IM3.4-6 | Pneumonia Clinical Evaluation — Summary & Reflection

KEY TAKEAWAYS

Clinical indication: Suspect pneumonia in any patient with fever + cough + breathlessness ± pleuritic chest pain. Atypical presentations (confusion, falls in elderly; dry cough + extrapulmonary features for atypical pathogens) must not be missed. Always assess immune status, aspiration risk, hospitalisation history, and vaccination.

History framework: HPC (onset, sputum quality, fever pattern, pleuritic pain, haemoptysis) → systemic symptoms (confusion = CURB-65; GI/neuro features = Legionella) → immune status (HIV, steroids, diabetes) → aspiration risk → structural lung disease → prior hospitalisation (90-day HAP criterion) → medications/prior antibiotics → social history (smoking, alcohol, occupation, TB contacts, travel).

Examination sequence: Vital signs first (RR is most sensitive — count for 30 seconds; SpO2 on room air; BP; temperature; mental status). General: cyanosis, clubbing, lymphadenopathy. Chest: inspect (movement asymmetry, accessory muscles) → palpate (trachea position, tactile fremitus) → percuss (dullness over consolidation/effusion) → auscultate (bronchial breathing + increased vocal resonance + whispering pectoriloquy = consolidation; reduced sounds + reduced resonance = effusion).

Complications on examination: Effusion → shifting dullness + reduced sounds; septic shock → hypotension + tachycardia + altered consciousness; respiratory failure → RR ≥30, SpO2 <90%, accessory muscle use.

Differential (prioritised in India): (1) CAP/HAP/aspiration pneumonia; (2) Pulmonary TB (subacute, upper lobe, constitutional features, antibiotic non-response — always rule out); (3) Post-obstructive pneumonia from malignancy (smoker, recurrent same-lobe); (4) Acute pulmonary oedema (bilateral, known HF, responds to diuretics); (5) Pulmonary embolism with infarction (Wells score, haemoptysis, risk factors); (6) COP (migratory, non-responsive, requires steroids).

REFLECT

Go back to the opening scenario — the breathless 58-year-old woman who arrives alone by autorickshaw. You now have a framework for what to do in those first 90 seconds: take the respiratory rate (count it), check SpO2, assess mental status (CURB-65 points that can be extracted in under one minute), note whether she is using accessory muscles, and listen for bronchial breathing over a consolidated segment. That brief structured assessment tells you the diagnosis, the severity, and the site of care — before any investigation is ordered. Think about how you would explain to a junior student the difference between the chest findings of consolidation and effusion, in one sentence each, using only what you have just learned. The ability to teach a concept clearly is itself a test of understanding — and in clinical medicine, clear communication of examination findings to your seniors is what keeps patients safe.