ear Flashcards
discuss contamination of surgical field of the ear
rather than perform repeated lavage of the external ear canal it would be better to accept that eural surgery is a contaminated procedure. hence perioperative antibiotics are indicated.
four landmarks your should remember
anthelix
tragohelicine incision
intertragic incision
tragus
reasons for doing surgery in the ear
otitis extena
strictures of the ear canal
neoplasia of the ear canal
how to evaluate the ear tympanum
remmber ear goes from vertical to horizontal .
needto have a straight line to evaluate the tympanum,
pull the aer down
reasons for doing surgery of the external ear
otitis externa
neoplasia of the external ear
strictures of the ear canal
causes of the otits externa
bacteria and fungus
malasezia is the most common cause
how to tx acute otitis externa
treat medically
claen ear before topical therapy
systemic antibiotics if indicated for 3 wks
tx for fungual or mites infection for 3-4 wks
tx for chronic otits externa
surgery
procedure for evaluating the ear canal
otoscopy
surgical procedure of the ear canal
lateral ear canal resection
vertical ear canal resection
total ear canal ablation, combined with lateral bulla estatomy(TECA LBO)
LaCroix can give u better access to the horizontal portion and better accessibility to tx the dz ear.
if u hav a dog that comes with the stenotic nares chronic infection and fluid in bulla .which tech, will u use
TECA-LBO
how to deal with otitis externa with epithelial hyperplasia
an otoscopy wont pass
can eliminate the coliflower
doing a culture is pointless because u can hav many bacteria there
discuss sx procedure for total ear canal ablation with lateral bulla osteotomy
- begin with vertical ear canal resection
- continue by removing horizontal canal-use rongeurs to remove medial bony portion
discuss the procedure for lateral ear canal resection
pg 157 on text book
when is lateral ear canal indicated vs vertical
- in patients with minimal hyperplasia of the ear canal epithelium or small neoplastic lesions of the lateral aspect of the vertical canal
- note that for the vertical ear canal its performed when the entire vertical canal is diseased but the horizontal canal is normal .it may be a tech. of choice if the vetical canal has neoplasia or animals witth chronic otitis externa
discuss the procedure for vertical ear canal ablation
page 159 textbook
when do u do total ear canal ablation
whn animal has chronic otitis externa in which appropriate medical management has failed
when there is severe calcification
or the epithelial hyperplasia extends beyond the pinna or vertical ear canal
it is performed in animals with failed vertical ear canal resection
when is lateral bulla osteotomy(LBO) performed
it is done to expose the tympanic cavity so that exudate and secretory epithelium can be removed which improves drainage
it should be performed with total canal ablation in animals with chronic otits externa and middle ear dz
hen doing the TECA- LBO what precauton should u take
identify the facial nn. and pass around the umblical tape and pull to the side so u dnt damage the facial nn.
scrap the osseus bulla towards yourself so u dnt damage the tiny ear bones that u need to keep while removing the pierce of the auditory canal.
flash and aspirate any content of the osseus bulla
n do u removes sutures after doing TECa/LBO
14 days
which needle should u use for cannula drainager drainage
reverse cutting needle
when should u remove canula in hematoma drainage
7-21 days
when using an s or eliptical incision to drain the hematoma,how should u suture the lesion
suture has to go parallel to the incision.if u go horizontal,u will occlude the blood vessesl
stagger the suture.the point is that u wanna get the skin to adhere to the cartilage of the pinna
discuss the consequences for failure to tx the aural hematoma or post management
will result in permanent deformity of the ear
coliflower
