15 - otitis

Question 1

1. what is waxy debris found in the ear canal produced by sebaceous and apocrine glands lining the canals called?

Answer 1

1. cerumen

Question 2

(otitis externa)

1. what is it?
2. what is most common cause of chronic otic inflammation in dogs?

Answer 2

1. inflammation of the external ear canal
2. allergic disorders

Question 3

(otitis externa - predisposing causes)

1. factors that alter microenvironment
2. breeds with ^ cerumen glands - like what?
3. stenotic ear canals - like what?
4. pendulous pinnae may restrict aeration
5. also excessive moisture can cause

Answer 3

2. cockers
3. shar-pei

Question 4

(otitis externa)

(perpetuating factors)

1. always secondary to a primary problem
2. caused by yeast, bacteria, otitis media, chronic pathologic changes

Question 5

(otitis externa)

dx?

Answer 5

px, otic exam, otic cyto, culture and sens

Question 6

(otitis externa)

(management)

1. resolve primary factors
2. resolve inflammation
3. treat any secondary infections

Question 7

(otitis media, interna)

1. inflammation of what?
2. usually extension of otitis externa through what?

Answer 7

1. middle ear
2. damaged tympanic membrane

(may see extension though auditory tube (more common in cats), or hematogenous spread)

Question 8

(otitis media, interna)

(diagnosis)

1. observation of what?
2. pain upon opening mouth
3. neurologic abnormalities

Answer 8

1. abnormal tympanic membrane

Question 9

(otitis media, interna)

1. long term abx based on culture and sens
2. ear flushing under GA may be indicated