Senior-clinician companion to introductory General Medicine notes. Educational use only; current local emergency pathways and guidelines take precedence.
A Word From Your Senior
The mature physician is not the person who names a disease fastest. It is the person who recognises instability, builds a defensible differential, tests it efficiently, notices disconfirming evidence, and revises the plan without ego.
Start With Severity
Before a complete history, identify immediate threats using a structured primary survey appropriate to the setting. Abnormal airway, breathing, circulation, consciousness, or rapidly evolving physiology demands simultaneous assessment, treatment, escalation, and reassessment.
History, examination, and investigations are iterative, not a rigid one-way sequence. History is often diagnostically powerful, but claims that it provides a fixed percentage of diagnoses should not be treated as universal. Signs do not "prove" a diagnosis; all findings modify probability in context.
Build a Useful Differential
Represent the problem in one sentence using age, time course, key syndrome, severity, and relevant context. Then organise possibilities by mechanism and priority:
- immediately dangerous and treatable;
- common and likely;
- important alternatives suggested by context;
- iatrogenic, toxicological, metabolic, and functional causes.
Use tests to answer a question, not to replace one. Interpret each result through pre-test probability, sensitivity, specificity, likelihood, timing, and consequences of false reassurance or false alarm.
Bedside Case
A patient presents with chest pain. In parallel, assess stability and evaluate acute coronary syndrome, aortic catastrophe, pulmonary embolism, pneumothorax, and other emergencies while considering gastrointestinal, musculoskeletal, and psychological causes. "It improved with antacid" does not safely exclude myocardial ischaemia. Serial assessment matters because early examination, ECG, or biomarkers may be non-diagnostic.
Chronic Disease Is Not a Quiet Problem
Diabetes, hypertension, asthma, and multimorbidity require risk reduction, treatment targets individualised to the patient, adherence support, complication screening, and attention to social constraints. Lifestyle intervention is valuable but is not automatically more effective than medicine, and language must never imply blame.
Accuracy Guardrails
- Symptoms are subjective experiences; signs are observed findings. Neither category automatically proves disease.
- "Rule out the worst first" means prioritise by probability, consequence, and test/treatment urgency, not order every possible test.
- Acute and chronic processes can coexist; chronic illness can deteriorate acutely.
- Diagnostic timeouts and medication reconciliation prevent anchoring and iatrogenic harm.
- Safety-net advice must specify what to watch for, what to do, and how urgently.