CST Exam 2026 Test Bank 4 | NBSTSA Certified Surgical Technologist 175 Questions with Correct Verified Answers
CST EXAM 2026 TEST BANK 4
NBSTSA Certified Surgical Technologist Certification Exam Prep
With Questions and Correct Verified Answers
175 Comprehensive Questions | Detailed Rationales | 2026/2027 NBSTSA Blueprint Aligned
Component Details
Total Questions 175 Multiple Choice (A-D)
Cognitive Levels 30% Recall, 50% Application, 20% Analysis
Pharmacology, Procedures, Sterilization, Patient Care, Instrumentation,
Content Focus
Emergencies, Professional Practice
Standards NBSTSA CST Blueprint, AORN Guidelines, OSHA, JCAHO
Page 1
,CST Exam 2026 Test Bank 4 | NBSTSA Certified Surgical Technologist 175 Questions with Correct Verified Answers
Section 1: Surgical Pharmacology and Anesthesia
Anesthesia Agents, Emergency Drugs, Medication Safety, and Calculation (Q1-Q25)
Q1: Propofol is selected for induction of general anesthesia in a patient undergoing a
laparoscopic cholecystectomy. Which of the following best describes a key pharmacological
characteristic of propofol?
A. It is a phenol derivative with antiemetic properties, rapid onset within 30-40 seconds,
and quick emergence through redistribution and hepatic metabolism [CORRECT]
**[CORRECT]**
B. It is a barbiturate that provides prolonged postoperative analgesia for 4 to 6 hours
C. It causes sustained tachycardia and hypertension during induction due to sympathetic
stimulation
D. It is contraindicated in all patients with any history of allergic reaction
Correct Answer: A
Rationale: Propofol is a phenol derivative formulated in an egg lecithin and soybean oil emulsion, providing
smooth induction within 30-40 seconds and rapid emergence through redistribution and hepatic conjugation. It
has notable antiemetic properties that reduce postoperative nausea and vomiting. Propofol causes vasodilation
leading to hypotension and bradycardia, not tachycardia. It has no analgesic properties, so opioids must be
administered separately for pain control.
Q2: A trauma patient with suspected sepsis requires emergency surgery. The anesthesia
provider avoids etomidate for induction. What is the primary pharmacological concern with
etomidate in this clinical scenario?
A. Etomidate causes severe bronchospasm in septic patients
B. Etomidate inhibits 11-beta-hydroxylase, causing adrenocortical suppression and
decreased cortisol production [CORRECT] **[CORRECT]**
C. Etomidate triggers malignant hyperthermia in patients with infection
D. Etomidate has an unacceptably slow onset of action exceeding 5 minutes
Correct Answer: B
Rationale: Etomidate inhibits the enzyme 11-beta-hydroxylase in the adrenal cortex, leading to transient
adrenocortical suppression and decreased cortisol synthesis for up to 24 hours. This is particularly concerning
in septic patients who may already have adrenal insufficiency and rely on endogenous cortisol for
hemodynamic stability. Etomidate otherwise provides hemodynamic stability during induction with minimal
cardiovascular depression, making it a controversial but sometimes necessary choice.
Q3: Ketamine is chosen as the induction agent for an unstable trauma patient with hemorrhagic
shock. Which pharmacological property makes ketamine appropriate in this setting?
A. Ketamine decreases heart rate and blood pressure, reducing surgical bleeding
B. Ketamine produces dissociative anesthesia while stimulating the sympathetic nervous
system, helping to maintain blood pressure [CORRECT] **[CORRECT]**
C. Ketamine is the only induction agent that provides muscle relaxation for intubation
D. Ketamine has no effect on intracranial pressure and is safe for head injuries
Correct Answer: B
Rationale: Ketamine produces dissociative anesthesia through NMDA receptor antagonism while stimulating
the sympathetic nervous system, resulting in increased heart rate, blood pressure, and cardiac output. This
sympathetic stimulation makes it valuable for hemodynamically unstable or hypovolemic patients where other
induction agents would cause dangerous hypotension. Ketamine maintains respiratory drive and airway
Page 2
,CST Exam 2026 Test Bank 4 | NBSTSA Certified Surgical Technologist 175 Questions with Correct Verified Answers
reflexes, though it is relatively contraindicated in patients with elevated intracranial pressure as it may increase
cerebral blood flow.
Q4: The anesthesia provider selects sevoflurane for maintenance of general anesthesia. Which
characteristic best explains why sevoflurane is commonly preferred over isoflurane for
inhalation induction in adults?
A. Sevoflurane has a higher blood-gas solubility coefficient than isoflurane, providing deeper
anesthesia
B. Sevoflurane is less pungent than isoflurane, making mask induction better tolerated with
less airway irritation [CORRECT] **[CORRECT]**
C. Sevoflurane does not require a vaporizer for safe administration
D. Sevoflurane is the only volatile agent approved for use in pediatric patients
Correct Answer: B
Rationale: Sevoflurane has a low blood-gas solubility coefficient and is significantly less pungent than
isoflurane or desflurane, allowing smoother mask induction without breath-holding, coughing, or
laryngospasm. Isoflurane is highly pungent and irritates the airway, making mask induction unpleasant.
Sevoflurane also has faster emergence than isoflurane due to its lower solubility. All volatile agents require a
vaporizer for controlled delivery. Both sevoflurane and isoflurane are used in pediatric patients.
Q5: Desflurane is selected for a prolonged neurosurgical procedure requiring rapid emergence
for immediate neurological assessment. What unique equipment requirement does desflurane
have compared to other volatile anesthetics?
A. Desflurane must be administered through a specialized heated and pressurized vaporizer
because its boiling point is near room temperature [CORRECT] **[CORRECT]**
B. Desflurane requires cooling to prevent degradation into toxic compounds
C. Desflurane must be mixed only with nitrous oxide in a fixed-ratio delivery system
D. Desflurane does not require a vaporizer and is injected directly into the circuit
Correct Answer: A
Rationale: Desflurane has a boiling point of approximately 23.5 degrees Celsius, which is very close to room
temperature. This requires a specially designed heated and pressurized vaporizer, such as the Tec 6 or Tec 7, to
maintain consistent vaporization and accurate concentration delivery. Standard variable-bypass vaporizers
cannot accommodate its unique physical properties. Desflurane has the lowest blood-gas solubility of all
volatile agents, providing the fastest emergence, which is advantageous when rapid wake-up for neurological
examination is needed.
Q6: Isoflurane is used for maintenance of general anesthesia during an abdominal procedure.
Which of the following is a characteristic effect of isoflurane on the cardiovascular system?
A. Isoflurane increases systemic vascular resistance and raises blood pressure
B. Isoflurane causes dose-dependent myocardial depression and vasodilation, resulting in
decreased blood pressure [CORRECT] **[CORRECT]**
C. Isoflurane has no effect on heart rate or blood pressure at any concentration
D. Isoflurane stimulates the sympathetic nervous system, causing tachycardia and hypertension
Correct Answer: B
Rationale: Isoflurane produces dose-dependent myocardial depression and peripheral vasodilation, leading to a
decrease in mean arterial pressure. It also sensitizes the myocardium to catecholamines, which is a
consideration when epinephrine is administered. Isoflurane maintains cardiac output better than older agents
like halothane. Unlike halothane, isoflurane does not sensitize the heart to arrhythmias as profoundly.
Understanding the cardiovascular effects of volatile anesthetics is essential for the surgical technologist to
anticipate hemodynamic changes.
Page 3
, CST Exam 2026 Test Bank 4 | NBSTSA Certified Surgical Technologist 175 Questions with Correct Verified Answers
Q7: The surgeon requests a local anesthetic for infiltration prior to closing an abdominal
incision. Lidocaine 1% is selected. What is the maximum recommended dose of lidocaine
without epinephrine for a 70 kg adult patient?
A. 70 mg
B. 490 mg, based on the maximum of 7 mg/kg without epinephrine [CORRECT]
**[CORRECT]**
C. 700 mg, based on the maximum of 10 mg/kg without epinephrine
D. 210 mg, based on the maximum of 3 mg/kg without epinephrine
Correct Answer: B
Rationale: The maximum recommended dose of lidocaine without epinephrine is 7 mg/kg, which for a 70 kg
adult equals 490 mg. When epinephrine is added as a vasoconstrictor, the maximum increases to 7 mg/kg for
infiltration anesthesia. Exceeding these limits risks local anesthetic systemic toxicity (LAST), which presents
with CNS symptoms such as tinnitus, perioral numbness, and metallic taste, progressing to seizures and
cardiovascular collapse. The surgical technologist must be aware of these limits for patient safety during local
anesthetic administration.
Q8: Bupivacaine 0.5% with epinephrine is prepared for a regional block. Why is bupivacaine
considered to have a higher risk profile than lidocaine?
A. Bupivacaine has a slower onset than lidocaine, delaying surgical start
B. Bupivacaine has significantly greater cardiotoxicity, and inadvertent intravascular
injection can cause refractory ventricular arrhythmias [CORRECT] **[CORRECT]**
C. Bupivacaine is only available without a vasoconstrictor
D. Bupivacaine has a shorter duration of action than lidocaine
Correct Answer: B
Rationale: Bupivacaine is highly cardiotoxic compared to other local anesthetics due to its strong binding to
sodium channels in cardiac tissue. Inadvertent intravascular injection can cause ventricular arrhythmias,
widening QRS complexes, and cardiovascular collapse that is difficult to treat. The maximum dose is 3 mg/kg
with epinephrine and 2 mg/kg without. Lipid emulsion 20% is the specific antidote for bupivacaine cardiac
toxicity. Despite this risk, bupivacaine provides prolonged anesthesia of 4 to 8 hours, making it valuable for
postoperative pain management.
Q9: Epinephrine is added to lidocaine for local infiltration during a breast biopsy. What is the
primary mechanism by which epinephrine enhances the local anesthetic effect?
A. Epinephrine directly blocks sodium channels to supplement the anesthetic effect
B. Epinephrine causes local vasoconstriction, reducing systemic absorption and prolonging
the anesthetic duration at the surgical site [CORRECT] **[CORRECT]**
C. Epinephrine increases the speed of onset of the local anesthetic
D. Epinephrine neutralizes the pH of the anesthetic solution for faster tissue penetration
Correct Answer: B
Rationale: Epinephrine is an alpha-adrenergic agonist that causes local vasoconstriction when added to local
anesthetics. This reduces systemic absorption of the anesthetic, allowing higher effective tissue concentrations,
prolonging the duration of action, and reducing the risk of systemic toxicity. The typical concentration used in
local anesthetics is 1:200,000 (5 mcg/mL). Epinephrine should be used cautiously or avoided in areas with
end-arterial blood supply such as fingers, toes, nose, and penis due to the risk of tissue ischemia and necrosis.
Q10: Succinylcholine is administered for rapid sequence intubation in an emergency trauma
case. Which of the following best describes the mechanism of action of succinylcholine?
A. It competitively blocks acetylcholine receptors at the neuromuscular junction without
depolarizing the motor end plate
Page 4
CST EXAM 2026 TEST BANK 4
NBSTSA Certified Surgical Technologist Certification Exam Prep
With Questions and Correct Verified Answers
175 Comprehensive Questions | Detailed Rationales | 2026/2027 NBSTSA Blueprint Aligned
Component Details
Total Questions 175 Multiple Choice (A-D)
Cognitive Levels 30% Recall, 50% Application, 20% Analysis
Pharmacology, Procedures, Sterilization, Patient Care, Instrumentation,
Content Focus
Emergencies, Professional Practice
Standards NBSTSA CST Blueprint, AORN Guidelines, OSHA, JCAHO
Page 1
,CST Exam 2026 Test Bank 4 | NBSTSA Certified Surgical Technologist 175 Questions with Correct Verified Answers
Section 1: Surgical Pharmacology and Anesthesia
Anesthesia Agents, Emergency Drugs, Medication Safety, and Calculation (Q1-Q25)
Q1: Propofol is selected for induction of general anesthesia in a patient undergoing a
laparoscopic cholecystectomy. Which of the following best describes a key pharmacological
characteristic of propofol?
A. It is a phenol derivative with antiemetic properties, rapid onset within 30-40 seconds,
and quick emergence through redistribution and hepatic metabolism [CORRECT]
**[CORRECT]**
B. It is a barbiturate that provides prolonged postoperative analgesia for 4 to 6 hours
C. It causes sustained tachycardia and hypertension during induction due to sympathetic
stimulation
D. It is contraindicated in all patients with any history of allergic reaction
Correct Answer: A
Rationale: Propofol is a phenol derivative formulated in an egg lecithin and soybean oil emulsion, providing
smooth induction within 30-40 seconds and rapid emergence through redistribution and hepatic conjugation. It
has notable antiemetic properties that reduce postoperative nausea and vomiting. Propofol causes vasodilation
leading to hypotension and bradycardia, not tachycardia. It has no analgesic properties, so opioids must be
administered separately for pain control.
Q2: A trauma patient with suspected sepsis requires emergency surgery. The anesthesia
provider avoids etomidate for induction. What is the primary pharmacological concern with
etomidate in this clinical scenario?
A. Etomidate causes severe bronchospasm in septic patients
B. Etomidate inhibits 11-beta-hydroxylase, causing adrenocortical suppression and
decreased cortisol production [CORRECT] **[CORRECT]**
C. Etomidate triggers malignant hyperthermia in patients with infection
D. Etomidate has an unacceptably slow onset of action exceeding 5 minutes
Correct Answer: B
Rationale: Etomidate inhibits the enzyme 11-beta-hydroxylase in the adrenal cortex, leading to transient
adrenocortical suppression and decreased cortisol synthesis for up to 24 hours. This is particularly concerning
in septic patients who may already have adrenal insufficiency and rely on endogenous cortisol for
hemodynamic stability. Etomidate otherwise provides hemodynamic stability during induction with minimal
cardiovascular depression, making it a controversial but sometimes necessary choice.
Q3: Ketamine is chosen as the induction agent for an unstable trauma patient with hemorrhagic
shock. Which pharmacological property makes ketamine appropriate in this setting?
A. Ketamine decreases heart rate and blood pressure, reducing surgical bleeding
B. Ketamine produces dissociative anesthesia while stimulating the sympathetic nervous
system, helping to maintain blood pressure [CORRECT] **[CORRECT]**
C. Ketamine is the only induction agent that provides muscle relaxation for intubation
D. Ketamine has no effect on intracranial pressure and is safe for head injuries
Correct Answer: B
Rationale: Ketamine produces dissociative anesthesia through NMDA receptor antagonism while stimulating
the sympathetic nervous system, resulting in increased heart rate, blood pressure, and cardiac output. This
sympathetic stimulation makes it valuable for hemodynamically unstable or hypovolemic patients where other
induction agents would cause dangerous hypotension. Ketamine maintains respiratory drive and airway
Page 2
,CST Exam 2026 Test Bank 4 | NBSTSA Certified Surgical Technologist 175 Questions with Correct Verified Answers
reflexes, though it is relatively contraindicated in patients with elevated intracranial pressure as it may increase
cerebral blood flow.
Q4: The anesthesia provider selects sevoflurane for maintenance of general anesthesia. Which
characteristic best explains why sevoflurane is commonly preferred over isoflurane for
inhalation induction in adults?
A. Sevoflurane has a higher blood-gas solubility coefficient than isoflurane, providing deeper
anesthesia
B. Sevoflurane is less pungent than isoflurane, making mask induction better tolerated with
less airway irritation [CORRECT] **[CORRECT]**
C. Sevoflurane does not require a vaporizer for safe administration
D. Sevoflurane is the only volatile agent approved for use in pediatric patients
Correct Answer: B
Rationale: Sevoflurane has a low blood-gas solubility coefficient and is significantly less pungent than
isoflurane or desflurane, allowing smoother mask induction without breath-holding, coughing, or
laryngospasm. Isoflurane is highly pungent and irritates the airway, making mask induction unpleasant.
Sevoflurane also has faster emergence than isoflurane due to its lower solubility. All volatile agents require a
vaporizer for controlled delivery. Both sevoflurane and isoflurane are used in pediatric patients.
Q5: Desflurane is selected for a prolonged neurosurgical procedure requiring rapid emergence
for immediate neurological assessment. What unique equipment requirement does desflurane
have compared to other volatile anesthetics?
A. Desflurane must be administered through a specialized heated and pressurized vaporizer
because its boiling point is near room temperature [CORRECT] **[CORRECT]**
B. Desflurane requires cooling to prevent degradation into toxic compounds
C. Desflurane must be mixed only with nitrous oxide in a fixed-ratio delivery system
D. Desflurane does not require a vaporizer and is injected directly into the circuit
Correct Answer: A
Rationale: Desflurane has a boiling point of approximately 23.5 degrees Celsius, which is very close to room
temperature. This requires a specially designed heated and pressurized vaporizer, such as the Tec 6 or Tec 7, to
maintain consistent vaporization and accurate concentration delivery. Standard variable-bypass vaporizers
cannot accommodate its unique physical properties. Desflurane has the lowest blood-gas solubility of all
volatile agents, providing the fastest emergence, which is advantageous when rapid wake-up for neurological
examination is needed.
Q6: Isoflurane is used for maintenance of general anesthesia during an abdominal procedure.
Which of the following is a characteristic effect of isoflurane on the cardiovascular system?
A. Isoflurane increases systemic vascular resistance and raises blood pressure
B. Isoflurane causes dose-dependent myocardial depression and vasodilation, resulting in
decreased blood pressure [CORRECT] **[CORRECT]**
C. Isoflurane has no effect on heart rate or blood pressure at any concentration
D. Isoflurane stimulates the sympathetic nervous system, causing tachycardia and hypertension
Correct Answer: B
Rationale: Isoflurane produces dose-dependent myocardial depression and peripheral vasodilation, leading to a
decrease in mean arterial pressure. It also sensitizes the myocardium to catecholamines, which is a
consideration when epinephrine is administered. Isoflurane maintains cardiac output better than older agents
like halothane. Unlike halothane, isoflurane does not sensitize the heart to arrhythmias as profoundly.
Understanding the cardiovascular effects of volatile anesthetics is essential for the surgical technologist to
anticipate hemodynamic changes.
Page 3
, CST Exam 2026 Test Bank 4 | NBSTSA Certified Surgical Technologist 175 Questions with Correct Verified Answers
Q7: The surgeon requests a local anesthetic for infiltration prior to closing an abdominal
incision. Lidocaine 1% is selected. What is the maximum recommended dose of lidocaine
without epinephrine for a 70 kg adult patient?
A. 70 mg
B. 490 mg, based on the maximum of 7 mg/kg without epinephrine [CORRECT]
**[CORRECT]**
C. 700 mg, based on the maximum of 10 mg/kg without epinephrine
D. 210 mg, based on the maximum of 3 mg/kg without epinephrine
Correct Answer: B
Rationale: The maximum recommended dose of lidocaine without epinephrine is 7 mg/kg, which for a 70 kg
adult equals 490 mg. When epinephrine is added as a vasoconstrictor, the maximum increases to 7 mg/kg for
infiltration anesthesia. Exceeding these limits risks local anesthetic systemic toxicity (LAST), which presents
with CNS symptoms such as tinnitus, perioral numbness, and metallic taste, progressing to seizures and
cardiovascular collapse. The surgical technologist must be aware of these limits for patient safety during local
anesthetic administration.
Q8: Bupivacaine 0.5% with epinephrine is prepared for a regional block. Why is bupivacaine
considered to have a higher risk profile than lidocaine?
A. Bupivacaine has a slower onset than lidocaine, delaying surgical start
B. Bupivacaine has significantly greater cardiotoxicity, and inadvertent intravascular
injection can cause refractory ventricular arrhythmias [CORRECT] **[CORRECT]**
C. Bupivacaine is only available without a vasoconstrictor
D. Bupivacaine has a shorter duration of action than lidocaine
Correct Answer: B
Rationale: Bupivacaine is highly cardiotoxic compared to other local anesthetics due to its strong binding to
sodium channels in cardiac tissue. Inadvertent intravascular injection can cause ventricular arrhythmias,
widening QRS complexes, and cardiovascular collapse that is difficult to treat. The maximum dose is 3 mg/kg
with epinephrine and 2 mg/kg without. Lipid emulsion 20% is the specific antidote for bupivacaine cardiac
toxicity. Despite this risk, bupivacaine provides prolonged anesthesia of 4 to 8 hours, making it valuable for
postoperative pain management.
Q9: Epinephrine is added to lidocaine for local infiltration during a breast biopsy. What is the
primary mechanism by which epinephrine enhances the local anesthetic effect?
A. Epinephrine directly blocks sodium channels to supplement the anesthetic effect
B. Epinephrine causes local vasoconstriction, reducing systemic absorption and prolonging
the anesthetic duration at the surgical site [CORRECT] **[CORRECT]**
C. Epinephrine increases the speed of onset of the local anesthetic
D. Epinephrine neutralizes the pH of the anesthetic solution for faster tissue penetration
Correct Answer: B
Rationale: Epinephrine is an alpha-adrenergic agonist that causes local vasoconstriction when added to local
anesthetics. This reduces systemic absorption of the anesthetic, allowing higher effective tissue concentrations,
prolonging the duration of action, and reducing the risk of systemic toxicity. The typical concentration used in
local anesthetics is 1:200,000 (5 mcg/mL). Epinephrine should be used cautiously or avoided in areas with
end-arterial blood supply such as fingers, toes, nose, and penis due to the risk of tissue ischemia and necrosis.
Q10: Succinylcholine is administered for rapid sequence intubation in an emergency trauma
case. Which of the following best describes the mechanism of action of succinylcholine?
A. It competitively blocks acetylcholine receptors at the neuromuscular junction without
depolarizing the motor end plate
Page 4
