HomePLAB 1Paediatrics

Master Paediatrics
for PLAB 1

Access 50+ high-yield questions tailored for the 2026 syllabus. Includes AI-powered explanations and performance tracking.

Start Free Practice View Full Syllabus
HIGH YIELD NOTES ~5 min read

Core Concepts

Paediatrics focuses on the health and medical care of infants, children, and adolescents. Key areas include understanding normal growth and development (milestones, growth charts), the importance of routine immunisation schedules, and recognising the spectrum of common childhood illnesses. A crucial aspect is child safeguarding, identifying and acting upon concerns of non-accidental injury (NAI) or neglect. Neonatology covers the unique challenges of newborns, including prematurity, neonatal jaundice, and sepsis. Paediatric emergencies like sepsis, asthma exacerbations, anaphylaxis, and apparent life-threatening events (ALTEs)/brief resolved unexplained events (BRUEs) require prompt recognition and management.

Clinical Presentation

  • History Taking: Always include presenting complaint (PC), history of presenting complaint (HPC) covering ICE (Ideas, Concerns, Expectations), relevant past medical history (PMH), drug history (DH), allergies (AH), family history (FH), and social history (SH). Specifically for paediatrics, inquire about birth history, developmental milestones, feeding, immunisation status, and safeguarding concerns.
  • Symptoms:
    • Fever: Common, assess for associated symptoms (rash, vomiting, lethargy, work of breathing).
    • Respiratory: Cough, wheeze, stridor, shortness of breath, grunting (e.g., bronchiolitis, asthma, croup, pneumonia).
    • Gastrointestinal: Vomiting, diarrhoea, abdominal pain, poor feeding (e.g., gastroenteritis, appendicitis, intussusception).
    • Rashes: Characterise type, distribution, blanching status (e.g., viral exanthems, meningococcal rash, purpura, eczema).
    • Developmental Delay: Concerns regarding motor, speech, social, or cognitive milestones.
    • Irritability/Lethargy: Non-specific but concerning, especially in infants.
  • Examination: Begin with general observation (alertness, colour, hydration, respiratory effort). Systemic examination focusing on vital signs (HR, RR, T, BP, SpO2), growth parameters (weight, height, head circumference plotted on centile charts), and relevant system examination (e.g., chest auscultation, abdominal palpation, neurological assessment including fontanelles).

Diagnosis (Gold Standard)

Diagnosis in paediatrics often relies heavily on clinical assessment supported by targeted investigations. For many common conditions (e.g., bronchiolitis, viral exanthems, gastroenteritis), the diagnosis is purely clinical. For suspected infections like sepsis, the gold standard involves blood cultures, alongside FBC, CRP, lactate, and urine MC&S; CSF analysis for meningitis. UTI is diagnosed by urine dipstick and MC&S. Developmental delay often requires formal assessment by a paediatrician and may involve genetic testing or neuroimaging. Child abuse investigations necessitate a thorough history, physical examination, skeletal survey (X-rays), and ophthalmological assessment.

Management (First Line)

First-line management in paediatrics prioritises supportive care and addressing emergencies. The ABCDE approach is crucial for acutely unwell children. Hydration (oral rehydration solution for mild-moderate dehydration, IV fluids for severe), antipyretics (paracetamol/ibuprofen), and pain relief are fundamental. Specific treatments include: salbutamol and oral steroids for asthma exacerbations; adrenaline for anaphylaxis; broad-spectrum IV antibiotics and fluid resuscitation for suspected sepsis; nebulised adrenaline and dexamethasone for croup; supportive care with oxygen and nasogastric feeds for bronchiolitis; phototherapy for significant neonatal jaundice; and age-appropriate antibiotics for UTI. Always ensure immunisation status is up-to-date. For safeguarding concerns, immediate documentation and referral to social services are paramount.

Exam Red Flags

  • Non-blanching rash (petechiae/purpura): Urgent assessment for meningococcal sepsis.
  • Lethargy, poor feeding, irritability, floppy tone in an infant: High suspicion for sepsis.
  • Severe work of breathing (grunting, subcostal/intercostal recession, nasal flaring, tachypnoea): Respiratory distress, potentially severe infection or asthma exacerbation.
  • Bulging fontanelle: Raised intracranial pressure (e.g., meningitis, hydrocephalus).
  • Significant dehydration signs: Sunken eyes, reduced skin turgor, prolonged capillary refill time, decreased urine output – requires urgent fluid resuscitation.
  • Inconsistent history, unexplained injuries, multiple injuries of varying ages, or parental delay in seeking care: Suspect Non-Accidental Injury (NAI) or child abuse.
  • Fever for >5 days with rash, conjunctivitis, red lips/tongue, swollen hands/feet, cervical lymphadenopathy: Kawasaki disease (risk of coronary artery aneurysms).
  • ALTE/BRUE (Apparent Life-Threatening Event / Brief Resolved Unexplained Event): Always requires thorough investigation to rule out serious underlying causes.
  • Stridor in a febrile child: Consider epiglottitis (rare due to HiB vaccine) or severe croup.

Sample Practice Questions

Question 1

A 2-year-old child is brought to the emergency department with a 12-hour history of fever, irritability, and poor feeding. The parents report he has become increasingly drowsy and has developed a non-blanching purpuric rash on his trunk and limbs. On examination, he is febrile (39.5°C), hypotensive (BP 70/40 mmHg), tachycardic (HR 180 bpm), and has a stiff neck. His capillary refill time is prolonged at 4 seconds.

A) Perform a lumbar puncture immediately.
B) Administer intravenous broad-spectrum antibiotics.
C) Order a CT scan of the head.
D) Administer antipyretics and observe for an hour.
Explanation: This area is hidden for preview users.
Question 2

An 18-month-old girl presents to the emergency department after experiencing a sudden generalised tonic-clonic seizure at home, which lasted approximately 3 minutes. Her parents report she has been unwell for the past 24 hours with a fever, reaching 39.5°C before the seizure. She has no personal or family history of epilepsy. Following the seizure, she was drowsy but is now alert and interacting. On examination, she is febrile (38.8°C) but neurologically normal.

A) Start prophylactic anti-epileptic medication for at least 6 months.
B) Perform an urgent lumbar puncture to rule out meningitis.
C) Reassure parents about the generally benign nature of the event, providing fever management advice.
D) Refer for an immediate EEG and MRI of the brain.
Explanation: This area is hidden for preview users.
Question 3

A 3-year-old girl is brought to the emergency department by her parents with a 2-day history of fever, irritability, and headache. She is now drowsy and photophobic. On examination, she has neck stiffness and a non-blanching petechial rash on her trunk and limbs. What is the most urgent initial management step?

A) Administer empirical intravenous antibiotics
B) Perform a lumbar puncture
C) Arrange an urgent CT head scan
D) Admit to an isolation ward and observe
Explanation: This area is hidden for preview users.

Ready to see the answers?

Unlock All Answers

PLAB 1

  • ✓ 50+ Paediatrics Questions
  • ✓ AI Tutor Assistance
  • ✓ Detailed Explanations
  • ✓ Performance Analytics
Get Full Access