Dropbox Old Exam Questions Flashcards
The activity of thiobarbiturates is increased by
o Metabolic acidosis (Also hypoalbuminemia)
o Metabolic alkalosis
o Hyperthermia
o Hypoglycemia
o Hyperproteinemia
Metabolic acidosis (Also hypoalbuminemia)
Atropine has what effect on heart rate and rhythm?
Increases HR by blocking muscarinic receptors
Decreases HR by stimulation of vagal nuclei in the medulla
Produces first and second degree block during the development of sinus tachycardia
Predisposes to ventricular arrhythmias by increasing myocardial oxygen consumption
All of the above
Increases HR by blocking muscarinic receptors
Oxygen passes through the anesthesia machine in the following order
o Flowmeter, vaporizer, breathing circuit, patient
o Vaporizer, flowmeter, patient, breathing circuit
o Breathing circuit, vaporizer, flowmeter, patient
o Flush valve, charcoal, pressure raising valve, patient
o Vaporizer, pressure reducing valve, breathing circuit, patient
Flowmeter, vaporizer, breathing circuit, patient
A common potentially dangerous side effect associated w/ rapid IV injection of a thiobarbiturate is
o Vomiting
o Hyperthermia
o Convulsions
o Apnea
o Hyperreflexia
Apnea
The depth of anesthesia produced by an inhalant agent depends on
o The solubility of the anesthetic agent in the blood
o The partial pressure of the anesthetic agent in the brain
o The respiratory minute volume
o The duration of anesthesia
o The vapor pressure of the anesthetic
The partial pressure of the anesthetic agent in the brain
With the alveolar ventilation held constant, an increase in CO will increase anesthetic uptake and
o This will speed the rise in alveolar concentration of methoxyflurane
o The rise in arterial concentration will also vary with the solubility, the least soluble rising more slowly
o An excited animal will exhibit a fast induction
o The effect on the arterial concentration is more pronounced with methoxyflurane than nitrous oxide
o The alveolar rate of rise will be unaffected
The rise in arterial concentration will also vary with the solubility, the least soluble rising more slowly
Diffusion of anesthetic gases from the alveoli into the blood depends on
o Partial pressure gradient
o Solubility of gas in the blood
o The PCV
o MAC of the agent
o pH of the blood
Solubility of gas in the blood
A 2.5% solution of Thiopental contains what concentration of the actual drug?
o 2.5 mg/mL
o 0.025 mg/mL
o 25 mg/mL
o 250 mg/mL
o 2.5 mg/mL
25 mg/mL
Morphine, if administered intravenously, may potentiate a hypotensive crisis by causing
o The release of histamine
o The release of epinephrine
o Increasing vagal activity
o Increasing inotropy
o A and C are correct
The release of histamine
The anesthetic with the least cardiovascular effects in the dog is
o Thiopental
o Propofol
o Etomidate
o Halothane
o Methohexital
Etomidate
A 35 kg dog has been induced w/ Thiopental, intubated, and induction is continued w/ 2.5% isoflurane delivered and 2L/min of oxygen. The patient is spontaneously breathing, but moving, chewing the ET tube, and raising its head from the table. You mumble some obscene words and again inject 125 mg of Thiopental. Apnea follows, and you must now assist breathe for the animal. Which of the following would you expect to be the most serious consequence of this action?
o Arterial hypertension
o Tachycardia
o Decreased cardiac output
o Peripheral vasoconstriction
o Increased stroke volume
Decreased cardiac output
Xylazine offers an advantage over Acepromazine in that it is generally associated with a short period of
o Antihistamine effect
o Antiemesis
o Analgesia
o Sleep
o Antiarrhythmic effects
Analgesia
Opioids can produce which of the following in dogs?
Euphoria
Panting
Vomiting
Analgesia
All
All
Which anesthetic agent produces poor muscle relaxation, salivation, tonic clonic spasms, wide pupils when administered to cats?
o Ketamine
o Thiopental
o Etomidate
o Methohexital
o Halothane
Ketamine
Which inhalation anesthetic agent has the least effect on cardiac output?
o Halothane
o Methoxyflurane
o Enflurane
o Isoflurane
Isoflurane
MAC is
o The lowest alveolar concentration reflected in physiologic responses
o The end‐expired concentration of an anesthetic agent necessary to produce a response to a standard surgical stimulus
o The alveolar concentration below which subject awareness has been reported
o The lowest concentration of an anesthetic in the alveoli during the respiratory cycle
o The end‐expired concentration of an anesthetic which prevents response to a standard surgical stimulus in 50% of the subjects
The end‐expired concentration of an anesthetic which prevents response to a standard surgical stimulus in 50% of the subjects
