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Alabama LVT practice questions

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Question 1Pharmacy and Pharmacology

Which federal law established the legal distinction between prescription and over-the-counter drugs and required that prescription drugs be dispensed only on the order of a licensed practitioner?

  1. Combat Methamphetamine Epidemic Act of 2005
  2. Food, Drug, and Cosmetic Act of 1938
  3. Durham-Humphrey Amendment of 1951 Correct answer.
  4. Kefauver-Harris Amendment of 1962

Explanation

The Durham-Humphrey Amendment created the prescription-only category and set the requirement that such drugs be dispensed by prescription. The 1938 Act predates this distinction, and Kefauver-Harris addressed proof of efficacy and informed consent.

Question 2Pharmacy and Pharmacology

A drug's official name assigned by the United States Adopted Names Council and used in official compendia is called its:

  1. trade name
  2. proprietary name
  3. nonproprietary name Correct answer.
  4. brand name

Explanation

The nonproprietary (generic) name is the official, non-trademarked designation adopted for a drug. Brand, trade, and proprietary names are synonyms referring to the manufacturer's trademarked product name.

Question 3Pharmacy and Pharmacology

Which abbreviation on a prescription is used to designate the route of administration?

  1. prn
  2. po Correct answer.
  3. ac
  4. qid

Explanation

'po' stands for per os, meaning by mouth, and specifies the route. The other abbreviations describe frequency, conditionality, or timing relative to meals.

Question 4Pharmacy and Pharmacology

A tablet that is scored may be split, but which dosage form should generally never be crushed or split because doing so destroys its release characteristics?

  1. Extended-release tablet Correct answer.
  2. Immediate-release tablet
  3. Effervescent tablet
  4. Chewable tablet

Explanation

Extended-release products rely on a special matrix or coating to control drug release over time; crushing or splitting can cause dose dumping and toxicity. Immediate-release and chewable forms are designed for prompt or chewable administration.

Question 5Pharmacy and Pharmacology

Which route of administration typically produces the most rapid onset of systemic effect?

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

Explanation

Intravenous administration places drug directly into the bloodstream, bypassing absorption and giving the fastest systemic onset. Oral, subcutaneous, and topical routes all require an absorption step that delays onset.

Question 6Pharmacy and Pharmacology

Which organ is the principal site of drug metabolism in the body?

  1. Stomach
  2. Liver Correct answer.
  3. Lung
  4. Kidney

Explanation

The liver contains the highest concentration of cytochrome P450 enzymes and is the primary site of drug biotransformation. The kidney is mainly responsible for excretion of drugs and metabolites.

Question 7Pharmacy and Pharmacology

Which term describes the proportion of an administered dose of drug that reaches systemic circulation unchanged?

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

Explanation

Bioavailability is the fraction of a dose reaching systemic circulation intact, and it is reduced by first-pass metabolism for orally administered drugs. Half-life, volume of distribution, and clearance are separate pharmacokinetic parameters.

Question 8Pharmacy and Pharmacology

A drug has a half-life of 6 hours. Approximately how long will it take to reach steady-state plasma concentrations with repeated dosing at regular intervals?

  1. 12 hours
  2. 48 hours
  3. 6 hours
  4. 24 hours Correct answer.

Explanation

Steady state is generally reached after about four to five half-lives of regular dosing. With a 6-hour half-life, four half-lives equal 24 hours, so steady state is approached in roughly one day.

Question 9Pharmacy and Pharmacology

A patient taking warfarin is prescribed a drug that inhibits cytochrome P450 enzymes. What is the most likely clinical consequence?

  1. Reduced warfarin effect and increased clotting risk
  2. No change because warfarin is renally cleared
  3. Increased warfarin effect and bleeding risk Correct answer.
  4. Immediate elimination of warfarin from the body

Explanation

Warfarin is metabolized by CYP enzymes, so inhibition of those enzymes slows its metabolism and raises plasma levels, increasing anticoagulant effect and bleeding risk. Enzyme inhibition does not accelerate elimination or spare warfarin from metabolism.

Question 10Pharmacy and Pharmacology

Which drug interaction mechanism is illustrated when two drugs compete for the same plasma protein binding sites and one displaces the other?

  1. Protein-binding displacement Correct answer.
  2. Enzyme induction
  3. Renal tubular reabsorption alteration
  4. Pharmacodynamic antagonism

Explanation

Displacement from plasma protein binding raises the free (active) fraction of the displaced drug, which can transiently increase its effect. This is a distribution-phase pharmacokinetic interaction rather than a change in receptor action or metabolism.

Question 11Pharmacy and Pharmacology

A prescription reads 'amoxicillin 500 mg po tid.' How many milligrams will the patient receive in one day?

  1. 500 mg
  2. 1500 mg Correct answer.
  3. 2000 mg
  4. 1000 mg

Explanation

'tid' means three times daily, so 500 mg multiplied by 3 equals 1500 mg per day. The other totals correspond to once, twice, or four times daily dosing.

Question 12Pharmacy and Pharmacology

Which class of drugs acts by inhibiting the enzyme cyclooxygenase and thereby reducing prostaglandin synthesis?

  1. Nonsteroidal anti-inflammatory drugs Correct answer.
  2. Proton pump inhibitors
  3. Angiotensin-converting enzyme inhibitors
  4. Beta-adrenergic blockers

Explanation

NSAIDs inhibit cyclooxygenase, decreasing prostaglandin production and producing analgesic, antipyretic, and anti-inflammatory effects. The other classes act at beta receptors, on the renin-angiotensin system, or on gastric proton pumps.

Question 13Pharmacy and Pharmacology

A veterinary technician must calculate a dose of 0.05 mg/kg for a 20 kg dog using a solution labeled 1 mg/mL. What volume should be drawn up?

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

Explanation

The total dose is 0.05 mg/kg multiplied by 20 kg, which equals 1 mg. At a concentration of 1 mg/mL, 1 mg corresponds to 1.0 mL.

Question 14Pharmacy and Pharmacology

Which pharmacokinetic parameter describes the theoretical volume into which a dose of drug would need to be distributed to produce the observed plasma concentration?

  1. Elimination rate constant
  2. Bioavailability
  3. Clearance
  4. Volume of distribution Correct answer.

Explanation

Volume of distribution is calculated as the amount of drug in the body divided by its plasma concentration and reflects apparent distribution rather than a real anatomic space. Clearance, bioavailability, and the elimination rate constant describe removal or absorption, not apparent distribution.

Question 15Pharmacy and Pharmacology

A drug is described as having a narrow therapeutic index. What does this imply for its clinical use?

  1. Small changes in dose or blood level can cause toxicity Correct answer.
  2. It requires no monitoring of blood concentrations
  3. It is safe across a wide range of plasma concentrations
  4. It cannot be administered by injection

Explanation

A narrow therapeutic index means the toxic concentration is close to the effective concentration, so small dosing errors or interactions can produce toxicity. Such drugs typically require therapeutic drug monitoring.

Question 16Pharmacy and Pharmacology

Which of the following best describes the term 'pharmacodynamics'?

  1. The study of drug manufacturing processes
  2. The study of drug pricing and distribution
  3. The study of what a drug does to the body Correct answer.
  4. The study of what the body does to a drug

Explanation

Pharmacodynamics concerns the biochemical and physiologic effects of drugs and their mechanisms of action. Pharmacokinetics, by contrast, describes absorption, distribution, metabolism, and excretion.

Question 17Pharmacy and Pharmacology

A drug that binds to a receptor and produces a maximal response is best described as a:

  1. Partial agonist
  2. Full agonist Correct answer.
  3. Antagonist
  4. Inverse agonist

Explanation

A full agonist has high intrinsic efficacy and can produce the maximal tissue response. A partial agonist cannot achieve the maximal response even at full receptor occupancy, and antagonists block rather than activate.

Question 18Pharmacy and Pharmacology

A drug that is a competitive antagonist at a receptor will most predictably do which of the following?

  1. Produce a response greater than a full agonist
  2. Shift the agonist dose-response curve to the right Correct answer.
  3. Permanently inactivate the receptor
  4. Increase the maximal response to the agonist

Explanation

Competitive antagonism can be overcome by higher agonist concentrations, which shifts the agonist dose-response curve to the right without reducing the maximum. It does not enhance agonist response or irreversibly bind the receptor.

Question 19Pharmacy and Pharmacology

A dog receiving a drug that undergoes first-pass hepatic metabolism is switched from intravenous to oral administration at the same dose. What is the expected effect?

  1. Higher plasma concentration after oral dosing
  2. Lower plasma concentration after oral dosing Correct answer.
  3. Identical plasma concentration by either route
  4. No absorption of the drug orally

Explanation

Oral drugs must pass through the portal circulation before reaching systemic circulation, so first-pass metabolism reduces the fraction that reaches the bloodstream compared with intravenous dosing. This lowers systemic exposure at an equivalent dose.

Question 20Pharmacy and Pharmacology

Two drugs both act as central nervous system depressants. Administering them together at their usual doses may produce exaggerated sedation. This interaction is best classified as:

  1. Chemical antagonism
  2. Pharmaceutical incompatibility
  3. Pharmacodynamic synergism Correct answer.
  4. Pharmacokinetic antagonism

Explanation

When two drugs act on similar physiologic systems to produce additive or synergistic effects, the interaction is pharmacodynamic. The combined depressant effect exceeds what either drug alone would produce.

Question 21Pharmacy and Pharmacology

A drug is eliminated by zero-order kinetics. What does this mean for its plasma concentration over time?

  1. The drug is not eliminated at all
  2. A constant fraction of the drug is removed per unit time
  3. Elimination rate increases as concentration falls
  4. A constant amount of drug is removed per unit time Correct answer.

Explanation

Zero-order (saturation) kinetics means elimination enzymes are saturated, so a fixed amount of drug is removed per unit time regardless of concentration. First-order kinetics, by contrast, removes a constant fraction.

Question 22Pharmacy and Pharmacology

Which factor most directly explains why a very lipophilic drug may have a large volume of distribution?

  1. High ionization in plasma
  2. Accumulation in adipose and other tissues Correct answer.
  3. Rapid renal filtration
  4. Extensive binding to plasma albumin

Explanation

Lipophilic drugs partition into fat and other tissues, leaving less drug in plasma and producing a large apparent volume of distribution. Extensive plasma protein binding tends to keep drug in the vascular compartment and can reduce apparent distribution.

Question 23Pharmacy and Pharmacology

A prescription for a controlled substance is being evaluated. Which element is required on the prescription for it to be valid as a controlled substance order?

  1. The prescriber's DEA registration number Correct answer.
  2. The drug's manufacturer lot number
  3. The pharmacy's wholesale cost
  4. The patient's weight in kilograms

Explanation

Federal law requires that prescriptions for controlled substances include the prescriber's DEA registration number to establish prescribing authority. Patient weight, lot number, and cost are not required prescription elements.

Question 24Pharmacy and Pharmacology

Which term refers to an unexpected, harmful reaction to a drug that occurs at doses normally used in patients?

  1. Adverse drug reaction Correct answer.
  2. Drug allergy
  3. Medication error
  4. Therapeutic failure

Explanation

An adverse drug reaction is a harmful, unintended response to a drug at normal therapeutic doses. A medication error involves a preventable mistake in prescribing, dispensing, or administration rather than the drug's inherent effect.

Question 25Surgical Nursing and Anesthesia

Which agent is most appropriate for premedication to reduce anxiety and provide mild sedation before anesthesia in an otherwise healthy dog?

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

Explanation

Phenothiazine tranquilizers such as acepromazine are commonly used as preanesthetic sedatives to reduce anxiety and facilitate handling. They produce calm without significant analgesia and are not first-line agents for other purposes listed.

Question 26Surgical Nursing and Anesthesia

A surgical nurse is preparing a patient for an ovariohysterectomy. Which patient preparation step helps reduce the risk of aspiration during anesthesia?

  1. Applying a warm water enema before induction
  2. Fasting the patient for an appropriate period before induction Correct answer.
  3. Shaving the entire abdomen the night before
  4. Withholding all water for 24 hours before surgery

Explanation

An appropriate preoperative fast reduces gastric volume and lowers the risk of regurgitation and aspiration during induction and recovery. Prolonged water restriction and unnecessary procedures are not standard aspiration-prevention measures.

Question 27Surgical Nursing and Anesthesia

Which instrument is best suited for grasping and holding a sterile drape in place during surgery?

  1. Mayo dissecting scissors
  2. Rochester-Carmalt forceps
  3. Backhaus towel clamp Correct answer.
  4. Senn retractor

Explanation

Backhaus towel clamps are designed with sharp curved points to penetrate and secure drapes to the patient. The other instruments serve different functions such as cutting, hemostasis, or retraction.

Question 28Surgical Nursing and Anesthesia

During anesthesia, which parameter is most directly monitored by a pulse oximeter?

  1. End-tidal carbon dioxide
  2. Arterial blood pressure
  3. Hemoglobin oxygen saturation Correct answer.
  4. Body temperature

Explanation

A pulse oximeter estimates the percentage of hemoglobin saturated with oxygen (SpO2) using light absorption. It does not measure carbon dioxide, blood pressure, or temperature.

Question 29Surgical Nursing and Anesthesia

Which suture material is classified as non-absorbable and is commonly used for skin closure?

  1. Chromic catgut
  2. Nylon Correct answer.
  3. Poliglecaprone 25
  4. Polyglactin 910

Explanation

Nylon is a synthetic non-absorbable suture often used for skin closure because it maintains tensile strength and is removed after healing. The other listed materials are absorbable.

Question 30Surgical Nursing and Anesthesia

What is the primary purpose of maintaining a surgical patient on a warm water blanket or forced-air warmer during a lengthy procedure?

  1. To speed the absorption of inhalant anesthetic
  2. To reduce the need for analgesic drugs
  3. To prevent hypothermia and its associated complications Correct answer.
  4. To sterilize the surgical field continuously

Explanation

Prolonged anesthesia impairs thermoregulation, so active warming prevents hypothermia, which can cause coagulopathy, delayed recovery, and cardiac arrhythmias. Warming does not sterilize the field or substitute for analgesia.

Question 31Surgical Nursing and Anesthesia

Which phase of wound healing is characterized by the formation of granulation tissue and fibroblast activity?

  1. Hemostasis phase
  2. Proliferative phase Correct answer.
  3. Maturation phase
  4. Inflammatory phase

Explanation

The proliferative phase follows inflammation and involves fibroblast proliferation, angiogenesis, and granulation tissue formation. Hemostasis and inflammation precede it, and maturation involves remodeling.

Question 32Surgical Nursing and Anesthesia

Which of the following best describes the purpose of a surgical hand scrub before donning sterile gloves?

  1. To reduce transient and resident microbial flora on the hands and forearms Correct answer.
  2. To soften the skin so gloves fit more tightly
  3. To sterilize the hands completely for the entire procedure
  4. To provide a residual barrier that replaces sterile gloves

Explanation

A surgical scrub reduces both transient and resident microorganisms on the hands and forearms to lower contamination risk. It does not achieve complete sterilization and does not replace sterile gloves.

Question 33Surgical Nursing and Anesthesia

A dog under isoflurane anesthesia shows a sudden decrease in respiratory rate and depth with rising end-tidal CO2. What is the most appropriate initial action?

  1. Administer a bolus of intravenous crystalloid fluid
  2. Increase the vaporizer setting to deepen anesthesia
  3. Assist or control ventilation and reassess the anesthetic depth Correct answer.
  4. Turn off the oxygen supply to the circuit

Explanation

Hypoventilation with rising end-tidal CO2 indicates inadequate ventilation, so manual or mechanical ventilation should be provided while reassessing depth and the cause. Deepening anesthesia would worsen hypoventilation, and oxygen must never be discontinued.

Question 34Surgical Nursing and Anesthesia

A cat is recovering from anesthesia and remains laterally recumbent with a temperature of 36.0°C (96.8°F). Which action is most appropriate?

  1. Apply active warming measures and monitor temperature and mentation Correct answer.
  2. Administer an additional dose of ketamine for sedation
  3. Withhold all fluids until the temperature normalizes
  4. Place the patient in a dark, quiet cage without monitoring

Explanation

Postanesthetic hypothermia should be corrected with active warming while monitoring temperature, mentation, and vital signs. Sedation would impair recovery, and withholding monitoring or fluids is inappropriate.

Question 35Surgical Nursing and Anesthesia

A surgical nurse is calculating a drug dose for a 12 kg dog when the order reads 0.05 mg/kg. What is the total dose?

  1. 6 mg
  2. 1.2 mg
  3. 0.6 mg Correct answer.
  4. 0.06 mg

Explanation

Multiply the dose by body weight: 0.05 mg/kg × 12 kg = 0.6 mg. Careful unit alignment prevents tenfold dosing errors.

Question 36Surgical Nursing and Anesthesia

Which statement best describes the role of a cuffed endotracheal tube in small animal anesthesia?

  1. The cuff seals the trachea to deliver gas and reduce aspiration risk Correct answer.
  2. The cuff anchors the tube to the tongue for stability
  3. The cuff measures end-tidal carbon dioxide directly
  4. The cuff heats and humidifies inspired gases

Explanation

An inflated cuff creates a seal against the tracheal wall, allowing positive pressure ventilation and reducing the risk of aspiration of oral or gastric contents. It does not measure gases or humidify air.

Question 37Surgical Nursing and Anesthesia

A patient is undergoing abdominal surgery and the surgeon requests a self-retaining retractor to hold the abdominal wall edges apart. Which instrument is most appropriate?

  1. Adson forceps
  2. Scalpel handle with a #10 blade
  3. Balfour retractor Correct answer.
  4. Olsen-Hegar needle holder

Explanation

The Balfour retractor is a self-retaining abdominal retractor designed to hold the abdominal incision open. The other instruments are for tissue handling, cutting, or suturing.

Question 38Surgical Nursing and Anesthesia

Which monitoring finding most strongly suggests that anesthetic depth is becoming too light during a surgical procedure?

  1. Decreased respiratory rate and pale mucous membranes
  2. Pinpoint pupils and muscle relaxation
  3. Decreased heart rate and blood pressure
  4. Increased jaw tone and limb withdrawal Correct answer.

Explanation

Increasing jaw tone, purposeful movement, and withdrawal reflexes indicate the patient is lightening under anesthesia. Decreased heart rate, blood pressure, and respiratory rate more often reflect excessive depth.

Question 39Surgical Nursing and Anesthesia

Which analgesic approach is most appropriate as part of a multimodal pain management plan for a patient undergoing orthopedic surgery?

  1. Using a single high-dose opioid alone
  2. Withholding analgesia until the patient shows overt pain
  3. Administering an NSAID only after the patient refuses to eat
  4. Combining an opioid with an NSAID and a local anesthetic block Correct answer.

Explanation

Multimodal analgesia combines agents acting at different points in the pain pathway, such as opioids, NSAIDs, and local anesthetics, to improve pain control and reduce individual drug doses. Single-agent or reactive approaches are less effective.

Question 40Surgical Nursing and Anesthesia

During surgery a patient's mucous membranes become pale and the capillary refill time lengthens to more than 2 seconds. What is the most appropriate interpretation?

  1. Sign of excessive oxygen delivery
  2. Normal finding consistent with adequate anesthesia
  3. Indication to increase the vaporizer setting
  4. Possible hypoperfusion and need to assess blood pressure and perfusion Correct answer.

Explanation

Pale membranes and prolonged capillary refill time suggest poor peripheral perfusion, prompting assessment of blood pressure, heart rate, and fluid status. These are not normal findings, and deepening anesthesia would worsen perfusion.

Question 41Surgical Nursing and Anesthesia

Which suture pattern is best described as a continuous pattern that inverts tissue edges, commonly used for closing hollow organs such as the bladder?

  1. Horizontal mattress pattern
  2. Figure-eight pattern
  3. Cushing pattern Correct answer.
  4. Simple interrupted pattern

Explanation

The Cushing pattern is a continuous inverting suture used to appose and invert tissue edges, often for hollow organs. Simple interrupted, horizontal mattress, and figure-eight patterns are not inverting patterns.

Question 42Surgical Nursing and Anesthesia

A patient requires a short procedure and the veterinarian selects a dissociative agent for induction. Which agent is a dissociative anesthetic?

  1. Diazepam
  2. Ketamine Correct answer.
  3. Glycopyrrolate
  4. Propofol

Explanation

Ketamine is a dissociative anesthetic that produces a cataleptic state and is often combined with a benzodiazepine or other agent. Propofol is a nonbarbiturate induction agent, diazepam is a benzodiazepine, and glycopyrrolate is an anticholinergic.

Question 43Surgical Nursing and Anesthesia

Which action is most important when placing a patient on a circulating warm water blanket during anesthesia?

  1. Ensure the blanket is covered and the patient is monitored to prevent thermal burns Correct answer.
  2. Turn the blanket off immediately after induction
  3. Position the blanket only over the thorax
  4. Place the patient directly on the hottest setting without a cover

Explanation

Warming devices should be used with a protective cover and monitoring to avoid thermal injury, especially in anesthetized patients unable to respond to heat. Direct contact at high settings risks burns.

Question 44Surgical Nursing and Anesthesia

A surgeon plans to close a highly tensioned skin incision. Which technique best helps distribute tension and reduce the risk of dehiscence?

  1. Closing only the subcutaneous layer and leaving skin open
  2. Using absorbable suture for skin without support
  3. Placing tension-relieving sutures in addition to routine closure Correct answer.
  4. Using a single simple interrupted suture at the center

Explanation

Tension-relieving sutures distribute force across the closure and reduce tension on the primary incision, lowering dehiscence risk. Single sutures or unsupported closures do not address tension.

Question 45Surgical Nursing and Anesthesia

Which finding on a capnography waveform most directly indicates that the endotracheal tube may be misplaced in the esophagus?

  1. Elevated end-tidal carbon dioxide above 60 mmHg
  2. Absent or near-zero end-tidal carbon dioxide Correct answer.
  3. A gradual increase in inspired carbon dioxide
  4. A prolonged expiratory plateau

Explanation

Esophageal intubation produces little or no exhaled carbon dioxide, so the capnograph shows absent or near-zero values. Elevated or plateau patterns reflect ventilation rather than esophageal placement.

Question 46Surgical Nursing and Anesthesia

During anesthesia a patient develops a sudden bradyarrhythmia with hypotension after administration of a high-dose opioid. Which intervention is most appropriate?

  1. Reduce the administered opioid effect and support heart rate as directed Correct answer.
  2. Place the patient in dorsal recumbency without other intervention
  3. Increase the inhalant concentration
  4. Administer an additional opioid dose

Explanation

Opioid-induced bradycardia and hypotension are managed by reducing or reversing the opioid effect and supporting cardiovascular function with appropriate agents as directed. Additional opioid or deeper anesthesia would worsen the condition.

Question 47Surgical Nursing and Anesthesia

A patient with a suspected diaphragmatic hernia is being anesthetized for repair. Why is positive pressure ventilation often necessary in this situation?

  1. Positive pressure prevents surgical hemorrhage
  2. Abdominal organs in the thorax impair normal ventilation and lung expansion Correct answer.
  3. The patient cannot metabolize inhalant anesthetics
  4. It eliminates the need for monitoring oxygenation

Explanation

Displaced abdominal organs reduce thoracic volume and lung expansion, so positive pressure ventilation supports oxygenation and ventilation during repair. It does not affect drug metabolism or replace monitoring.

Question 48Surgical Nursing and Anesthesia

Which principle best explains why the surgical team should minimize unnecessary conversation and movement in the operating room?

  1. Conversation alters the patient's anesthetic depth
  2. Airborne and contact contamination risk increases with activity and traffic Correct answer.
  3. Movement improves the action of the vaporizer
  4. Talking increases the patient's heart rate directly

Explanation

Excessive talking and movement increase airborne and contact contamination and disrupt the sterile field, raising infection risk. They do not directly affect anesthetic depth or heart rate.

Question 49Surgical Nursing and Anesthesia

A patient undergoing a long procedure has received large volumes of crystalloid. Which monitoring change best suggests fluid overload rather than hypovolemia?

  1. Increasing respiratory effort or crackles with a rising central venous pressure Correct answer.
  2. Falling blood pressure with tachycardia
  3. Decreasing heart rate with pale mucous membranes
  4. Prolonged capillary refill time with weak pulses

Explanation

Fluid overload can present with respiratory difficulty, pulmonary crackles, and rising central venous pressure as the vascular and pulmonary systems become congested. The other findings suggest hypovolemia.

Question 50Surgical Nursing and Anesthesia

Which instrument is designed to hold a sterile drape securely to the patient's skin at the margin of the surgical field?

  1. Needle holder
  2. Mayo scissors
  3. Backhaus towel forceps Correct answer.
  4. Towel clamp

Explanation

Backhaus towel forceps have sharp, curved penetrating points that grip drapes and skin to keep the sterile field fixed in place. They are placed at the drape margins and are not used for tissue handling.