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NM Vet Tech practice questions

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Question 1Pharmacy and Pharmacology

Which route of administration typically produces the fastest onset of action for a drug given to a veterinary patient?

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

Explanation

Intravenous administration places the drug directly into the bloodstream, bypassing absorption entirely, so the effect begins almost immediately. Subcutaneous and intramuscular routes require absorption from tissue, and oral administration must survive the GI tract and first-pass hepatic metabolism, all of which delay onset.

Question 2Pharmacy and Pharmacology

A technician is asked to calculate a dose. The order is 5 mg/kg and the patient weighs 12 kg. What total dose should be administered?

  1. 17 mg
  2. 0.42 mg
  3. 2.4 mg
  4. 60 mg Correct answer.

Explanation

Dose calculation multiplies the mg/kg rate by body weight in kilograms: 5 mg/kg × 12 kg = 60 mg. Always confirm the units cancel correctly (kg cancels, leaving mg) before drawing up the drug.

Question 3Pharmacy and Pharmacology

Which term describes the study of what the body does to a drug, including absorption, distribution, metabolism, and excretion?

  1. Pharmacognosy
  2. Pharmacodynamics
  3. Pharmacotherapeutics
  4. Pharmacokinetics Correct answer.

Explanation

Pharmacokinetics describes the movement and fate of a drug within the body over time, summarized as absorption, distribution, metabolism, and excretion. Pharmacodynamics instead describes what the drug does to the body, such as receptor binding and physiologic effect.

Question 4Pharmacy and Pharmacology

Which class of drug is dexmedetomidine, commonly used in small animal practice for sedation and analgesia?

  1. Cholinergic antagonist
  2. Opioid antagonist
  3. Alpha-2 adrenergic agonist Correct answer.
  4. Beta-2 adrenergic agonist

Explanation

Dexmedetomidine is a selective alpha-2 adrenergic agonist that produces sedation, muscle relaxation, and analgesia while reducing sympathetic outflow. Its effects can be reversed with an alpha-2 antagonist such as atipamezole.

Question 5Pharmacy and Pharmacology

A veterinarian prescribes a drug with a narrow therapeutic index. What is the most important clinical implication of this property?

  1. The drug has no measurable side effects
  2. Small changes in dose or blood level can cause toxicity Correct answer.
  3. The drug must always be given with food
  4. The drug cannot be given by injection

Explanation

A narrow therapeutic index means the toxic dose is close to the effective dose, so small increases in blood concentration can produce adverse effects. Patients on such drugs require careful dosing and often therapeutic drug monitoring.

Question 6Pharmacy and Pharmacology

Which federal agency in the United States regulates veterinary drugs and approves them for marketing?

  1. EPA
  2. USDA APHIS
  3. FDA Center for Veterinary Medicine Correct answer.
  4. DEA

Explanation

The FDA's Center for Veterinary Medicine reviews and approves animal drugs, including their labeling and withdrawal times for food animals. The DEA handles controlled substances, USDA APHIS addresses animal health programs, and EPA regulates pesticides.

Question 7Pharmacy and Pharmacology

A drug is described as having high first-pass metabolism. What does this mean for oral administration?

  1. A larger oral dose may be needed because much of the drug is inactivated before reaching systemic circulation Correct answer.
  2. The drug is absorbed more completely from the stomach
  3. The drug will have a longer duration of action than when injected
  4. The drug cannot be metabolized by the liver

Explanation

First-pass metabolism occurs as absorbed drug passes through the liver before entering systemic circulation, reducing the fraction that reaches target tissues. Consequently, oral doses often must be higher than parenteral doses to achieve comparable blood levels.

Question 8Pharmacy and Pharmacology

Why is it important to check the drug label for the withdrawal time before treating a food-producing animal?

  1. To determine the drug's storage temperature
  2. To calculate the patient's body surface area
  3. To ensure drug residues in meat or milk fall below regulatory limits before slaughter or sale Correct answer.
  4. To decide which syringe size to use

Explanation

Withdrawal time is the interval after the last dose during which the animal or its products cannot enter the food supply, ensuring residues are below legal tolerance limits. Violating withdrawal times creates public health risk and regulatory violations.

Question 9Pharmacy and Pharmacology

A patient receiving a known nephrotoxic drug is also given an NSAID. Why might the technician flag this combination to the veterinarian?

  1. Both can reduce renal blood flow, increasing the risk of kidney injury Correct answer.
  2. NSAIDs reverse the nephrotoxic drug's effects
  3. NSAIDs increase the nephrotoxic drug's antibacterial activity
  4. The combination causes immediate anaphylaxis

Explanation

NSAIDs inhibit prostaglandins that help maintain renal perfusion, especially in dehydrated or compromised patients, and combining them with another nephrotoxic agent compounds the risk. The technician should alert the veterinarian so alternatives or additional monitoring can be considered.

Question 10Pharmacy and Pharmacology

Which drug is the specific reversal agent for opioid-induced respiratory depression in a dog?

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

Explanation

Naloxone is a competitive opioid receptor antagonist that rapidly reverses opioid effects including respiratory depression. Atipamezole and yohimbine reverse alpha-2 agonists, and flumazenil reverses benzodiazepines.

Question 11Pharmacy and Pharmacology

A drug is labeled for intramuscular use but the technician is asked to give it intravenously. What is the safest action?

  1. Give it intravenously at the same dose
  2. Give it intravenously at half the dose
  3. Confirm with the veterinarian before changing the labeled route Correct answer.
  4. Refuse to administer any drug and document the refusal

Explanation

Route of administration affects absorption, onset, and toxicity, so deviating from the labeled route requires veterinary authorization and consideration of species-specific risks. The technician should clarify with the veterinarian rather than improvise.

Question 12Pharmacy and Pharmacology

Which statement best explains why a bacteriostatic antimicrobial may be a poor choice for a severely immunocompromised patient?

  1. It inhibits bacterial growth but relies on host defenses to eliminate the organisms Correct answer.
  2. It cannot be given orally
  3. It is always ineffective against gram-positive organisms
  4. It kills bacteria too rapidly and causes endotoxin release

Explanation

Bacteriostatic drugs slow or stop bacterial multiplication but depend on the immune system to clear the remaining organisms. In an immunocompromised patient, a bactericidal drug that actively kills bacteria is generally preferred.

Question 13Pharmacy and Pharmacology

A technician must draw up a controlled substance for a surgical patient. Which practice is required for accurate recordkeeping?

  1. Record the drug only if more than 1 mL is used
  2. Record only the total volume removed from the bottle
  3. Record usage at the end of the month from memory
  4. Record the drug, amount used, amount wasted, and patient on the controlled substance log Correct answer.

Explanation

Controlled substance logs must document each transaction, including the amount administered, the amount discarded, and the patient, so that inventory reconciles with usage. Complete contemporaneous records support accountability and regulatory compliance.

Question 14Pharmacy and Pharmacology

A vaccine is stored in a refrigerator that is accidentally unplugged overnight. What is the most appropriate action?

  1. Place the vaccine in a freezer to restore potency
  2. Quarantine the vaccine and follow the manufacturer's or clinic protocol before use Correct answer.
  3. Use the vaccine immediately since it was cold when found
  4. Discard all vaccine without checking the manufacturer's guidance

Explanation

Vaccines are temperature-sensitive biologics, and a cold-chain break may reduce potency without visible change. The product should be quarantined and the manufacturer or clinic protocol consulted to determine whether it remains usable.

Question 15Pharmacy and Pharmacology

Which pharmacokinetic parameter describes the volume of plasma that would contain the entire administered dose at the observed concentration?

  1. Bioavailability
  2. Half-life
  3. Clearance
  4. Volume of distribution Correct answer.

Explanation

Volume of distribution is a theoretical volume relating the amount of drug in the body to its plasma concentration, and a large value suggests extensive tissue distribution. Clearance describes elimination rate, half-life describes time to halve concentration, and bioavailability describes the fraction reaching circulation.

Question 16Pharmacy and Pharmacology

A drug is formulated as an extended-release tablet. Why should it generally not be crushed before administration?

  1. Crushing releases the full dose at once and can cause toxicity Correct answer.
  2. Crushing eliminates the drug's taste
  3. Crushing makes the drug too large to swallow
  4. Crushing converts the drug into an inactive metabolite

Explanation

Extended-release formulations are designed to release drug slowly, and crushing disrupts that mechanism, producing a rapid bolus that may cause adverse effects. If a patient cannot swallow tablets, the veterinarian should be consulted about alternative formulations.

Question 17Pharmacy and Pharmacology

A cat is prescribed a drug that is highly glucuronidated in most species. Why does this matter in feline patients?

  1. Cats have limited glucuronidation capacity, so the drug may accumulate and cause toxicity Correct answer.
  2. Cats lack the target receptor for the drug
  3. Cats metabolize the drug faster and need higher doses
  4. Cats absorb the drug only through the skin

Explanation

Felines are deficient in certain glucuronidation pathways, which slows elimination of drugs dependent on that conjugation and increases the risk of accumulation and toxicity. Dosing in cats therefore often requires adjustment or selection of an alternative drug.

Question 18Pharmacy and Pharmacology

Which statement correctly distinguishes bactericidal from bacteriostatic antimicrobial action?

  1. Bactericidal agents are always safe, while bacteriostatic agents are always toxic
  2. Bactericidal agents are given only topically, while bacteriostatic agents are given only orally
  3. Bactericidal agents kill bacteria, while bacteriostatic agents inhibit growth and replication Correct answer.
  4. Bactericidal agents only work against anaerobes, while bacteriostatic agents only work against aerobes

Explanation

The classification depends on whether the drug actively kills organisms or merely suppresses their multiplication, allowing host defenses to clear them. The distinction is concentration- and organism-dependent, but the core definition is killing versus inhibition of growth.

Question 19Pharmacy and Pharmacology

A patient on long-term glucocorticoid therapy is abruptly withdrawn from the drug. What is the primary concern?

  1. Adrenocortical insufficiency because the hypothalamic-pituitary-adrenal axis is suppressed Correct answer.
  2. Loss of drug tolerance requiring a higher dose
  3. Immediate recurrence of infection because the immune system overreacts
  4. Sudden hypoglycemia because glucocorticoids lower blood glucose

Explanation

Prolonged glucocorticoid administration suppresses the hypothalamic-pituitary-adrenal axis, so abrupt cessation can leave the patient unable to mount an adequate cortisol response. Tapering allows the axis to recover and prevents an addisonian crisis.

Question 20Pharmacy and Pharmacology

A veterinarian wants to minimize the risk of antimicrobial resistance when treating a suspected bacterial infection. Which approach best reflects prudent use?

  1. Base drug selection on culture and susceptibility results when feasible, and use the shortest effective course Correct answer.
  2. Continue the antimicrobial until the client runs out of medication
  3. Combine multiple antimicrobials routinely regardless of indication
  4. Use the broadest-spectrum drug available for every infection

Explanation

Prudent antimicrobial use relies on confirming the pathogen and its susceptibility, selecting the narrowest effective agent, and treating for the appropriate duration. Broad-spectrum or prolonged empirical use and unnecessary combinations promote resistance and adverse effects.

Question 21Surgical Nursing

When preparing a patient for surgery, which agent is most commonly administered as a premedication to provide sedation, analgesia, and reduce anesthetic requirements?

  1. Atropine alone
  2. Furosemide
  3. Butorphanol Correct answer.
  4. Acepromazine alone

Explanation

Butorphanol is an opioid agonist-antagonist that provides sedation and visceral analgesia as part of a balanced premedication protocol, reducing the dose of induction and maintenance agents needed. Acepromazine provides sedation and antiemetic effects but no analgesia, so it does not fulfill the analgesic component.

Question 22Surgical Nursing

A surgical technologist is setting up a minor procedure and needs to know the standard classification of a clean-contaminated surgical wound. Which description best fits this category?

  1. A wound created under controlled conditions with no inflammation and no entry into the respiratory, GI, or urinary tract
  2. A wound made in a controlled setting with entry into a hollow viscus under minimal spillage Correct answer.
  3. A wound containing pus or devitalized tissue from a preexisting infection
  4. A wound with acute, nonpurulent inflammation or a major break in sterile technique

Explanation

Clean-contaminated wounds are created under controlled conditions but involve entry into a hollow viscus such as the GI or urinary tract with minimal spillage. This classification guides decisions about prophylactic antibiotics and postoperative monitoring.

Question 23Surgical Nursing

During instrument care after a procedure, which step should occur before instruments are placed in an ultrasonic cleaner?

  1. Bend hinged instruments to test their tension
  2. Lubricate the instruments with mineral oil
  3. Rinse off gross debris and open box locks and hinges Correct answer.
  4. Soak instruments in a saline solution overnight

Explanation

Gross debris should be removed and hinged instruments opened so the ultrasonic cleaner can reach all surfaces and box locks. Saline causes corrosion and overnight soaking is unnecessary and damaging.

Question 24Surgical Nursing

Which suture material is classified as a nonabsorbable, monofilament synthetic suture commonly used for skin closure?

  1. Chromic catgut
  2. Polyglactin 910
  3. Nylon Correct answer.
  4. Silk

Explanation

Nylon is a nonabsorbable monofilament synthetic suture with good tensile strength and low tissue reactivity, making it suitable for skin closure. Its monofilament nature also reduces the risk of harboring bacteria compared with braided materials.

Question 25Surgical Nursing

A patient is being positioned in dorsal recumbency for abdominal surgery. Which action best protects the patient's airway and circulation during positioning?

  1. Removing all padding to keep the patient flat
  2. Extending the neck fully to open the airway
  3. Tying the forelimbs tightly to the table to prevent movement
  4. Placing a small pad under the cervical region to keep the neck slightly flexed and the head level Correct answer.

Explanation

A small pad under the neck keeps the head slightly flexed and level, which helps prevent regurgitation and maintains a patent airway in a recumbent patient. Padding also protects pressure points and supports circulation.

Question 26Surgical Nursing

What is the primary purpose of maintaining asepsis during a surgical scrub and gowning procedure?

  1. To sterilize the skin completely
  2. To remove all oils from the surgeon's hands
  3. To reduce the number of microorganisms on hands and forearms before donning sterile attire Correct answer.
  4. To improve the grip on surgical instruments

Explanation

The surgical scrub reduces the microbial population on the hands and forearms and suppresses regrowth, which is the foundation of preventing surgical site infection. It does not sterilize skin, which is impossible.

Question 27Surgical Nursing

A dog undergoing ovariohysterectomy is receiving isoflurane via a rebreathing circuit. Which parameter should be monitored most closely to assess the depth of anesthesia and guide vaporizer adjustment?

  1. Urine specific gravity
  2. Rectal temperature
  3. Capillary refill time
  4. End-tidal inhalant concentration Correct answer.

Explanation

End-tidal inhalant concentration reflects the alveolar and therefore arterial concentration of the anesthetic, so it is the most direct guide to adjusting the vaporizer. Capillary refill time and temperature are supportive but do not indicate anesthetic depth.

Question 28Surgical Nursing

A patient under general anesthesia shows a sudden drop in blood pressure with tachycardia. Which is the most appropriate initial response?

  1. Deepen anesthesia with a bolus of propofol
  2. Increase the vaporizer setting
  3. Reduce the vaporizer setting and assess anesthetic depth and volume status Correct answer.
  4. Administer a second dose of premedication

Explanation

Hypotension with tachycardia suggests excessive anesthetic depth or hypovolemia, so reducing the vaporizer and reassessing depth and volume status is the first step. Deepening anesthesia would worsen cardiovascular depression.

Question 29Surgical Nursing

During a cesarean section, the surgeon requests a suture to close the uterine incision that will hold securely but absorb over weeks. Which choice is most appropriate?

  1. Polyglactin 910 Correct answer.
  2. Polypropylene
  3. Stainless steel
  4. Nylon

Explanation

Polyglactin 910 is an absorbable synthetic suture that maintains strength for several weeks before absorption, appropriate for uterine closure. Nylon, steel, and polypropylene are nonabsorbable and would remain in the tissue.

Question 30Surgical Nursing

A surgical nurse is preparing a patient for a procedure and notices the patient's skin has not been clipped. What is the best practice for surgical site preparation?

  1. Clip the hair with a clipper and then perform an antiseptic scrub Correct answer.
  2. Apply alcohol alone to the skin
  3. Shave the site with a razor immediately before surgery
  4. Leave the hair and scrub over it

Explanation

Clipping with a clipper followed by an antiseptic scrub is preferred because razors cause microabrasions that increase infection risk. The clipped site is then scrubbed with an appropriate antiseptic solution.

Question 31Surgical Nursing

A veterinary technician is asked to calculate a fluid rate for a patient during surgery. The patient weighs 10 kg and the rate ordered is 5 mL/kg/hr. What is the hourly rate?

  1. 5 mL/hr
  2. 500 mL/hr
  3. 50 mL/hr Correct answer.
  4. 15 mL/hr

Explanation

Multiplying 10 kg by 5 mL/kg/hr gives 50 mL/hr. Keeping units consistent avoids decimal errors that can cause fluid overload or under-resuscitation.

Question 32Surgical Nursing

Which instrument is best suited for grasping and holding tissue during surgery while minimizing trauma?

  1. Kelly hemostatic forceps
  2. Babcock forceps Correct answer.
  3. Rongeur
  4. Mayo scissors

Explanation

Babcock forceps have atraumatic jaws that grasp tissue such as bowel without crushing it. Mayo scissors cut tissue, Kelly forceps crush vessels, and rongeurs are used on bone.

Question 33Surgical Nursing

A patient has just undergone abdominal surgery. Which monitoring sign is most important in the immediate postoperative period to detect hemorrhage?

  1. Body temperature alone
  2. Heart rate and blood pressure trends Correct answer.
  3. Mucous membrane color and capillary refill time
  4. Respiratory rate alone

Explanation

Trends in heart rate and blood pressure are the most sensitive early indicators of hemorrhage, as tachycardia and hypotension develop as blood volume is lost. Mucous membrane color and temperature change later.

Question 34Surgical Nursing

During a surgical procedure, the surgeon asks for a suture pattern that apposes tissue edges without crossing them, commonly used for skin closure. Which pattern is described?

  1. Continuous mattress suture
  2. Horizontal mattress suture
  3. Simple interrupted suture Correct answer.
  4. Purse-string suture

Explanation

Simple interrupted sutures appose wound edges individually without crossing the incision line, allowing precise edge alignment and easy removal of individual sutures if needed. Mattress patterns cross the wound and are used for tension.

Question 35Surgical Nursing

A patient is undergoing surgery and the technician notes the patient has a prolonged capillary refill time, pale mucous membranes, and a weak pulse. What is the most appropriate interpretation?

  1. The patient is experiencing pain and needs additional analgesia only
  2. The patient may be experiencing hypovolemia or poor perfusion and needs immediate assessment Correct answer.
  3. The patient is adequately anesthetized and stable
  4. The patient is too deeply anesthetized and needs more anesthetic

Explanation

Pale membranes, prolonged capillary refill, and a weak pulse indicate poor perfusion, often from hypovolemia or cardiovascular depression, and require immediate assessment and intervention. These signs are not consistent with a stable patient.

Question 36Surgical Nursing

Which of the following best describes the purpose of a surgical safety checklist before incision?

  1. To record the final cost of the procedure
  2. To confirm patient identity, procedure, site, and readiness of equipment and team Correct answer.
  3. To replace the anesthesia record
  4. To document the surgeon's credentials

Explanation

A surgical safety checklist verifies patient identity, the correct procedure and site, and that equipment, supplies, and team members are ready before incision, reducing errors. It does not replace anesthesia records or billing documents.

Question 37Surgical Nursing

A veterinary technician must select a suture for closure of the linea alba during a laparotomy. Which property is most important for this closure?

  1. High tensile strength maintained during healing Correct answer.
  2. Rapid absorption within days
  3. Low cost regardless of strength
  4. Maximal elasticity to stretch with the abdomen

Explanation

The linea alba must withstand significant tension during healing, so a suture with high tensile strength that maintains strength for weeks is essential to prevent dehiscence. Rapidly absorbing sutures would fail before healing is complete.

Question 38Surgical Nursing

During a prolonged surgery, a patient's body temperature drops to 35°C. Which consequence is most relevant to anesthetic management?

  1. Increased anesthetic metabolism and faster recovery
  2. Impaired coagulation and prolonged drug effects Correct answer.
  3. Increased heart rate and hypertension
  4. Reduced risk of surgical site infection

Explanation

Hypothermia impairs coagulation and slows drug metabolism, prolonging anesthetic effects and increasing complications. Active warming and monitoring are therefore essential during prolonged procedures.

Question 39Surgical Nursing

A patient with a known cardiac arrhythmia is scheduled for surgery. Which preoperative consideration is most important for the technician to communicate to the surgical team?

  1. The specific arrhythmia and any current medications that may interact with anesthetics Correct answer.
  2. The owner's preferred payment method
  3. The patient's microchip number
  4. The patient's grooming history

Explanation

The specific arrhythmia and current medications are critical because many anesthetics affect cardiac conduction and can interact with antiarrhythmic drugs, requiring tailored monitoring and drug selection. This information directly influences anesthetic safety.

Question 40Surgical Nursing

A surgeon requests a suture that will provide prolonged wound support in a contaminated field while minimizing bacterial harboring. Which characteristic is most important in this selection?

  1. Braided multifilament construction for strength
  2. Rapid absorbability to reduce foreign material
  3. Natural origin for tissue compatibility
  4. Monofilament construction with slow absorption Correct answer.

Explanation

In a contaminated field, a monofilament suture with slow absorption minimizes bacterial harboring in interstices while maintaining wound support during healing. Braided sutures can trap bacteria and increase infection risk.

Question 41Anesthesia and Analgesia

Which agent is most commonly used to premedicate a healthy canine patient for its sedative and opioid-sparing effects prior to induction?

  1. Furosemide
  2. Atropine
  3. Acepromazine Correct answer.
  4. Metoclopramide

Explanation

Acepromazine is a phenothiazine tranquilizer that produces reliable dose-dependent sedation and reduces the amount of induction agent needed. It is a standard premedication in healthy dogs, though it is avoided in patients with significant cardiovascular compromise or seizure history. The other drugs listed serve unrelated roles and are not sedatives.

Question 42Anesthesia and Analgesia

A patient is connected to a rebreathing circuit with a closed pop-off valve. Which complication is most likely if the valve is not reopened promptly?

  1. Hypoxemia from oxygen dilution
  2. Hypothermia from cold gas
  3. Awareness from insufficient agent delivery
  4. Barotrauma from rising airway pressure Correct answer.

Explanation

A closed pop-off valve prevents escape of excess gas, so pressure builds within the circuit and is transmitted to the patient's airways. This can cause pulmonary barotrauma, pneumothorax, and cardiovascular compromise from impaired venous return. The valve must be reopened and the pressure relief verified immediately.

Question 43Anesthesia and Analgesia

Which monitoring parameter provides the earliest reliable indication of inadequate anesthetic depth in a paralyzed patient?

  1. Urine specific gravity
  2. Body temperature
  3. Packed cell volume
  4. Heart rate and blood pressure response Correct answer.

Explanation

When neuromuscular blockade prevents movement, the technician must rely on autonomic signs such as heart rate and blood pressure to gauge depth. A sudden rise in these values during a surgical stimulus suggests the patient is too light. Temperature, urine concentration, and PCV change too slowly to reflect depth.

Question 44Anesthesia and Analgesia

Which inhalant agent has the lowest blood-gas solubility and therefore the fastest induction and recovery?

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

Explanation

Desflurane has the lowest blood-gas partition coefficient of the volatile agents, so equilibration between lungs and blood is rapid. This low solubility produces the fastest induction and recovery. It also requires a heated vaporizer and is not used in every practice.

Question 45Anesthesia and Analgesia

A cat is given an intramuscular injection of ketamine combined with a benzodiazepine. Which effect explains why the benzodiazepine is included in this combination?

  1. It prolongs the analgesic effect of ketamine
  2. It prevents ketamine metabolism in the liver
  3. It reduces ketamine-induced muscle rigidity and provides relaxation Correct answer.
  4. It reverses ketamine if the cat becomes too deep

Explanation

Ketamine alone can produce increased muscle tone and rigidity, particularly at higher doses. Adding a benzodiazepine provides muscle relaxation and smooths the transition, improving the quality of induction. Benzodiazepines do not reverse ketamine or alter its metabolism.

Question 46Anesthesia and Analgesia

Which finding on a preanesthetic physical examination most strongly warrants postponing elective anesthesia in a dog?

  1. A heart rate of 180 beats per minute with pale mucous membranes Correct answer.
  2. A grade I/VI systolic murmur in a quiet older dog
  3. A body condition score of 6/9
  4. Mild tartar accumulation on the molars

Explanation

Marked tachycardia with pale mucous membranes suggests poor perfusion or shock, which must be stabilized before elective anesthesia. Proceeding risks cardiovascular collapse under anesthetic. A soft murmur, mild obesity, and dental tartar are not by themselves reasons to defer an elective procedure.

Question 47Anesthesia and Analgesia

Which analgesic class is most appropriate as part of a multimodal plan for acute postoperative pain in a dog with normal renal and hepatic function?

  1. Anticholinergics
  2. Pure mu-opioid agonists Correct answer.
  3. Loop diuretics
  4. Bronchodilators

Explanation

Pure mu-opioid agonists such as hydromorphone or methadone provide reliable visceral and somatic analgesia and are a cornerstone of acute postoperative pain management. Combining them with NSAIDs or local blocks improves analgesia at lower individual doses. Anticholinergics, diuretics, and bronchodilators are not analgesics.

Question 48Anesthesia and Analgesia

Which NSAID is approved for use in cats but requires attention because of the narrow margin of safety in this species?

  1. Flunixin
  2. Carprofen
  3. Phenylbutazone
  4. Meloxicam Correct answer.

Explanation

Meloxicam is labeled for cats at a specific low dose and must be dosed carefully because cats have limited glucuronidation capacity. Repeated dosing at canine doses can cause renal and gastrointestinal injury. Carprofen, phenylbutazone, and flunixin are not approved for feline use.

Question 49Anesthesia and Analgesia

During anesthesia, a dog's end-tidal CO2 reads 62 mmHg. Which action is most appropriate?

  1. Administer a bolus of atropine
  2. Deepen anesthesia immediately
  3. Lower the vaporizer setting
  4. Assess ventilation and provide assisted or controlled ventilation Correct answer.

Explanation

An end-tidal CO2 of 62 mmHg indicates significant hypercapnia, meaning the patient is not ventilating adequately. The technician should check the airway and circuit, then provide assisted or controlled ventilation to lower CO2. Deepening anesthesia or giving atropine would not correct the underlying hypoventilation.

Question 50Anesthesia and Analgesia

Which statement best describes the purpose of a pulse oximeter during anesthesia?

  1. It measures arterial blood pressure noninvasively
  2. It estimates arterial hemoglobin oxygen saturation Correct answer.
  3. It measures end-tidal anesthetic concentration
  4. It measures cardiac output

Explanation

A pulse oximeter estimates the percentage of hemoglobin saturated with oxygen (SpO2) by comparing light absorption in pulsatile tissue. It is a noninvasive tool for detecting hypoxemia early. It does not measure blood pressure, anesthetic concentration, or cardiac output.