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Paediatrics ST1 · Clinical Reasoning

Paediatrics ST1 Clinical Reasoning interview guide

The entry-level task rewards a clear safe method and recognition of limits. Specialist recall is less useful than identifying the sick child, acting, reassessing and escalating.

Last verified: 30 October 2026Parent guide: Paediatrics ST1

The published 2027–28 guide confirms a Paediatric Clinical Reasoning domain of up to ten minutes, worth 40 marks across two assessors. It is set at UK F2-equivalent level and does not require prior paediatric experience. Teaching additions: sources checked on 14 October 2026; the inherited article retains its existing verification date.

ContentsHow to approach it

How to approach it

What a strong answer needs to show

Start with acuity and context

Before naming diagnoses, decide whether the child needs immediate resuscitation, urgent senior review or a stable structured assessment.

  • Use an age-appropriate ABCDE assessment and treat threats as they are found.
  • Ask for weight, observations, trajectory and relevant comorbidity.
  • Take parental or nursing concern seriously even when a single number looks reassuring.

Build a useful differential

Prioritise likely diagnoses, dangerous alternatives and causes that change immediate management.

  • Connect each important diagnosis to a finding or test.
  • Include age, development, medication and safeguarding where relevant.
  • Avoid an encyclopaedic list that does not guide action.

Make the plan executable

Say what you would do now, who would help, what you would monitor and when the plan changes.

  • Use local or national guidance for drug doses rather than guessing from memory.
  • Allocate tasks with closed-loop communication.
  • State the reassessment point and escalation threshold.

Show limits and wider safety

Safe paediatric practice includes family, safeguarding and system factors alongside physiology.

  • Call the registrar or consultant early when deterioration, uncertainty or treatment failure warrants it.
  • Consider senior safeguarding advice without conducting an unsupported investigation.
  • Plan handover, documentation, admission, transfer or discharge safety-netting.

Use a change in the child to revise your assessment

Brief fictional illustration: earlier observations were reassuring, but the child is now quieter and a parent says they are harder to wake. Repeating the earlier score does not assess this change.

  • Reassess the child now, including an age-appropriate ABCDE assessment when critical illness is suspected, and call appropriate help early. Do not wait to complete a differential before addressing immediate threats.
  • Distinguish what was observed from what it might mean. Establish usual behaviour, the timing of the change and current observations; do not import adult normal ranges.
  • Explain which new finding changes urgency or the working explanation. If the child is stable, there is more room for a focused history; deterioration changes the order of work.
  • Before waiting for a result, ask whether it could alter the immediate plan or disposition. Agree who will review it and when; a request alone does not ensure the result reaches the decision-maker.

Original practice questions

Questions worth practising aloud

These are original preparation prompts written around published domains and entry-level expectations. They are not recalled interview questions.

  1. A four-year-old with wheeze is tiring despite initial treatment. Talk through your immediate approach.
  2. A febrile child is less interactive and has delayed capillary refill. How would you assess and manage the situation?
  3. A parent says their child is deteriorating although the recorded observations are unchanged. What would you do?
  4. A young person presents after self-harm with abdominal pain. How would you structure the assessment and keep them safe?
  5. A newborn is unexpectedly blue after delivery. Describe your first actions and escalation.

Common mistakes

Where otherwise good answers lose clarity

  • Leading with a long differential before assessing immediate danger.
  • Reciting an exact drug dose when the safer answer is to check a trusted weight-based source.
  • Saying 'call the registrar' without starting appropriate assessment or treatment.
  • Ignoring parental, nursing or safeguarding information.
  • Giving a discharge plan without reassessment or safety-netting.

Preparation plan

How to practise this deliberately

  • Practise common presentations using the same acuity-to-reassessment sequence.
  • Say age, weight, senior help and dose-checking aloud where relevant.
  • Ask colleagues to interrupt with a change in observations or new information.
  • Keep management within F2-level competence and make limits explicit.
  • Review local escalation, safeguarding and retrieval pathways before clinical work.

Continue into practice

Practise the answer, not just the reading

Spoken Paediatrics ST1 practice is launching soon. At launch, choose a Question bank prompt, work on your answer and use structured feedback to improve it. Explore the practice experience while you prepare with these free questions.

Explore Paediatrics ST1 practice

Official source

Check the live recruitment guidance

Interview formats can change between cycles. This focused guide should be used alongside the official source below and the full Paediatrics ST1 guide.

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