VP Timed Qs_09/03 Flashcards
6-yr old Cocker Spaniel w/ chronic hx of ear infxns; presents w/ circling to the left w/ a L head tilt, and both rotary & horizontal nystagmus w/ fast phase to the R; no other neurologic deficits except for possible hearing deficit; difficult to perform otoscopic exam w/o sedation; dog has been on multiple topical and systemic meds to tx otitis over the past few weeks. What drug is commonly implicated cause of peripheral vestibular dz?
Chlorhexidine –> topical, implicated in ototoxicity & peripheral vestibular dz; also aminoglycosides (neomycin, kanamycin, tobramycin, amikacin, gentamicin)
Metronidazole –> cause of central vestibular dz
10-yr old MN DSH cat w/ 6-wk hx of pacing and circling to the L at home; constantly paces but no detectable ataxia or weakness; absent head tilt; where is the lesion?
Left forebrain –> pacing most commonly occurs w/ dysfxn of the forebrain (prosencephalon)
Circling –> can be either forebrain or vestibular (both peri & central) toward the side of the lesion; vestibular is less likely b/c no ataxia, weakness, or head tilt
8 yr old QH brood mare w/ acute colic; HR 58 RR 28 seen rolling on the ground, CRT ~3.0secs MM slightly red; T 101.6F (38.7C) GI sounds absent and gastric reflux yielded 15L of brown to yellow colored fluid. Peritoneal fluid analysis yielded a cloudy yellow fluid w/ protein of 2.8gm/dL and WBC of 11,354/mcL. What is NOT likely a dx?
Strangulating lipoma –> often seen in older horses, this horse is relatively young
Other conditions w/ same Cx: mesenteric rent, small intestinal volvulus, epiploic foramen entrapment
Mechanism of action of albuterol (commonly used in the tx of cough in cats)
Beta-2- agonist –> relaxation of bronchial, uterine, and vascular smooth muscle
