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Chapter 25. Endoscopic Middle Ear Surgery
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The most important characteristic of anterior tympanic isthmus is
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A. Next to the jugular bulb
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B. Communicates with middle cranial fossa dura
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C. Largest ventilation route to attic
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D. Irregular cavity filled with air
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E. Contains tympanic segment of facial nerve
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Microscopic approach cannot properly visualize this region.
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These are advantages of endoscopic technique, except
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A. Minimally invasive approach
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B. Easier and requires a smaller learning curve
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C. No need of periauricular incisions
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D. Preservation of mastoid cell system
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E. Possible to restore ventilation routes to attic
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Essential instruments for endoscopic ear surgery are:
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A. Hopkins endoscope of 3 or 4 mm diameter, 0 degree lent
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B. Camera system with triple charge-coupled device (3CCD)
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C. Xenon light and fiber-optic cable
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D. Microsurgical instruments
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Cholesteatoma residual disease is most frequent in these sites, except
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D. Undersurface of the scutum
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E. Anterior epitympanic recess