands are free
Name the instrument shown
Which surgery is it commonly used ?
Name the advantages of using this instrument ?
Mollison's self retaining hemostatic mastoid retractor.
It is used in mastoid surgeries.
When this retractor is applied it:
Retracts the soft tissue
It stops bleeding.
Allows both hands to be free
Name this instrument
Where do you use this ?
It is a myringotome. (Myringotomy knife)
It is used to perform myringotomy
Enumerate the goals of cholesteatoma surgery
1. To remove all potentially erosive / invasive tissue
2. To create a smooth skin lined exteriorized cavity
3. To conserve residual hearing
4. To improve hearing if possible
Name the surgical procedure
Identify the numbered structures
1. Posterior canal wall (bridge)
3. Fossa incudis
5. Mastoid cavity after exenteration of air cells
Name the incison used in this surgery
Name the instrument used
Name any two surgical procedures where this incision is used
Rosen's trancanal incision
Name the flap elevated
Name the structure pointed with black dot
Which nerve's branch is it ?
Chorda tympani nerve
Identify the named structures
1. Chorda tympani nerve
2. Long process of incus
3. Stapedial tendon
4. Round window
You are seeing bony over hang being curetted during stapedectomy.
How much of bony over hang should be removed ?
What instrument is used for this purpose ?
What are the dangers of bony overhang removal ?
Bony overhang should be removed till the whole of the pyramidal process comes into view.
House's curette is used for this purpose.
Incus dislocation should be guarded against.
Name the type of tympanoplasty procedure illustrated
What are the prerequisites for this procedure ?
The diagram shows Type I tympanoplasty.
Prerequisites for Type I tympanoplasty are:
1. Presence of mobile ossicles
2. Patent eustachean tube
3. Perforated ear drum