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Chapter 25. Endoscopic Middle Ear Surgery

The most important characteristic of anterior tympanic isthmus is

A. Next to the jugular bulb

B. Communicates with middle cranial fossa dura

C. Largest ventilation route to attic

D. Irregular cavity filled with air

E. Contains tympanic segment of facial nerve

Microscopic approach cannot properly visualize this region.

A. Epitympanum

B. Prussak space

C. Mesotympanum

D. Hypotympanum

E. Retrotympanum

These are advantages of endoscopic technique, except

A. Minimally invasive approach

B. Easier and requires a smaller learning curve

C. No need of periauricular incisions

D. Preservation of mastoid cell system

E. Possible to restore ventilation routes to attic

Essential instruments for endoscopic ear surgery are:

A. Hopkins endoscope of 3 or 4 mm diameter, 0 degree lent

B. Camera system with triple charge-coupled device (3CCD)

C. Xenon light and fiber-optic cable

D. Microsurgical instruments

E. All items above

Cholesteatoma residual disease is most frequent in these sites, except

A. Long process of incus

B. Sinus tympani

C. Facial recess

D. Undersurface of the scutum

E. Anterior epitympanic recess

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