CNOR [CERTIFIED PERIOPERATIVE/OPERATING ROOM NURSE] EXAM – QUESTIONS AND
ANSWERS | VERIFIED AND WELL DETAILED ANSWERS | PLUS RATIONALES | GUARANTEED
PASS | LATEST EXAM UPDATE
| LATEST EXAM UPDATE
Competency Validation
Patient Safety Protocols Aseptic Technique and Sterilization Anesthesia Principles Infection
Control Surgical Patient Assessment Emergency Management in Perioperative Nursing
Pharmacology in Clinical Practice
The purpose of the Certified Perioperative Nurse exam is to validate specialized knowledge,
advanced clinical skills, and professional competence in perioperative nursing practice. This
assessment evaluates comprehensive clinical mastery through a dynamic multiple-choice
and scenario-based structure. It strongly emphasizes real-world application, critical thinking,
and rapid decision-making to ensure optimal patient outcomes and adherence to national
safety standards.
SECTION ONE: QUESTIONS 1–100
1. A perioperative nurse is preparing a patient for a total hip arthroplasty under general
anesthesia. During positioning in the lateral decubitus position, which nerve is most
at risk of injury if the dependent arm is improperly tucked and the axilla is
compressed? A. Radial nerve B. Brachial plexus C. Ulnar nerve D. Obturator nerve
Explanation: Improper positioning of the dependent arm and compression of the
axilla against a roll can stretch or compress the brachial plexus, leading to
postoperative neuropathy such as Erb-palpsey or nerve damage.
2. A surgical technologist sustains a needlestick injury with a suture needle used on a
patient with active hepatitis C. According to standard post-exposure prophylaxis
protocols, what is the immediate first action the individual should take? A.
Immediately report the incident to the employee health department after the case
concludes. B. Immediately wash the puncture site with soap and water and
encourage bleeding. C. Draw a baseline viral load titer before cleaning the wound to
preserve evidence. D. Apply a concentrated bleach solution to the puncture wound
to neutralize bloodborne pathogens. Explanation: The immediate first response
to any sharps injury or blood exposure is to wash the affected area thoroughly with
soap and water. Bleeding should be encouraged gently, while harsh chemicals like
bleach must be avoided.
,3. During an open laparotomy, the surgeon requests a count verification because a
Raytec sponge appears missing. The circulating nurse and scrub person perform an
immediate recount, and the sponge is confirmed missing. What is the mandatory
next step? A. Wait until closure of the fascia before notifying the surgical team. B.
Immediately inform the surgeon and initiate a systematic manual search of the
surgical field, wound, and surrounding floor. C. Document the discrepancy in the
electronic health record and complete the case under the assumption it will be found
on the postoperative radiograph. D. Ask the anesthesia provider to administer a
neuromuscular blocking reversal agent to expedite case termination.
Explanation: When a count discrepancy occurs, the circulating nurse must
immediately inform the surgeon. A comprehensive search of the surgical wound,
field, kick buckets, and surrounding floor must take place before closing any tissue
layers.
4. A patient with a history of malignant hyperthermia (MH) is scheduled for an elective
knee arthroscopy. Which of the following induction agents is absolutely
contraindicated for this patient? A. Propofol B. Midazolam C. Ketamine D.
Succinylcholine Explanation: Succinylcholine, along with volatile halogenated
inhalation anesthetics, is a potent trigger for malignant hyperthermia, causing
uncontrolled skeletal muscle hypermetabolism.
5. A patient undergoes an emergency exploratory laparotomy for a gunshot wound to
the abdomen. Intraoperatively, the patient develops profound hypothermia with a
core temperature of thirty-four degrees Celsius, coagulopathy, and severe metabolic
acidosis. This constellation of clinical findings is known as: A. Systemic inflammatory
response syndrome B. The lethal triad of trauma C. Compartment syndrome D.
Malignant hyperthermia crisis Explanation: The lethal triad of trauma consists of
hypothermia, coagulopathy, and metabolic acidosis, which act synergistically to
worsen patient mortality and must be aggressively managed.
6. Which of the following indicators is utilized to verify that the internal chemical
indicator of a steam sterilization tray has been successfully exposed to all critical
parameters of sterilization, including time, temperature, and steam? A. Class 1
process indicator B. Class 2 specific test indicator C. Class 5 integrating indicator
D. Class 6 emulating indicator Explanation: Class 5 integrating indicators react to
all critical parameters of the steam sterilization cycle (time, temperature, and
presence of steam) over a specific range and correlate closely with biological
indicators.
7. A patient in the PACU exhibits acute stridor, suprasternal retractions, and oxygen
desaturation immediately following extubation after a thyroidectomy. What is the
priority nursing intervention? A. Administer sublingual nitroglycerin to reduce blood
, pressure. B. Immediately notify the anesthesia provider and prepare for re-
intubation or emergency tracheostomy due to possible hematoma or laryngeal
edema. C. Apply a non-rebreather mask at fifteen liters per minute and encourage
deep breathing exercises. D. Administer intravenous furosemide to manage
presumed pulmonary edema. Explanation: Stridor following a thyroidectomy is
an ominous sign of upper airway obstruction caused by bilateral recurrent laryngeal
nerve injury, laryngeal edema, or a expanding surgical hematoma. Immediate airway
management is required.
8. When utilizing an electrosurgical unit (ESU), where should the dispersive electrode
(grounding pad) be placed to minimize the risk of patient electrical burns? A. Over a
bony prominence such as the iliac crest or patella. B. Over a large muscle mass,
close to the surgical site, free of hair, tattoos, and scar tissue. C. Directly over a metal
orthopedic implant to facilitate grounding current return. D. On the patient's upper
back regardless of where the surgical incision is located. Explanation: The
dispersive electrode must be placed on a large, well-perfused muscle mass as close
to the operative site as possible to ensure low impedance, while avoiding bony
prominences, hair, tattoos, and scar tissue.
9. Which of the following pathogens is considered the most resistant to conventional
hospital sterilization and disinfection methods, requiring specialized protocols for
inactivation? A. Pseudomonas aeruginosa B. Prions C. Mycobacterium
tuberculosis D. Hepatitis B virus Explanation: Prions (infectious proteinaceous
particles responsible for Creutzfeldt-Jakob disease) are exceptionally resistant to
standard steam sterilization, chemical disinfection, and enzymatic degradation,
requiring specialized high-temperature and chemical exposure protocols.
10. A patient scheduled for surgery signs the informed consent document but
subsequently expresses confusion about the surgical risks and states they do not
understand the procedure. What is the appropriate role of the perioperative nurse?
A. Explain the surgical risks and alternative treatments to the patient to ensure valid
consent. B. Withhold signing as a witness, notify the surgeon immediately that
the patient requires further clarification, and delay the procedure. C. Proceed with
witnessing the signature because the form has already been filled out by the
physician. D. Ask a family member to explain the procedure and sign on the patient's
behalf. Explanation: The nurse's role as a witness to informed consent validates
that the patient voluntarily signed and appeared competent. If the patient expresses
uncertainty or lack of understanding, the nurse must halt the process and notify the
physician to provide further explanation.
11. During a radical neck dissection, the surgeon accidentally lacerates the internal
jugular vein. The immediate priority action by the circulating nurse is to: A. Prepare
ANSWERS | VERIFIED AND WELL DETAILED ANSWERS | PLUS RATIONALES | GUARANTEED
PASS | LATEST EXAM UPDATE
| LATEST EXAM UPDATE
Competency Validation
Patient Safety Protocols Aseptic Technique and Sterilization Anesthesia Principles Infection
Control Surgical Patient Assessment Emergency Management in Perioperative Nursing
Pharmacology in Clinical Practice
The purpose of the Certified Perioperative Nurse exam is to validate specialized knowledge,
advanced clinical skills, and professional competence in perioperative nursing practice. This
assessment evaluates comprehensive clinical mastery through a dynamic multiple-choice
and scenario-based structure. It strongly emphasizes real-world application, critical thinking,
and rapid decision-making to ensure optimal patient outcomes and adherence to national
safety standards.
SECTION ONE: QUESTIONS 1–100
1. A perioperative nurse is preparing a patient for a total hip arthroplasty under general
anesthesia. During positioning in the lateral decubitus position, which nerve is most
at risk of injury if the dependent arm is improperly tucked and the axilla is
compressed? A. Radial nerve B. Brachial plexus C. Ulnar nerve D. Obturator nerve
Explanation: Improper positioning of the dependent arm and compression of the
axilla against a roll can stretch or compress the brachial plexus, leading to
postoperative neuropathy such as Erb-palpsey or nerve damage.
2. A surgical technologist sustains a needlestick injury with a suture needle used on a
patient with active hepatitis C. According to standard post-exposure prophylaxis
protocols, what is the immediate first action the individual should take? A.
Immediately report the incident to the employee health department after the case
concludes. B. Immediately wash the puncture site with soap and water and
encourage bleeding. C. Draw a baseline viral load titer before cleaning the wound to
preserve evidence. D. Apply a concentrated bleach solution to the puncture wound
to neutralize bloodborne pathogens. Explanation: The immediate first response
to any sharps injury or blood exposure is to wash the affected area thoroughly with
soap and water. Bleeding should be encouraged gently, while harsh chemicals like
bleach must be avoided.
,3. During an open laparotomy, the surgeon requests a count verification because a
Raytec sponge appears missing. The circulating nurse and scrub person perform an
immediate recount, and the sponge is confirmed missing. What is the mandatory
next step? A. Wait until closure of the fascia before notifying the surgical team. B.
Immediately inform the surgeon and initiate a systematic manual search of the
surgical field, wound, and surrounding floor. C. Document the discrepancy in the
electronic health record and complete the case under the assumption it will be found
on the postoperative radiograph. D. Ask the anesthesia provider to administer a
neuromuscular blocking reversal agent to expedite case termination.
Explanation: When a count discrepancy occurs, the circulating nurse must
immediately inform the surgeon. A comprehensive search of the surgical wound,
field, kick buckets, and surrounding floor must take place before closing any tissue
layers.
4. A patient with a history of malignant hyperthermia (MH) is scheduled for an elective
knee arthroscopy. Which of the following induction agents is absolutely
contraindicated for this patient? A. Propofol B. Midazolam C. Ketamine D.
Succinylcholine Explanation: Succinylcholine, along with volatile halogenated
inhalation anesthetics, is a potent trigger for malignant hyperthermia, causing
uncontrolled skeletal muscle hypermetabolism.
5. A patient undergoes an emergency exploratory laparotomy for a gunshot wound to
the abdomen. Intraoperatively, the patient develops profound hypothermia with a
core temperature of thirty-four degrees Celsius, coagulopathy, and severe metabolic
acidosis. This constellation of clinical findings is known as: A. Systemic inflammatory
response syndrome B. The lethal triad of trauma C. Compartment syndrome D.
Malignant hyperthermia crisis Explanation: The lethal triad of trauma consists of
hypothermia, coagulopathy, and metabolic acidosis, which act synergistically to
worsen patient mortality and must be aggressively managed.
6. Which of the following indicators is utilized to verify that the internal chemical
indicator of a steam sterilization tray has been successfully exposed to all critical
parameters of sterilization, including time, temperature, and steam? A. Class 1
process indicator B. Class 2 specific test indicator C. Class 5 integrating indicator
D. Class 6 emulating indicator Explanation: Class 5 integrating indicators react to
all critical parameters of the steam sterilization cycle (time, temperature, and
presence of steam) over a specific range and correlate closely with biological
indicators.
7. A patient in the PACU exhibits acute stridor, suprasternal retractions, and oxygen
desaturation immediately following extubation after a thyroidectomy. What is the
priority nursing intervention? A. Administer sublingual nitroglycerin to reduce blood
, pressure. B. Immediately notify the anesthesia provider and prepare for re-
intubation or emergency tracheostomy due to possible hematoma or laryngeal
edema. C. Apply a non-rebreather mask at fifteen liters per minute and encourage
deep breathing exercises. D. Administer intravenous furosemide to manage
presumed pulmonary edema. Explanation: Stridor following a thyroidectomy is
an ominous sign of upper airway obstruction caused by bilateral recurrent laryngeal
nerve injury, laryngeal edema, or a expanding surgical hematoma. Immediate airway
management is required.
8. When utilizing an electrosurgical unit (ESU), where should the dispersive electrode
(grounding pad) be placed to minimize the risk of patient electrical burns? A. Over a
bony prominence such as the iliac crest or patella. B. Over a large muscle mass,
close to the surgical site, free of hair, tattoos, and scar tissue. C. Directly over a metal
orthopedic implant to facilitate grounding current return. D. On the patient's upper
back regardless of where the surgical incision is located. Explanation: The
dispersive electrode must be placed on a large, well-perfused muscle mass as close
to the operative site as possible to ensure low impedance, while avoiding bony
prominences, hair, tattoos, and scar tissue.
9. Which of the following pathogens is considered the most resistant to conventional
hospital sterilization and disinfection methods, requiring specialized protocols for
inactivation? A. Pseudomonas aeruginosa B. Prions C. Mycobacterium
tuberculosis D. Hepatitis B virus Explanation: Prions (infectious proteinaceous
particles responsible for Creutzfeldt-Jakob disease) are exceptionally resistant to
standard steam sterilization, chemical disinfection, and enzymatic degradation,
requiring specialized high-temperature and chemical exposure protocols.
10. A patient scheduled for surgery signs the informed consent document but
subsequently expresses confusion about the surgical risks and states they do not
understand the procedure. What is the appropriate role of the perioperative nurse?
A. Explain the surgical risks and alternative treatments to the patient to ensure valid
consent. B. Withhold signing as a witness, notify the surgeon immediately that
the patient requires further clarification, and delay the procedure. C. Proceed with
witnessing the signature because the form has already been filled out by the
physician. D. Ask a family member to explain the procedure and sign on the patient's
behalf. Explanation: The nurse's role as a witness to informed consent validates
that the patient voluntarily signed and appeared competent. If the patient expresses
uncertainty or lack of understanding, the nurse must halt the process and notify the
physician to provide further explanation.
11. During a radical neck dissection, the surgeon accidentally lacerates the internal
jugular vein. The immediate priority action by the circulating nurse is to: A. Prepare
