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Veterinary Anesthesia Flashcards

7 cards from real VTNE practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Veterinary Anesthesia flashcards as text

  1. Which breathing system is MOST appropriate for patients weighing less than 7 kg due to its low resistance and minimal rebreathing?

    Answer: Mapleson F (Norman Elbow) system

    The Mapleson F system (Norman Elbow/Bain modification) is preferred for small patients because it offers low resistance and reduces rebreathing without requiring a CO2 absorber.

  2. A dog under inhalant anesthesia shows a sudden decrease in end-tidal CO2 from 45 mmHg to 15 mmHg. What is the MOST likely cause?

    Answer: Pulmonary thromboembolism or cardiac arrest

    A sudden dramatic drop in EtCO2 is a classic sign of pulmonary thromboembolism or cardiac arrest, where CO2 delivery to the lungs ceases.

  3. What is the primary mechanism of action of acepromazine as a preanesthetic?

    Answer: Dopamine receptor antagonism

    Acepromazine is a phenothiazine tranquilizer that works primarily by blocking dopamine receptors in the CNS, producing sedation and reducing anxiety.

  4. During anesthesia, a cat's respiratory rate drops to 4 breaths per minute. Which intervention is MOST appropriate?

    Answer: Assist or control ventilation manually

    Severe hypoventilation requires immediate ventilatory support via manual or mechanical ventilation to prevent hypercapnia and hypoxemia.

  5. Which of the following is the CORRECT placement site for a pulse oximeter probe in an anesthetized dog?

    Answer: Lingual (tongue) mucosa

    The tongue is one of the most reliable sites for pulse oximetry in dogs because of good tissue perfusion and minimal pigmentation interference.

  6. What does a 'pop-off' (pressure relief) valve set to 2 cm H2O on an anesthesia machine primarily prevent?

    Answer: Barotrauma from excessive airway pressure

    The pop-off valve vents excess gas to prevent dangerous airway pressure buildup that could cause pulmonary barotrauma.

  7. Which local anesthetic has the LONGEST duration of action and is commonly used for epidural analgesia in veterinary patients?

    Answer: Bupivacaine

    Bupivacaine has the longest duration of action (4–8 hours) among commonly used veterinary local anesthetics and is preferred for epidural analgesia.