USMLE Step 2 Quiz: Perioperative Management

What this quiz covers

This quiz focuses on Perioperative Management, giving you a quick way to practice the rules, question types, and explanations that matter most for USMLE Step 2.

How to use this quiz

Try each quiz question before looking at the correct answer. Use the explanations to review missed ideas, then come back to similar questions until the pattern feels familiar.

Question 1

1. Proceed to surgery without further cardiac testing
2. Obtain pre-op coronary angiography routinely
3. Order noninvasive stress testing before surgery (correct answer)
4. Order transthoracic echocardiogram routinely
5. Order serial troponins for 24 hours pre-op

Explanation: This question tests USMLE Step 2 CK perioperative management skills, specifically the ability to optimize patients preoperatively and manage perioperative risks. Perioperative management involves evaluating surgical risk, optimizing medical conditions, and planning for potential complications. In this vignette, the patient presents with exertional chest tightness and poor functional capacity, requiring cardiac evaluation before elective surgery. The correct choice, C, is supported by ACC/AHA guidelines for preoperative cardiac risk assessment, addressing the patient's active symptoms and inability to achieve 4 METs. A common distractor, A, fails because it ignores unstable angina symptoms, often due to overreliance on asymptomatic status. Effective teaching strategies include reviewing current guidelines for perioperative care and practicing case scenarios that highlight common pitfalls. Emphasize the importance of individualizing care based on comprehensive risk assessment.

Question 2

1. Continue apixaban through surgery without interruption
2. Stop apixaban 48 hours pre-op, no bridging (correct answer)
3. Stop apixaban 7 days pre-op, no bridging
4. Stop apixaban 24 hours pre-op, bridge LMWH
5. Stop apixaban 48 hours pre-op, bridge UFH

Explanation: This question tests USMLE Step 2 CK perioperative management skills, specifically the ability to optimize patients preoperatively and manage perioperative risks. Perioperative management involves evaluating surgical risk, optimizing medical conditions, and planning for potential complications. In this vignette, the patient presents with nonvalvular atrial fibrillation on apixaban, stage 3 CKD, and is undergoing elective hip arthroplasty with moderate-to-high bleeding risk, requiring careful anticoagulation interruption without bridging due to moderate thromboembolic risk. The correct choice, B, is supported by ACC/AHA guidelines for perioperative anticoagulation in patients on DOACs, addressing the patient's need for safe drug clearance given reduced renal function. A common distractor, D, fails because it unnecessarily adds bridging with LMWH, often due to overestimation of thromboembolic risk in nonvalvular AF without recent events. Effective teaching strategies include reviewing current guidelines for perioperative care and practicing case scenarios that highlight common pitfalls. Emphasize the importance of individualizing care based on comprehensive risk assessment.

Question 3

1. Hold metoprolol to avoid intraoperative hypotension
2. Continue metoprolol through the perioperative period (correct answer)
3. Stop metoprolol 7 days before surgery
4. Replace metoprolol with clonidine on surgery day
5. Give metoprolol only if HR exceeds 100

Explanation: This question tests USMLE Step 2 CK perioperative management skills, specifically the ability to optimize patients preoperatively and manage perioperative risks. Perioperative management involves evaluating surgical risk, optimizing medical conditions, and planning for potential complications. In this vignette, the patient presents with prior MI on chronic metoprolol, requiring continuation to prevent withdrawal effects during major surgery. The correct choice, B, is supported by ACC/AHA guidelines for perioperative beta-blocker management, addressing the patient's cardiovascular stability. A common distractor, A, fails because it risks rebound tachycardia, often due to fear of bradycardia without evidence of decompensation. Effective teaching strategies include reviewing current guidelines for perioperative care and practicing case scenarios that highlight common pitfalls. Emphasize the importance of individualizing care based on comprehensive risk assessment.

Question 4

1. Stop rivaroxaban 72 hours before spinal anesthesia (correct answer)
2. Stop rivaroxaban 12 hours before spinal anesthesia
3. Continue rivaroxaban; perform spinal anesthesia
4. Stop rivaroxaban; bridge therapeutic LMWH until surgery
5. Switch rivaroxaban to aspirin 48 hours pre-op

Explanation: This question tests USMLE Step 2 CK perioperative management skills, specifically the ability to optimize patients preoperatively and manage perioperative risks. Perioperative management involves evaluating surgical risk, optimizing medical conditions, and planning for potential complications. In this vignette, the patient presents with atrial fibrillation on rivaroxaban and amiodarone, requiring extended hold before spinal anesthesia for hip replacement. The correct choice, A, is supported by ASRA guidelines for neuraxial procedures, addressing the patient's risk of spinal hematoma with drug interactions. A common distractor, B, fails because it provides insufficient hold time for high-risk anesthesia, often due to applying standard DOAC intervals. Effective teaching strategies include reviewing current guidelines for perioperative care and practicing case scenarios that highlight common pitfalls. Emphasize the importance of individualizing care based on comprehensive risk assessment.

Question 5

1. Hold warfarin 5 days; no bridging anticoagulation
2. Continue warfarin; proceed if INR under 3.5
3. Hold warfarin 5 days; bridge therapeutic heparin (correct answer)
4. Hold warfarin 2 days; give oral vitamin K
5. Switch warfarin to clopidogrel until after surgery

Explanation: This question tests USMLE Step 2 CK perioperative management skills, specifically the ability to optimize patients preoperatively and manage perioperative risks. Perioperative management involves evaluating surgical risk, optimizing medical conditions, and planning for potential complications. In this vignette, the patient presents with mechanical mitral valve on warfarin, requiring bridging for high thromboembolic risk during elective surgery. The correct choice, C, is supported by ACC/AHA guidelines for mechanical valves, addressing the patient's need for uninterrupted anticoagulation. A common distractor, A, fails because it omits bridging, often due to underestimating embolism risk in prosthetic valves. Effective teaching strategies include reviewing current guidelines for perioperative care and practicing case scenarios that highlight common pitfalls. Emphasize the importance of individualizing care based on comprehensive risk assessment.

Question 6

1. Cefazolin administered 30 minutes before skin incision (correct answer)
2. Vancomycin administered 2 hours before skin incision
3. Metronidazole administered at the time of induction of anesthesia
4. No antibiotic prophylaxis is necessary

Explanation: Laparoscopic cholecystectomy is a clean-contaminated procedure, and surgical site infection (SSI) prophylaxis is recommended. The most common organisms are skin flora and enteric gram-negatives. Cefazolin, a first-generation cephalosporin, provides excellent coverage against these organisms and is the standard of care. It should be administered within 60 minutes of skin incision to ensure adequate tissue levels. Vancomycin is reserved for patients with a severe beta-lactam allergy or high risk for MRSA. Metronidazole alone provides inadequate coverage. Withholding prophylaxis would increase the risk of SSI.

Question 7

1. Administering ondansetron as needed in the recovery room
2. Using a multimodal approach with a scopolamine patch, dexamethasone, and ondansetron (correct answer)
3. Ensuring adequate postoperative hydration with intravenous fluids
4. Prescribing prochlorperazine to be taken on the morning of surgery

Explanation: This patient has multiple risk factors for PONV (female, non-smoker, history of PONV/motion sickness, major abdominal surgery), placing her at high risk. The most effective strategy for high-risk patients is a multimodal prophylactic approach, using multiple antiemetics from different pharmacologic classes that act on different receptors. A combination of a scopolamine patch (anticholinergic), dexamethasone (corticosteroid), and ondansetron (5-HT3 antagonist) is a powerful preventative regimen. Administering medication 'as needed' is treatment, not prevention. Hydration is supportive but not a primary prophylactic measure. A single agent is less effective than combination therapy.

Question 8

1. Maintaining strict glycemic control with an insulin infusion (correct answer)
2. Administering a second dose of cefazolin 3 hours into the procedure
3. Using chlorhexidine-alcohol for skin preparation
4. Maintaining patient normothermia with a forced-air warming blanket

Explanation: While antibiotic redosing, appropriate skin preparation, and maintaining normothermia are all important components of SSI prevention bundles, perioperative hyperglycemia is a major independent and modifiable risk factor for SSI, particularly in orthopedic and cardiac surgery. Elevated blood glucose impairs neutrophil function and promotes bacterial growth. For this patient with known diabetes and preoperative hyperglycemia, maintaining strict intraoperative glycemic control (e.g., target <180-200 mg/dL) with an insulin infusion is the most critical intervention to reduce his infection risk.

Question 9

1. Administer small, frequent intravenous doses of morphine (correct answer)
2. Administer a one-time dose of intravenous ketorolac
3. Start a patient-controlled analgesia (PCA) pump
4. Discharge him from PACU with a prescription for oral hydrocodone

Explanation: The patient is experiencing severe acute postoperative pain (8/10). The most appropriate initial step is to gain rapid control of the pain using a titratable, short-acting intravenous opioid like morphine or fentanyl. Administering small, frequent doses allows for titration to effect while monitoring for adverse effects like respiratory depression. Ketorolac alone is unlikely to be sufficient for severe pain. A PCA pump is an excellent tool for managing pain after initial control is achieved, but the first step is to treat the severe pain with titrated boluses. Discharging the patient with uncontrolled pain is inappropriate.

Question 10

1. 48 hours
2. 1 week
3. 4 weeks (correct answer)
4. 12 weeks

Explanation: While any duration of smoking cessation before surgery is beneficial (cessation for >48 hours decreases carboxyhemoglobin levels and improves tissue oxygenation), a period of at least 4 weeks is recommended to achieve a significant reduction in postoperative pulmonary complications. This duration allows for improved mucociliary clearance, decreased sputum production, and improved immune function. An 8-week period is associated with even greater benefits, but 4 weeks is the most commonly cited minimum for substantial risk reduction.

Question 11

1. Continue the metoprolol, including on the morning of surgery (correct answer)
2. Hold the metoprolol for 24 hours before surgery
3. Double the dose of metoprolol to prevent perioperative ischemia
4. Switch to a shorter-acting beta-blocker such as esmolol

Explanation: Patients on chronic beta-blocker therapy should continue their medication throughout the perioperative period, including taking their usual dose on the morning of surgery. Abruptly stopping a beta-blocker can lead to rebound tachycardia and hypertension, which can increase the risk of myocardial ischemia and infarction. There is no indication to increase the dose or switch to a different agent in this stable patient. The POISE trial showed that initiating high-dose beta-blockers immediately before surgery in beta-blocker-naive patients increased mortality, highlighting the importance of continuing, but not aggressively starting or titrating, these medications.

Question 12

1. Hold the statin for 3 days prior to surgery
2. Continue the statin, including on the day of surgery (correct answer)
3. Decrease the statin dose by half until after she recovers
4. Switch to a different lipid-lowering agent such as ezetimibe

Explanation: Guidelines strongly recommend that patients already on statin therapy should continue it throughout the perioperative period. Statins have pleiotropic effects beyond lipid lowering, including anti-inflammatory properties, improved endothelial function, and plaque stabilization. Abrupt withdrawal of statins has been associated with an increased risk of adverse cardiovascular events, particularly in patients undergoing vascular surgery. Therefore, her atorvastatin should be continued without interruption.

Question 13

1. Proceed with surgery using a standard general anesthetic protocol
2. Cancel surgery until a formal polysomnography can be completed
3. Proceed with surgery, notifying anesthesia of high OSA risk and planning for enhanced postoperative monitoring (correct answer)
4. Refer him for bariatric surgery prior to his knee replacement

Explanation: This patient has a high probability of severe, undiagnosed obstructive sleep apnea (OSA) based on his symptoms and BMI (high STOP-BANG score). Patients with OSA are at increased risk of perioperative complications, particularly respiratory depression from anesthetics and opioids. The most appropriate approach is to proceed with surgery but with significant precautions. This includes informing the anesthesia team to consider regional anesthesia and minimize opioids, and planning for enhanced postoperative monitoring, such as in a telemetry or step-down unit, with continuous pulse oximetry. Canceling an often necessary surgery for a formal sleep study can cause significant delays. Ignoring the risk is unsafe. Recommending bariatric surgery first does not address the immediate surgical need.

Question 14

1. Hold his home opioid regimen and use a standard postoperative pain protocol
2. Continue his baseline opioid requirement and add short-acting opioids for acute pain (correct answer)
3. Taper his home opioids before surgery to reduce tolerance
4. Switch him to a methadone regimen 1 week preoperatively

Explanation: Patients on chronic opioid therapy are opioid-tolerant and will have both a baseline pain requirement and acute surgical pain. The most appropriate management is to continue their baseline chronic opioid dose (or an equianalgesic equivalent) throughout the perioperative period to prevent withdrawal and treat their chronic pain. Acute surgical pain should be treated on top of this baseline with additional, short-acting opioids (e.g., via a patient-controlled analgesia pump). Holding their home regimen would cause withdrawal and uncontrolled pain. Tapering before surgery is generally not feasible or recommended. Switching to methadone is a complex process reserved for specialists and not a routine preoperative adjustment.

Question 15

1. A 1-week course of systemic corticosteroids
2. Delaying surgery for another 4 weeks
3. Initiating an intensive inspiratory muscle training program (correct answer)
4. Ordering preoperative arterial blood gas analysis

Explanation: This patient is at high risk for postoperative pulmonary complications (PPCs) due to his severe COPD and the nature of the surgery (upper abdominal). He has already achieved the most significant risk reduction by quitting smoking for 8 weeks. Preoperative inspiratory muscle training is an evidence-based intervention that has been shown to decrease the incidence of PPCs, particularly in high-risk patients. Systemic corticosteroids are only indicated for an acute exacerbation, which is not present. Delaying surgery further provides minimal additional benefit over the 8 weeks of smoking cessation. An ABG provides a baseline but is a diagnostic test, not an intervention to reduce risk.

Question 16

1. Cefazolin
2. Vancomycin
3. Ceftriaxone plus metronidazole (correct answer)
4. Gentamicin

Explanation: Colorectal surgery is a clean-contaminated procedure with high risk of infection from enteric flora, including gram-negative bacteria and anaerobes. Prophylactic antibiotics must provide coverage for both. Cefazolin alone lacks adequate anaerobic coverage. Vancomycin covers only gram-positive organisms. Gentamicin covers gram-negatives but not anaerobes. The combination of ceftriaxone (broad gram-negative coverage) plus metronidazole (anaerobic coverage) is a standard recommended regimen. Alternative single agents with dual coverage include cefoxitin, ertapenem, or ampicillin-sulbactam.

Question 17

1. Proceed with surgery, as hernia repair is a low-risk procedure
2. Administer fresh frozen plasma preoperatively to correct the INR
3. Strongly advise against elective surgery due to prohibitive risk (correct answer)
4. Optimize with an albumin infusion and proceed with a laparoscopic repair

Explanation: The patient's surgical risk is best estimated by the Child-Pugh classification. He has elevated bilirubin (>3 mg/dL, 3 points), low albumin (<2.8 g/dL, 3 points), elevated INR (1.7-2.2, 2 points), and moderate ascites (2 points), for a total of 10 points. This places him in Child-Pugh Class C, which is associated with a perioperative mortality rate of over 50% for abdominal surgery. Elective surgery is contraindicated in patients with Child-Pugh Class C cirrhosis. Attempts to 'optimize' with FFP or albumin do not change the underlying severity of liver dysfunction and the associated high mortality risk.

Question 18

1. Take half the usual dose of insulin glargine and hold metformin (correct answer)
2. Take the full dose of insulin glargine and hold metformin
3. Hold both insulin glargine and metformin
4. Take half the usual dose of metformin and hold insulin glargine

Explanation: Metformin should be held for at least 24 hours before major surgery, especially procedures associated with hemodynamic instability, renal impairment, or use of iodinated contrast, due to the risk of lactic acidosis. Basal insulin (glargine) should be continued to prevent hyperglycemia and ketosis during the stress of surgery. However, because the patient will be NPO (nothing by mouth), the dose is typically reduced to 50-75% of the usual dose to prevent hypoglycemia. Holding basal insulin entirely can lead to severe hyperglycemia.

Question 19

1. Cefazolin (correct answer)
2. Clindamycin
3. Vancomycin
4. Aztreonam

Explanation: The patient describes a low-risk, non-anaphylactic reaction to a penicillin (a delayed, cutaneous rash). The risk of cross-reactivity between penicillins and first- or second-generation cephalosporins in such patients is extremely low (<2%) and is not higher than the risk of an allergic reaction in the general population. Therefore, it is considered safe to administer cefazolin, which is the preferred agent for prophylaxis in hysterectomy due to its ideal spectrum of activity and safety profile. Clindamycin and vancomycin are appropriate alternatives for patients with a true, severe IgE-mediated beta-lactam allergy, but they are less optimal due to their spectrum or potential for side effects (e.g., C. difficile with clindamycin).

Question 20

1. Acetaminophen
2. Ketorolac (correct answer)
3. Gabapentin
4. Lidocaine patch

Explanation: Ketorolac is a nonsteroidal anti-inflammatory drug (NSAID) that is very effective for postoperative pain but carries a significant risk of nephrotoxicity. NSAIDs cause constriction of the afferent arteriole of the glomerulus, which can reduce renal blood flow and precipitate acute kidney injury, especially in patients with pre-existing chronic kidney disease (CKD). This patient's eGFR of 45 places him at high risk. Acetaminophen, gabapentin (with dose adjustment for renal function), and topical lidocaine are all safer alternatives that can be used as part of a multimodal analgesic regimen in a patient with CKD.