Surgery of the Ear Flashcards
which breed is more prone to hyperplastic ear canals following infection?
cocker spaniels
what can be done for chronic, severe hyperplastic ear canals and failed medical management?
lateral ear canal resection
vertical ear canal resection
total ear canal ablation with lateral bulla osteotomy
what are indications for total ear canal ablation with lateral bulla osteotomy?
“end stage” otitis externa
moderate/severe hyperplasia
failed efforts at medical/surgical management
tumors involving horizontal canal
what are potential complications of total ear canal ablation?
hearing loss
facial nerve paralysis
persistent infection
what benign neoplasias occur in ears of dogs and cats?
ceruminal gland adenoma/”feline cystadenomatosis” old cats
papilloma
basal cell tumor
how can you treat otitis media with minimal otitis externa?
myringotomy, culture and sensitivity, antibiotics, +/- lavage
ventral bulla osteotomy, culture and sensitivity, antibiotics
how can you treat squamous cell carcinoma of the pinna in cats?
pinna excision
cryotherapy
what cranial nerve travels close to the middle ear?
facial nerve
what do cats have in their middle ear that dogs do not have?
septum
what neurologic signs can you see with otitis media?
facial nerve paralysis
horner’s syndrome
what neurologic signs can you see with otitis interna?
head tilt
nystagmus?
loss of balance?
what are indications for a lateral ear canal resection?
mild hyperplasia
tumors involving lateral wall of vertical canal
difficulty introducing medications
improves drainage and ventilation
what are indications for a vertical ear canal resection?
alternative to lateral ear canal resection
tumors confined to vertical canal
what is the prognosis of a total ear canal ablation?
generally excellent
what is a traumatic ear canal separation like if it was recent?
blood in canal
abnormal ear carriage
possible history of trauma
draining tract or abscess
what are malignant ear canal neoplasias in dogs and cats?
ceruminal gland adenocarcinoma
squamous cell carcinoma
should you consider canal resection for benign tumors?
yes
what is recurrence rate after a TECA in dogs for neoplasia?
0%
what is recurrence rate after a TECA in cats for neoplasia?
25%
what are indications for a ventral bulla osteotomy?
otitis media with minimal otitis externa
inflammatory polyps in cats
where are inflammatory polyps in cats usually?
2/3 nasopharyngeal
1/3 canal
how can you treat an inflammatory polyp in the nasopharynx?
traction +/- pred
VBO if recurs
how can you treat an inflammatory polyp in the ear canal?
VBO +/- traction attempt
how common is horner’s in cats after a ventral bulla osteotomy for inflammatory polyps?
> 80%
what is the most common treatment for aural hematoma?
incisional drainage: S-shaped incision with through and through sutures
who usually gets squamous cell carcinoma of the pinna of cats?
white haired cats
