VTNE Anesthesia Final – Flashcards
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Xylazine is best described as
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Analgesic and sedative
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Detomidine is approved for use in ____.
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Horses
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Butorphanol is best described as a
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Analgesic
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________ is considered to be a good choice for patients when cardiovascular is compromised.
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Diazepam
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In the United States Xylazine is not approved for use in ____.
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Cattle
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Guaifenesin is most often used in horses and cattle to provide _____.
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Muscle relaxation
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The combination of xylazine and butorphanol is used to
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Provide greater analgesia and muscle relaxation than either drug can alone
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_______ is a potent sedative.
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Detomidine
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What drug is most likely to cause hypotension in normal doses?
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Acepromazine
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The combination drug Telazol contains
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Zolazepam and tiletamine
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Epidural techniques are used in many species, but the primary disadvantage in animals is?
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Movement of the patient
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_____ inhalant anesthetic drug is most likely to cause cardiac arrhythmia's in dogs.
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Halothane
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T/F: Nitrous oxide is a inhalant anesthetic that is biotransformed to the greatest extent in the body.
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Nitrous oxide * Is a inhalant analgesic not an anesthetic*
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Do Neuromuscular blocking agents cross the placental barrier in significant amounts?
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NO
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Is *propofol* classified as a barbiturate ?
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NO (lipid soluble hypnotic agent for short term procedures) *Phenobarbital, Thiopental, and Pentobarbital are Barbituates*
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Glycopyrrolate is a anticholinergic with what advatages over Atropine?
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*Glyco has:* *Longer* duration of *action* *Less* likely to cause *cardiac arrhythmia* *Smaller dose Volumes*
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Is Glyco able to cross the placental barrier?
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NO!
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At normal doses atropine prevents a ______ effect on the heart rate.
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Prevents a decrease
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Opiod drugs are uses in anesthetic protocols primarily as a
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Analgesic
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The advantage of xylazine over acepromazine is that it
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Xylazine Produces a short period of analgesia *Ace has no a analgesia effects!*
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Routine use of atropine should be avoided in horses because it may cause _____.
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Colic
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_____ should be avoided in the stallion because it may cause permanent prolapse of the penis.
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Acepromazine
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What drug is a narcotic antagonist?
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Naloxone
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A 10% solution of thiopental sodium for anesthetic induction contains
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100mg/ml
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Depressant pre anesthetics medications may _____ recovery time.
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Prolong
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______ is an antagonist of xylazine.
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Yohimbine
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Diazepam produces ________.
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Muscle relaxation
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Epinephrine ____ the heart rate.
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Increases
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Nitrous oxide _____ the amount of inhalation anesthetic required.
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Decreases
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A disadvantage of breathing 50% nitrous oxide is that it
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*decreases* the arterial PaO2
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How many mg/ml does a 2% lidocaine solution contain?
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20
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What volume of thiopental sodium should be used IV to a 500 kg horsefor induction of anesthesia. The dosage is 8mg/kg and you are using a 10% solution.
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40 ml
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What drug produces *apneustic* breathing pattern?
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Ketamine
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True/false: It is a good reason to use a preanesthetic to increase vagal activity
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False *Preanesthtics decrease undesirable effects*
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When lidocaine is used as a epidural agent in a dog it is ?
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A *excellent* caudal analgesic
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Mask induction are more appropriately used in ____ dogs.
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Calm
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Excessive salvation is not associated with ______.
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*ketamine* decreases salvation*
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Halothane concentrations of 1% to 2% * will not* produce a ____ in cardiac output.
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Increased cardiac output
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The adverse effects of anesthetics compounds are ____ dependent.
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Dose
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The most reliable sign of inadequate anesthesia depth is the response to _____.
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Movement
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Propofol is a?
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Nonbarbiturate, IV anesthetic with hypotensive potential.
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Ace should be avoided in patients with a history of _______.
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Seizures * older dogs also tolerate ace very well *
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In dogs, normal doses of opioids will not produce ____.
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Excitement
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When comparing inhalations anesthetics you should use the MAC as a guide in assessing ?
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Potency of the agent
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What drug is a dissociative anesthetic?
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Ketamine
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______ inhalant anesthetic has the longest induction and recovery time.
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Halothane
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Precision vaporizers as those used for isoflurane, work correctly when place
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out of the circle
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If the unidirectional valves are missing from a anesthetic machine you should?
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Definitely not okay to use the machine, except with a nonbreathing circuit
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The oxygen flush valve allows oxygen to flow into the breathing system without going through the _______.
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Vaporizer
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All inhalant anesthetic machines should have
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A anesthetic waste gas scavenging system
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Vaporizers will not be classified by
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type of breathing circuit with which they can be used.
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A intravenous catheter should be _____ enough to allow adequate fluid delivery, if cardiac arrest occurs.
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Large
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The volume of the rebreathing bag on an anesthetic machine should be at least _____ times the patients tidal volume.
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3
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Nitrous Oxide containers are painted _____.
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Blue
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ACtivated charcoal will absorb *all* anesthetic inhalants except?
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Nitrous oxide
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What condition is not associated with chronic exposure to inhalant anesthetic gases?
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Insomnia
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Will *chamber and mask inductions* reduce waste gas levels?
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NO
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When inflating the cuff on the endotracheal tube you should change to a larger diameter tube if the cuff inflation requires more the _____ ml of air.
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5
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Ideally the endotracheal tube should be inserted so that
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the tip is midway between the thoracic inlet and the larynx.
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True/False: A endotracheal tube increases dead space and allows for more efficient ventilation.
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False E-tube Decrease dead space
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_______ cat is most likely to experience layngospasm during endotracheal induction
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Persian
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What is the most common complication of endotracheal incubation
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Placement of the tube in the esophagus
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The best method for determining the proper inflation of a endotracheal tube is
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Inject air while applying pressure from teh reservoir bag until no air escapes around the tube
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The preferred method for treating a cat with larynogospasm is to place a drop of ____ ____ in the laryngeal area.
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Topical anesthetic
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What is not a advantage of using a E-tube
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*increases the chances of airway obstruction*
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In a siamese cat the E-tubeshould be removed when the animal begins to ______ and _____.
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Swallow and Cough
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In a pug the E-tube should be removed after the animal is ____ and able to maintain free airway.
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*Fully* Conscious
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Concerning use of IV anesthesia in large animal * Does Iv work well on procedures that require complete immobilization of the patient*
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No that is the least accurate statement!
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When monitoring the vital signs of an anesthetized patient you *do not have to record* _______.
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*reflexes*
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The responsibilities of the anesthetist during surgery includes monitoring/recording the patients vital sign every _____ min.
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5 min intervals
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Adequate oxygen may be evaluated subjectively during anesthesia by _____ and _____.
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Mucous membrane color and Capillary refill time
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Hypoventilation that occurs in the anesthetized patient is characterized by _______ oxygen levels and ____ carbon dioxide levels.
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decreased oxygen Increased carbon dioxide
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Once extubated all animals should be placed in what position?
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Sternal recumbency with neck extended
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Following discontinuation of the anesthetic gas, periodic bagging of the patient with pure oxygen is advisable because it
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Helps reinflate collapsed alveoli
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In a anesthetized patient pale mucous membrans can indicate
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Inadequate oxygen levels Excessive blood loos Decreased tissue perfusion *Not cyanosis*
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In a brachycephalic breed it is recommended to wait a longer period before extubation because of the likelihood of _____ and _____.
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Vomiting and airway obstruction
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T/F: Providing fresh food and water once the animal is conscious is advisable for a patient immediately following surgery
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False it is not recommended
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The minimum acceptable heat rate for an anesthetized medium sized dog is
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60 bpm
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It the heart rate falls below ____ it is cause for concern.
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100 bpm
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A anesthetist should be aware of the effects of anesthetic agents on the patient. When used as a *preanesthetic* atropine, and ace can cause
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Prolapse of the nitctitating membrane Reduced salvation and tear production Pupil dilation in cats *Will not cause respiratory depression*
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A capillary refill time that is over 2 seconds indicates
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Decreased peripheral blood perfusion
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Use of an indwelling catheter in an artery to monitor blood pressure is called
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Direct monitoring
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When monitoring the mucous membrane color of an anesthetized patient with pigmented gingival you could use each of the following altenative sites
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Tongue Buccal mucous membrane Membranes linning the prepuce or vulva *not the pinna*
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During the maintance period of anesthesia in a cat or dog, respiratory rates lower than ____/min may indicate excessive anesthetic depth that should be reported to the veterinarian.
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8 breaths per min
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Some anesthetists routinely bag the patient under anesthesia once every 5 min to help prevent ____.
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Atelectasis
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Is progression from light to moderate anesthesia a cause of true hyperventilation?
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No! Response to metabolic acidosis, response to a mild surgical stimulus, and presence of pulmonary edema is a cause of true hyperventilation.
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If the rectum of a patient is covered or inaccessible a rough body temperature may be obtained by____ or___.
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Touching the patients feet or ears
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Malignant hyperthermia is a potentially fatal syndrome. The _____ species is most prone to.
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Pig
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Use of succinylcholine in combination with general anesthesia is of a advantage to the anesthetist. The ____ muscle tone is of no use in monitoring patients given succinycholine.
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Jaw muscle tone
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Ketamine as a anesthetic agent diminishes the values of _____.
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Eye position
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In a animal that has *not* received an anticholinergic will the tear and saliva production diminish as anesthetic depth is increased?
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False a animal in a light plane may be indicated by increasing lacrimnation and salvation
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Stage ___may be characterized by vocalization, struggling, and breath holding.
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Stage II
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A dog received intramuscularly the correct dose of xylazine. Second degree heart block and bradycardia developed. Based on the most common cause of this adverse reaction, what would be the best therapy
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Glycopyrrolate
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Cardiac arrthymias that occur during anesthesia are not associated with _____.
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Normocapnia
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The most common arrhythmia associated with use of _______ in dogs during induction of anesthesia is______.
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Thiobarbiturates, Bigeminy
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Tachycardia in an anesthetized patient will not be a indication of _______.
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Xylazine overdose
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Hypothermia has became significant in a 4-kg cat. What is the best way to restore body heat?
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To warm the air in the breathing circuit by some method.
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An isoflurane cat suddenly begins breathing 30 times a minute during surgical procedure. You first response should be to ?
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Turn down the oxygen flow rate
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If a dog is to deeply anesthetized you will *not* see _______ jaw muscle tone.
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Increased
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A dog anesthetized with halothane in 99% oxygen developes ventricular tachycardia. ________ is the drug of choice for therapy.
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Lidocaine
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Dubutamine is used in emergency and clinical situations to ______ cardiac output
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Increase
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Patients that have had water withheld for long periods before surgery and general anesthesia may be prone to?
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Dehydration and hypotension
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When xylazine is used to induce vomiting before surgery make sure to?
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Examine the airway for gastric contents before placing the E-tube
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Immediately after tracheal intubation in a 3-kg cat you notice extreme respiratory distress. ________ intubation is most likely the cause.
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Bronchial
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After placing, lubricating and inflating the cuff you note a sudden decrease in heart rate.What is most likely the cause?
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The cuff is overinflated producing vagal induced bradycardia
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During CPR 2% lidocaine is used to treat ventricular arrhythmias. ________ is a complication that may occur after intravenous infusion of lidocaine.
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Bradycardia
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Sodium bicarbonate is used to ?
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combat acidosis
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Doxapram will not produce _____.
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Hypoventilation
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Thiopental may be delayed by _____ because of its high lipid solubility.
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Obesity
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_____ is commonly used along with ketamine or thiopental as a induction agent for adult horses.
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Guaifensin
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______ can cause convulsions when administered alone at high doses.
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Dissociative anesthetics
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______ is a analgesic and a sedative.
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Xylazine *Alpha 2 Agonist*
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Midazolam will/won't predispose he animal to bloat?
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Will not! Atropine, Medetomidine, and glyco will predispose a animal to bloat
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A drug considered an ____ if its action at the receptor is to stimulate.
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Agonist
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Anticholinergics drugs prevent _____.
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Bradycardia (anticholinergics block the parasympathetic response)
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Telezol is given __.
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IM
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NO more than _____ nitrous oxide should be delivered.
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70%
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Nitrous oxide can never be used in a ____ circuit.
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Closed
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Diffusion hypoxia is of concern when recovering a patient if ______ was given.
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Nitrous oxide
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Recovery from a barbiturate anesthesia is *not* prolonged by _________.
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Elevated cardiac output
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______ may occur because rapid recovery from isoflurane anesthesia.
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Emergence delirium
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If a patient has a intestinal obstruction _______ should not be used
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Nitrous oxide
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T/F: Hyperthermia will cause pale mucouse membranes.
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False *hyperthermia does NOT cause hyperthermia*
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T/F:Neuromuscular blocking agents must be injected around the nerve.
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False *local anesthetics are injected around the nerve not neuromuscular agents*
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When giving a neuromuscular blocking agent the last muscle to become paralyzed is?
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Diaphragm
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Where do neuromuscular agents disrupt nerve impulses?
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Along the nerve fiber
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Local anesthetics interfere with the transmission of the impulse along the ______.
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Nerve Fiber
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Inhalant anesthtics with low ____ have short induction and recovery periods.
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Solubility coefficient
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Precision vaporizers are best suited for?
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Highly volatile anesthetics
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Neuromuscular agents do/dont cross the placenta barrier
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do not
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What are neuromuscular blocking agents also known as?
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Peripheral muscle relaxants
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Neuromuscular agents are not used for _______.
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analgesia
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Acetycholinestrase inhibitors
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are reversal agents for non depolarizing neuromuscular blockers
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What do local anesthetics prevent?
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They prevent nerve cell depolarization
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If a patient is dyspneic *Do Not* ______the pet from the anesthesia machine.
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Dissconnect
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What is a way to reduce/minimize exposure to waste anesthetic gas
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Properly inflate the E-tube cuff
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A epidural agent is administered?
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Between L7 and the sacrum
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Would a epidural be appropriately used for a eye enucleation?
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NO
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Pervascular injection of a barbiturate (Thiopental) may cause?
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Tissue slough
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Methohexital (a barbituate ) can be used in sight hounds to produce?
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Faster anesthetic recovery
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What is a Cyclohexamine ( ketamine, Ace, Xylazine, Propofol)
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*Ketamine* is a cyclhexamine
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Ace is classified as a?
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Phenothiazine
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BAA contains?
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Butorphanol, ace, atropine
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What drug is an antagonist of medetomidine?
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Atipamezole
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Naloxone is classified as
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Antagonist
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Succinylcholine is classified as a
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neuromuscular blocking agent
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Sevoflurane has the Highest/lowest blood gas coefficient
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LOWEST
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T/F;; Severe heart depression is a trait of sevoflurane.
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False *Sevo has a slight depression effect on the heart, unlike halothane which has severe depression effect.
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What is not a controlled substance *Ace, Ketamine, Diazapam*
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Acepromazine
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The drug that has the longest duration of effect after one injection
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Buprenorphine
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What local anesthetic has the longest duration of action?
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Bupivacaine
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Xylazine is a _________ that provides sedation, muscle relaxation, and analgesia.
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Alpha 2 agonist
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What measures expired CO2
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Capnograph
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Gas cylinders that are part of the anesthetic machine are attached to it by a
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Yoke
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Medical oxygen machines are ______.
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Green
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High pressure system tests the anesthetic machine for?
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Oxygen or nitrous oxide leaks
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For a given inhalation anesthetic agent a vaporizer setting of ____ times MAC will produce a surgical depth of anesthesia.
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1.5
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When using a mechanical ventilator the animals chest is under
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positive pressure
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The laryngoscope facilitates ______.
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intubation
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An anesthetized patient should receive sigh breaths every ______ min
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5-10 min
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Before adminstering general anesthesia what is least important in a animals history
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when the animal was last vaccinated
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With dogs and cats food is most commonly withheld for?
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10-12 hours
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what stimuli can activate sympathetic portion of the autonomic nervous system
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painful stimuli
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Anticholinergics increase/decrease intestinal peristalsis
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Decrease
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What is not an opioid drug?
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Diazepam
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T/F: Diazepam is a potent sedative
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False *diazepam is a weak sedative*
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Ketamine is most likely to cause_______ after administration
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hypotension
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What is not seen when ketamine is administered IV rather than IM?
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Longer duration of effects
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Why is apnea sometimes prolonged after barbiturates are administered to rapidly?
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Barbiturates surpress the respiratory center making it less sensitive to carbon dioxide
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What is not a characteristic of propofal
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Good post anesthesia analgesia
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What is not a characteristic of ketamine
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tachypnea
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What is least likely to be a result of administering barbiturates perivasularly
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Transient apnea
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When are barbiturates most potent
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in their unbound form*use caution in hypoproteinemic animals*
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Administering short acting barbiturates drugs can be safety administered by ____ to induce general anesthesia.
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IV
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A adavantage of inhalants over injectables is *not*
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Less expensive
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When giving barbiturates IV give
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1/2 of the dose quickly then the rest to effect
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Mask induction is best accomplished by?
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Using a volatile anesthetic that is relatively insoluble in body fluids, such as isoflurane
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Postanesthetic myositis is most likely to occur in
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Horses
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Atropine should be avoided in _____.
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Horses
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What is not a potential odic effect of commonly used local anesthetics?
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Acidosis
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Balanced anesthesia does *not* commonly include
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Disoociative agents
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Nitrous oxide is associated with?
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diffusion hypoxia
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*Thymol* is a preservative in ______.
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Halothane
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WHat is not commonly seen in stage IV of G.A
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Constricted pupils
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What reflex may be present under a light surgical plane
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Palpebral
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The optimal stage for general anesthsia is
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Stage 3 plane 2
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What is not a true reflex
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jaw tone
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What is a helpful drug in treating prolonged anesthetic recoveries?
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Doxapram
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Can halothane, Isoflurane, Sevoflurane be safely used in a non precession vaporizer?
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NO *none of the above* :)
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__________ can not be compensated by a vaporizer.
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Solubility coeffcient
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What is the prefered order of administering emergency drugs?
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IV, IT, IC
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What has been associated with long term exposure to waste anesthetic gases?
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Hepatotoxicty Decline in short term memory Increased incidence of miscarriages
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_________ is a nonreversable type of muscle paralyzing agency
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Succinylcholine
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What agent is excreted largely intact cat kidneys
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Ketamine
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Mask induction should be avoided with ___________.
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impaired respiratory function