MCCQE Part 1 MCCQE Medical Council of Canada Study Notes

In discussions about end-of-life care, it is critical to shift the focus from the substitute decision-maker’s own feelings to what the patient would have wanted. This approach promotes ethically sound and patient-centered decisions. It is respectful, supportive, and maintains trust.

Toronto Notes 2023 – ELOM, “Advance Care Planning and End-of-Life Decisions”:

“When a patient cannot express wishes, decisions must be based on known prior wishes or substituted judgment—what the patient would have wanted.”

MCCQE1 Objectives (ELOM > 90-2: Capacity, Consent, and End-of-Life Care):

“Candidates must guide surrogate decision-makers toward reflecting on the patient’s values and previously expressed wishes.”

Options A and B are inappropriate—waiting without engagement or unilateral withdrawal is unethical. C does not address the wife’s emotional or ethical concerns. E is premature unless the wife is clearly unable or unfit to act as decision-maker.

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This patient is critically unstable with severe hypoxia (SpO₂ 75% despite oxygen), central cyanosis, hypotension (no detectable blood pressure), and evidence of active vomiting—placing him at extremely high risk of airway compromise and aspiration . According to MCCQE resuscitation objectives and ABC principles, airway management is the immediate priority in a patient with respiratory failure and compromised airway protection.

Endotracheal intubation provides definitive airway control, allows suctioning of vomitus, prevents further aspiration, and enables mechanical ventilation with high-concentration oxygen. Noninvasive ventilation is contraindicated in patients with vomiting and impaired airway protection due to high aspiration risk. Chest compressions are indicated only if there is no pulse; this patient has a faint pulse. Intravenous fluids are important for hypotension but must follow airway stabilization. Nasogastric tube insertion does not address the immediate life-threatening hypoxia.

Early definitive airway control in unstable patients with hypoxemia and aspiration risk is essential to prevent cardiac arrest and improve survival outcomes.

This presentation best fits osteomyelitis, likely subacute given the 2-week course and radiographic metaphyseal sclerosis. MCCQE objectives stress that fever, systemic malaise, and elevated inflammatory markers (CRP above normal) with localized limb pain/limp should prompt consideration of bone infection even if the child can still weight-bear. Osteomyelitis in children commonly involves the metaphysis of long bones due to vascular anatomy; early x-rays may be normal, but with time they can show periosteal reaction or sclerosis. In contrast, transient synovitis typically occurs after a viral illness, is usually afebrile or minimally febrile, and inflammatory markers are often normal. Legg-Calvé-Perthes is classically age 4–8 and affects the femoral epiphysis/head with avascular necrosis changes rather than metaphyseal sclerosis and systemic illness. SCFE presents in adolescents with limp and limited internal rotation/obligate external rotation, usually without fever or elevated CRP, and x-ray shows epiphyseal slip. An undisplaced fracture would usually have trauma history and not systemic features.

Comprehensive and Detailed Explanation:

The combination of upper extremity hypertension and weak femoral pulses is classic for aortic coarctation. A soft systolic murmur may be present. This condition often becomes apparent during routine screening in school-aged children.

Toronto Notes 2023 – Pediatrics / Cardiology:

“Coarctation of the aorta presents with upper limb hypertension, diminished femoral pulses, and sometimes a systolic murmur. BP discrepancy is key.”

MCCQE1 Objectives (Pediatrics > 78-1: Congenital Heart Disease):

“Candidates must recognize signs of aortic coarctation, including weak lower limb pulses and systemic hypertension in children.”

VSD (A) typically presents with a louder murmur. Reflux nephropathy (B) may cause hypertension but without femoral pulse discrepancy. Renal artery thrombosis (C) is rare. Essential hypertension (D) is less likely in this age group with these findings.

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