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Question 1Veterinary Nursing and Patient Care

A veterinary technician is preparing to obtain a blood sample from the cephalic vein of a medium-sized dog. Which restraint position is most appropriate for this venipuncture site?

  1. Sternal recumbency with the front leg extended toward the technician
  2. Lateral recumbency with the rear leg pulled caudally
  3. Standing restraint with the head elevated and the front leg held off the table Correct answer.
  4. Dorsal recumbency with all four limbs secured

Explanation

The cephalic vein runs along the cranial aspect of the forelimb, so the patient is usually restrained standing or in sternal recumbency with the front leg held off the table edge and the holder occluding the vein above the elbow. This position keeps the limb stable and allows the technician to visualize the vessel. Lateral recumbency with rear-leg extension is used for the lateral saphenous vein, not the cephalic.

Question 2Veterinary Nursing and Patient Care

When calculating a drug dose for a 12 kg dog, the veterinarian orders 5 mg/kg. The drug is supplied as a 20 mg/mL solution. How many milliliters should be administered?

  1. 3 mL Correct answer.
  2. 1.2 mL
  3. 6 mL
  4. 12 mL

Explanation

First multiply the dose by the body weight: 5 mg/kg × 12 kg = 60 mg. Then divide by the concentration: 60 mg ÷ 20 mg/mL = 3 mL. Checking units confirms that milligrams cancel to leave milliliters, which is the volume to draw into the syringe.

Question 3Veterinary Nursing and Patient Care

Which parameter is most commonly used to assess the depth of anesthesia in a small animal patient during surgery?

  1. Body temperature
  2. Capillary refill time
  3. Palpebral and pedal reflexes Correct answer.
  4. Packed cell volume

Explanation

Reflexes such as the palpebral, pedal, and swallowing reflexes are the standard indicators of anesthetic depth because they diminish in a predictable sequence as anesthesia deepens. Monitoring these reflexes helps the technician avoid both inadequate anesthesia and excessive depth. Body temperature and capillary refill time reflect perfusion and thermal status rather than depth of anesthesia.

Question 4Veterinary Nursing and Patient Care

A client asks why their cat should be fasted before a scheduled ovariohysterectomy. What is the primary reason for preoperative fasting in this patient?

  1. To improve the surgical visibility of the ovaries
  2. To prevent postoperative diarrhea
  3. To lower the cost of the anesthetic drugs used
  4. To reduce the risk of aspiration of gastric contents during anesthesia Correct answer.

Explanation

Fasting reduces gastric volume, which lowers the risk of regurgitation and aspiration pneumonia while the patient is anesthetized and lacks protective airway reflexes. This is the principal rationale for withholding food before surgery. Fasting does not meaningfully reduce drug cost, improve ovarian visualization, or prevent postoperative diarrhea.

Question 5Veterinary Nursing and Patient Care

During a physical examination, the technician notes that a dog's mucous membranes are pale pink to white. Which underlying condition does this finding most likely suggest?

  1. Cyanosis from hypoxemia
  2. Carbon monoxide poisoning
  3. Hepatic jaundice
  4. Anemia or poor peripheral perfusion Correct answer.

Explanation

Pale or white mucous membranes indicate reduced hemoglobin or diminished peripheral blood flow, as seen with anemia, shock, or vasoconstriction. Cyanosis, by contrast, produces a blue-gray tint from deoxygenated hemoglobin. Jaundice produces yellow discoloration, which is a different finding entirely.

Question 6Veterinary Nursing and Patient Care

Which route of drug administration is most appropriate when a technician needs to deliver a rapidly acting emergency drug to a collapsed patient with poor peripheral perfusion?

  1. Subcutaneous
  2. Intravenous Correct answer.
  3. Intramuscular
  4. Oral

Explanation

The intravenous route delivers drug directly into the circulation and produces the fastest onset, which is essential in an emergency when peripheral perfusion is poor. Subcutaneous and intramuscular routes depend on absorption and are unreliable in a collapsed, vasoconstricted patient. Oral administration is slow and unsuitable for a patient unable to swallow safely.

Question 7Veterinary Nursing and Patient Care

What is the normal resting heart rate range for an adult cat?

  1. 60 to 120 beats per minute
  2. 40 to 60 beats per minute
  3. 140 to 220 beats per minute Correct answer.
  4. 220 to 300 beats per minute

Explanation

An adult cat typically has a resting heart rate of roughly 140 to 220 beats per minute, which is faster than the typical canine range. Recognizing the species-specific normal helps the technician distinguish bradycardia or tachycardia from an appropriate rate. Values outside this range warrant correlation with the patient's clinical status.

Question 8Veterinary Nursing and Patient Care

When placing a bandage on a distal limb, why is it important to include the toes in the bandage and check them frequently?

  1. To keep the paw warm during recovery
  2. To prevent the patient from chewing the bandage
  3. To allow assessment of distal perfusion and detect swelling Correct answer.
  4. To improve the cosmetic appearance of the limb

Explanation

Leaving the toes exposed allows the technician and client to monitor for swelling, coolness, or color change that would signal compromised circulation from a bandage applied too tightly. Early detection prevents serious tissue damage. Including the toes is not primarily about warmth, chewing prevention, or appearance.

Question 9Veterinary Nursing and Patient Care

A technician is preparing to administer a medication via the subcutaneous route. Which technique describes correct placement of the needle?

  1. Insert the needle at a 90-degree angle into the muscle belly
  2. Insert the needle at a shallow angle into the dermis only
  3. Lift the skin to form a tent and insert the needle into the space beneath it Correct answer.
  4. Insert the needle into a vein and aspirate for blood

Explanation

For subcutaneous injection, the skin is lifted into a tent and the needle is inserted into the loose connective tissue beneath it, which avoids underlying muscle and vessels. This technique is standard for vaccines and many fluid boluses. A 90-degree insertion into muscle describes an intramuscular injection.

Question 10Veterinary Nursing and Patient Care

During anesthesia monitoring, the technician observes that the patient's respiratory rate has dropped to 4 breaths per minute with shallow excursions. What is the most appropriate immediate action?

  1. Alert the veterinarian and provide manual ventilation support Correct answer.
  2. Increase the anesthetic vaporizer setting
  3. Continue monitoring and reassess in 15 minutes
  4. Document the finding and adjust the fluid rate

Explanation

Marked bradypnea with shallow breathing indicates inadequate ventilation and impending hypoxemia, so the veterinarian should be alerted immediately and manual or assisted ventilation initiated. Increasing anesthetic depth would worsen respiratory depression. Passive monitoring or fluid adjustments do not address the ventilatory emergency.

Question 11Veterinary Nursing and Patient Care

A dog is admitted with a suspected urinary tract obstruction and the veterinarian requests a cystocentesis. Which consideration is most important before performing this procedure?

  1. Withholding all fluids for 24 hours
  2. Administering an enema to clear the colon
  3. Ensuring the patient has been fasted for 12 hours
  4. Confirming the bladder is sufficiently distended and palpable Correct answer.

Explanation

Cystocentesis requires a distended, palpable bladder so the needle can be guided into it safely; a small or empty bladder increases the risk of puncturing adjacent organs. Fasting, enemas, and fluid restriction are not prerequisites for this procedure. Ultrasound guidance may be used when palpation is insufficient.

Question 12Veterinary Nursing and Patient Care

A technician is calculating a fluid deficit for a dehydrated dog. Which formula correctly estimates the fluid deficit in milliliters?

  1. Body weight in kg ÷ percent dehydration × 100
  2. Body weight in kg × percent dehydration ÷ 10
  3. Body weight in kg × percent dehydration × 1000 Correct answer.
  4. Body weight in kg × percent dehydration × 10

Explanation

The fluid deficit in milliliters equals body weight in kilograms × percent dehydration (expressed as a decimal) × 1000, because one kilogram of water equals roughly one liter. For example, a 10 kg dog that is 5% dehydrated has a deficit of 10 × 0.05 × 1000 = 500 mL. This formula is the standard basis for calculating replacement fluids.

Question 13Veterinary Nursing and Patient Care

A cat is presented with a history of straining to urinate and only small drops of urine being produced. Which condition should the technician prioritize communicating to the veterinarian?

  1. Simple constipation
  2. Urethral obstruction Correct answer.
  3. Otitis externa
  4. Chronic vomiting

Explanation

Straining with only small amounts of urine in a male cat strongly suggests urethral obstruction, a life-threatening emergency that can cause hyperkalemia and bladder rupture. Prompt recognition allows immediate intervention. Constipation, vomiting, and ear disease do not match this presentation.

Question 14Veterinary Nursing and Patient Care

When collecting a urine sample for culture, which method is preferred to minimize contamination from the lower urinary tract and external genitalia?

  1. Collection from a soiled cage floor
  2. Cystocentesis Correct answer.
  3. Manual expression of the bladder
  4. Free-catch midstream collection

Explanation

Cystocentesis collects urine directly from the bladder, bypassing the distal urethra and external genitalia, so it is the preferred method for culture. Free-catch and expressed samples are more likely to be contaminated with environmental or distal tract bacteria. Samples collected from surfaces are unsuitable for culture.

Question 15Veterinary Nursing and Patient Care

A technician is preparing to place an intravenous catheter in a dog's cephalic vein. Which step is most important to reduce the risk of phlebitis and infection?

  1. Applying a loose bandage over the catheter
  2. Clipping and aseptically preparing the insertion site Correct answer.
  3. Flushing the catheter with heparinized saline every hour
  4. Selecting the largest catheter available

Explanation

Aseptic preparation of the insertion site, including clipping and scrubbing with an appropriate antiseptic, is the single most important step in reducing catheter-related infection and phlebitis. Bandaging, catheter size, and flushing frequency do not substitute for proper site preparation. Sterile technique throughout placement further supports this goal.

Question 16Veterinary Nursing and Patient Care

A client asks how to administer ear medication to their dog at home. Which instruction should the technician provide?

  1. Insert the applicator tip deep into the ear canal to ensure delivery
  2. Apply the medication only to the outer ear flap
  3. Massage the base of the ear after instilling the medication Correct answer.
  4. Flush the ear with water before each dose

Explanation

After instilling the prescribed medication into the ear canal, gently massaging the base of the ear helps distribute the drug throughout the canal. The applicator tip should not be inserted deeply, as this can traumatize the canal or eardrum. Water flushing and applying medication only to the flap do not deliver the drug where it is needed.

Question 17Veterinary Nursing and Patient Care

During a routine wellness examination, a technician notes a body condition score of 8 out of 9 on a dog. What is the most appropriate interpretation of this score?

  1. The score indicates severe dehydration
  2. The dog is at an ideal weight
  3. The dog is significantly underweight
  4. The dog is markedly obese Correct answer.

Explanation

On the 1-to-9 body condition scale, a score of 8 indicates obesity, with excess fat covering the ribs and a lack of a visible waist. Scores of 4 to 5 are considered ideal, and lower scores indicate underweight animals. Body condition scoring reflects body fat, not hydration status.

Question 18Veterinary Nursing and Patient Care

Which finding on a patient's mucous membranes would most strongly suggest cyanosis and warrant immediate oxygen supplementation?

  1. Yellow-tinged membranes
  2. Bright red membranes
  3. Blue-gray membranes Correct answer.
  4. Pale white membranes

Explanation

Cyanosis appears as a blue-gray discoloration of the mucous membranes and reflects inadequate oxygenation of the blood, requiring prompt oxygen therapy and veterinary assessment. Bright red membranes suggest hyperemia or carbon monoxide exposure, yellow suggests jaundice, and pale white suggests anemia or poor perfusion. Each color points to a different underlying problem.

Question 19Veterinary Nursing and Patient Care

A technician is asked to calculate the maintenance fluid rate for a 20 kg dog using the standard rate of 60 mL/kg/day. What is the daily volume?

  1. 1200 mL/day Correct answer.
  2. 300 mL/day
  3. 2400 mL/day
  4. 600 mL/day

Explanation

Multiplying the maintenance rate by body weight gives 60 mL/kg/day × 20 kg = 1200 mL/day. This daily volume is then divided by 24 to determine the hourly pump rate. Accurate calculation prevents both underhydration and fluid overload.

Question 20Veterinary Nursing and Patient Care

A technician is monitoring a patient recovering from anesthesia and notes a temperature of 36.1°C (97°F). Which action is most appropriate?

  1. Remove all blankets to cool the patient
  2. Apply active warming measures and continue close monitoring Correct answer.
  3. Administer a diuretic
  4. Increase the anesthetic gas concentration

Explanation

A temperature of 36.1°C indicates hypothermia, a common post-anesthetic complication, so active warming with blankets, warm air devices, or warm fluids and continued monitoring are appropriate. Increasing anesthesia would worsen hypothermia, and cooling measures would be harmful. Diuretics do not address low body temperature.

Question 21Veterinary Nursing and Patient Care

Which client instruction is most important when dispensing oral antibiotics for a dog to treat a skin infection?

  1. Mix the medication into the dog's water bowl
  2. Complete the full prescribed course even if signs improve Correct answer.
  3. Double the dose if a dose is missed
  4. Discontinue the medication as soon as the skin looks better

Explanation

Completing the full prescribed course of antibiotics helps ensure the infection is fully cleared and reduces the development of resistant bacteria. Stopping early when signs improve can allow remaining organisms to survive and recur. Doubling doses or mixing medication into water can lead to inaccurate dosing.

Question 22Veterinary Nursing and Patient Care

A technician is preparing to perform a complete blood count and notes that the blood sample was collected in an EDTA tube but has been sitting at room temperature for several hours. Which effect is most likely?

  1. Artifactual changes in cell morphology and platelet clumping Correct answer.
  2. Increased accuracy of the platelet count
  3. No effect on the sample at all
  4. Improved red cell stability

Explanation

Prolonged storage of an EDTA sample at room temperature can cause cell swelling, morphologic changes, and platelet clumping, which may produce inaccurate results. Samples should be analyzed promptly or prepared as smears to preserve morphology. Storage does not improve accuracy or stability.

Question 23Veterinary Nursing and Patient Care

A dog is presented with a suspected gastric dilatation-volvulus. Which set of findings should prompt immediate veterinary intervention?

  1. Mild diarrhea and a normal abdomen
  2. Increased appetite and weight gain
  3. A distended abdomen, nonproductive retching, and restlessness Correct answer.
  4. Sneezing and clear nasal discharge

Explanation

Abdominal distension with nonproductive retching and restlessness is the classic presentation of gastric dilatation-volvulus, a surgical emergency that can rapidly lead to shock. Immediate stabilization and veterinary intervention are required. The other findings are unrelated to this condition.

Question 24Veterinary Nursing and Patient Care

A technician is assessing a patient's pain level after surgery. Which combination of findings most reliably indicates acute postoperative pain in a dog?

  1. Decreased heart rate and deep sleep
  2. Relaxed posture, normal appetite, and wagging tail
  3. Increased heart rate, tense abdomen, and reluctance to move Correct answer.
  4. Bright attitude and interest in toys

Explanation

Acute postoperative pain in dogs is often reflected by tachycardia, abdominal tension, reluctance to move, and altered behavior. These signs are used with pain scoring tools to guide analgesic decisions. Relaxed posture, normal appetite, and playful behavior suggest comfort rather than pain.

Question 25Veterinary Nursing and Patient Care

A patient receiving intravenous fluids develops increased respiratory effort, serous nasal discharge, and weight gain over several hours. Which complication should the technician suspect?

  1. Fluid overload Correct answer.
  2. Hypothermia
  3. Anemia
  4. Hypokalemia

Explanation

Increased respiratory effort, nasal discharge, and rapid weight gain during fluid therapy are classic signs of fluid overload and impending pulmonary edema, requiring the veterinarian to be notified and the rate adjusted. Hypokalemia, anemia, and hypothermia do not produce this combination of respiratory and weight changes.

Question 26Veterinary Nursing and Patient Care

A veterinary technician is preparing to perform a complete physical examination on a canine patient. Which sequence best follows the standard head-to-tail approach while minimizing patient stress?

  1. Start with the abdomen, then the thorax, head, limbs, and finish with the tail and perineum.
  2. Examine the limbs first, then the abdomen, thorax, head, and finally the tail and perineum.
  3. Begin with the tail and perineum, then examine the limbs, abdomen, thorax, and finish with the head.
  4. Start at the head, examine the eyes and ears, then move to the thorax, abdomen, and limbs, finishing with the tail and perineum. Correct answer.

Explanation

A systematic head-to-tail examination ensures all body regions are evaluated and reduces the chance of missing abnormalities. Starting at the head and proceeding caudally is the standard approach taught in veterinary nursing. This order also allows the technician to observe the patient's demeanor and respiratory pattern before handling sensitive areas.

Question 27Veterinary Nursing and Patient Care

During a wellness appointment, a technician calculates a dog's body condition score (BCS) as 7 out of 9. Which statement best interprets this score?

  1. The dog is mildly underweight but within normal limits.
  2. The dog is moderately overweight and would benefit from a weight management plan. Correct answer.
  3. The dog is at an ideal weight with well-proportioned body fat.
  4. The dog is severely underweight and requires nutritional support.

Explanation

A BCS of 7/9 indicates that the dog is above ideal condition, typically with excess fat cover over the ribs and spine. Ideal BCS is generally 4–5/9. A score of 7 suggests moderate overweight status, prompting a discussion about diet and exercise.

Question 28Veterinary Nursing and Patient Care

A technician is preparing to administer a subcutaneous injection to a dog. Which technique describes the correct placement?

  1. Lift a fold of skin over the shoulders or flank and insert the needle at a 30- to 45-degree angle into the tented area. Correct answer.
  2. Place the needle intradermally on the inner surface of the pinna.
  3. Insert the needle into the vein after occluding it with digital pressure.
  4. Insert the needle at a 90-degree angle into the muscle of the thigh.

Explanation

Subcutaneous injections are given by tenting the skin to create a space between the skin and underlying tissues, then inserting the needle at an angle into that space. Common sites include the scruff (interscapular area) and flank. This technique allows slow absorption of the medication.

Question 29Veterinary Nursing and Patient Care

When monitoring a patient under anesthesia, the technician notes a sudden drop in end-tidal CO2 from 45 mmHg to 20 mmHg. Which is the most likely cause?

  1. Hypothermia
  2. Decreased cardiac output or pulmonary embolism Correct answer.
  3. Increased metabolic rate
  4. Hyperventilation due to inadequate anesthesia depth

Explanation

End-tidal CO2 reflects pulmonary perfusion and ventilation. A sudden drop in ETCO2 often indicates decreased pulmonary blood flow, such as from hypotension, cardiac arrest, or pulmonary embolism. Hyperventilation would also lower CO2 but typically not as abruptly without other signs. Hypothermia and increased metabolic rate would not cause a sudden profound drop.

Question 30Veterinary Nursing and Patient Care

A technician is calculating the maintenance fluid rate for a 10 kg dog using the standard 60 mL/kg/day. What is the correct hourly rate?

  1. 150 mL/hr
  2. 25 mL/hr Correct answer.
  3. 50 mL/hr
  4. 100 mL/hr

Explanation

Maintenance fluid requirement is 60 mL/kg/day. For a 10 kg dog, that is 600 mL/day. Dividing by 24 hours gives 25 mL/hr. This rate is used for ongoing maintenance, not for replacing deficits.

Question 31Veterinary Nursing and Patient Care

A cat is presented with pale mucous membranes and a prolonged capillary refill time (CRT) of 3 seconds. Which parameter should the technician prioritize for immediate assessment?

  1. Body temperature
  2. Urine specific gravity
  3. Lung auscultation
  4. Blood pressure Correct answer.

Explanation

Pale mucous membranes and prolonged CRT suggest poor peripheral perfusion, often due to hypotension or shock. Blood pressure assessment is critical to confirm and guide treatment. Temperature, lung sounds, and urine specific gravity are important but secondary to immediate perfusion status.

Question 32Veterinary Nursing and Patient Care

A technician is preparing to collect a blood sample for a coagulation panel. Which tube should be used and how should it be handled?

  1. EDTA tube, filled to the indicated line and mixed gently.
  2. Sodium citrate tube, filled to the indicated line and mixed by inversion. Correct answer.
  3. Serum separator tube, filled and centrifuged immediately.
  4. Heparin tube, filled completely and placed on ice.

Explanation

Coagulation testing requires a sodium citrate tube (light blue top) that is filled to the correct volume to maintain the proper blood-to-anticoagulant ratio. The tube should be gently inverted to mix. EDTA and heparin interfere with coagulation assays, and serum tubes are not appropriate for coagulation studies.

Question 33Veterinary Nursing and Patient Care

A dog is recovering from anesthesia and the technician notes a temperature of 36.1°C (97°F). Which action is most appropriate?

  1. Administer a heating pad set to high heat directly on the skin.
  2. Increase the anesthetic gas concentration to stimulate metabolism.
  3. Apply active warming measures such as a forced-air blanket and warm IV fluids. Correct answer.
  4. Monitor and recheck temperature in one hour without intervention.

Explanation

A temperature of 36.1°C (97°F) indicates hypothermia, which can impair recovery and clotting. Active warming with safe devices like forced-air blankets and warmed IV fluids is indicated. Direct high heat can cause burns, and increasing anesthesia would worsen hypothermia.

Question 34Veterinary Nursing and Patient Care

A client is administering oral liquid medication to a cat at home. Which instruction should the technician provide to reduce the risk of aspiration?

  1. Hold the cat's head elevated and squirt the medication directly into the throat.
  2. Administer the medication rapidly into the back of the mouth to ensure swallowing.
  3. Mix the medication with a small amount of food and force the cat to eat it quickly.
  4. Place the syringe in the side of the mouth and administer slowly, allowing time to swallow. Correct answer.

Explanation

Administering oral liquids slowly into the side of the mouth (buccal pouch) allows the cat to swallow naturally and reduces the risk of aspiration. Rapid administration or direct squirting into the throat increases the chance of fluid entering the airway. Mixing with food is acceptable only if the cat voluntarily eats and the full dose is consumed.

Question 35Veterinary Nursing and Patient Care

A technician is assessing a patient for dehydration. Which combination of findings most reliably indicates mild dehydration (approximately 5%)?

  1. Slight loss of skin elasticity and tacky mucous membranes Correct answer.
  2. Normal skin turgor and moist mucous membranes
  3. Severe skin tenting, tachycardia, and cold extremities
  4. Sunken eyes, prolonged skin tent, and collapse

Explanation

Mild dehydration (about 5%) is characterized by slightly decreased skin elasticity and tacky mucous membranes. More severe dehydration (8–10%) presents with pronounced skin tenting, sunken eyes, and signs of shock. Normal turgor and moist membranes indicate adequate hydration.

Question 36Veterinary Nursing and Patient Care

A technician is preparing to place an indwelling urinary catheter in a male dog. Which step is most important to prevent contamination of the urinary tract?

  1. Use non-sterile gloves and lubricate the catheter with petroleum jelly.
  2. Flush the catheter with tap water before insertion.
  3. Use sterile gloves and sterile lubricant, and clean the prepuce with an antiseptic solution before insertion. Correct answer.
  4. Insert the catheter quickly without cleaning to minimize patient discomfort.

Explanation

Aseptic technique is essential when placing a urinary catheter to reduce the risk of introducing bacteria into the urinary tract. This includes cleaning the prepuce, wearing sterile gloves, and using sterile lubricant. Quick insertion without cleaning or using non-sterile supplies increases infection risk.

Question 37Veterinary Nursing and Patient Care

A dog is receiving a blood transfusion. The technician observes a sudden increase in heart rate and a drop in blood pressure. Which action should the technician take first?

  1. Stop the transfusion and notify the veterinarian immediately. Correct answer.
  2. Slow the transfusion rate and continue monitoring.
  3. Administer an antihistamine without veterinary authorization.
  4. Increase the transfusion rate to maintain blood pressure.

Explanation

Acute transfusion reactions can present with tachycardia, hypotension, and other signs. The first action is to stop the transfusion to prevent further reaction and alert the veterinarian. Slowing or continuing the transfusion risks worsening the reaction.

Question 38Veterinary Nursing and Patient Care

A technician is evaluating a dog with a suspected cranial cruciate ligament rupture. Which finding is most consistent with this injury?

  1. Increased muscle mass on the affected limb
  2. Negative cranial drawer sign and normal gait
  3. Positive cranial drawer sign and sitting with the affected leg extended Correct answer.
  4. Pain localized to the carpus

Explanation

Cranial cruciate ligament rupture typically presents with a positive cranial drawer sign (instability) and the dog may sit with the affected leg extended. Muscle atrophy, not hypertrophy, is common. The carpus is not involved in this injury.

Question 39Veterinary Nursing and Patient Care

A technician is calculating a drug dose for a 5 kg cat. The veterinarian orders 2 mg/kg of a drug supplied as a 10 mg/mL solution. What volume should be administered?

  1. 0.5 mL
  2. 1.0 mL Correct answer.
  3. 2.0 mL
  4. 0.1 mL

Explanation

The dose is 2 mg/kg × 5 kg = 10 mg. The concentration is 10 mg/mL, so 10 mg ÷ 10 mg/mL = 1.0 mL. This calculation ensures the correct amount is drawn up for administration.

Question 40Veterinary Nursing and Patient Care

A technician is reviewing a patient's bloodwork and notes a packed cell volume (PCV) of 55% and total protein of 8.0 g/dL. Which interpretation is most accurate?

  1. The patient has hypoproteinemia and should receive colloids.
  2. The patient has a normal PCV and protein level.
  3. The patient is anemic and likely has blood loss.
  4. The patient is dehydrated and may have hemoconcentration. Correct answer.

Explanation

A PCV of 55% is above the normal range for most species, and total protein of 8.0 g/dL is also high. Together, these findings suggest hemoconcentration due to dehydration. Anemia would present with a low PCV, and hypoproteinemia would show low total protein.

Question 41Anesthesia and Analgesia

Which agent is most appropriate for premedication in an aggressive, otherwise healthy dog that needs a brief physical examination before anesthesia induction?

  1. Atropine given intravenously
  2. Acepromazine given intramuscularly Correct answer.
  3. Oxytocin given intramuscularly
  4. Furosemide given intramuscularly

Explanation

Acepromazine is a phenothiazine tranquilizer that produces reliable sedation and is commonly used for chemical restraint in healthy, fractious patients. It is not an analgesic and can cause hypotension, so it is avoided in shock or severely debilitated animals. Atropine, furosemide, and oxytocin do not provide sedation.

Question 42Anesthesia and Analgesia

Which inhalant anesthetic has the lowest blood-gas solubility and therefore the fastest induction and recovery among the volatile agents commonly used in small animals?

  1. Desflurane Correct answer.
  2. Halothane
  3. Methoxyflurane
  4. Isoflurane

Explanation

Speed of induction and recovery with volatile agents depends largely on blood-gas solubility: the lower the solubility, the faster the alveolar-to-brain equilibration. Desflurane has a markedly lower blood-gas partition coefficient than isoflurane, halothane, or methoxyflurane, giving the most rapid changes in depth. Desflurane also requires a heated, pressurized vaporizer, which limits its routine use.

Question 43Anesthesia and Analgesia

A dog under general anesthesia loses its palpebral reflex and develops a dorsally rotated eye with the pupil beginning to dilate. These findings most directly indicate which stage or plane?

  1. Stage II, involuntary excitement
  2. Stage III, surgical anesthesia Correct answer.
  3. Stage IV, medullary paralysis
  4. Stage I, voluntary excitement

Explanation

Loss of the palpebral reflex and central, then ventrally rotated, eye position with a constricted-to-mid pupil are classic signs of surgical anesthesia (stage III). Stage II is the excitement phase marked by struggling, breath-holding, and increased reflexes. Stage IV is overdose with respiratory and cardiovascular collapse.

Question 44Anesthesia and Analgesia

Which finding is the most reliable sign that a cat has reached an adequate surgical plane of anesthesia with an inhalant?

  1. Bilateral nystagmus with jaw tone
  2. Loss of the swallowing reflex with a stable, regular respiratory pattern Correct answer.
  3. Tachypnea with breath-holding
  4. Presence of a brisk pedal withdrawal reflex

Explanation

A surgical plane is supported by abolition of protective reflexes such as swallowing and by a stable, regular respiratory pattern with acceptable cardiovascular values. Persistence of brisk withdrawal reflexes suggests the animal is too light. Breath-holding and nystagmus are signs of inadequate depth or excitement.

Question 45Anesthesia and Analgesia

Which opioid is a partial mu-agonist that provides sedation and analgesia in cats and is commonly combined with acepromazine for restraint?

  1. Morphine
  2. Fentanyl
  3. Butorphanol Correct answer.
  4. Methadone

Explanation

Butorphanol is a mu-partial agonist and kappa-agonist with a ceiling effect, producing sedation and moderate analgesia with less respiratory depression than full mu-agonists. It is frequently used in cats for premedication. Morphine, fentanyl, and methadone are full mu-agonists with greater analgesic potency.

Question 46Anesthesia and Analgesia

Which drug is the reversal agent of choice for a dog recovering from a dexmedetomidine infusion that has caused persistent bradycardia and excessive sedation?

  1. Atipamezole Correct answer.
  2. Yohimbine
  3. Flumazenil
  4. Naloxone

Explanation

Dexmedetomidine is an alpha-2 adrenergic agonist, and atipamezole is its specific alpha-2 antagonist used to reverse sedation and associated bradycardia. Naloxone reverses opioids and flumazenil reverses benzodiazepines. Yohimbine is also an alpha-2 antagonist but is less specific and less commonly used for this purpose in small animals.

Question 47Anesthesia and Analgesia

During anesthesia the pulse oximeter reads 88 percent on a dog breathing room air before induction. What does this reading most directly represent?

  1. Arterial carbon dioxide partial pressure
  2. Mean arterial blood pressure
  3. Arterial oxygen saturation estimated from hemoglobin light absorption Correct answer.
  4. End-tidal inhalant concentration

Explanation

Pulse oximetry estimates arterial hemoglobin oxygen saturation by comparing light absorption at two wavelengths across a pulsatile vascular bed. A value of 88 percent suggests hypoxemia and warrants checking probe placement and providing supplemental oxygen. It does not measure carbon dioxide, blood pressure, or anesthetic concentration.

Question 48Anesthesia and Analgesia

A dog receives acepromazine as premedication and becomes profoundly hypotensive. Which mechanism best explains this effect?

  1. Alpha-1 adrenergic receptor blockade causing vasodilation Correct answer.
  2. Central vagal stimulation causing bradycardia
  3. Direct myocardial calcium channel blockade
  4. Beta-2 receptor stimulation causing tachycardia

Explanation

Phenothiazines such as acepromazine block alpha-1 adrenergic receptors, producing peripheral vasodilation and a fall in blood pressure. The effect is dose dependent and is exaggerated in hypovolemic or shocky patients. Acepromazine does not act primarily through calcium channels, beta-2 stimulation, or vagal bradycardia.

Question 49Anesthesia and Analgesia

A 4 kg cat requires a ketamine dose of 5 mg/kg intravenously. The stock solution is 100 mg/mL. How many milliliters should be administered?

  1. 2.0 mL
  2. 0.5 mL
  3. 0.2 mL Correct answer.
  4. 5.0 mL

Explanation

The total dose is 4 kg multiplied by 5 mg/kg, which equals 20 mg. Dividing 20 mg by the concentration of 100 mg/mL gives 0.2 mL. Checking units before drawing up the drug prevents tenfold dosing errors.

Question 50Anesthesia and Analgesia

Which statement about the use of a cuffed endotracheal tube in a dog undergoing anesthesia is most accurate?

  1. The cuff should be inflated until the pilot balloon is maximally tense to guarantee a seal
  2. The cuff should be filled with saline rather than air
  3. The cuff should be inflated just enough to seal the airway at moderate positive pressure while avoiding tracheal mucosal ischemia Correct answer.
  4. The cuff should remain completely deflated during positive pressure ventilation

Explanation

Cuff inflation should be the minimum needed to create a seal, checked by listening for a leak at moderate airway pressure. Overinflation raises pressure against the tracheal mucosa and can cause ischemia and necrosis. Cuffs are filled with air, and a deflated cuff permits leakage and aspiration.