- Elderly patient, postop day 1 after hip arthroplasty, agitated, pulling at IV. First-line?
Answer: Nonpharmacologic care
In postoperative delirium, your first move is supportive care: reorient, remove the IV source, involve family, and protect sleep. Haloperidol is the most tempting choice for acute agitation, but medications are reserved only after nonpharmacologic measures fail or the patient is unsafe. Lorazepam can worsen delirium in older adults and restraints are not first-line.
- A 68-year-old man is on postoperative day 5 following a sigmoid colectomy for complicated diverticulitis. He develops a fever of 39.1°C (102.4°F), a heart rate of 115/min, and complains of new-onset, localized pain in the left lower quadrant. His white blood cell count is 18,000/mm³. The surgical incision appears clean and without drainage. Chest x-ray is clear.
Answer: Perform a CT scan of the abdomen and pelvis with oral and IV contrast.
The patient's presentation on postoperative day 5 with fever, tachycardia, localized abdominal pain, and leukocytosis is highly concerning for an intra-abdominal abscess or an anastomotic leak. A CT scan of the abdomen and pelvis with contrast is the most appropriate next step to confirm the diagnosis and guide further management, such as percutaneous drainage or surgical intervention. While antibiotics are necessary, they should be initiated after or concurrently with imaging to identify the source. Incentive spirometry targets atelectasis, which typically presents earlier (POD 1-2). Exploratory laparotomy is premature without first confirming the diagnosis with imaging.
- A 78-year-old man is on postoperative day 2 following a right hemicolectomy for colon cancer. He develops new-onset atrial fibrillation with a heart rate of 145/min. His blood pressure is 105/65 mmHg. He is awake, alert, and denies chest pain or shortness of breath. An ECG confirms atrial fibrillation with a rapid ventricular response.
Answer: An intravenous bolus of metoprolol.
The patient has new-onset postoperative atrial fibrillation with a rapid ventricular response but is hemodynamically stable. The primary goal is rate control. Intravenous beta-blockers (e.g., metoprolol) or non-dihydropyridine calcium channel blockers (e.g., diltiazem) are the first-line agents for acute rate control in this setting. Synchronized cardioversion is reserved for hemodynamically unstable patients. Amiodarone is typically a second-line agent for rate control or can be used for rhythm control. Digoxin has a slow onset of action and is not ideal for acute management.
- A 58-year-old man underwent a low anterior resection with a diverting loop ileostomy for rectal cancer. His postoperative course was complicated by a small, contained anastomotic leak diagnosed on POD 7, which was successfully managed non-operatively with bowel rest and IV antibiotics. He is now 4 weeks post-surgery, feeling well, and tolerating a diet. He is being seen to discuss the next steps in his care.
Answer: A contrast enema or flexible sigmoidoscopy should be performed prior to ileostomy reversal.
Before reversing a diverting ileostomy, especially after an anastomotic leak, it is mandatory to confirm the integrity and healing of the downstream anastomosis. This is typically done with a contrast study (e.g., water-soluble contrast enema) or endoscopy to ensure there is no persistent leak, stricture, or other pathology. Proceeding with reversal without this confirmation would be unsafe. Scheduling reversal is premature. Lifelong TPN is not indicated. A permanent colostomy is not necessary if the leak has healed and the anastomosis is intact.
- A 50-year-old man has been in the ICU for two weeks recovering from severe thermal burns covering 40% of his body surface area. He has been receiving total parenteral nutrition (TPN) for the past 12 days. He develops a new fever to 39.0°C (102.2°F), right upper quadrant tenderness, and a white blood cell count of 16,000/mm³. An abdominal ultrasound shows a distended gallbladder with a thickened wall (>4 mm) and pericholecystic fluid, but no gallstones are visualized.
Answer: Acute acalculous cholecystitis.
When you encounter a critically ill patient with gallbladder symptoms but no stones on imaging, think acute acalculous cholecystitis (AAC). This condition typically affects patients with severe illness, prolonged fasting, or TPN use—exactly what we see here.
This patient's presentation perfectly fits AAC: he's critically ill with severe burns, has been on prolonged TPN (12 days), and shows the classic triad of fever, right upper quadrant pain, and leukocytosis. The ultrasound findings of gallbladder wall thickening >4mm, distension, and pericholecystic fluid without stones clinch the diagnosis. AAC occurs because critical illness and prolonged fasting lead to gallbladder stasis and ischemia, causing inflammation without obstruction.
Looking at the wrong answers: (A) Ascending cholangitis would present with Charcot's triad (fever, jaundice, RUQ pain) and typically requires biliary obstruction—you'd expect dilated bile ducts on imaging. (B) TPN-induced cholestasis causes jaundice and elevated bilirubin rather than acute inflammatory symptoms with normal bile ducts. (C) Acute pancreatitis would cause epigastric pain radiating to the back with elevated lipase/amylase, not the focused RUQ tenderness and gallbladder changes seen here.
For USMLE Step 3, remember that AAC is a high-yield diagnosis in ICU patients. Key associations include major surgery, burns, sepsis, prolonged fasting, and TPN use. Unlike calculous cholecystitis, stones are absent, but the inflammatory findings on imaging are the same. Early recognition is crucial since AAC can rapidly progress to perforation.
- A 30-year-old man is admitted to the ICU after a motor vehicle collision. He has a stable pelvic ring fracture and a grade III splenic laceration, which is being managed non-operatively. His hematocrit has been stable for 24 hours. He is hemodynamically stable. He is currently immobilized due to the pelvic fracture.
Answer: Begin chemical prophylaxis 48 to 72 hours after injury if bleeding remains stable.
This patient has a high risk for venous thromboembolism (VTE) due to trauma and immobility, but also a significant risk of hemorrhage from the splenic injury. The standard approach is to balance these risks. In stable, non-operatively managed solid organ injuries, chemical VTE prophylaxis is typically initiated 48-72 hours after the injury, provided there is no evidence of ongoing bleeding. Initiating it immediately carries an unacceptably high risk of causing the spleen to re-bleed. An IVC filter is reserved for patients with a contraindication to anticoagulation or failure of therapy. Waiting until after surgery may excessively delay prophylaxis, increasing VTE risk.
- Two days after knee surgery, a 45-year-old woman on prophylactic LMWH develops sudden dyspnea and syncope; BP 82/50, HR 128; bedside echo shows RV dilation. Which intervention is most critical at this stage of care?
Answer: Administer systemic thrombolysis if no absolute contraindications are present
This question tests USMLE Step 3 competencies in postoperative and post-trauma care, focusing on management strategies and complication prevention. Understanding the principles of postoperative care involves recognizing common complications and appropriate interventions based on clinical guidelines. In this scenario, the patient presents with sudden dyspnea, syncope, hypotension, tachycardia, and RV dilation on echo two days after knee surgery, necessitating consideration of massive pulmonary embolism management. Choice A is correct because it directly addresses the patient's current clinical needs, aligning with best practices for thrombolysis in hemodynamically unstable PE. Choice B is incorrect because it reflects a common misconception, such as delaying for outpatient imaging, leading to inadequate management and mortality risk. To enhance learning, students should focus on mastering complication recognition and prioritization of care, utilizing scenario-based practice to reinforce decision-making skills and prevent common clinical pitfalls.
- A 62-year-old woman on postoperative day 7 from a total knee arthroplasty develops the acute onset of pleuritic chest pain and dyspnea. She has been receiving prophylactic enoxaparin. Her heart rate is 110/min, respiratory rate is 24/min, and oxygen saturation is 90% on room air. Her lungs are clear to auscultation. Her surgical incision is clean.
Answer: Obtain a CT pulmonary angiography (CTPA).
When you encounter a patient with acute onset pleuritic chest pain and dyspnea following major surgery, pulmonary embolism (PE) should be your primary concern. This 62-year-old woman has classic risk factors: recent orthopedic surgery, immobilization, and advanced age. Despite prophylactic anticoagulation, breakthrough PE can still occur, especially after high-risk procedures like knee arthroplasty.
The correct answer is A because CT pulmonary angiography (CTPA) is the gold standard diagnostic test for PE in hemodynamically stable patients. It provides rapid, accurate visualization of pulmonary vessels and can detect emboli directly. Given her clear clinical presentation and intermediate-to-high pretest probability, immediate imaging is warranted.
Option B, V/Q scanning, is primarily used when CTPA is contraindicated (renal insufficiency, contrast allergy) or unavailable. It's less specific and takes longer to complete. Option C, D-dimer measurement, would likely be elevated but lacks specificity in postoperative patients due to ongoing inflammation and healing processes. A negative D-dimer might be useful to rule out PE in low-risk patients, but this patient's high pretest probability makes it unhelpful. Option D, echocardiography, might show right heart strain in severe PE but cannot diagnose PE directly and wouldn't be the initial diagnostic test.
Remember: In postoperative patients with suspected PE and intermediate-to-high pretest probability, proceed directly to CTPA rather than using screening tests like D-dimer. Time is critical, and definitive imaging provides both diagnosis and guides immediate treatment decisions.
- After a motor vehicle collision, a 30-year-old woman arrives hypotensive (BP 78/44) and tachycardic (HR 132); FAST is positive for free fluid; Hgb 9.2 g/dL, lactate 5.1 mmol/L. Which intervention is most critical at this stage of care?
Answer: Activate massive transfusion protocol and proceed to emergent operative control
This question tests USMLE Step 3 competencies in postoperative and post-trauma care, focusing on management strategies and complication prevention. Understanding the principles of postoperative care involves recognizing common complications and appropriate interventions based on clinical guidelines. In this scenario, the patient presents with hypotension, tachycardia, positive FAST, low hemoglobin, and elevated lactate after MVC, necessitating consideration of hemorrhagic shock management. Choice B is correct because it directly addresses the patient's current clinical needs, aligning with best practices for massive transfusion and operative control in unstable trauma. Choice A is incorrect because it reflects a common misconception, such as relying solely on crystalloids, leading to inadequate management and dilutional coagulopathy. To enhance learning, students should focus on mastering complication recognition and prioritization of care, utilizing scenario-based practice to reinforce decision-making skills and prevent common clinical pitfalls.
- A 70-year-old man with a history of benign prostatic hyperplasia is in the post-anesthesia care unit 6 hours after an inguinal hernia repair performed under spinal anesthesia. He complains of significant suprapubic discomfort and has an urgent desire to void but is unable to do so. A bladder scan shows 700 mL of urine.
Answer: Perform a one-time, in-and-out bladder catheterization.
When you encounter postoperative urinary retention, especially after spinal anesthesia in elderly men with BPH, you're dealing with a common but urgent complication that requires immediate relief to prevent bladder injury and patient discomfort.
This patient has classic acute urinary retention with 700 mL in his bladder (normal capacity is 300-500 mL) and inability to void despite strong urge. The combination of spinal anesthesia (which temporarily impairs bladder function), his age, BPH history, and recent surgery creates the perfect storm for retention.
Option D is correct because immediate bladder decompression is essential. A one-time, in-and-out catheterization provides instant relief without the infection risks of an indwelling catheter. Many patients regain normal voiding function once the spinal anesthesia completely wears off.
Option A (tamsulosin) won't work fast enough - alpha-blockers take days to weeks for full effect, and this patient needs immediate relief. Option B (ambulation and fluids) is counterproductive - adding more fluid to an already overdistended bladder worsens the situation, and walking won't overcome the mechanical/neurological obstruction. Option C (indwelling Foley for 3 days) is unnecessarily invasive for what might be temporary retention; it significantly increases infection risk and isn't the first-line approach.
For Step 3, remember that urinary retention with volumes >500-600 mL requires immediate catheterization. Always try the least invasive effective intervention first - straight catheterization before indwelling catheters unless multiple attempts are expected.
- A 45-year-old man is in the ICU on postoperative day 3 following an emergency laparotomy for a perforated duodenal ulcer. He remains intubated and sedated. He has been NPO with maintenance IV fluids. His abdomen is distended with absent bowel sounds. His hemodynamic status is stable on low-dose vasopressors.
Answer: Place a nasojejunal feeding tube and begin trophic enteral feeds.
Early enteral nutrition (within 24-48 hours) is strongly recommended in critically ill patients to maintain gut mucosal integrity, reduce septic complications, and modulate the stress response. Waiting for bowel sounds to return is an outdated practice. TPN is associated with more complications (e.g., infection, cholestasis) and should be avoided if the gut is usable. Since the patient likely has a gastric ileus, post-pyloric feeding via a nasojejunal (or dobhoff) tube is the preferred method to deliver enteral nutrition. Starting with trophic ('trickle') feeds is a common strategy to assess tolerance.
- A 35-year-old woman who underwent a Roux-en-Y gastric bypass 3 years ago presents to the emergency department with a 12-hour history of severe, cramping, periumbilical abdominal pain and non-bilious vomiting. On examination, she is tachycardic to 120/min and has diffuse abdominal tenderness without peritoneal signs. A plain abdominal x-ray is unremarkable.
Answer: Internal hernia with small bowel obstruction.
When you encounter post-bariatric surgery patients with acute abdominal pain, think systematically about the unique complications these procedures create. Roux-en-Y gastric bypass creates several potential spaces where bowel can become trapped, making internal hernias a significant long-term risk.
This patient's presentation strongly suggests internal hernia with small bowel obstruction. The severe, cramping periumbilical pain with non-bilious vomiting is classic for small bowel obstruction. The tachycardia indicates physiologic stress, while the absence of peritoneal signs suggests obstruction without perforation. Crucially, plain abdominal x-rays are often normal in early small bowel obstruction, especially when caused by internal hernias where bowel loops can appear deceptively normal on plain films.
Option B, marginal ulcer at the gastrojejunostomy, typically presents with epigastric pain, often related to eating, and may cause hematemesis or melena rather than this obstruction pattern. Option C, gastric dumping syndrome, occurs shortly after eating and involves cramping with diarrhea, sweating, and palpitations - not the sustained severe pain described here. Option D, acute calculous cholecystitis, would cause right upper quadrant pain with possible Murphy's sign, not periumbilical cramping.
For Step 3, remember that internal hernias are the most common cause of bowel obstruction in post-Roux-en-Y patients, often presenting months to years after surgery. When plain films are unremarkable but clinical suspicion is high, CT scan is the next step. Don't be fooled by normal plain films in suspected small bowel obstruction.
- A 24-year-old man is being discharged following an emergent splenectomy for a grade V splenic laceration from a motorcycle accident. His childhood immunizations are up to date, but he has not received any other specific vaccines. The hospital course was otherwise uncomplicated.
Answer: Schedule an appointment to administer these vaccines approximately 14 days after discharge.
Patients who undergo splenectomy are at lifelong risk for overwhelming post-splenectomy infection (OPSI), particularly from encapsulated organisms. Vaccination is the cornerstone of prevention. To ensure an adequate immune response, it is recommended to administer the Streptococcus pneumoniae, Haemophilus influenzae type b, and meningococcal vaccines either >14 days before elective splenectomy or >14 days after emergent splenectomy. Administering them immediately post-op may result in a suboptimal immune response. Prophylactic antibiotics may be used in some cases, but they do not replace vaccination. Annual influenza vaccine is also recommended but does not cover the key encapsulated bacteria.
- Postop day 2 after colectomy: temp 38.6, HR 100, lungs clear. Best initial?
Answer: Encourage early ambulation
Fever on postoperative day 2 with clear lungs and only mild tachycardia is classically atelectasis, so first step is early ambulation and incentive spirometry. This improves ventilation and often resolves the fever. Blood and urine cultures are tempting but not initial unless the patient has signs of infection; broad-spectrum antibiotics and CT abdomen are reserved for suspected leak or sepsis, not routine early postoperative fever.
- A 28-year-old man is 12 hours postoperative from an intramedullary nail fixation of a right tibial shaft fracture. He is using a patient-controlled analgesia (PCA) pump with morphine. The nurse calls to report that his pain is progressively worsening and is not relieved by additional PCA doses. On examination, the patient's lower leg is tense and exquisitely tender. He reports numbness between his first and second toes. Pain is dramatically increased with passive dorsiflexion of the toes.
Answer: Immediately notify the orthopedic surgeon for possible fasciotomy.
When you encounter progressive, severe post-operative pain in an extremity that's unresponsive to opioids, think compartment syndrome—a surgical emergency requiring immediate recognition and intervention.
This patient presents classic signs of compartment syndrome: progressively worsening pain despite adequate analgesia, tense and tender lower leg, numbness in the first web space (deep peroneal nerve distribution), and severe pain with passive toe dorsiflexion. The mechanism involves increased pressure within fascial compartments that compromises circulation and nerve function. Tibial fractures, especially with intramedullary nailing, carry significant compartment syndrome risk due to bleeding and swelling in tight fascial spaces.
Option D is correct because compartment syndrome requires emergency fasciotomy to relieve pressure and prevent permanent damage to muscles, nerves, and potentially limb loss. Every hour of delay increases morbidity.
Option A is wrong because increasing morphine won't address the underlying pathophysiology and may mask important clinical signs. Pain from compartment syndrome is characteristically severe and opioid-resistant.
Option B wastes critical time. While hardware complications exist, the clinical picture clearly suggests compartment syndrome, not implant failure.
Option C is incorrect because ketorolac, though helpful for post-operative pain, cannot relieve compartment syndrome. NSAIDs may also increase bleeding risk in this setting.
Study tip: Remember the "5 P's" of compartment syndrome: Pain (especially with passive stretch), Pressure, Pallor, Paresthesias, and Pulselessness. However, don't wait for all signs—severe pain with passive stretch is the earliest and most reliable indicator requiring immediate surgical consultation.
- Crush injury, brown urine, potassium 6.1, peaked T waves. Best first step?
Answer: IV calcium gluconate
Peaked T waves with potassium 6.1 mean hyperkalemia is causing cardiac membrane instability, so the first step is IV calcium gluconate to stabilize the myocardium. IV insulin and glucose is tempting because it lowers potassium, but it acts too slowly to protect the heart from arrhythmia. IV sodium bicarbonate also lowers potassium gradually, and IV saline treats volume depletion but not the immediate cardiac risk.
- A 65-year-old man is on postoperative day 4 from a coronary artery bypass grafting procedure. His indwelling urinary catheter was removed on postoperative day 2. He now complains of new-onset urinary frequency and dysuria. His temperature is 38.5°C (101.3°F).
Answer: Obtain a urinalysis and urine culture, and start empiric antibiotics.
The combination of new urinary symptoms (dysuria, frequency) and fever in a patient who was recently catheterized is highly suggestive of a catheter-associated urinary tract infection (CAUTI). Even though the catheter has been removed, the infection may have been acquired during its placement. The most appropriate management is to obtain a urinalysis and urine culture to guide therapy and to start empiric antibiotics targeted at common uropathogens (e.g., E. coli). Reassurance is inappropriate given the fever. Renal ultrasound is not indicated for an uncomplicated UTI. The symptoms are not consistent with C. difficile colitis.
- A 22-year-old woman is seen for follow-up 6 weeks after hospital discharge for a pelvic fracture sustained in a severe motor vehicle accident. She reports intrusive memories of the crash, persistent nightmares, and avoids getting into cars. She states she feels detached from her friends and family and is constantly 'on edge.' These symptoms are causing significant distress and impairing her ability to return to work.
Answer: Refer her to a mental health professional for trauma-focused psychotherapy.
When you encounter a patient presenting with trauma-related symptoms following a significant event, you need to systematically assess the duration, severity, and functional impact to distinguish between normal stress responses and clinical disorders like PTSD.
This patient presents with classic PTSD symptoms occurring 6 weeks post-trauma: intrusive memories (re-experiencing), nightmares, avoidance behaviors (won't get in cars), emotional numbing (detachment from others), and hypervigilance ("on edge"). Crucially, these symptoms are causing significant functional impairment (can't return to work) and have persisted beyond the typical acute stress response timeframe. PTSD requires specialized trauma-focused psychotherapy as first-line treatment, making referral to a mental health professional (D) the most appropriate intervention.
Option A is incorrect because while some initial stress response is normal, symptoms persisting 6 weeks with functional impairment indicate a clinical disorder requiring active treatment. Option B represents poor practice - benzodiazepines like alprazolam can actually worsen PTSD outcomes by interfering with natural fear extinction and increasing dependency risk. Option C is premature and potentially harmful; graded exposure should only be conducted by trained professionals as part of structured therapy, not as self-directed treatment.
For USMLE Step 3, remember that PTSD diagnosis requires symptoms lasting more than one month with functional impairment. Always choose evidence-based treatments: trauma-focused psychotherapy (like CPT or EMDR) is first-line, not medications or reassurance. Watch for questions that tempt you toward benzodiazepines for trauma - they're typically contraindicated.
- Blunt trauma, damage-control laparotomy; 12 h later bladder pressure 22 mm Hg, urine 10 mL/h, peak airway 35. Best next?
Answer: Surgical decompression
A bladder pressure of 22 mm Hg with oliguria and high peak airway pressure after laparotomy indicates abdominal compartment syndrome. The source is intra-abdominal pressure, so fluid or vasopressors only mask the problem while organ injury worsens. Immediate decompressive laparotomy is required. The most tempting wrong choice is an isotonic fluid bolus, but it can increase bowel edema and raise intra-abdominal pressure further.
- A 75-year-old man with a history of stable angina and a prior coronary stent is on postoperative day 3 following a partial nephrectomy for a renal mass. He reports mild epigastric discomfort and new-onset shortness of breath. His blood pressure is 130/80 mmHg and heart rate is 95/min. An ECG shows new T-wave inversions in leads I, aVL, V5, and V6. His initial high-sensitivity troponin is 0.9 ng/mL (reference <0.04 ng/mL).
Answer: Initiate a therapeutic-dose intravenous heparin infusion.
This patient has a perioperative non-ST-elevation myocardial infarction (NSTEMI), characterized by atypical symptoms, new ECG changes, and an elevated troponin level. The management must balance the risk of coronary thrombosis against the high risk of bleeding from the recent partial nephrectomy. Thrombolytics are absolutely contraindicated. Urgent cardiac catheterization is associated with a very high bleeding risk and is typically deferred unless there is hemodynamic instability or refractory ischemia. The standard of care involves medical management, including antiplatelet therapy (aspirin) and anticoagulation (e.g., a heparin infusion), along with beta-blockers and statins, while carefully monitoring for bleeding.
