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Diplomate exam > Otology, Audiology And Neurootology > Flashcards

Otology, Audiology And Neurootology Flashcards

1
Q

Nucleus of the lateral lemniscus receives input from:

A

Ipsilateral cochlear nucleus
Contralateral cochlear nucleus
Contralateral nucleus of the lateral lemniscus

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2
Q

Vestibulotoxic aminoglycosides?

A

Tobramycin
Gentamycin
Streptomycin

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3
Q

How will a sympathetic chain mass manifest?

A

Ptosis, neck mass

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4
Q

Prussack’s space, which is the most common site of pars flaccida cholesteatoma, is usually located where?

A

Epitympanum

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5
Q

What segment of the facial nerve passes through the undersurface of the lateral scc?

A

Tympanic segment

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6
Q

The ica is adjacent to what wall of the middle ear?

A

Anterior wall

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7
Q

What is the Karnofsky score 90-100? (Zubrod/Ecog performac scale 0)

A

Fully active, able to carry on all predisease activities without restriction.

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8
Q

What is the Karnofsky score 70-80 ? (Zubrod/Ecog performac scale 1)

A

Restricted in physically strenous activity but ambulatory and able to carry out work of light or sedentary nature. ( ex. Light housework, office work)

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9
Q

What is the Karnofsky score 50-60? (Zubrod/Ecog performac scale 2)

A

Ambulatory and capable of all self-care but unable to carry out any work activities. Up and about more than 50% of waking hours.

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10
Q

What is the Karnofsky score 30-40? (Zubrod/Ecog performac scale 3)

A

Capable of only limited self-care, confined to bed or chair 50% or more of waking hours.

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11
Q

What is the Karnofsky score 10-20? (Zubrod/Ecog performance scale 4)

A

Completely disabled, cannot carry on self-care; totally confined to bed or chair.

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12
Q

What is the Karnofsky score 0? (Zubrod/Ecog performance scale 5)

A

Death

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13
Q

What are the stages of bony exposure in the translabyrinthe approach?

A

1st: complete mastoidectomy
2nd: complete labyrinthectomy
3rd: actual decompression of the middle and posterior fossa dura and removal of bone around the IAC
4th: skeletonization of the IAC

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14
Q

Suboccipital approach is aka?

A

Rectosigmoid (preserves hearing)

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15
Q

This approach ideally suited for intracanalicular acoustic neuroma?

A

Middle fossa

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16
Q

Infarction of the lateral tegmental pons during tumor manipulation at the brainstem is aka?

A

Atkinson’s syndrome

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17
Q 
Limit of the infratemporal fossa?
Superior?
Medial?
Lateral?
Anterior?
Posteroinferior?
A 
Greater wing of sphenoid and the temporal bone
Lateral pterygoid plate
Mandibular ramus and condyle
Postrior wall of the maxillary sinus
Opening into the parapharyngeal space
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18
Q

What are the basic post-auricular approaches to the infratemporal fossa by Fisch (1982)?

A

Type A- facial nerve transposition required
Typ B- approach for chordoma of the clivus
Type C- permits access to the foramen lacerum up to the posterior aspect of the maxillary sinus and nasopharynx

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19
Q

What is the hearing gain of the area of the oval tympanic membrane to the oval window?

A

25 dB

20
Q

Area of the auditory pathway mainly involved in processing binaural input?

A

Olivary complex

21
Q

Growth of acoustic neuromas?

A

0.1-0.2 mm/yr

22
Q

What is trautmanns triangle?

A

Triangle between the external prominence of the lateral and posterior SCCs and the posterosuperior corner of the mastoid.

23
Q

What is the average diameter of the lAC?

A

6.8 mm

24
Q

What is the upper limit of normal diameter of the lAO

A

8 mm

25
Q

What is the cog?

A

A ridge of bone that extends inferiorly from the tegmen epitympanum and partially separates the anterior epitympanic compartment from the mesoepitympanum.

26
Q

What is the average fundamental frequency for a child? Adult female? Adult male?

A

250 Hz, 200 Hz, 150 Hz

27
Q

What does blue mantles of manasse refer to?

A

Basophilic appearance on hematoxylin and eosin staining of bone in the active stage of otosclerosis.

28
Q

What are the AAO-HNS indications for myringotomy and tympanostomy tube placement?

A

Three or more episodes of OM in 6 months; four or more episodes in 12 months.
Hearing loss >30 dB from OME.
OME >3 months.
Chronic TM retraction.
Impending mastoiditis or other complication of OM.
Autophony secondary to patulous eustachian tube.
ET dysfunction secondary to craniofacial anomalies or head and neck radiation.

29
Q

Three most common organisms of OM that lead to intracranial infection?

A

Streptococcus faecalis
Bacteroides fragilis
Proteus

30
Q

3 most common organisms causing meningitis in OM?

A

H. infiuenzae type b
S. pneumoniae
Neisseria meningitidis

31
Q

What is the Jarisch-Herxheimer reaction?

A

Fever and flulike symptoms beginning within 4 hours of commencing treatment for secondary syphilis.

32
Q

What is the treatment for otoshyphilis?

A

2.4 million U of Benzathine penicillin IM every week for at least 3 weeks (up to 1 year) or

10 million U of penicillin G IV every day for 1 0 days followed by 2.4 million U of IM benzathine penicillin every week for 2 weeks plus prednisone 40-60 mg every day for 2-4 weeks followed by a taper.

33
Q

% of hiv infected patients will have otologic symptoms with hearing loss, otalgia, and otorrhea as the most common symptoms?

A

56%

34
Q

Primary causative agent in OE associated with AIDS as in the general population?

A

P. Aeruginosa

35
Q

4 histopathologic types of presbycusis?

A

Sensory
Neural
Metabolic
Mechanical/conductive

36
Q

Presbycusis characterized by hair loss. Abrupt, steep high frequency snhl, with slow progressive bilateral progression beginning at middle age.

A

Sensory presbycusis.

37
Q

Presbycusis associated with loss of spiral ganglion cells and axons. Gradual hearing loss with a moderate slope towards high frequency.

A

Neural presbycusis.

38
Q

Presbycusis associated with strial atrophy. Flat sensory loss. Patients do well with amplification.

A

Metabolic presbycusis.

39
Q

Presbycusis due to stiffness of the basilar membrane?

A

Mechanical/conductive

40
Q

Vestibular disorders seen in the elderly.

A

Presbystasis.

41
Q

Cause of usual rhinologic complaints in the elderly?

A

Loss of autonomic control

42
Q

Dysphonia present in — of elderly patients?

A

10%

43
Q

Syndrome due to loss of about 1/4 of active secretory parenchymal volume and its replacement by connective tissue and fat?

A

Dry mouth syndrome

44
Q

What is the voits anastamosis?

A

Superior vestibular nerve to the sacculus

45
Q

What is oorts anastamosis?

A

Vestibulocochlear anastamosis

46
Q

Content of endolymph?

A

Low na content (5-25 mM/L), high potassium content (150-160 mM/L), produced by marginal cells of the striae vascularis

Diplomate exam (7 decks)

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