MCCQE Exam Dumps - Medical Council of Canada MCCQE Part 1 Questions and Answers

The patient’s pain is no longer medically justified for opioids, but there is no evidence of misuse. The most appropriate and supportive action is to explain concerns, provide education about opioid tapering or dependency, and transition care to her family physician for ongoing management.

Toronto Notes 2023 – ELOM, “Safe Prescribing and Opioid Stewardship” Section:

“When opioids are no longer indicated, engage the patient in a conversation about tapering and arrange appropriate follow-up. Coordinate care with primary providers when long-term management is needed.”

MCCQE1 Objectives (ELOM > 99-1: Professionalism and Substance Use):

“Candidates must address the risk of dependency, counsel the patient, and ensure a safe transition to appropriate care without abrupt termination.”

Methadone (E) and fentanyl (A) are for opioid use disorder or chronic pain, not for tapering in low-risk patients. Discharging the patient (B) or reporting (C) is punitive and unnecessary.

A low-lying placenta identified at the routine 20-week anatomy scan is common and often resolves as the pregnancy progresses. As the uterus enlarges, the lower uterine segment stretches and the placenta typically “migrates” upward relative to the internal cervical os. Therefore, immediate intervention is not indicated in an asymptomatic patient. The appropriate next step is repeat ultrasonography in the third trimester, commonly around 32 weeks’ gestation, to reassess placental location. Early recommendation of cesarean delivery is premature because many low-lying placentas identified at mid-pregnancy resolve before term. Routine activity restriction or stopping work is not indicated in the absence of bleeding. Acupuncture has no evidence-based role in placental positioning. While placenta previa is associated with painless third-trimester bleeding, at 20 weeks most cases are transient findings. MCCQE objectives emphasize appropriate follow-up of incidental ultrasound findings, avoidance of unnecessary interventions, patient reassurance, and evidence-based monitoring in obstetric care.

This infant likely has infantile colic, defined by the “rule of 3s”: crying > 3 hours per day, > 3 days per week, for > 3 weeks, usually starting in the first few months of life. It is benign and self-limited, typically resolving by 3–4 months of age.

Toronto Notes 2023 – Pediatrics, “Common Concerns in Infancy”:

“Colic is self-limited. No routine testing is required in healthy, thriving infants. Reassurance and support for parents are key.”

MCCQE1 Objectives (Pediatrics > 78-1: Behavioral Pediatrics):

“Candidates must recognize normal variations such as colic and avoid unnecessary interventions. Counseling and reassurance are essential.”

Sedatives (D) are contraindicated. Investigations (C) are unnecessary without red flags. Resolution (B) usually occurs by 3–4 months, not as late as 12 months.

The audiogram pattern of bilateral high-frequency sensorineural hearing loss with a 4000 Hz “notch” is classic for noise-induced hearing loss (NIHL) . MCCQE objectives in occupational health emphasize recognizing NIHL as a common, preventable condition caused by chronic exposure to loud sounds, especially in workplaces such as construction, mining, and manufacturing. The 4 kHz notch occurs because this frequency region is particularly vulnerable to cochlear hair-cell damage from acoustic trauma; over time, loss can widen to adjacent frequencies and impair speech discrimination, especially in noisy settings—matching the patient’s complaint.

Among the options, 20 years of construction work best represents sustained occupational noise exposure and is most likely to produce this characteristic bilateral pattern. Firearm exposure at a range can also cause NIHL, but episodic seasonal practice is generally less consistent than long-term daily occupational exposure for producing this typical presentation. Childhood ear infections mainly cause conductive loss, hereditary causes vary and are not defined by a 4 kHz notch, and diabetes does not produce this specific audiometric signature.

This patient has life-threatening complications of missed dialysis , including severe hyperkalemia (K⁺ 7.1 mmol/L), metabolic acidosis (HCO₃⁻ 11 mmol/L), volume overload with pulmonary edema (hypoxia, crackles, elevated JVP), and altered mental status. MCCQE objectives emphasize immediate recognition and treatment of emergent indications for dialysis (AEIOU: Acidosis, Electrolyte abnormalities, Intoxication, Overload, Uremia) . This patient meets multiple criteria—particularly refractory hyperkalemia and pulmonary edema—requiring urgent hemodialysis .

In emergencies where delay would risk death or serious harm, treatment proceeds under implied consent , even if the patient is confused and capacity is uncertain. Contacting family or psychiatry would dangerously delay life-saving care. While temporizing measures (e.g., IV calcium, insulin/glucose) may be given, definitive management is emergent dialysis. Morphine and furosemide alone are inadequate in severe renal failure with life-threatening hyperkalemia. Therefore, immediate initiation of urgent dialysis is the correct next step.

MCCQE ELOM objectives stress that physicians must prescribe controlled substances responsibly, use evidence-based pain management, and maintain professional boundaries despite pressure or threats of complaints. A threat to complain does not obligate opioid prescribing, especially in a patient with opioid use disorder where opioids increase risk of relapse, overdose, and diversion. The appropriate response is to remain calm, document the assessment and rationale, and ensure the patient is offered safe alternatives and continuity of care. Directing him to his methadone maintenance program is best because it supports coordinated management within an established addiction-treatment framework (often with structured monitoring, agreements, and access to addiction/pain expertise).

Prescribing “a small amount” or giving an injection undermines safe prescribing practices and reinforces drug-seeking behavior. Calling police is reserved for immediate safety threats, not dissatisfaction. Lumbar radiography is not the next step unless red flags are present; it does not address the ethical issue. Coordinated care with the methadone program and non-opioid strategies is the safest, most appropriate action.

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This patient has classic features of proximal deep vein thrombosis (DVT) after recent major pelvic surgery: acute unilateral leg swelling with pitting edema and a significant calf circumference difference ( > 3 cm). The edema extending from foot to groin strongly suggests a proximal (iliofemoral) thrombosis, which produces more extensive swelling than calf-vein DVT because venous outflow from the entire limb is impaired. MCCQE objectives highlight postoperative patients as high risk for venous thromboembolism due to immobility, endothelial injury, and hypercoagulability.

Superficial thrombophlebitis typically causes a localized, tender, palpable cord along a superficial vein rather than diffuse whole-leg edema. Phlegmasia cerulea dolens is a severe, limb-threatening form of massive DVT characterized by marked pain, tense

This ABG reveals primary respiratory acidosis (↓pH, ↑PaCO₂, normal HCO₃), likely from hypoventilation due to postoperative pain, sedation, or narcotics. PaO₂ is also low, suggesting inadequate oxygenation.

Toronto Notes 2023 – Respiratory, “Postoperative Respiratory Complications”:

“Postoperative respiratory acidosis results from hypoventilation, often due to pain, sedatives, or poor respiratory effort. Assess airway, breathing, and support oxygenation.”

MCCQE1 Objectives (Internal Medicine > 44-3: Acid-Base Disturbances):

“Candidates must recognize respiratory acidosis on ABG and relate findings to common postoperative complications.”

Metabolic acidosis (C) would show ↓HCO₃. Compensated alkalosis (D) would show opposite ABG changes. Hypermetabolic states increase respiratory drive, not decrease it.

At the end of life, decreasing consciousness and unresponsiveness are common and expected physiologic changes. MCCQE ELOM objectives emphasize prioritizing patient comfort, respecting goals of care, and communicating clearly with families about prognosis and the dying process. The best next step is to explain that her reduced level of consciousness is most consistent with imminent dying and that she is unlikely to have the decision-making capacity required to execute legal documents (capacity requires understanding and appreciation of the decision and its consequences).

Withholding morphine to attempt to increase alertness risks causing pain and dyspnea, violating the duty to relieve suffering. Administering naloxone is inappropriate because it may precipitate acute pain and distress and is not indicated when opioids are being used appropriately for symptom control. A legal opinion or ethics consult may be considered later if conflict persists, but the immediate priority is compassionate communication, clarifying that “waking her to sign” is unlikely feasible or ethically justified, and supporting the son through anticipatory grief while continuing comfort-focused care.

This patient exhibits perfectionism, preoccupation with order and control, and reluctance to delegate — classic features of obsessive-compulsive personality disorder (OCPD). Unlike OCD, there are no intrusive thoughts or compulsions; rather, behaviors are ego-syntonic.

Toronto Notes 2023 – Psychiatry, Personality Disorders:

“OCPD is marked by perfectionism, rigidity, and preoccupation with productivity. It differs from OCD in lacking obsessions or compulsions.”

MCCQE1 Objectives – Psychiatry > Personality Disorders:

“Candidates must distinguish OCPD by traits of excessive perfectionism, control, and inflexibility, particularly when these interfere with functioning.”

Major depression (A) is marked by pervasive low mood, which is not reported. OCD (B) involves distressing obsessions and compulsions. GAD (C) is more generalized worry without the perfectionism and rigidity.

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