Paediatrics: Croup: Free MSRA Podcast

🩺 FREE MSRA PODCAST – CroupYour rapid, focused audio revision guide to croup—covering the essentials for the MSRA, paediatrics exams, and everyday clinical practice.🧠 Key Learning Points📌 Definition• Croup (laryngotracheobronchitis) is a viral upper airway infection causing inflammation and narrowing from the larynx to the bronchi—hence the classic barking cough, hoarseness, and inspiratory stridor in young children.📌 Causes• Most cases (≈75%) due to parainfluenza virus (especially HPIV-1).• Others: RSV, influenza A/B, adenovirus, rhinovirus, enterovirus.• Bacterial causes (rare): Mycoplasma, diphtheria.📌 Epidemiology & Risk Factors• Peak age: 6 months to 3 years (can affect up to 6 years).• Annual prevalence: ~3% of young children.• Seasonality: Peaks in autumn (September–December).• Slightly more common in boys (1.4:1).• Risk factors: exposure to infected children (daycare), lack of prior immunity.📌 Pathophysiology• Virus targets the subglottic region (just below the vocal cords), causing oedema/narrowing of the already small paediatric airway.• Inspiratory stridor results from turbulent airflow through the narrowed subglottic space.📌 Symptoms & Clinical Features• Classic triad:– Barking “seal-like” cough– Hoarse voice– Inspiratory stridor (especially when upset/at rest in moderate-severe cases)• Fever, respiratory distress, chest wall retraction.• Worse at night (“midnight croup”).• Most children are otherwise well between episodes.📌 Severity Grading• Mild: Barking cough/hoarse voice, no stridor at rest.• Moderate: Barking cough, stridor at rest, chest wall recession, but not agitated or lethargic.• Severe: Barking cough, stridor at rest, marked recession, plus agitation/lethargy.• Impending respiratory failure: Fatigue, cyanosis, reduced consciousness, tachycardia.📌 Diagnosis• Clinical (history, symptoms, and exam).• Pulse oximetry if severe.• Steeple sign on AP neck x-ray: subglottic narrowing.• (Thumb sign = epiglottitis, a key differential).📌 Differential Diagnosis• Epiglottitis (muffled voice, drooling, toxic appearance)• Bacterial tracheitis• Foreign body aspiration• Retropharyngeal abscess• Allergic reactions/angioedema• Laryngomalacia (infants), peritonsillar abscess, vocal cord paralysis📌 Management• All children: Single dose oral dexamethasone (0.15 mg/kg)—per NICE CKS.• Mild: Home management, safety-net advice, paracetamol/ibuprofen as needed, fluids, observe.• Moderate/severe: Hospital admission.– Dexamethasone– Nebulised adrenaline (5 mL of 1:1,000) if moderate/severe– Oxygen if hypoxic– Monitor for deterioration; consider intubation in respiratory failure.• Avoid steam inhalation (anecdotal, not evidence-based).• Most improve rapidly with steroids; only ~10% need hospitalisation.📌 Prognosis & Complications• Excellent prognosis—most recover within days.• Severe obstruction/respiratory failure: rare (intubation rate ~1–3%).• Death extremely rare (~1 in 30,000).• Other risks: secondary bacterial infection (tracheitis, pneumonia), dehydration.📎 MSRA Revision Resources for Croup:📝 Revision Notes: https://www.passthemsra.com/topic/croup-revision-notes/🧠 Flashcards: https://www.passthemsra.com/topic/croup-flashcards/💬 Accordion Q&A Notes: https://www.passthemsra.com/topic/croup-accordion-qa-notes/🚀 Rapid Quiz: https://www.passthemsra.com/topic/croup-rapid-quiz/🎓 Full Paediatrics Course: https://www.passthemsra.com/courses/paediatrics-for-the-msra/#MSRA #MSRARevision #Paediatrics #Croup #BarkingCough #Steroids #Dexamethasone #MSRAFlashcards #MSRAQuiz #PassTheMSRA