VTNE Animal Care and Nursing: The 30-Item Domain, From Vital Signs and Blood Pressure to Restraint

One in five scored VTNE items comes from Animal Care and Nursing, more than any other domain. It's also the broadest, spanning patient assessment, nursing procedures, bedside diagnostics, medication routes, specimen collection, behavior and restraint. The way to make that breadth manageable is to tie each task to a published standard you can check.

What the VTNE animal care and nursing domain covers

AAVSB's 2023 content outline gives the domain 30 scored items and ten task statements, paraphrased:

The related knowledge statements include animal assessment and monitoring, behavior, clinical diagnostic procedures, nutrition, safe handling and restraint, husbandry, nursing procedures and rehabilitation, sample collection and handling, public health, environmental safety and disease prevention. AAVSB's study page says the species covered are those in the AVMA's Veterinary Technology Student Essential and Recommended Skills list, which is why the table below includes a horse and a cow.

Vital signs: published ranges, and why sources disagree

Merck Veterinary Manual's reference tables, checked on October 27, 2026:

Sources: Merck's rectal temperature, resting heart rate and resting respiratory rate tables.

Reference ranges differ between sources, and even within one. Merck's own triage table gives a normal heart rate of 150–220 bpm for cats, against 120–140 in its resting table, and 60–120 bpm for large dogs. As Passy's suggestion, learn one set of ranges from your program's main text, and be quickest to recognize values that sit clearly outside every published range.

Perfusion: capillary refill time and mucous membranes

Merck's triage table reads them together:

• Capillary refill time: 1–2 seconds is normal; over 2 seconds suggests poor perfusion or peripheral vasoconstriction; under 1 second suggests a hyperdynamic state, as in fever, heatstroke or early compensatory shock
• Mucous membrane color: pink is normal; pale or white suggests anemia or shock; cyanotic or muddy suggests severe hypoxemia or decompensatory shock; yellow suggests raised bilirubin from liver disease or hemolysis

Body condition score

WSAVA's body condition chart for dogs uses a 9-point scale: 1–3 under ideal, 4–5 ideal, 6–9 over ideal. At 5, the ribs are palpable without excess fat covering, the waist is visible behind the ribs from above, and the abdomen is tucked up from the side. Learn the words for 1, 5 and 9, and the in-between scores follow.

Recall like this is where flashcards help, which is why 120 Animal Care and Nursing flashcards are planned for full VTNE prep.

Blood pressure: the ACVIM protocol and categories

Task D names blood pressure measurement first, and the 2018 ACVIM consensus statement on hypertension in dogs and cats gives a standard protocol. It also notes that "often the most skilled individual is a well-trained technician." Key steps:

1. Measure in a quiet, isolated room away from other animals, usually with the owner present; don't sedate, and let the patient acclimate for 5–10 minutes.
2. Restrain gently, ideally in ventral or lateral recumbency, keeping the cuff close to heart level.
3. Use a cuff about 30–40% of the circumference of the limb or tail at the cuff site.
4. Measure only when the patient is calm and still. Discard the first reading, record 5–7 consecutive consistent values, and average them.
5. Have the same trained person follow the same protocol each time.

ACVIM classifies systolic blood pressure by the risk of target organ damage:

These are awake, in-clinic categories. Blood pressure under anesthesia has different thresholds, covered in the VTNE anesthesia guide.

Tonometry: measuring intraocular pressure

Tonometry measures intraocular pressure (IOP), and Merck's glaucoma chapter calls tonometry and ophthalmoscopy "essential in the diagnosis of glaucoma." Normal values depend on the instrument: Merck's table gives 18.7 ± 5.5 mm Hg for dogs and 19.7 ± 5.6 mm Hg for cats by applanation, and notes 10.8 ± 3.1 mm Hg reported in dogs by the rebound method. One of its case images shows a dog with acute glaucoma at 55 mm Hg. Record which instrument you used along with the number.

IV catheter placement and care

AAHA's 2018 infection control guidelines, on AAVSB's reference list, give a checklist for peripheral IV catheters:

1. Clip hair from the insertion site.
2. Perform hand hygiene and put on clean examination gloves.
3. Prepare the site with gauze, sterile saline and chlorhexidine scrub diluted with sterile saline to 0.5–2% chlorhexidine.
4. Perform hand hygiene again and use sterile or clean gloves to insert the catheter. Don't reuse a catheter after a failed attempt.
5. Attach a cap, T-set or extension set, flush with sterile saline, secure with tape and cover with sterile bandage material.
6. Examine the site at least twice daily for pain, swelling or thrombophlebitis; replace a bandage that isn't clean and dry, and if thrombophlebitis appears and the catheter is still needed, place a new one at a different site.
7. Clean connection sites with single-use isopropyl alcohol wipes when lines are disconnected, and never reuse injection caps.
8. Change IV fluid tubing every 72 hours.

Collecting blood and urine without artifacts

Cornell's eClinPath, which AAVSB's reference list links for clinical pathology, explains what ruins a sample:

Blood for hematology

• Tube. EDTA (purple top) is the preferred anticoagulant; heparin isn't recommended for hematology because platelets and white cells clump
• Smears. Make blood smears at the time of collection to limit storage changes
• Volume and mixing. A small volume of blood in a standard EDTA tube shrinks red cells and distorts indices; mix gently by inverting several times
• Handling. Shaking the tube or forcing blood through a needle can cause hemolysis and platelet clumping
• Storage. Keep samples cool, refrigerated but not frozen, and don't let tubes touch ice directly

Urine

• Cystocentesis is "the cleanest (most sterile) method" and is ideal, though it can cause microscopic hematuria
• Catheterized samples should be sterile but may contain more transitional cells, or blood if the procedure is traumatic
• Free catch (midstream is best) may contain contaminating bacteria and squamous cells
• Off the floor or from litter is the least optimal, with the most contaminants
• Timing. If analysis can't happen within 30 minutes, refrigerate the urine and still analyze it within 12 hours, bringing it to room temperature first. Always record the collection method

The eClinPath urinalysis and hematology pages go further, and the Laboratory Procedures domain picks up where collection ends.

Behavior, handling and restraint

Tasks I and J go together: read the patient, then restrain only as much as needed. The 2022 AAFP/ISFM Cat Friendly Veterinary Interaction Guidelines state that cats "examined with minimal handling show fewer negative responses than cats handled with more heavy restraint methods," that handling methods that raise a cat's fear or frustration "should be avoided," and that "simply avoiding obvious negative interactions, such as excessive restraint or scruffing, is not enough." For dogs and other species, AAVSB's reference list includes Dr. Sophia Yin's Low Stress Handling and Behavior Modification of Dogs and Cats (2024), Sheldon and Topel's Animal Restraint for Veterinary Professionals (2023) and Shaw and Martin's Canine and Feline Behavior for Veterinary Technicians and Nurses (2023).

Two VTNE-style animal care questions, written by Passy

These are original practice questions, not VTNE items.

1. A technician is measuring a calm, awake dog's blood pressure by the ACVIM protocol. Which step is correct?

• A. Give a light sedative first so the readings are stable
• B. Choose a cuff about 30–40% of the circumference of the cuff site
• C. Record the first reading as the result
• D. Measure as soon as the dog enters the room

Answer: B. ACVIM's protocol uses a cuff about 30–40% of the circumference, no sedation, 5–10 minutes of acclimation, and discards the first reading before averaging 5–7 consistent values.

2. A urine sample is needed for bacterial culture. Which collection method gives the cleanest sample?

• A. Free catch, midstream
• B. Cystocentesis
• C. From the litter box
• D. From the exam table after the cat urinates

Answer: B. eClinPath calls cystocentesis the cleanest, most sterile method. Free-catch samples can carry contaminating bacteria, and samples from surfaces have the most contaminants.

To keep going in this domain, 300 Animal Care and Nursing practice questions are planned for full VTNE prep, the largest set for any domain, matching its weight on the exam.

Studying the VTNE's largest domain

As a Passy suggestion, give this domain about a fifth of your study hours, as the VTNE study plan guide does, and work through it by task rather than by species:

1. Assessment (tasks B and D): vital signs, perfusion, body condition, blood pressure, tonometry.
2. Procedures (tasks C, G and H): catheters, wounds and bandages, medication routes, specimen collection.
3. Environment and equipment (tasks E and F): sanitation, isolation, equipment care.
4. Behavior and restraint (tasks I and J): reading fear and stress, choosing the least restraint that works.

Breadth is the challenge here, and short daily sets keep every task in rotation; challenges such as a No-Miss Run are planned for full VTNE prep to keep that daily habit going. The free VTNE practice questions are a mixed set to start with, and the surgical nursing guide covers the sterile side of patient care.