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Question 1Pharmacy and Pharmacology

A veterinary prescription label reads 'Give 1 tablet SID.' How often should the client administer the medication?

  1. Three times daily
  2. Every other day
  3. Twice daily
  4. Once daily Correct answer.

Explanation

SID is an abbreviation of the Latin semel in die, meaning once per day. It is the standard pharmacy shorthand for daily dosing, while BID, TID, and EOD indicate twice daily, three times daily, and every other day respectively.

Question 2Pharmacy and Pharmacology

Which route of administration places a drug directly into the systemic circulation, making it the preferred choice when a rapid effect is needed in an emergency?

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

Explanation

An intravenous injection delivers drug straight into the bloodstream, bypassing both absorption from tissue and first-pass hepatic metabolism, so plasma levels rise immediately. Subcutaneous and intramuscular doses must first be absorbed from the injection site, and oral doses are slower still and subject to hepatic first-pass effects.

Question 3Pharmacy and Pharmacology

A dog is presented with salivation, miosis, vomiting, and bradycardia after exposure to an organophosphate insecticide. Which drug is given to block the muscarinic effects of the accumulated acetylcholine?

  1. N-acetylcysteine
  2. Naloxone
  3. Vitamin K1
  4. Atropine Correct answer.

Explanation

Organophosphates inhibit acetylcholinesterase, allowing acetylcholine to accumulate at receptors and produce SLUD signs plus bradycardia. Atropine competitively blocks muscarinic receptors and controls those effects, while pralidoxime is used to reactivate the enzyme at nicotinic sites.

Question 4Pharmacy and Pharmacology

A 20 kg dog is prescribed amoxicillin at 15 mg/kg by mouth twice daily. The oral suspension is labeled 50 mg/mL. How many milliliters make up one dose?

  1. 3 mL
  2. 6 mL Correct answer.
  3. 12 mL
  4. 1.5 mL

Explanation

First multiply body weight by the dose: 20 kg x 15 mg/kg = 300 mg per dose. Then divide by the concentration: 300 mg divided by 50 mg/mL equals 6 mL per dose.

Question 5Pharmacy and Pharmacology

A dog on long-term prednisone is prescribed carprofen for osteoarthritis. Why is concurrent use of a corticosteroid and an NSAID a concern?

  1. Both drugs impair prostaglandin-mediated mucosal protection, raising the risk of gastrointestinal ulceration Correct answer.
  2. The corticosteroid increases renal excretion of the NSAID, causing subtherapeutic levels
  3. The corticosteroid chemically inactivates the NSAID in the stomach
  4. The NSAID blocks hepatic metabolism of the corticosteroid, causing adrenal suppression

Explanation

NSAIDs inhibit cyclooxygenase and corticosteroids inhibit phospholipase A2, so both reduce prostaglandin synthesis; prostaglandins are needed for gastric mucosal protection and for maintaining renal perfusion. Combining them markedly increases the risk of gastrointestinal ulceration and renal injury, so the combination is generally avoided.

Question 6Pharmacy and Pharmacology

Enrofloxacin is generally avoided in growing dogs primarily because of which adverse effect?

  1. Damage to articular cartilage in weight-bearing joints Correct answer.
  2. Cochlear toxicity resulting in permanent deafness
  3. Glutathione depletion causing hepatic necrosis
  4. Bone marrow suppression with pancytopenia

Explanation

Fluoroquinolones such as enrofloxacin cause cartilage lesions in juvenile animals, so label directions restrict their use in growing dogs of large breeds. High doses in cats also carry a risk of retinopathy, which is a separate species-specific concern.

Question 7Pharmacy and Pharmacology

Which instruction should accompany a dispensed bottle of doxycycline suspension for a dog?

  1. Store the bottle in the freezer between doses
  2. Give each dose together with an aluminum-containing antacid
  3. Mix each dose into a calcium-rich meal to limit gastric upset
  4. Protect the product from light and give it apart from dairy products Correct answer.

Explanation

Tetracyclines are photodegradable and chelate divalent and trivalent cations, so they should be protected from light and separated from dairy, antacids, and mineral supplements. Giving those products at the same time binds the drug and reduces its absorption.

Question 8Pharmacy and Pharmacology

Under AMDUCA, which requirement must be met before a veterinarian may use a drug in an extra-label manner in a food-producing animal?

  1. The drug must be dispensed by a licensed pharmacist rather than the veterinarian
  2. A valid veterinarian-client-patient relationship must exist Correct answer.
  3. The withdrawal period must be established as zero before slaughter
  4. The drug must be approved for that species and for that exact indication

Explanation

Extra-label drug use in food animals requires a valid veterinarian-client-patient relationship, a determination that no approved product is available for the condition, and an extended withdrawal time supported by scientific information. The drug must also not be a specifically prohibited compound such as chloramphenicol.

Question 9Pharmacy and Pharmacology

A drug has a half-life of 8 hours and is given at a constant dosing interval. Approximately how long does it take to reach steady-state plasma concentrations?

  1. 8 hours
  2. 16 hours
  3. 40 hours Correct answer.
  4. 24 hours

Explanation

Steady state is generally reached after about four to five half-lives of repeated dosing at a constant interval. With an 8-hour half-life, five half-lives equals 40 hours, which is when accumulation and elimination balance.

Question 10Pharmacy and Pharmacology

A collie develops tremors, ataxia, and hypersalivation after receiving ivermectin. Which mechanism best explains this reaction?

  1. Reduced renal clearance caused by concurrent dehydration and prerenal azotemia
  2. Reduced P-glycoprotein efflux at the blood-brain barrier from an ABCB1 mutation Correct answer.
  3. IgE-mediated hypersensitivity to the drug after prior sensitization
  4. Hepatic cytochrome P450 induction generating a reactive toxic metabolite

Explanation

P-glycoprotein, encoded by the ABCB1 (MDR1) gene, pumps many drugs out of the central nervous system at the blood-brain barrier. Dogs with the mutant allele accumulate ivermectin in brain tissue and show neurologic signs at doses that other dogs tolerate.

Question 11Pharmacy and Pharmacology

Which DEA controlled-substance schedule includes drugs that have a high potential for abuse and no currently accepted medical use in the United States?

  1. Schedule III
  2. Schedule II
  3. Schedule IV
  4. Schedule I Correct answer.

Explanation

The DEA assigns controlled substances to five schedules based on abuse potential and accepted medical use. Schedule I drugs, such as heroin and LSD, have no currently accepted medical use in the United States and cannot be prescribed. Schedule II through V drugs have recognized medical uses with decreasing abuse potential.

Question 12Pharmacy and Pharmacology

A vial of veterinary insulin is in use at the clinic. Where should it be stored between doses?

  1. In a warm water bath before each use
  2. In the freezer to prevent degradation
  3. In the refrigerator, above freezing Correct answer.
  4. At room temperature on a sunny shelf

Explanation

Insulin is a protein hormone that loses potency if frozen or exposed to high temperatures. An in-use vial should be kept in the refrigerator, above freezing, and never placed in the freezer or a warm environment. Rolling the vial gently rather than shaking it also helps preserve the molecule.

Question 13Pharmacy and Pharmacology

Which term describes the branch of pharmacology that studies what the body does to a drug, including absorption, distribution, metabolism, and excretion?

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

Explanation

Pharmacokinetics describes the movement and fate of a drug in the body: absorption, distribution, metabolism, and excretion. Pharmacodynamics, by contrast, describes what the drug does to the body. The two terms are often remembered as what the body does to the drug versus what the drug does to the body.

Question 14Pharmacy and Pharmacology

A 12 kg dog is prescribed metoclopramide at 0.4 mg/kg IV every 8 hours. The vial contains 5 mg/mL. How many milliliters should be given per dose?

  1. 0.96 mL Correct answer.
  2. 2.4 mL
  3. 1.2 mL
  4. 0.48 mL

Explanation

First multiply the dose by the patient's weight: 0.4 mg/kg × 12 kg = 4.8 mg per dose. Then divide by the concentration: 4.8 mg ÷ 5 mg/mL = 0.96 mL. The every-8-hour interval affects the schedule but not the volume of a single dose.

Question 15Pharmacy and Pharmacology

Which NSAID is a COX-2 selective agent approved for use in dogs?

  1. Ketoprofen
  2. Aspirin
  3. Deracoxib Correct answer.
  4. Phenylbutazone

Explanation

Deracoxib is a coxib-class NSAID that preferentially inhibits COX-2 and is approved for dogs. COX-2 selectivity reduces, but does not eliminate, the risk of gastrointestinal ulceration. Ketoprofen, aspirin, and phenylbutazone are nonselective COX inhibitors.

Question 16Pharmacy and Pharmacology

A cat receiving oral metronidazole may develop which adverse effect that warrants stopping the drug and contacting the veterinarian?

  1. Severe constipation
  2. Retinal degeneration and blindness
  3. Irreversible hearing loss
  4. Ataxia and nystagmus Correct answer.

Explanation

Metronidazole can cause dose-related neurotoxicity in cats, most often presenting as ataxia, nystagmus, head tilt, or seizures. These signs usually resolve after the drug is discontinued, but the veterinarian should be notified promptly. Cats clear metronidazole more slowly than dogs, so prolonged or high-dose therapy increases risk.

Question 17Pharmacy and Pharmacology

Which antibiotic is a lincosamide that should be avoided in rabbits because it can disrupt cecal flora and cause fatal enterotoxemia?

  1. Clindamycin Correct answer.
  2. Enrofloxacin
  3. Trimethoprim-sulfamethoxazole
  4. Oxytetracycline

Explanation

Rabbits rely on cecal fermentation, and orally administered lincosamides such as clindamycin can kill normal gram-positive cecal bacteria. Overgrowth of Clostridium species may follow, producing enterotoxins and fatal enterotoxemia. For this reason, clindamycin is avoided in rabbits and other hindgut fermenters.

Question 18Pharmacy and Pharmacology

A 15 kg dog is receiving a lidocaine constant rate infusion at 50 µg/kg/min. The fluid bag contains lidocaine at 2 mg/mL. What volume per hour should the infusion pump deliver?

  1. 11.25 mL/hr
  2. 22.5 mL/hr Correct answer.
  3. 45 mL/hr
  4. 90 mL/hr

Explanation

Convert the dose to an hourly rate: 50 µg/kg/min × 15 kg × 60 min/hr = 45,000 µg/hr, or 45 mg/hr. Divide by the bag concentration: 45 mg/hr ÷ 2 mg/mL = 22.5 mL/hr. Setting the pump to 22.5 mL/hr delivers the prescribed CRI.

Question 19Pharmacy and Pharmacology

Which explanation best describes why a drug with extensive first-pass hepatic metabolism has low oral bioavailability?

  1. Plasma protein binding traps the drug within the gut lumen
  2. The kidneys excrete the drug unchanged before it can act
  3. The molecule is too large to cross the intestinal wall
  4. Hepatic metabolism occurs before systemic absorption Correct answer.

Explanation

First-pass metabolism occurs when ingested drug is absorbed into portal blood and passes through the liver before reaching the systemic circulation. Extensive hepatic extraction reduces the fraction of the dose that reaches target tissues, lowering oral bioavailability. This is why some drugs require a higher oral dose or an alternative route.

Question 20Pharmacy and Pharmacology

A dog is receiving gentamicin. Which monitoring parameter is most important for detecting early nephrotoxicity?

  1. Packed cell volume and platelet count
  2. Serum creatinine and urine specific gravity Correct answer.
  3. Blood glucose and fructosamine
  4. Total bilirubin and liver enzymes

Explanation

Aminoglycosides such as gentamicin are eliminated by the kidney and can cause acute tubular injury. Monitoring serum creatinine and urine specific gravity helps detect reduced renal function and loss of urine concentrating ability before severe damage occurs. Concurrent use of other nephrotoxic drugs or prolonged therapy increases the risk.

Question 21Pharmacy and Pharmacology

A veterinary prescription label includes the abbreviation "PRN" after the dose. How should the client interpret this instruction?

  1. Administer the medication until the bottle is empty
  2. Administer the medication only when needed Correct answer.
  3. Administer the medication with each meal
  4. Administer the medication at a fixed time each day

Explanation

PRN stands for pro re nata, meaning "as needed," so the medication is not given on a fixed schedule. The technician should ensure the client understands the specific situation that calls for a dose and any maximum daily frequency set by the veterinarian. This differs from scheduled instructions such as daily dosing or giving with food.

Question 22Pharmacy and Pharmacology

During recovery, a dog that received an opioid premedication develops marked respiratory depression and sedation. Which reversal agent should the veterinary technician anticipate administering?

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

Explanation

Naloxone is a competitive opioid antagonist that reverses opioid-induced sedation and respiratory depression. Atropine is an anticholinergic, flumazenil reverses benzodiazepines, and yohimbine is used to reverse alpha-2 adrenergic agonists. The technician should also provide supportive care and monitor ventilation while the reversal agent takes effect.

Question 23Pharmacy and Pharmacology

A dog stabilized on digoxin is diagnosed with vomiting and has a serum potassium concentration of 2.8 mEq/L. Which interpretation is most appropriate?

  1. The low potassium is expected to reduce digoxin's cardiac effects
  2. The potassium level has no bearing on digoxin safety
  3. The low potassium increases the risk of digoxin toxicity Correct answer.
  4. The low potassium protects against digoxin toxicity

Explanation

Hypokalemia increases digoxin binding to sodium-potassium ATPase and raises the risk of digitalis toxicity, especially when vomiting may also affect hydration and drug absorption. The veterinary team should monitor electrolytes, renal values, and clinical signs and contact the veterinarian about adjusting therapy. Potassium should not be assumed to protect against toxicity.

Question 24Surgical Nursing

Which statement best describes the purpose of the surgical hand scrub before gowning and gloving?

  1. It sterilizes the skin of the hands and forearms so that surgical gloves are unnecessary.
  2. It is performed only when the surgical gloves have visible holes or tears.
  3. It removes all bacterial spores from the hands and forearms before surgery begins.
  4. It reduces both transient and resident skin flora to lower the risk of contaminating the surgical field. Correct answer.

Explanation

A surgical hand scrub with an antiseptic agent reduces transient and resident skin flora, which lowers the chance of wound contamination. It does not sterilize the skin, and sterile gloves are still required after scrubbing. Bacterial spores are not reliably eliminated by routine scrub agents.

Question 25Surgical Nursing

Which instrument is a curved hemostatic forceps with a ratchet that is used to grasp and occlude small vessels?

  1. Senn retractor
  2. Kelly forceps Correct answer.
  3. Babcock forceps
  4. Metzenbaum scissors

Explanation

Kelly forceps have curved jaws and a ratcheted handle that allow the surgeon to clamp and occlude small vessels during surgery. Metzenbaum scissors are for cutting delicate tissue, Babcock forceps are atraumatic tissue forceps, and a Senn retractor is used to hold tissue edges apart.

Question 26Surgical Nursing

Which suture material is classified as absorbable?

  1. Polyglactin 910 Correct answer.
  2. Polypropylene
  3. Silk
  4. Nylon

Explanation

Polyglactin 910 is a synthetic absorbable suture that loses tensile strength over time and is broken down by the body. Nylon and polypropylene are nonabsorbable synthetic sutures, and silk is classified as a nonabsorbable suture material.

Question 27Surgical Nursing

During anesthesia, the capnograph suddenly shows a flat line with an end-tidal CO2 of zero. Which is the most likely cause?

  1. Sodium bicarbonate administration
  2. Increased cardiac output
  3. Disconnection of the endotracheal tube from the breathing circuit Correct answer.
  4. Malignant hyperthermia

Explanation

A sudden loss of the capnogram with end-tidal CO2 near zero means that exhaled CO2 is not reaching the sensor. The most common causes are airway disconnection, esophageal intubation, or a large circuit leak. Malignant hyperthermia, increased cardiac output, and bicarbonate administration do not produce an abrupt zero reading.

Question 28Surgical Nursing

Which action is correct when clipping hair from a surgical site?

  1. Shave the site with a razor immediately before surgery to reduce skin irritation.
  2. Clip the hair away from the incision edges and vacuum loose hair before applying antiseptic. Correct answer.
  3. Clip the hair against the direction of growth toward the incision line.
  4. Apply the antiseptic before clipping so that the hair is disinfected first.

Explanation

Clipping away from the incision edges and removing loose hair reduces contamination of the surgical field. Clipping toward the incision can deposit hair and debris into the wound, and razors can cause microabrasions that increase infection risk. Antiseptic skin preparation should follow clipping, not precede it.

Question 29Surgical Nursing

Which item indicates that a surgical pack has been exposed to the sterilization process but does not confirm that sterilization was achieved?

  1. Package seal integrity check
  2. Bowie-Dick test
  3. External chemical indicator tape Correct answer.
  4. Biological spore test

Explanation

External chemical indicator tape changes color after exposure to heat or steam, showing that the pack was processed, but it does not prove that sterilization conditions were lethal to microorganisms. A biological spore test provides the strongest verification of sterilization efficacy. Package seal integrity checks confirm closure, not exposure or sterility.

Question 30Surgical Nursing

A dog recovering from anesthesia has a rectal temperature of 96°F (35.6°C). What is the most appropriate action?

  1. Begin active warming and notify the veterinarian. Correct answer.
  2. Administer atropine to increase the heart rate.
  3. No action is needed because this is a normal post-anesthetic temperature.
  4. Place the dog in a cold cage to prevent overheating.

Explanation

A temperature of 96°F (35.6°C) is moderate hypothermia and can impair recovery, coagulation, and cardiovascular function. Active warming with a forced-air blanket or warm fluids and notification of the veterinarian are appropriate. Normal canine temperature is approximately 100.5°F to 102.5°F.

Question 31Surgical Nursing

A small bleeding vessel has been grasped with a mosquito hemostat. What is the next step to achieve permanent hemostasis?

  1. Pack the area with gauze and leave the gauze in place.
  2. Apply a tourniquet proximal to the limb.
  3. Ligate the vessel with suture or use electrocautery as directed by the veterinarian. Correct answer.
  4. Release the hemostat after 5 seconds and apply a bandage.

Explanation

When a bleeding vessel has been grasped, definitive hemostasis is achieved by ligating the vessel with suture or by electrocautery, following the veterinarian's direction. Brief release or packing may temporarily control capillary bleeding but does not reliably seal a grasped vessel. A tourniquet is not appropriate for a small isolated vessel in most surgical sites.

Question 32Surgical Nursing

A dog with gastric dilatation-volvulus is being stabilized for surgery. Which preoperative measure is most important before induction?

  1. Delay gastric decompression until the abdomen is opened.
  2. Withhold all IV fluids until after surgery.
  3. Administer oral activated charcoal before induction.
  4. Decompress the stomach and establish IV access for fluid resuscitation. Correct answer.

Explanation

Gastric dilatation-volvulus causes impaired venous return and shock, so the patient needs gastric decompression and intravenous fluid resuscitation before anesthesia. Oral activated charcoal is not appropriate in a patient with a distended, obstructed stomach and vomiting risk. Decompression should not be delayed until surgery.

Question 33Surgical Nursing

During a cesarean section in a bitch, which action best minimizes anesthetic exposure to the fetuses?

  1. Give additional ketamine just before the first puppy is extracted.
  2. Delay delivery for 10 minutes after induction to allow the drug to clear.
  3. Minimize the interval between induction and delivery and use a balanced anesthetic protocol. Correct answer.
  4. Maintain a deep plane of anesthesia until all puppies are delivered.

Explanation

Fetal anesthetic exposure is reduced by keeping the induction-to-delivery interval short and by using a balanced protocol with drugs that have favorable placental transfer profiles. Deep anesthesia and additional boluses increase fetal depression and prolong recovery. Delaying delivery allows more drug to reach the fetuses.

Question 34Surgical Nursing

During fine dissection near the facial nerve of a dog, the surgeon asks for scissors intended for delicate tissue cutting rather than for cutting dense fascia. Which instrument should the technician pass?

  1. Lister bandage scissors
  2. Suture removal scissors
  3. Mayo dissecting scissors
  4. Metzenbaum scissors Correct answer.

Explanation

Metzenbaum scissors have long shanks with short, slender blades and are designed for fine dissection of fragile tissue, which is why they suit work near the facial nerve. Mayo dissecting scissors carry heavier, thicker blades meant for dense tissue such as fascia and are too blunt for this purpose.

Question 35Surgical Nursing

A dog is scheduled for an exploratory celiotomy through a ventral midline approach. How should the patient be positioned on the surgery table?

  1. Left lateral recumbency with the dependent lung field padded
  2. Sternal recumbency with the forelimbs pulled cranially
  3. Standing in a sling with the abdomen clipped and draped
  4. Dorsal recumbency with the limbs secured Correct answer.

Explanation

A ventral midline incision requires the linea alba to face upward, so the patient is placed in dorsal recumbency with the limbs tied out to the table rails. Securing the limbs prevents the patient from sliding and allows the table to be tilted to shift viscera away from the incision.

Question 36Surgical Nursing

A technician has completed the surgical hand scrub and donned a sterile surgical gown. Which method is standard for applying the sterile gloves?

  1. Open gloving, because the outside of the gloves is sterile
  2. Open gloving, because it is faster when working alone
  3. Open gloving, because the gown cuffs are sterile once the gown is on
  4. Closed gloving, with the hands kept inside the gown cuffs Correct answer.

Explanation

After gowning, closed gloving is used: the hands remain inside the gown cuffs and the glove is rolled over the cuff, so bare skin never contacts the sterile exterior of the glove. Open gloving is reserved for situations in which only gloves, not a sterile gown, are required.

Question 37Surgical Nursing

During skin closure with a curved cutting needle, where should the needle holder jaws grasp the needle?

  1. One third of the needle length from the swaged end Correct answer.
  2. Over the swaged end so the jaws also grip the suture material
  3. At the very tip so the needle enters tissue at a controlled angle
  4. At the midpoint of the curved needle shaft for balanced pressure

Explanation

The needle holder should grasp the needle about one third of its length from the swaged end, which lies between the middle and the point. This position leaves the distal curve free to drive through tissue without bending the needle or crushing the swage where the suture is attached.

Question 38Surgical Nursing

During anesthesia the reservoir bag is nearly empty and the patient's oxygen saturation is drifting downward while the vaporizer setting is unchanged. Which immediate action is most appropriate?

  1. Increase the vaporizer setting by two percent and keep watching the saturation trend
  2. Open the oxygen flush valve and check the circuit for leaks or disconnection Correct answer.
  3. Turn the patient to the other lateral side and reposition the pulse oximeter probe
  4. Clamp the scavenging hose and squeeze the reservoir bag to test the pop-off valve

Explanation

An emptying reservoir bag with falling saturation suggests the circuit is not being filled, either from a leak, a disconnection, or inadequate fresh gas flow. The oxygen flush valve rapidly refills the bag while the anesthetist inspects the circuit, and manual ventilation with 100% oxygen can be started if the patient is hypoventilating.

Question 39Surgical Nursing

A contaminated flank wound in a dog will be closed over a drain and managed with repeated wound flushing. Which skin closure is most appropriate?

  1. A simple continuous pattern tied with a buried knot
  2. A continuous intradermal pattern using absorbable monofilament
  3. A purse-string continuous pattern through all skin layers
  4. An interrupted pattern using monofilament nonabsorbable suture Correct answer.

Explanation

Interrupted sutures allow the clinician to remove individual sutures and open part of the wound for drainage or lavage without disrupting the entire closure. Monofilament nonabsorbable suture also harbors less bacteria and is well tolerated in contaminated tissue.

Question 40Surgical Nursing

A Penrose drain has been placed in a dog after surgery on an infected wound. Which statement about this drain is correct?

  1. It is an active drain connected to a closed suction canister that is emptied every eight hours
  2. It should be clamped for the first twelve hours and then opened so drainage can begin
  3. It should be sutured in place at the incision line to prevent the bandage from dislodging it
  4. It is a passive drain that exits through a separate stab incision Correct answer.

Explanation

A Penrose drain is a passive latex drain that relies on gravity and capillary action, so it must exit through a separate stab incision rather than the primary wound to keep the closure sealed. It is covered with a sterile absorbent bandage that is changed as often as it becomes saturated, and an Elizabethan collar protects it from the patient.

Question 41Surgical Nursing

During closure of a ventral midline celiotomy in a dog, which layer must be securely apposed to minimize the risk of incisional dehiscence?

  1. The peritoneum alone, using a continuous pattern
  2. The transverse abdominal muscle, separately from its fascia
  3. The linea alba (external rectus sheath) Correct answer.
  4. The skin and subcutaneous fat only

Explanation

The linea alba is the strong aponeurotic union of the rectus sheaths and is the load-bearing layer of the ventral abdominal wall. Failure to incorporate it, or sutures that tear through it, is the usual cause of suture-line failure and evisceration after celiotomy.

Question 42Surgical Nursing

While the surgeon applies traction to an ovarian pedicle, an anesthetized dog's heart rate abruptly falls from 95 to 38 beats per minute and blood pressure drops. What is the most appropriate immediate response?

  1. Release the traction and give an anticholinergic such as atropine Correct answer.
  2. Increase the vaporizer setting and begin manual ventilation of the lungs
  3. Deepen the anesthesia and continue the traction at a slower, steadier pace
  4. Give a rapid intravenous bolus of crystalloids and continue the surgery

Explanation

Traction on the ovarian pedicle and mesentery can trigger a vagovagal reflex producing profound bradycardia and hypotension. The first step is to stop the traction, which often restores the heart rate immediately; an anticholinergic such as atropine or glycopyrrolate is given if the bradycardia persists or recurs.

Question 43Surgical Nursing

Four hours after a splenectomy, a dog has pale mucous membranes, a heart rate of 160 beats per minute, and weak femoral pulses. Which action is most appropriate?

  1. Reduce the IV fluid rate and recheck the mucous membrane color in one hour
  2. Give an NSAID for presumed postoperative pain and reassess in thirty minutes
  3. Leave the dog undisturbed in the cage to recover quietly from anesthesia
  4. Check the PCV/TP and abdominal girth and notify the surgeon Correct answer.

Explanation

Tachycardia, pale mucous membranes, and weak pulses after splenectomy point to hypovolemia from ongoing hemorrhage. Serial PCV/TP and abdominal assessment help quantify blood loss, and the surgeon must be informed because repeat surgery plus colloid or blood support may be required.

Question 44Surgical Nursing

Which instrument is designed to secure a sterile surgical drape to the patient's skin at the start of a procedure?

  1. Olsen-Hegar needle holder
  2. Senn hand-held retractor
  3. Backhaus towel clamp Correct answer.
  4. Mayo dissecting scissors

Explanation

Backhaus towel clamps have sharp, curved tips that penetrate the drape and the patient's skin to hold the sterile field in place. Scissors, needle holders, and retractors serve other functions and are not designed to secure drapes.

Question 45Surgical Nursing

A healthy dog undergoes an elective ovariohysterectomy through a ventral midline incision. The uterus and ovaries are removed without entering the gastrointestinal, respiratory, or genitourinary tract, and no infection is present. How is this surgical wound classified?

  1. Contaminated
  2. Dirty
  3. Clean Correct answer.
  4. Clean-contaminated

Explanation

An elective procedure that does not enter a hollow viscus and has no signs of infection is classified as a clean wound. Clean-contaminated wounds involve controlled entry into a hollow organ, while contaminated and dirty wounds involve significant spillage or established infection.

Question 46Dentistry

How many permanent teeth does a clinically normal adult dog have?

  1. 30
  2. 42 Correct answer.
  3. 28
  4. 44

Explanation

The permanent dental formula of the dog is 2 x (I 3/3, C 1/1, P 4/4, M 2/3), which adds up to 42 adult teeth. Cats have 30 permanent teeth, and the deciduous dog dentition contains 28 teeth that are later replaced. Counts outside these values suggest retained deciduous teeth, missing teeth, or supernumerary teeth.

Question 47Dentistry

In the Triadan numbering system, which permanent quadrant does the 200 series represent?

  1. Maxillary left Correct answer.
  2. Mandibular right
  3. Mandibular left
  4. Maxillary right

Explanation

In the Triadan system the first digit identifies the quadrant and the last two digits identify tooth position from the midline, so 201 is the maxillary left central incisor. The permanent series run 100 for maxillary right, 200 for maxillary left, 300 for mandibular left and 400 for mandibular right. Deciduous teeth use the 500 through 800 series.

Question 48Dentistry

Why is the tooth surface polished after calculus removal during a professional dental cleaning?

  1. To flatten the cusps and reduce occlusal wear
  2. To smooth enamel and slow plaque reattachment Correct answer.
  3. To remove the superficial enamel layer
  4. To bleach the tooth surface for cosmetic effect

Explanation

Scaling leaves microscopic scratches and debris on enamel and cementum, and polishing with a low-speed prophy cup and abrasive paste smooths these defects. A smoother surface slows the reattachment and maturation of the plaque biofilm, which is why polishing follows scaling. Polishing does not whiten teeth, intentionally strip enamel, or alter the occlusion.

Question 49Dentistry

Periodontal probing of a dog's maxillary fourth premolar shows roughly 30 percent attachment loss, with no furcation exposure and no mobility. Which periodontal stage does this represent?

  1. Stage 4
  2. Stage 1
  3. Stage 3 Correct answer.
  4. Stage 2

Explanation

Veterinary periodontal staging uses the percentage of attachment loss: stage 1 is gingivitis without attachment loss, stage 2 is less than 25 percent, stage 3 is 25 to 50 percent, and stage 4 exceeds 50 percent with possible furcation exposure and mobility. Thirty percent attachment loss therefore falls into stage 3, which typically requires periodontal therapy such as open root planing or extraction of the affected tooth.

Question 50Dentistry

When an intraoral dental radiograph is taken with the bisecting angle technique, the central x-ray beam is directed perpendicular to what structure?

  1. A fixed 45-degree line at the root apex
  2. The plane of the imaging sensor
  3. The bisector of the tooth-sensor angle Correct answer.
  4. The long axis of the tooth

Explanation

In the bisecting angle technique the central beam is aimed perpendicular to an imaginary line that bisects the angle formed by the tooth's long axis and the imaging sensor. This produces a true-length image even though the sensor cannot be placed parallel to the tooth in most positions, and angulation errors cause elongation or foreshortening. The parallel technique is reserved for sites such as the mandibular premolars and molars where the sensor can sit parallel to the tooth.