600 Level Medicine Exam: Respiratory Medicine Briefing Report
Official briefing report compiled directly from the respiratory medicine pre-exam review session. Covers question distribution, topic probabilities, scenario clues, and the clinical passing benchmark.
1. Respiratory Share Across Exam Components
Questions are already finalized. There are no Long Essay Questions (LEQs) in this section. The respiratory component is distributed across four distinct assessments:
| Exam Component | Format | Respiratory Share |
|---|---|---|
| MCQ | Single best answer (one-in-four) | 5 to 8 questions |
| Written (SAQ) | Short answer clinical scenarios (10 total in paper) | About 2 questions |
| OSCE / Picture Test | Clinical, radiograph, and data interpretation stations | About 4 stations |
| Viva Voce | Oral clinical examination | Examiner discretion |
Note: OSCE stations are scored out of 5. A score of 3 or 4 out of 5 is considered a strong passing mark.
2. Topic Likelihood in the MCQ Section
| Topic Area | Likelihood | Key Focus Areas to Master |
|---|---|---|
| COPD | 100% Guaranteed | Spirometry gold standard, centriacinar (smokers) vs. panacinar (alpha-1 antitrypsin deficiency), LTOT criteria. |
| Community-Acquired Pneumonia | 100% Guaranteed | CURB-65 calculation, atypical pathogens (Legionella, Mycoplasma), 3rd-gen cephalosporin + macrolide. |
| Pulmonary Embolism (PE) | 100% Guaranteed | Wells scoring, CTPA gold standard, SBP <90 mmHg thrombolysis vs. stable anticoagulation. |
| Bronchogenic Carcinoma | Near Certain (1–2 Qs) | Squamous cell (central, hypercalcemia) vs. Adenocarcinoma (peripheral, targetable mutations), bedside Horner/SVCO signs. |
| Arterial Blood Gas (ABG) | ~80% Probability | Acidosis vs. alkalosis, respiratory vs. metabolic, compensation state, Type 1 vs. Type 2 failure. |
| Asthma, TB, Pleural Effusion | Highly Likely | ICS-formoterol reliever, Light's criteria, tension pneumothorax decompression (2nd ICS MCL). |
3. Core Topic Review Notes
Asthma: Inhaled Steroid Mandate
Golden Rule: Inhaled Corticosteroid (ICS) is the most critical component of asthma management and is present at every single step.
Preferred first-line therapy is a combined ICS-formoterol inhaler (e.g. budesonide-formoterol) as an anti-inflammatory controller and reliever. SABA alone is never the right answer.
COPD Phenotypes & Diagnosis
Gold Standard: Post-bronchodilator spirometry (FEV1/FVC <0.70).
- Centriacinar: Upper zones, predominantly in cigarette smokers.
- Panacinar: Lower zones, early-onset alpha-1 antitrypsin deficiency.
- Exacerbation: Controlled oxygen (target SpO2 88–92%), nebulizers, systemic steroid.
Pulmonary Embolism Protocols
Gold Standard: CT Pulmonary Angiography (CTPA).
- Haemodynamically Unstable (SBP <90 mmHg): Urgent thrombolysis.
- Haemodynamically Stable: Therapeutic anticoagulation (LMWH / DOAC).
- ECG Signs: Sinus tachycardia (most common), S1Q3T3 pattern.
Pleural Effusion & Procedures
Light's Criteria: Exudate if Pleural/Serum Protein >0.5, Pleural/Serum LDH >0.6, or Pleural LDH >2/3 upper normal serum limit.
Tension Pneumothorax: Immediate needle decompression in the 2nd intercostal space, midclavicular line (or 4th/5th ICS anterior axillary line).
4. How to Spot Clinical Scenario Clues
Examiners deliberately embed paired clues in clinical stems to point to a specific pathology:
| Clinical Stem Clues | Intended Clinical Diagnosis |
|---|---|
| Alcoholic or farmer, seizure disorder, fever, chest pain, copious foul-smelling morning sputum | Suppurative Lung Disease (Lung Abscess) |
| Fever, foul sputum, chest radiograph with thick-walled cavity and visible air-fluid level | Lung Abscess |
| Recurrent chest infections since childhood, copious purulent morning sputum, tram-track / signet-ring HRCT | Bronchiectasis |
| Diffuse 2 to 5 mm seedling-like micro-nodules across both lung fields (word “miliary” omitted) | Miliary Tuberculosis |
| Chest pain, dyspnoea, feeling of impending doom, heavy smoker with cardiovascular risk factors | Myocardial Infarction (PE is differential) |
| Significant weight loss, fever, chronic smoking history, older adult patient | Lung Carcinoma vs. Pulmonary TB |
5. Written SAQ Formula & Scoring Traps
SAQs follow a rigid four-part sequence: (1) Most Likely Diagnosis → (2) Four to Five Investigations → (3) Treatment → (4) Complications.
Diagnostic Cascade Warning
The primary diagnosis carries the gatekeeper mark. An incorrect primary diagnosis causes examiners to score all subsequent therapeutic and complication points as zero. Read every clinical detail before writing.
When instructions state “list”, “highlight”, or “enumerate”, format your answer in concise bullet points. Avoid essay-style paragraphs.
6. HIV Complications & Clinical Passing Rules
HIV: Only Four Complication Areas
Examiners will only examine these four systemic complication categories:
- Dermatological: Can appear as a standalone full question (Kaposi, PPE, zoster).
- Respiratory: PCP, pulmonary TB, bacterial pneumonia.
- Gastrointestinal: Esophageal candidiasis, chronic diarrhea.
- Neurological: Cryptococcal meningitis, cerebral toxoplasmosis.
The Clinical Passing Rule
You must pass both theory and clinicals independently. Clinicals comprise 50% (OSCE + Viva) alongside the M3 clinical exam.
The Board of Examiners may condone a minor theory shortfall (~1.5 marks). However, a failure in clinicals is absolute and cannot be condoned under any circumstances.