Page 1 of 143
Cnor (Certified Nurse Operating Room) Exam
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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
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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
allergy to “sulfa.” Which medication should be avoided?
A. Cefazolin
B. Clindamycin
C. Vancomycin
D. Gentamicin
Answer: A
Rationale: Cefazolin is a cephalosporin with cross-reactivity
potential in sulfa-allergic patients, though risk is low.
6. Scenario: A 45-year-old female is scheduled for
cholecystectomy. She takes warfarin for atrial fibrillation.
When should warfarin be stopped?
A. Morning of surgery
B. 24 hours before
C. 5 days before
D. Continue as usual
Answer: C
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
allergy to “sulfa.” Which medication should be avoided?
A. Cefazolin
B. Clindamycin
C. Vancomycin
D. Gentamicin
Answer: A
Rationale: Cefazolin is a cephalosporin with cross-reactivity
potential in sulfa-allergic patients, though risk is low.
6. Scenario: A 45-year-old female is scheduled for
cholecystectomy. She takes warfarin for atrial fibrillation.
When should warfarin be stopped?
A. Morning of surgery
B. 24 hours before
C. 5 days before
D. Continue as usual
Answer: C
