Independent NAC OSCE preparation by BoardQBank
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Adult medicine — complete topic guide

AKI, CKD, hematuria and electrolytes

Turn this presentation into an 11-minute OSCE performance: focused assessment, prioritized differential, targeted examination and investigations, immediate management, communication, disposition and safety-netting.

What you must demonstrate

  • Focused history with relevant negatives
  • Targeted cardiovascular, respiratory, abdominal and neurologic examination
  • Prioritized differential diagnosis
  • Initial investigations and interpretation
  • Immediate stabilization plus disposition
Do not miss: Hemodynamic instability · Hypoxia or respiratory fatigue · Acute focal neurologic deficit · Sepsis or meningism · Major bleeding · Severe electrolyte disturbance

11-minute performance map

0:00–0:45

1. Opening and immediate safety

Introduce yourself, confirm identity, explain the task, obtain consent and identify instability before routine questioning.

0:45–4:30

2. Focused assessment

Clarify onset, progression, severity, associated features, discriminating positives/negatives and the most relevant background risks.

4:30–6:30

3. Targeted examination

Perform only the examination maneuvers needed to assess severity, confirm localization and discriminate the leading diagnoses.

6:30–7:30

4. Synthesize

Give a one-sentence summary, leading diagnosis and two to four prioritized alternatives including the dangerous diagnosis you cannot miss.

7:30–8:40

5. Investigations

Choose tests that answer a specific diagnostic or safety question; state urgent tests first.

8:40–10:15

6. Immediate management

Treat instability, begin syndrome-specific care, consult early when needed and define disposition.

10:15–11:00

7. Communication and safety net

Explain the plan, check understanding, address concerns and state exact deterioration/return criteria.

Focused history prompts

Define the presentation

  • Onset, chronology, triggers and progression.
  • Severity and effect on function.
  • Associated symptoms that support the leading diagnosis.
  • Relevant negatives that reduce dangerous alternatives.

Risk context

  • Relevant past medical/surgical/obstetric/psychiatric history.
  • Medications, allergies and adherence.
  • Family, social, substance, travel/exposure or safeguarding factors as applicable.
  • Patient ideas, concerns, expectations and goals.

Dangerous alternatives to prioritize

  1. Hemodynamic instability
  2. Hypoxia or respiratory fatigue
  3. Acute focal neurologic deficit
  4. Sepsis or meningism
  5. Major bleeding
  6. Severe electrolyte disturbance

Targeted investigations

Focused bedside observations and ECG/point-of-care tests when indicated

CBC, electrolytes/renal function, glucose and targeted biochemical tests

Disease-specific imaging or physiologic testing based on the leading differential

Microbiology/cultures when infection is plausible and results will change management

Immediate management and disposition

  1. Stabilize ABC problems first and treat immediately reversible threats.
  2. Start evidence-based initial therapy matched to severity and contraindications.
  3. Consult the appropriate service early when the diagnosis is time-sensitive or high-risk.
  4. State disposition, reassessment plan, follow-up and explicit return precautions.
High-yield closing sentence: “I would reassess after the initial intervention, escalate if there is deterioration, explain the plan in plain language, confirm understanding and give specific safety-net instructions.”

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