CNOR Perioperative Nursing Practice Exam Study Guide Updated 2026
| Verified Questions and Answers with Detailed Rationales |
Preoperative Assessment and Patient Preparation, Intraoperative
Nursing Care, Sterile Technique and Asepsis, Surgical Instrumentation
and Equipment, Anesthesia Considerations, Positioning and Safety,
Infection Prevention and Control, Postoperative Care and Recovery,
Surgical Procedures and Specialty Areas, AORN Standards and
Guidelines, NCLEX and CNOR-Style Clinical Judgment Questions |
Complete Exam Prep Resource for CNOR Certification Success
Question 1: Which of the following is the PRIMARY responsibility of the
perioperative nurse during the preoperative phase?
A. Administering anesthesia medications
B. Verifying the surgical site and procedure with the patient
C. Performing the surgical procedure
D. Documenting intraoperative vital signs
CORRECT ANSWER: B. Verifying the surgical site and procedure with the patient
RATIONALE: The perioperative nurse's primary responsibility during the preoperative
phase is to ensure patient safety through verification processes, including confirming
the correct patient, procedure, and surgical site per The Joint Commission's Universal
Protocol. This prevents wrong-site, wrong-procedure, and wrong-person surgery.
Anesthesia administration is performed by qualified anesthesia providers, surgical
procedures are performed by surgeons, and intraoperative documentation occurs
during surgery, not preoperatively.
Question 2: When positioning a patient in the lithotomy position for a gynecological
procedure, which nerve is MOST at risk for injury due to improper leg support?
A. Radial nerve
B. Ulnar nerve
C. Common peroneal nerve
D. Sciatic nerve
CORRECT ANSWER: C. Common peroneal nerve
RATIONALE: The common peroneal nerve is particularly vulnerable in the lithotomy
position because it wraps around the fibular head and can be compressed against
stirrups or leg supports. Improper padding or excessive leg abduction can cause
neuropraxia, resulting in foot drop. The radial and ulnar nerves are more at risk in supine
or prone positions with arm extension, while the sciatic nerve is at greater risk in the
prone or jackknife position.
Question 3: Which sterilization method is MOST appropriate for heat-sensitive,
moisture-sensitive surgical instruments such as fiber-optic endoscopes?
,A. Steam sterilization (autoclave)
B. Ethylene oxide gas sterilization
C. Flash sterilization
D. Boiling water disinfection
CORRECT ANSWER: B. Ethylene oxide gas sterilization
RATIONALE: Ethylene oxide (EtO) gas sterilization is ideal for heat-sensitive and
moisture-sensitive items because it operates at low temperatures (typically 30-60°C)
and does not require moisture. Steam sterilization and flash sterilization use high heat
and moisture that can damage delicate instruments. Boiling water is a disinfection
method, not sterilization, and does not achieve the sterility assurance level required for
critical items entering sterile body cavities.
Question 4: During an intraoperative cardiac arrest, which action should the
perioperative nurse prioritize FIRST?
A. Call for additional help and activate the emergency response
B. Begin chest compressions immediately
C. Prepare defibrillator pads and settings
D. Administer epinephrine per protocol
CORRECT ANSWER: A. Call for additional help and activate the emergency
response
RATIONALE: According to Advanced Cardiac Life Support (ACLS) and perioperative
emergency protocols, the first priority during any intraoperative emergency is to activate
the emergency response system to mobilize the full code team. While chest
compressions are critical, they should be initiated simultaneously or immediately after
calling for help in a team environment. The perioperative setting has unique resources,
and rapid team activation ensures coordinated resuscitation efforts with appropriate
personnel and equipment.
Question 5: Which of the following best describes the purpose of the surgical time-
out as defined by the Universal Protocol?
A. To confirm patient insurance information before incision
B. To verify correct patient, procedure, site, and implants immediately before incision
C. To allow the surgeon to review the surgical technique with the team
D. To document preoperative medications in the electronic health record
CORRECT ANSWER: B. To verify correct patient, procedure, site, and implants
immediately before incision
RATIONALE: The surgical time-out, mandated by The Joint Commission's Universal
Protocol, is a standardized pause performed immediately before the initial incision to
actively verify the correct patient, procedure, surgical site, laterality, and any necessary
implants or special equipment. This final verification step is critical for preventing
wrong-site surgery and enhancing team communication. Insurance verification and
,medication documentation occur during preoperative preparation, not during the time-
out.
Question 6: A patient undergoing surgery develops malignant hyperthermia. Which
medication should the perioperative nurse anticipate administering FIRST?
A. Dantrolene sodium
B. Sodium bicarbonate
C. Furosemide
D. Insulin with dextrose
CORRECT ANSWER: A. Dantrolene sodium
RATIONALE: Dantrolene sodium is the specific antidote for malignant hyperthermia
and must be administered immediately upon suspicion of the condition. It works by
inhibiting calcium release from the sarcoplasmic reticulum in skeletal muscle, halting
the hypermetabolic state. While sodium bicarbonate may be used to correct acidosis,
furosemide for myoglobinuria prevention, and insulin/dextrose for hyperkalemia
management, dantrolene is the priority intervention to stop the underlying
pathophysiology.
Question 7: Which principle of sterile technique is violated if a sterile gown sleeve
touches a non-sterile surface during donning?
A. Sterile items must remain above waist level
B. Sterile fields must be continuously monitored
C. Sterile to sterile contact only; contamination occurs with non-sterile contact
D. Only the front of the gown from chest to waist is considered sterile
CORRECT ANSWER: C. Sterile to sterile contact only; contamination occurs with
non-sterile contact
RATIONALE: The fundamental principle of sterile technique states that sterile items
may only contact other sterile items; any contact with non-sterile surfaces results in
contamination. When a sterile gown sleeve touches a non-sterile surface, that area of
the gown is considered contaminated and must be addressed before proceeding. While
options A, B, and D describe valid sterile technique principles, the direct violation in this
scenario is the breach of sterile-to-sterile contact only.
Question 8: During a laparoscopic cholecystectomy, the surgeon requests
conversion to an open procedure. What is the perioperative nurse's BEST initial
action?
A. Immediately prepare additional open surgical instruments
B. Notify the circulating nurse to document the conversion
C. Confirm the request with the surgeon and communicate to the entire team
D. Retrieve the open procedure cart from storage
, CORRECT ANSWER: C. Confirm the request with the surgeon and communicate to
the entire team
RATIONALE: Effective communication and team coordination are paramount during
procedural changes. The perioperative nurse should first confirm the surgeon's request
to ensure clarity, then immediately communicate the conversion to all team members
to facilitate coordinated preparation of instruments, equipment, and personnel. While
preparing instruments and documentation are important, they follow after clear team
communication to prevent errors and delays during the critical transition.
Question 9: Which assessment finding in the immediate post-anesthesia care unit
(PACU) requires the MOST urgent intervention?
A. Patient reports mild incisional pain rated 3/10
B. Oxygen saturation of 92% on room air
C. Systolic blood pressure of 90 mmHg with heart rate of 110 bpm
D. Patient is drowsy but responds to verbal stimuli
CORRECT ANSWER: C. Systolic blood pressure of 90 mmHg with heart rate of 110
bpm
RATIONALE: A systolic blood pressure of 90 mmHg with tachycardia (heart rate 110
bpm) suggests possible hypovolemia, hemorrhage, or early shock, which requires
immediate assessment and intervention to prevent deterioration. Mild pain, oxygen
saturation of 92% (which may be acceptable depending on baseline), and drowsiness
with responsiveness are expected post-anesthesia findings that require monitoring but
are not immediately life-threatening. Hypotension with compensatory tachycardia is a
red flag for hemodynamic instability.
Question 10: When counting surgical sponges, which practice BEST ensures
accuracy and patient safety?
A. Counting sponges only at the end of the procedure
B. Having one nurse count aloud while another verifies visually
C. Using sponges with radiopaque markers only for abdominal cases
D. Documenting the count after the patient leaves the operating room
CORRECT ANSWER: B. Having one nurse count aloud while another verifies visually
RATIONALE: The recommended practice for surgical counts is a simultaneous visual
and auditory count performed by two qualified personnel (typically the scrub and
circulating nurses) to minimize human error. This two-person verification system is a
critical safety measure to prevent retained surgical items. Counts should occur at
multiple intervals (before procedure, before cavity closure, at skin closure, and at staff
relief), not just at the end. Radiopaque markers aid detection if retained but do not
replace accurate counting, and documentation must occur before patient transfer.
Question 11: Which of the following is the MOST effective strategy to prevent
surgical site infections (SSIs) in perioperative practice?
| Verified Questions and Answers with Detailed Rationales |
Preoperative Assessment and Patient Preparation, Intraoperative
Nursing Care, Sterile Technique and Asepsis, Surgical Instrumentation
and Equipment, Anesthesia Considerations, Positioning and Safety,
Infection Prevention and Control, Postoperative Care and Recovery,
Surgical Procedures and Specialty Areas, AORN Standards and
Guidelines, NCLEX and CNOR-Style Clinical Judgment Questions |
Complete Exam Prep Resource for CNOR Certification Success
Question 1: Which of the following is the PRIMARY responsibility of the
perioperative nurse during the preoperative phase?
A. Administering anesthesia medications
B. Verifying the surgical site and procedure with the patient
C. Performing the surgical procedure
D. Documenting intraoperative vital signs
CORRECT ANSWER: B. Verifying the surgical site and procedure with the patient
RATIONALE: The perioperative nurse's primary responsibility during the preoperative
phase is to ensure patient safety through verification processes, including confirming
the correct patient, procedure, and surgical site per The Joint Commission's Universal
Protocol. This prevents wrong-site, wrong-procedure, and wrong-person surgery.
Anesthesia administration is performed by qualified anesthesia providers, surgical
procedures are performed by surgeons, and intraoperative documentation occurs
during surgery, not preoperatively.
Question 2: When positioning a patient in the lithotomy position for a gynecological
procedure, which nerve is MOST at risk for injury due to improper leg support?
A. Radial nerve
B. Ulnar nerve
C. Common peroneal nerve
D. Sciatic nerve
CORRECT ANSWER: C. Common peroneal nerve
RATIONALE: The common peroneal nerve is particularly vulnerable in the lithotomy
position because it wraps around the fibular head and can be compressed against
stirrups or leg supports. Improper padding or excessive leg abduction can cause
neuropraxia, resulting in foot drop. The radial and ulnar nerves are more at risk in supine
or prone positions with arm extension, while the sciatic nerve is at greater risk in the
prone or jackknife position.
Question 3: Which sterilization method is MOST appropriate for heat-sensitive,
moisture-sensitive surgical instruments such as fiber-optic endoscopes?
,A. Steam sterilization (autoclave)
B. Ethylene oxide gas sterilization
C. Flash sterilization
D. Boiling water disinfection
CORRECT ANSWER: B. Ethylene oxide gas sterilization
RATIONALE: Ethylene oxide (EtO) gas sterilization is ideal for heat-sensitive and
moisture-sensitive items because it operates at low temperatures (typically 30-60°C)
and does not require moisture. Steam sterilization and flash sterilization use high heat
and moisture that can damage delicate instruments. Boiling water is a disinfection
method, not sterilization, and does not achieve the sterility assurance level required for
critical items entering sterile body cavities.
Question 4: During an intraoperative cardiac arrest, which action should the
perioperative nurse prioritize FIRST?
A. Call for additional help and activate the emergency response
B. Begin chest compressions immediately
C. Prepare defibrillator pads and settings
D. Administer epinephrine per protocol
CORRECT ANSWER: A. Call for additional help and activate the emergency
response
RATIONALE: According to Advanced Cardiac Life Support (ACLS) and perioperative
emergency protocols, the first priority during any intraoperative emergency is to activate
the emergency response system to mobilize the full code team. While chest
compressions are critical, they should be initiated simultaneously or immediately after
calling for help in a team environment. The perioperative setting has unique resources,
and rapid team activation ensures coordinated resuscitation efforts with appropriate
personnel and equipment.
Question 5: Which of the following best describes the purpose of the surgical time-
out as defined by the Universal Protocol?
A. To confirm patient insurance information before incision
B. To verify correct patient, procedure, site, and implants immediately before incision
C. To allow the surgeon to review the surgical technique with the team
D. To document preoperative medications in the electronic health record
CORRECT ANSWER: B. To verify correct patient, procedure, site, and implants
immediately before incision
RATIONALE: The surgical time-out, mandated by The Joint Commission's Universal
Protocol, is a standardized pause performed immediately before the initial incision to
actively verify the correct patient, procedure, surgical site, laterality, and any necessary
implants or special equipment. This final verification step is critical for preventing
wrong-site surgery and enhancing team communication. Insurance verification and
,medication documentation occur during preoperative preparation, not during the time-
out.
Question 6: A patient undergoing surgery develops malignant hyperthermia. Which
medication should the perioperative nurse anticipate administering FIRST?
A. Dantrolene sodium
B. Sodium bicarbonate
C. Furosemide
D. Insulin with dextrose
CORRECT ANSWER: A. Dantrolene sodium
RATIONALE: Dantrolene sodium is the specific antidote for malignant hyperthermia
and must be administered immediately upon suspicion of the condition. It works by
inhibiting calcium release from the sarcoplasmic reticulum in skeletal muscle, halting
the hypermetabolic state. While sodium bicarbonate may be used to correct acidosis,
furosemide for myoglobinuria prevention, and insulin/dextrose for hyperkalemia
management, dantrolene is the priority intervention to stop the underlying
pathophysiology.
Question 7: Which principle of sterile technique is violated if a sterile gown sleeve
touches a non-sterile surface during donning?
A. Sterile items must remain above waist level
B. Sterile fields must be continuously monitored
C. Sterile to sterile contact only; contamination occurs with non-sterile contact
D. Only the front of the gown from chest to waist is considered sterile
CORRECT ANSWER: C. Sterile to sterile contact only; contamination occurs with
non-sterile contact
RATIONALE: The fundamental principle of sterile technique states that sterile items
may only contact other sterile items; any contact with non-sterile surfaces results in
contamination. When a sterile gown sleeve touches a non-sterile surface, that area of
the gown is considered contaminated and must be addressed before proceeding. While
options A, B, and D describe valid sterile technique principles, the direct violation in this
scenario is the breach of sterile-to-sterile contact only.
Question 8: During a laparoscopic cholecystectomy, the surgeon requests
conversion to an open procedure. What is the perioperative nurse's BEST initial
action?
A. Immediately prepare additional open surgical instruments
B. Notify the circulating nurse to document the conversion
C. Confirm the request with the surgeon and communicate to the entire team
D. Retrieve the open procedure cart from storage
, CORRECT ANSWER: C. Confirm the request with the surgeon and communicate to
the entire team
RATIONALE: Effective communication and team coordination are paramount during
procedural changes. The perioperative nurse should first confirm the surgeon's request
to ensure clarity, then immediately communicate the conversion to all team members
to facilitate coordinated preparation of instruments, equipment, and personnel. While
preparing instruments and documentation are important, they follow after clear team
communication to prevent errors and delays during the critical transition.
Question 9: Which assessment finding in the immediate post-anesthesia care unit
(PACU) requires the MOST urgent intervention?
A. Patient reports mild incisional pain rated 3/10
B. Oxygen saturation of 92% on room air
C. Systolic blood pressure of 90 mmHg with heart rate of 110 bpm
D. Patient is drowsy but responds to verbal stimuli
CORRECT ANSWER: C. Systolic blood pressure of 90 mmHg with heart rate of 110
bpm
RATIONALE: A systolic blood pressure of 90 mmHg with tachycardia (heart rate 110
bpm) suggests possible hypovolemia, hemorrhage, or early shock, which requires
immediate assessment and intervention to prevent deterioration. Mild pain, oxygen
saturation of 92% (which may be acceptable depending on baseline), and drowsiness
with responsiveness are expected post-anesthesia findings that require monitoring but
are not immediately life-threatening. Hypotension with compensatory tachycardia is a
red flag for hemodynamic instability.
Question 10: When counting surgical sponges, which practice BEST ensures
accuracy and patient safety?
A. Counting sponges only at the end of the procedure
B. Having one nurse count aloud while another verifies visually
C. Using sponges with radiopaque markers only for abdominal cases
D. Documenting the count after the patient leaves the operating room
CORRECT ANSWER: B. Having one nurse count aloud while another verifies visually
RATIONALE: The recommended practice for surgical counts is a simultaneous visual
and auditory count performed by two qualified personnel (typically the scrub and
circulating nurses) to minimize human error. This two-person verification system is a
critical safety measure to prevent retained surgical items. Counts should occur at
multiple intervals (before procedure, before cavity closure, at skin closure, and at staff
relief), not just at the end. Radiopaque markers aid detection if retained but do not
replace accurate counting, and documentation must occur before patient transfer.
Question 11: Which of the following is the MOST effective strategy to prevent
surgical site infections (SSIs) in perioperative practice?
