Chronic Pediatric Conditions
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USMLE Step 2 CK › Chronic Pediatric Conditions
An 8-year-old boy with repaired Tetralogy of Fallot has 2 months of reduced exercise tolerance. Echocardiogram shows right ventricular outflow tract dilation and moderate pulmonary regurgitation. He participates in sports without symptoms at rest. Which of the following is the most appropriate adjustment to the current treatment plan?
Start inhaled bronchodilators for presumed asthma-related exercise intolerance
Recommend complete bed rest for 4 weeks to reverse right ventricular dilation
Defer cardiology follow-up until adulthood if oxygen saturation is normal
Refer for evaluation of pulmonary valve intervention based on symptoms and right ventricular changes
Begin chronic anticoagulation without evidence of arrhythmia or thrombosis
Explanation
This question tests USMLE Step 2 CK competencies in managing chronic pediatric conditions, focusing on repaired Tetralogy of Fallot. Effective management involves referral for valve intervention assessment. In this vignette, reduced exercise tolerance, RV dilation, moderate regurgitation, and sports participation highlight the management challenges and considerations for repaired Tetralogy of Fallot. Choice A is correct because it aligns with current clinical guidelines for evaluating symptomatic regurgitation. Choice C is incorrect because deferring follow-up risks progression. To improve understanding, clinicians should monitor for surgical indications, focusing on key management principles like activity guidance and imaging.
A 12-year-old girl with type 1 diabetes has 2 weeks of early-morning hypoglycemia (55–65 mg/dL). HbA1c is 7.4%. She recently increased evening physical activity and eats a smaller dinner. She takes glargine at bedtime and rapid-acting insulin with meals; adherence is good. Which medication should be initiated or adjusted?
Add sulfonylurea to reduce insulin requirements
Reduce basal insulin dose and reassess overnight glucose trends with more frequent monitoring
Stop all insulin for 24 hours to reset insulin sensitivity
Switch to sliding-scale insulin only without basal coverage
Increase bedtime glargine dose to prevent nocturnal lows
Explanation
This question tests USMLE Step 2 CK competencies in managing chronic pediatric conditions, focusing on type 1 diabetes. Effective management involves basal insulin adjustments based on trends. In this vignette, morning hypoglycemia, good HbA1c, increased activity, and smaller dinners highlight the management challenges and considerations for type 1 diabetes. Choice B is correct because it aligns with current clinical guidelines for reducing basal dose to prevent lows. Choice A is incorrect because increasing glargine would worsen hypoglycemia. To improve understanding, clinicians should review logs frequently, focusing on key management principles like activity adjustments and overnight monitoring.
A 14-year-old girl with stage 3 CKD has 3 months of worsening pruritus and bone aches. Labs: phosphorus 6.5 mg/dL, Ca 8.4 mg/dL, PTH elevated; creatinine stable. She admits skipping phosphate binders because they are “too many pills,” and her diet is high in cola and packaged snacks. What is the next best step in management?
Reinforce low-phosphate diet, optimize phosphate binder adherence, and coordinate with a renal dietitian
Start high-dose vitamin A supplementation for pruritus
Recommend increased dietary phosphate intake to improve bone health
Order emergent dialysis solely for elevated phosphorus with stable kidney function
Stop all binders and treat symptoms with antihistamines only
Explanation
This question tests USMLE Step 2 CK competencies in managing chronic pediatric conditions, focusing on chronic kidney disease (CKD). Effective management involves dietary control and binder adherence for hyperphosphatemia. In this vignette, pruritus, bone aches, elevated phosphorus, PTH, skipped binders, and high-phosphate diet highlight the management challenges and considerations for CKD. Choice B is correct because it aligns with current clinical guidelines for low-phosphate diet and binder optimization. Choice A is incorrect because increasing phosphate worsens bone disease. To improve understanding, clinicians should involve dietitians for counseling, focusing on key management principles like electrolyte monitoring and symptom management.
A 12-year-old girl with type 1 diabetes reports frequent hypoglycemia during afternoon soccer practices for 1 month. Glucose logs show lows (50–70 mg/dL) after practice; HbA1c 7.9%. She takes rapid-acting insulin with lunch at school and often cannot finish her meal due to short lunch period. What is the most appropriate adjustment to the current treatment plan?
Stop basal insulin on practice days
Increase lunchtime bolus insulin to prevent postprandial hyperglycemia
Reduce or delay pre-exercise bolus insulin and ensure a carbohydrate snack before activity
Recommend skipping soccer to avoid hypoglycemia
Add metformin as first-line therapy for exercise-related hypoglycemia
Explanation
This question tests USMLE Step 2 CK competencies in managing chronic pediatric conditions, focusing on type 1 diabetes. Effective management involves insulin adjustments for activity and nutrition. In this vignette, hypoglycemia during soccer, postprandial lows, and short lunch periods highlight the management challenges and considerations for type 1 diabetes. Choice B is correct because it aligns with current clinical guidelines for reducing pre-exercise insulin and adding snacks. Choice E is incorrect because skipping activity limits physical health benefits. To improve understanding, clinicians should teach glucose monitoring around exercise, focusing on key management principles like individualized dosing and school coordination.
A 14-year-old girl with stage 3 CKD has 1 month of worsening anemia symptoms (fatigue, reduced concentration). Labs: Hb 9.2 g/dL, ferritin low, transferrin saturation low; creatinine stable. She follows a vegetarian diet and often misses iron due to nausea. What is the next best step in management?
Treat iron deficiency with tolerated iron regimen and dietary counseling before considering erythropoiesis-stimulating therapy
Start erythropoietin immediately without addressing iron deficiency
Recommend avoiding all protein to improve kidney function and anemia
Stop ACE inhibitor because it is the most likely cause of iron deficiency
Order emergent dialysis to correct anemia
Explanation
This question tests USMLE Step 2 CK competencies in managing chronic pediatric conditions, focusing on chronic kidney disease (CKD). Effective management involves correcting iron deficiency before advanced therapies. In this vignette, anemia symptoms, low Hb, iron indices, stable creatinine, vegetarian diet, and missed iron due to nausea highlight the management challenges and considerations for CKD. Choice B is correct because it aligns with current clinical guidelines for treating iron deficiency first. Choice A is incorrect because starting erythropoietin without iron ignores the primary cause. To improve understanding, clinicians should provide tolerable iron options, focusing on key management principles like nutritional counseling and anemia staging.
A 12-year-old girl with type 1 diabetes has 2 months of wide glucose swings (50–350 mg/dL) and fatigue; HbA1c 9.4%. She often skips breakfast, counts carbs inconsistently, and avoids bolusing at school due to embarrassment. She uses basal glargine nightly and rapid-acting insulin with meals but misses lunchtime doses 3–4 days/week. What is the next best step in management?
Order abdominal CT to evaluate for pancreatitis as a cause of hyperglycemia
Initiate a structured diabetes education plan with school support and adjust bolus dosing based on carb counting
Recommend a strict low-carbohydrate diet without insulin changes
Stop mealtime insulin and use sliding-scale insulin only
Decrease basal insulin dose by 20% to reduce hypoglycemia risk
Explanation
This question tests USMLE Step 2 CK competencies in managing chronic pediatric conditions, focusing on type 1 diabetes. Effective management involves insulin therapy, carbohydrate counting, education, and addressing psychosocial barriers. In this vignette, wide glucose swings, high HbA1c, skipped meals, inconsistent carb counting, and school embarrassment highlight the management challenges and considerations for type 1 diabetes. Choice C is correct because it aligns with current clinical guidelines for structured education and school support to improve adherence and bolus dosing. Choice A is incorrect because decreasing basal insulin would not address the root causes of swings from missed boluses and poor carb counting. To improve understanding, clinicians should involve multidisciplinary teams for education and psychosocial support, focusing on key management principles like consistent monitoring and individualized plans. Additionally, empowering patients with school accommodations can enhance long-term control.
A 14-year-old girl with stage 3 CKD has 2 months of poor growth and low energy. Labs: HCO3− 16 mEq/L, K 5.2 mEq/L; creatinine stable. She dislikes sodium bicarbonate tablets and often skips them. Family reports limited funds for alternative formulations. What is the most appropriate adjustment to the current treatment plan?
Increase dietary acid load with high-protein supplements to boost growth
Start chronic NSAIDs to improve appetite and energy
Stop all CKD medications because growth issues are unrelated
Treat metabolic acidosis by improving alkali therapy adherence using a tolerable regimen and close follow-up
Order emergent dialysis solely for bicarbonate of 16 mEq/L
Explanation
This question tests USMLE Step 2 CK competencies in managing chronic pediatric conditions, focusing on chronic kidney disease (CKD). Effective management involves optimizing alkali therapy for acidosis. In this vignette, poor growth, low energy, low bicarbonate, stable creatinine, skipped tablets, and limited funds highlight the management challenges and considerations for CKD. Choice A is correct because it aligns with current clinical guidelines for improving adherence to correct acidosis. Choice B is incorrect because increasing acid load worsens growth issues. To improve understanding, clinicians should explore alternative formulations, focusing on key management principles like growth monitoring and cost-effective care.
An 8-year-old boy with repaired Tetralogy of Fallot is asymptomatic but has missed follow-up for 2 years. Echocardiogram now shows moderate pulmonary regurgitation and mild right ventricular enlargement. Parents report difficulty understanding prior instructions. What is the most appropriate adjustment to the current treatment plan?
Schedule regular congenital cardiology surveillance and provide clear, language-appropriate follow-up instructions
Start daily digoxin for pulmonary regurgitation
Begin empiric antibiotics for endocarditis prophylaxis daily
No further follow-up is needed if the child feels well
Recommend complete sports restriction for life without additional assessment
Explanation
This question tests USMLE Step 2 CK competencies in managing chronic pediatric conditions, focusing on repaired Tetralogy of Fallot. Effective management involves regular surveillance and clear communication. In this vignette, asymptomatic status, missed follow-up, moderate regurgitation, RV enlargement, and instruction misunderstandings highlight the management challenges and considerations for repaired Tetralogy of Fallot. Choice B is correct because it aligns with current clinical guidelines for lifelong cardiology monitoring. Choice A is incorrect because ongoing follow-up is essential despite well-being. To improve understanding, clinicians should use simple language and reminders, focusing on key management principles like complication prevention and patient education.
An 8-year-old boy with repaired Tetralogy of Fallot reports intermittent palpitations for 3 weeks and one near-syncope episode during recess. Echocardiogram is unchanged from prior; oxygen saturation is normal. Family reports difficulty attending visits due to unreliable transportation. Which of the following tests should be performed to assess the patient's condition?
Routine urinalysis to evaluate for kidney disease as the primary cause
No testing is needed if echocardiogram is unchanged
Ambulatory ECG monitoring to evaluate for ventricular arrhythmias
Chest CT to evaluate for pulmonary embolism as the likely cause
Abdominal ultrasound to evaluate for dehydration
Explanation
This question tests USMLE Step 2 CK competencies in managing chronic pediatric conditions, focusing on repaired Tetralogy of Fallot. Effective management involves arrhythmia evaluation in symptomatic patients. In this vignette, palpitations, near-syncope, stable echo, and transportation barriers highlight the management challenges and considerations for repaired Tetralogy of Fallot. Choice A is correct because it aligns with current clinical guidelines for ambulatory ECG to detect ventricular arrhythmias. Choice E is incorrect because testing is warranted despite stable echo given symptoms. To improve understanding, clinicians should facilitate access to monitoring, focusing on key management principles like rhythm surveillance and prompt intervention.
An 8-year-old boy with repaired Tetralogy of Fallot presents for routine follow-up. Over 6 months he has reduced exercise tolerance and mild palpitations. Echocardiogram shows severe pulmonary regurgitation with right ventricular dilation; oxygen saturation 98% at rest. He takes no daily cardiac medications and has missed two cardiology visits due to transportation issues. What is the next best step in management?
Arrange timely cardiology evaluation for pulmonary valve replacement consideration and obtain ambulatory rhythm monitoring
Reassure and schedule follow-up in 2 years because resting oxygenation is normal
Order chest CT angiography as the first test to evaluate palpitations
Start daily furosemide and restrict all physical activity indefinitely
Begin aspirin therapy solely to improve exercise tolerance
Explanation
This question tests USMLE Step 2 CK competencies in managing chronic pediatric conditions, focusing on repaired Tetralogy of Fallot. Effective management involves lifelong cardiology surveillance, monitoring for complications like pulmonary regurgitation, and addressing access barriers. In this vignette, reduced exercise tolerance, palpitations, severe pulmonary regurgitation, RV dilation, and missed visits due to transportation highlight the management challenges and considerations for repaired Tetralogy of Fallot. Choice C is correct because it aligns with current clinical guidelines for timely evaluation for valve replacement and rhythm monitoring in symptomatic patients. Choice A is incorrect because reassurance without intervention ignores progressive symptoms and risks further deterioration. To improve understanding, clinicians should emphasize regular follow-up and symptom recognition, focusing on key management principles like early intervention for arrhythmias and valvular issues.