Free VTNE Practice Test: 50 Questions With Answers Explained

Answer: C. 1–2 seconds

Merck's triage parameters list a normal CRT of 1–2 seconds, reflecting normal peripheral perfusion.

Why not the others: A — faster than the normal range listed. B and D — longer than normal; a prolonged CRT is a perfusion finding to report to the veterinarian.

Source: Merck (MSD) Veterinary Manual, table "Parameters to Evaluate During Triage"

Answer: A. A U-40 insulin syringe

U-40 veterinary insulins (for example ProZinc and Vetsulin) are 40 IU/mL, and their labels state that using a syringe other than a U-40 syringe results in incorrect dosing. Syringe markings are calibrated to one concentration.

Why not the others: B — a U-100 syringe's markings assume 100 IU/mL: drawing U-40 insulin to the "10" mark (0.1 mL) delivers only 4 IU. C — converting by eye from mL markings invites dosing errors and isn't what the label directs. D — speed of drawing doesn't fix a calibration mismatch.

Source: ProZinc prescribing information, Package Insert for Cats, “Description” and “Dosage and Administration” (revised 08/2019; DailyMed updated 22 Jan 2025); Vetsulin prescribing information, “Description,” “Dosage and Administration — Vials,” and “How Supplied” (revised 07/2026; DailyMed updated 23 Sep 2026)

Answer: D. 30 minutes

CDC's table of minimum steam cycle times lists 30 minutes at 121 °C for wrapped instruments in a gravity-displacement sterilizer.

Why not the others: A — 4 minutes is the minimum for wrapped instruments in a dynamic-air-removal (prevacuum) cycle at 132 °C. B — not a listed minimum for this cycle. C — 15 minutes is the gravity-displacement time at the higher 132 °C setting.

Source: CDC, "Steam Sterilization Cycle Times," Table 7 (page updated 20 Dec 2023)

Answer: B. 800–1,600 mL/min

4 kg × 200 mL/kg/min = 800 mL/min; 4 kg × 400 mL/kg/min = 1,600 mL/min (0.8–1.6 L/min). AAHA's anesthesia guidelines describe non-rebreathing circuits for patients under about 3–5 kg, with oxygen flow around 200–400 mL/kg/min.

Why not the others: A — that's 20–40 mL/kg/min, the rebreathing-circuit range, too low for a non-rebreathing system. C — a decimal error (ten times too high). D — 500 mL/min is AAHA's minimum flow for rebreathing circuits, not a non-rebreathing rate.

Source: Grubb T et al., 2020 AAHA Anesthesia and Monitoring Guidelines for Dogs and Cats, Phase 2 Step 2b, PDF pp.7–8

Answer: A. Centrifugal flotation using a solution with a specific gravity of 1.18–1.27

CAPC states centrifugal flotation is consistently more sensitive than simple flotation, and flotation solutions should have a specific gravity of about 1.18–1.27 (Sheather's sugar solution is 1.27; sodium nitrate 1.18–1.20).

Why not the others: B — the right solution, but simple flotation recovers fewer eggs than centrifugation. C and D — solutions below the 1.18–1.27 range (tap water is about 1.00) are too light to float many eggs.

Source: Companion Animal Parasite Council, “Microscopic Fecal Exam Procedures,” sections “Why Fecal Centrifugation is Better” and “Fecal Flotation Basics”

Answer: C. Support the hind legs and tuck the hindquarters into the crook of the arm

UC Davis stresses supporting a rabbit's back legs whenever it is picked up, with the rear end tucked into the crook of the arm. Rabbits can injure their backs if they struggle vigorously or jump from a height, so the hindquarters need support.

Why not the others: A and D — neither supports the back legs, which is the key protection. B — unsupported hind legs let the rabbit struggle, the situation that risks a back injury.

Source: UC Davis School of Veterinary Medicine, "Rabbit Care," section "Handling"

Answer: B. Deeper than the usual 1–3 mm reference range for dogs — chart it and report it

Merck gives normal probing depth as about 1–3 mm in dogs and 0.5–1 mm in cats. A 6-mm reading exceeds that and belongs on the dental chart for the veterinarian.

Why not the others: A and D — 6 mm exceeds the expected range for this midsized dog; canine root length alone does not make that reading normal. C — cats' normal depth (0.5–1 mm) is shallower than dogs', so the species don't share one value.

Source: Merck Veterinary Manual, “Periodontal Disease in Small Animals,” “Periodontal Probing” (updated Apr 2025); 2019 AAHA Dental Care Guidelines for Dogs and Cats, “Essential steps of dental cleaning & therapy,” step 5 “Periodontal probing”

Answer: D. Blood type the cat (A/B/AB); a major crossmatch is also strongly recommended

Cats can have strong naturally occurring alloantibodies — type B cats carry high-titer anti-A antibodies — so Merck calls AB typing essential before transfusion and strongly recommends a major crossmatch even before a cat's first transfusion.

Why not the others: A and B — naturally occurring antibodies mean a first transfusion can react. C — type A blood given to a type B cat meets strong anti-A antibodies.

Source: Merck Veterinary Manual, “Blood Transfusions in Dogs and Cats,” feline blood typing and transfusion compatibility (updated Mar 2026); Merck (MSD) Veterinary Manual, “Crossmatching in Dogs and Cats” (reviewed/updated Nov 2024); 2021 ISFM Consensus Guidelines on the Collection and Administration of Blood and Blood Products in Cats, “Alloantibodies” and “Cross-matching”

Answer: A. Naloxone

Naloxone is an opioid antagonist used to reverse opioid effects; the 2024 RECOVER guidelines list it as a reversal agent after opioid exposure.

Why not the others: B — a phenothiazine tranquilizer; it adds sedation rather than reversing it. C — an NSAID analgesic. D — a fluoroquinolone antibiotic.

Source: Burkitt-Creedon JM et al., 2024 RECOVER Guidelines: Updated treatment recommendations for CPR in dogs and cats, Tables 1–2; AAHA, Ralph Harvey, “Crisis Management: How to Handle Emergencies and Complications,” “Human Error,” PDF p.2 (2011); Acepromazine maleate tablet manufacturer label, “Mode of Action” and “Precautions” (DailyMed); Meloxidyl (meloxicam) oral suspension manufacturer label, “Description” and “Indications” (DailyMed); EnroMed 100 (enrofloxacin) manufacturer label, “Description” and “Microbiology” (DailyMed)

Answer: C. Enters the ventral surface and exits the dorsal surface

Radiographic projections are named for where the beam enters and then exits. Ventrodorsal = in through the ventral surface, out through the dorsal surface.

Why not the others: A — that describes a dorsoventral (DV) view. B — that describes a lateral projection. D — the name follows the beam's path, not which surface touches the table.

Source: Introduction to Veterinary Terminology (open textbook), “2.4 Directional and Movement Terms,” “Clinical Insight”

Answer: B. A sodium hypochlorite product labeled effective against canine parvovirus, used at its labeled dilution and full wet contact time

Canine parvovirus is non-enveloped and resists many disinfectants. Merck lists 5% sodium hypochlorite diluted 1:32 as one virucidal example. For the product in use, follow its label directions for canine parvovirus for dilution and the full wet contact time; bleach stock strengths and product directions vary.

Why not the others: A — this product has no demonstrated efficacy against canine parvovirus; efficacy should not be inferred from chemical class alone. C — AAHA notes alcohols are likely not the best choice for non-enveloped viruses. D — cleaning removes organic debris, but it isn't the virucidal step.

Source: Merck Veterinary Manual, “Canine Parvovirus Infection (Parvoviral Enteritis in Dogs),” “Etiology” and “Prevention and Control” (reviewed/updated Jun 2025); 2018 AAHA Infection Control, Prevention, and Biosecurity Guidelines, “Overview of ICPB Procedures,” “Cleaning and Disinfection”; AAHA, “Infection control, prevention, and biosecurity: Making a plan,” “Cleaning and disinfection” (2 Oct 2024)

Answer: A. Loperamide should be avoided in dogs that carry the mutation.

Cornell's MDR1 resource says loperamide should be avoided entirely in dogs with the mutation because of their risk of drug toxicity.

Why not the others: B — Cornell lists the mutation in Australian shepherds and Shetland sheepdogs as well as collies. C — heartworm preventives remain safe at low, FDA-approved label doses; higher ivermectin doses can cause toxicity. D — genetic testing identifies whether a dog carries the variant.

Source: Cornell University College of Veterinary Medicine, “Drug sensitivity: MDR1,” “Breed predisposition,” “Drugs of concern,” “Diagnosis,” and “Genetics”

Answer: D. Opened (unlocked) so steam can contact all surfaces

CDC's sterilizing-practices guidance, citing AAMI, says hinged instruments should be opened before sterilization so the sterilant reaches all surfaces.

Why not the others: A, B, C — a closed position can prevent steam from directly contacting all instrument surfaces.

Source: CDC, "Sterilizing Practices," section "Packaging" (updated 28 Nov 2023)

Answer: C. Pressure buildup in the circuit and lungs, causing pulmonary barotrauma

With the valve closed, fresh gas has no exit, so pressure builds in the breathing system and the patient's lungs — leading to barotrauma and, at the extreme, pneumothorax. AAHA instructs reopening the APL valve after a successful machine leak test; temporary closure can also be used during monitored manual ventilation.

Why not the others: A, B, D — none is the immediate danger of a closed valve; rising circuit pressure is.

Source: Veterinary Anesthesia & Analgesia Support Group, “Avoiding pop-off valve related fatalities”; 2020 AAHA Anesthesia and Monitoring Guidelines, Phase 2 Step 2c, PDF p.8 (leak test)

Answer: B. Rigor mortis

The AVMA euthanasia guidelines say a combination of criteria is most reliable for confirming death, and that none of the signs alone confirms death except rigor mortis.

Why not the others: A, C, D — each is one of the AVMA's confirming criteria, but on its own none confirms death.

Source: AVMA Guidelines for the Euthanasia of Animals: 2020 Edition, Section I7 “Confirmation of Death,” pp.16–17

Answer: A. About 394 kcal/day

10^0.75 ≈ 5.62; 70 × 5.62 ≈ 394 kcal/day. Use the y^x (power) key on a scientific calculator.

Why not the others: B — multiplies 70 × 10 and skips the exponent. C — uses 100 instead of 70 as the multiplier. D — a decimal-place slip.

Source: 2021 AAHA Nutrition and Weight Management Guidelines, Box 1 “Energy Requirement Calculations,” PDF p.1

Answer: D. Adult female worms

The American Heartworm Society explains that the antigen detected comes mainly from the reproductive tract of adult female Dirofilaria immitis. Current heartworm antigen tests do not reliably detect infections made up only of male worms.

Why not the others: A and B — antigen tests aren't designed to detect immature stages. C — male-only infections are the ones antigen tests can miss.

Source: American Heartworm Society, Canine Guidelines (revised 2024; file dated 19 Jun 2025), “Antigen Tests,” printed pp.14–15 (PDF pp.16–17)

Answer: B. Clean-contaminated

CDC's surgical wound classification puts operations that enter the alimentary, respiratory, genital, or urinary tract under controlled conditions, without unusual contamination, in Class II: clean-contaminated.

Why not the others: A — clean wounds don't enter those tracts. C — gross spillage, a major break in sterile technique, or acute nonpurulent inflammation would support a contaminated classification. D — existing infection or perforated viscera would support a dirty/infected classification.

Source: Mangram AJ et al., CDC Guideline for Prevention of Surgical Site Infection, 1999, Table 7 "Surgical Wound Classification," p.109

Answer: C. The tube is in the esophagus

AAHA uses a definitive ETCO₂ tracing to confirm tube placement. The esophagus holds very little CO₂, so an esophageal tube reads very low to zero. Tell the veterinarian and recheck placement. An absent waveform is not diagnostic by itself; other patient and equipment causes of signal loss must also be considered.

Why not the others: A — hyperthermia can alter ventilation but does not explain the absent sustained waveform in this setting. B — with functioning monitoring and adequate ventilation and perfusion, a correctly placed tube should produce a sustained CO₂ waveform. D — hypercapnia is increased carbon dioxide, not an explanation for the absent exhaled CO₂ signal.

Source: 2020 AAHA Anesthesia and Monitoring Guidelines, Step 4c, PDF p.17; Step 2 equipment checks, PDF p.6; Shippy S, “Capnography in Anesthesia,” Today’s Veterinary Practice, Jul/Aug 2024, pp.74–76: tube placement, loss of waveform, and decreased ETCO₂

Answer: A. Retinal toxicity, including blindness

The FDA-approved Baytril label states not to exceed 5 mg/kg/day in cats because rare retinal toxicity has been reported; in safety studies, higher doses caused retinal changes and blindness.

Why not the others: B, C, D — none is the cat-specific warning on the label.

Source: FDA Freedom of Information Summary, NADA 140-441 (Baytril), §III.B label warnings and §III.A.5

Answer: D. A pulse deficit — suggestive of an arrhythmia; report it, since an ECG is indicated

Fewer pulses than heartbeats is a pulse deficit. Merck notes that tachycardia with irregularity or pulse deficits usually means an arrhythmia, and an ECG is indicated.

Why not the others: A and B — a pulse deficit is an abnormal finding, not something to dismiss. C — this finding does not by itself establish dehydration or justify fluid treatment; report it promptly for assessment.

Source: Merck (MSD) Veterinary Manual, "Parameters to Evaluate During Triage"; University of Guelph, "Understanding Normal and Abnormal Heart Rhythm"

Answer: B. Acute renal failure and death with repeated use

The boxed warning states that repeated use of meloxicam in cats has been associated with acute renal failure and death, and that additional injectable or oral doses should not be given to cats. It appears on all brand and generic veterinary meloxicam labels.

Why not the others: A and D — not what the boxed warning describes. C — retinal toxicity is the cat warning for enrofloxacin, not meloxicam.

Source: FDA, “Information About the Boxed Warning on Meloxicam Labels Regarding Safety Risks in Cats” (content current as of 26 Nov 2024); FDA Freedom of Information Summary, NADA 140-441 (Baytril), §III.B label warnings and §III.A.5

Answer: C. At collar level, outside the lead apron and thyroid shield

The University of Pennsylvania veterinary radiation-safety policy directs staff to wear the film badge at collar level above protective clothing. This records exposure at that unshielded location; badge placement must follow the facility's monitoring program.

Why not the others: A — under the apron, the badge would underestimate the dose to unshielded areas. B — a wrist placement is not the whole-body badge position these rules specify. D — a wall badge doesn't measure the person's dose.

Source: University of Pennsylvania EHRS, Veterinary Energized Equipment User’s Guide (2012 edition), §V.B “Dosimeter Placement,” PDF p.4

Answer: A. White blood cells and platelets

eClinpath describes the buffy coat — the thin layer between the packed red cells and the plasma — as containing white blood cells and platelets.

Why not the others: B — red cells form the packed column at the bottom. C — plasma is the fluid column above the buffy coat. D — bacteria aren't what this layer represents.

Source: eClinpath (Cornell University), "Hematocrit — Method of measurement"

Answer: D. Feed half the normal meal and give half the insulin dose 2–4 hours before, monitor blood glucose, and schedule the dog as the first case of the day

AAHA's fasting recommendations for diabetic patients call for half a meal and half the insulin dose 2–4 hours before the procedure, blood-glucose monitoring before, during, and after anesthesia, and scheduling as the first case. The veterinarian must individualize the feeding and insulin instructions for the patient; the figure is guidance, not an exclusive protocol.

Why not the others: A — a full insulin dose without food risks hypoglycemia. B and C — neither matches AAHA's recommendation.

Source: 2020 AAHA Anesthesia and Monitoring Guidelines, “Fasting and Treatment Recommendations for Dogs and Cats Prior to Anesthesia,” diabetic row and individual-patient guidance, PDF p.1; Vetsulin manufacturer label (rev. Jul 2026), DailyMed, Owner Information Sheet: possible side effects and causes of hypoglycemia

Answer: B. Below normal — consistent with keratoconjunctivitis sicca (dry eye)

The American College of Veterinary Ophthalmologists describes more than 15 mm/min as normal in dogs and less than 15 mm/min as suggestive of, or diagnostic for, keratoconjunctivitis sicca (KCS).

Why not the others: A — 9 mm/min is below the normal threshold. C — a low reading means reduced, not excessive, tear production. D — the test has a clear normal cut-off.

Source: ACVO, “Dry Eye Disease or Keratoconjunctivitis Sicca (KCS)” (22 Sep 2020), “How is KCS diagnosed?”

Answer: C. Starting at the planned incision site and working outward toward the periphery

In this concentric-circle gauze protocol, surgical-site preparation starts at the anticipated incision site and works outward toward the periphery. Discard the used sponge at the edge and use a fresh sponge for the next pass. Application technique and contact time must follow the selected product and protocol.

Why not the others: A — moving inward carries contamination toward the incision. B — back-and-forth strokes are not the selected concentric-circle technique; some other products do specify them. D — use the specified application pattern and contact time, not an arbitrary direction or amount.

Source: University of Illinois Animal Care and Use, “Preparation of the Surgical Site” (rev. 6 Mar 2021), Step 4 “Final Skin Preparation”; Veterinary Clinical Skills Compendium, “Patient prep,” “Scrub from center to perimeter” and How to instructions; ChloraPrep One-Step prescribing/product label, DailyMed, “Directions” (updated 23 Oct 2025)

Answer: A. 0.2 mL

Dose = 5 mcg/kg × 20 kg = 100 mcg = 0.1 mg. Volume = 0.1 mg ÷ 0.5 mg/mL = 0.2 mL. Convert micrograms to milligrams before dividing.

Why not the others: B — treats 100 mcg as 1 mg (a tenfold error). C — treats 100 mcg as 10 mg (a hundredfold error). D — slips the decimal the other way.

Source: Worked arithmetic (1 mg = 1,000 mcg); applied mathematics is Knowledge Statement 7 in the AAVSB VTNE Content Outline

Answer: D. PD2

AVDC stages: PD0 normal; PD1 gingivitis without attachment loss; PD2 less than 25% attachment loss; PD3 25–50%; PD4 more than 50%. Fifteen percent falls in PD2.

Why not the others: A — PD0 is a normal tooth. B — PD1 has no attachment loss. C — PD3 begins at 25%.

Source: American Veterinary Dental College, AVDC Nomenclature, “Stages of Periodontal Disease” (live reference)

Answer: B. Calcium oxalate

Merck notes that calcium oxalate crystals — monohydrate most commonly, and dihydrate — may appear in ethylene glycol toxicosis, as early as about 3 hours after ingestion in cats and 6 hours in dogs.

Why not the others: A, C, D — none is the crystal type associated with ethylene glycol.

Source: Merck Veterinary Manual, "Ethylene Glycol Toxicosis in Animals," Diagnosis (updated Sep 2024); Cornell eClinpath, “Crystals,” calcium oxalate dihydrate/monohydrate, struvite, cystine, and bilirubin sections

Answer: C. Behind the shoulder, inside the edge of the flight zone

The point of balance is at the cow's shoulder. A handler positioned behind the shoulder moves the cow forward; one positioned in front of the shoulder moves it backward. Cattle move when a person enters their flight zone — the animal's personal space.

Why not the others: A and B — standing in front of the shoulder tends to make the cow back up, not walk forward. D — standing outside the flight zone does not apply the flight-zone pressure used to prompt this movement.

Source: Cooperative Extension Ag Safety and Health, "What Is a Cow's Flight Zone?" (May 17, 2019)

Answer: A. Replace it — the color can revert to white even when the absorbent is exhausted

Standard soda lime turns purple as it is exhausted and can revert to white after resting, so the color alone can't be trusted the next day. AAHA recommends changing absorbent after 8 hours of use.

Why not the others: B — color reversion makes "white" misleading. C — exhausted absorbent lets CO₂ be rebreathed; a falling ETCO₂ is not a replacement trigger. D — shaking doesn't restore spent absorbent.

Source: 2020 AAHA Anesthesia and Monitoring Guidelines, Step 2a, PDF p.7 (8-hour interval), and Step 2b, PDF p.8 (CO₂ absorption in rebreathing circuits); Midmark, “A Practical Guide for Soda Lime Replacement in Veterinary Anesthesia” (15 Jul 2025), “How New Color Indicators Can Help”

Answer: B. Struvite (magnesium ammonium phosphate)

eClinpath describes struvite crystals as colorless, three-dimensional prisms often likened to coffin lids.

Why not the others: A, C, D — each has a different characteristic appearance on eClinpath's crystal reference; the coffin-lid prism is struvite.

Source: eClinpath, "Crystals — Struvite"

Answer: D. The front from chest to the level of the sterile field, and the sleeves from about 2 inches above the elbow to, but not including, the cuff

AORN's cited sterile-field recommendations limit the sterile area of a gown to the front from chest to the level of the sterile field, and the sleeves from 2 inches above the elbow to, but not including, the cuff. The cuffs should remain covered by the sterile gloves.

Why not the others: A and C — the back can't be watched and isn't considered sterile. B — below the level of the sterile field is not considered sterile.

Source: AORN, Recommended Practices for Maintaining a Sterile Field, 2012 compilation (last revised Nov 2005), Recommendation I, items 5–6, printed p.87 (one-page preview)

Answer: A. Hypotension from vasodilation

Merck explains that acepromazine's alpha-1 adrenergic blocking effect on vascular smooth muscle causes vasodilation, and hypotension can occur.

Why not the others: B and D — vasodilation lowers, not raises, blood pressure. C — not the effect Merck highlights for acepromazine.

Source: Merck Veterinary Manual, "Tranquilizers, Sedatives, and Analgesics," section "Acepromazine as a Tranquilizer or Sedative for Animals" (updated Aug 2025)

Answer: C. 4–5%

Merck's lowest dehydration grade, 4–5%, is defined by semidry mucous membranes with normal skin turgor and normal eye moisture. Higher grades require additional findings. Merck also stresses that these estimates are subjective.

Why not the others: A — on this scale, these findings fit the 4–5% estimate rather than 0%. B and D — higher grades need more abnormal findings than tacky membranes alone.

Source: Merck Veterinary Manual, "The Fluid Resuscitation Plan in Animals," section "Determination of the Fluid Deficit" (reviewed Nov 2025)

Answer: B. Beam penetration rises and contrast falls (a longer scale of contrast)

Higher kVp gives the beam more penetrating power and narrows the differences in attenuation between tissues, so contrast drops and the image shows more shades of gray (long-scale contrast).

Why not the others: A — reverses the relationship. C — kVp is the main control of contrast. D — penetration increases, not decreases.

Source: Merck Veterinary Manual, "Radiography of Animals," sections "Equipment in Radiography of Animals" and "Filmless (Digital) Radiography of Animals" (updated Apr 2025)

Answer: D. Once the dog can protect its airway by swallowing vigorously, with normal breathing and SpO₂

AAHA directs extubation when respiratory rate and SpO₂ are normal and the patient can adequately protect its airway by swallowing vigorously. VASG stresses waiting for a clear swallow, especially in brachycephalic breeds.

Why not the others: A, B, C — none of these signs alone establishes that the dog can protect its airway, which is the concern in brachycephalic patients.

Source: 2020 AAHA Anesthesia and Monitoring Guidelines, Step 4e "Recovery from Anesthesia" (PDF p.20); VASG, "Recovery," item 2

Answer: A. Wash the wound thoroughly with soap and water right away, then seek medical care

CDC advises washing bites or scratches immediately with soap and water after a possible rabies exposure, then urgently seeking medical attention. A physician decides whether post-exposure treatment is needed; the technician's role is first aid and referral, not medical advice.

Why not the others: B and D — delaying medical evaluation after a possible rabies exposure is the dangerous choice. C — skipping washing removes the immediate first-aid step.

Source: CDC, "About Rabies" (Jan 27, 2026)

Answer: C. Metzenbaum scissors

Metzenbaum scissors are fine scissors for delicate tissue and blunt dissection.

Why not the others: A — Mayo scissors are for heavier tissue such as fascia. B and D — made for bandage material and wire, not for tissue dissection.

Source: University of Saskatchewan WCVM, VSAC 205 Lab 1 "Scissors"; WVS Academy, "Instruments," section "Scissors" — "Non-tissue scissors" and "Tissue scissors"

Answer: D. Chloramphenicol

21 CFR 530.41 lists drugs prohibited for extralabel use in food-producing animals; chloramphenicol heads the list (others include clenbuterol, diethylstilbestrol, nitroimidazoles, and furazolidone).

Why not the others: A, B, C — none appears on the 530.41 prohibited list.

Source: 21 CFR 530.41(a)(1) (eCFR, displayed content up to date as of 15 Oct 2026; checked 17 Oct 2026 UTC)

Answer: B. Hypophosphatemia

MSPCA-Angell's critical-care team calls hypophosphatemia the hallmark sign of refeeding syndrome, often alongside hypokalemia and hypomagnesemia.

Why not the others: A — phosphorus falls, not rises. C and D — not the defining changes of refeeding syndrome.

Source: MSPCA-Angell, "Refeeding Syndrome" (Sumner, DACVECC; Feb 2026)

Answer: C. Perpendicular to an imaginary line that bisects the angle between the tooth's long axis and the sensor

When the sensor can't sit parallel to the tooth, the angle between the root and the sensor is bisected, and the beam is aimed perpendicular to that bisecting line. In dogs and cats, the parallel technique works only for the caudal mandibular premolars and molars.

Why not the others: A and B — each makes the beam perpendicular to one side of the angle instead of the line that bisects it. D — a beam running parallel to the sensor wouldn't strike it to make an image.

Source: Niemiec B, "Practical Dentistry: Techniques for Intraoral Radiology," Today's Veterinary Practice (14 Aug 2015), "Step 3. Positioning the Tube Head"

Answer: A. In the monolayer, just behind the feathered edge

eClinpath identifies the monolayer — about one 10× field behind the feathered edge, where cells lie side by side without overlapping — as the area for differential counts.

Why not the others: B — in the thick body of the smear, cells crowd together and white cells look shrunken, so they are hard to identify. C — at the feathered edge, white cells are smudged, red cells flatten, and large cells collect there. D — location changes what you see, so it changes the count.

Source: eClinpath, "Blood Smear Examination — Components of a blood smear: Monolayer"

Answer: D. Combining drugs or methods that act on pain in different ways, so no single drug carries the whole plan

AAHA's guiding principles call for a multimodal approach that interrupts pain pathways using multiple differing approaches, so the plan doesn't rely on any single drug.

Why not the others: A and B — single-drug strategies are what multimodal plans avoid. C — waiting for obvious pain isn't a multimodal strategy.

Source: Gruen ME et al., 2022 AAHA Pain Management Guidelines for Dogs and Cats, JAAHA 58(2), Introduction (printed p.56; PDF p.2) and "Acute Pain of Known Cause (e.g., Perioperative or Diagnosed, Known Trauma)" (printed p.66; PDF p.12)

Answer: B. Below 98 °F (36.7 °C); monitor temperature and start heat support early

AAHA defines hypothermia as below 98 °F (36.7 °C), notes it causes multiple complications, and calls temperature monitoring critical, with heat supplementation starting early.

Why not the others: A — AAHA says to start heat support early, not after recovery. C — sets the threshold too low. D — AAHA calls temperature monitoring critical.

Source: 2020 AAHA Anesthesia and Monitoring Guidelines, Step 4d (PDF pp.18–19) and Step 4e (PDF p.20); early temperature support (PDF p.13)

Answer: C. Polydioxanone (PDS)

Polydioxanone is an absorbable monofilament suture; for its PDS II product, Ethicon lists absorption at about 182–238 days.

Why not the others: A — nonabsorbable; nylon can be monofilament or braided. D — a nonabsorbable monofilament. B — nonabsorbable and braided.

Source: Merck Manual Professional, "Suture Materials" table; Ethicon, PDS II product page; Ethicon, NUROLON Nylon technical data, material and structure fields

Answer: A. 20 mL

Use C₁V₁ = C₂V₂: 12% × V₁ = 3% × 80 mL, so V₁ = (3 × 80) ÷ 12 = 20 mL of stock. Then add diluent until the total volume is 80 mL (about 60 mL of diluent).

Why not the others: B — 60 mL is roughly the diluent you add, not the stock you measure. C — inverts the ratio (12 × 80 ÷ 3). D — 2.4 g is the amount of solute in the finished solution (3 g per 100 mL × 80 mL), not a volume of stock.

Source: Worked arithmetic (C₁V₁ = C₂V₂; % w/v = grams per 100 mL); applied mathematics is Knowledge Statement 7 in the AAVSB VTNE Content Outline

Answer: D. Gastric dilatation-volvulus (GDV); alert the veterinarian immediately

Merck lists nonproductive retching, hypersalivation, restlessness, and acute or progressive abdominal distension as the clinical findings of GDV, which occurs mainly in large and giant deep-chested breeds. It's an emergency.

Why not the others: A, B, C — none fits this classic presentation, and each delays emergency care.

Source: MSD Veterinary Manual (Merck), "Gastric Dilation and Volvulus in Small Animals," Epidemiology and Clinical Findings (Aug 2025)

Answer: B. The 8th intercostal space

The University of Guelph protocol measures the nasoesophageal tube's final insertion length from the nose tip to the 8th intercostal space. Premeasurement does not confirm correct placement. The chapter requires confirmation before delivering fluids through the tube and identifies radiography as the safest way to document proper placement.

Why not the others: A — the 13th rib is the landmark for a nasogastric tube, which ends in the stomach. C — the medial canthus is a nearby landmark on the head, not the tube's end point. D — the thoracic inlet is the first landmark used during placement, not the final insertion-length landmark.

Source: University of Guelph, VETM 4540 "Nasoesophageal and Nasogastric Tube Placement," sections "Landmarks" and "Procedure"