VTNE Veterinary Anesthesia 2

Question 1

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

Accepted Answer

Mapleson F (Norman Elbow) system

Answer

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.

Question 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?

Accepted Answer

Pulmonary thromboembolism or cardiac arrest

Answer

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

Question 3

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

Accepted Answer

Dopamine receptor antagonism

Answer

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

Question 4

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

Accepted Answer

Assist or control ventilation manually

Answer

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

Question 5

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

Accepted Answer

Lingual (tongue) mucosa

Answer

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

VTNE - Veterinary Technician National Examination Practice Test

VTNE - Veterinary Technician National Examination Practice Test

VTNE Veterinary Anesthesia 2