Page 1 of 143
Cnor (Certified Nurse Operating Room) Exam
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Questions With Correct Answers (Verified
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1. A 72-year-old patient with history of heart failure and
CKD is scheduled for ventral hernia repair. Which
preoperative lab value is most critical to report to the
surgeon?
A. Hgb 11.2 g/dL
B. K+ 5.9 mEq/L
C. Creatinine 1.3 mg/dL
D. INR 1.1
,Page 2 of 143
Answer: B
Rationale: K+ 5.9 mEq/L indicates hyperkalemia, which
increases risk of cardiac arrhythmias under anesthesia. CKD
patients are prone. Normal range 3.5–5.0.
2. During preoperative verification, the patient says, “I had
a sip of water 2 hours ago.” What is the best action?
A. Cancel the case
B. Proceed only if emergency
C. Delay case 6 hours
D. Check anesthesia protocol — proceed if clear liquids
Answer: D
Rationale: ASA guidelines allow clear liquids up to 2 hours
before anesthesia. No delay needed.
3. Which finding on preoperative assessment requires
further investigation for VTE risk?
A. Active smoking
B. BMI 31
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C. Long-haul flight 10 days ago
D. All of the above
Answer: D
Rationale: Smoking, obesity, and recent prolonged
immobilization are all VTE risk factors.
4. A patient with a history of malignant hyperthermia (MH)
is scheduled for general anesthesia. Which agent must be
avoided?
A. Propofol
B. Succinylcholine
C. Ketamine
D. Fentanyl
Answer: B
Rationale: Succinylcholine and volatile anesthetics (e.g.,
sevoflurane) trigger MH. Propofol, ketamine, and opioids are
safe.
, Page 4 of 143
5. During preoperative assessment, the patient reports an
p. p. p. p. p. p.
allergy to “sulfa.” Which medication should be avoided?
p. p. p. p. p. p. p.
A. Cefazolin
B. Clindamycin
C. Vancomycin
D. Gentamicin
Answer: A p .
Rationale: Cefazolin is a cephalosporin with cross-reactivity
p. p. p. p. p. p.
p. potential in sulfa-allergic patients, though risk is low.
p. p. p. p. p. p. p.
6. Scenario: A 45-year-old female is scheduled for p. p. p. p. p. p.
p. cholecystectomy. She takes warfarin for atrial fibrillation. p. p. p. p. p. p.
p. When should warfarin be stopped?
p. p. p. p.
A. Morning of surgery p. p.
B. 24 hours before
p. p.
C. 5daysbefore
p. p.
D. Continue as usual p. p.
Answer: C p .
Cnor (Certified Nurse Operating Room) Exam
Test Bank 2026/2027 Newest Updated
Questions With Correct Answers (Verified
Answers), 100% Guaranteed Pass
||Complete A+ Guide; Package Deal 2025!!!
1. A 72-year-old patient with history of heart failure and
CKD is scheduled for ventral hernia repair. Which
preoperative lab value is most critical to report to the
surgeon?
A. Hgb 11.2 g/dL
B. K+ 5.9 mEq/L
C. Creatinine 1.3 mg/dL
D. INR 1.1
,Page 2 of 143
Answer: B
Rationale: K+ 5.9 mEq/L indicates hyperkalemia, which
increases risk of cardiac arrhythmias under anesthesia. CKD
patients are prone. Normal range 3.5–5.0.
2. During preoperative verification, the patient says, “I had
a sip of water 2 hours ago.” What is the best action?
A. Cancel the case
B. Proceed only if emergency
C. Delay case 6 hours
D. Check anesthesia protocol — proceed if clear liquids
Answer: D
Rationale: ASA guidelines allow clear liquids up to 2 hours
before anesthesia. No delay needed.
3. Which finding on preoperative assessment requires
further investigation for VTE risk?
A. Active smoking
B. BMI 31
,Page 3 of 143
C. Long-haul flight 10 days ago
D. All of the above
Answer: D
Rationale: Smoking, obesity, and recent prolonged
immobilization are all VTE risk factors.
4. A patient with a history of malignant hyperthermia (MH)
is scheduled for general anesthesia. Which agent must be
avoided?
A. Propofol
B. Succinylcholine
C. Ketamine
D. Fentanyl
Answer: B
Rationale: Succinylcholine and volatile anesthetics (e.g.,
sevoflurane) trigger MH. Propofol, ketamine, and opioids are
safe.
, Page 4 of 143
5. During preoperative assessment, the patient reports an
p. p. p. p. p. p.
allergy to “sulfa.” Which medication should be avoided?
p. p. p. p. p. p. p.
A. Cefazolin
B. Clindamycin
C. Vancomycin
D. Gentamicin
Answer: A p .
Rationale: Cefazolin is a cephalosporin with cross-reactivity
p. p. p. p. p. p.
p. potential in sulfa-allergic patients, though risk is low.
p. p. p. p. p. p. p.
6. Scenario: A 45-year-old female is scheduled for p. p. p. p. p. p.
p. cholecystectomy. She takes warfarin for atrial fibrillation. p. p. p. p. p. p.
p. When should warfarin be stopped?
p. p. p. p.
A. Morning of surgery p. p.
B. 24 hours before
p. p.
C. 5daysbefore
p. p.
D. Continue as usual p. p.
Answer: C p .
