Paeds · respiratory-sleep-and-airway
Acute severe and life-threatening asthma
Also known as Acute severe asthma · Life-threatening asthma · Near-fatal asthma · Status asthmaticus · Acute asthma exacerbation
Fellowship guide to acute severe and life-threatening asthma in children: grading severity from the whole child, the pathophysiology of the failing airway, the stepwise escalation from oxygen and continuous salbutamol through ipratropium and systemic steroid to IV magnesium, IV salbutamol or aminophylline and PICU, recognising the silent chest and the exhausted child, avoiding the pitfalls that kill, and the ANZ, UK and North American guideline differences.
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Target exams
Red flags
- A silent chest with poor air entry in a wheezing child — this is reduced air movement through a critically obstructed airway, a pre-arrest sign, not improvement
- Exhaustion, drowsiness or confusion in an acutely breathless child — impending respiratory failure; call for senior, anaesthetic and PICU help now
- A rising or normalising PaCO₂ in a child who is tiring — the ominous sign of a failing respiratory pump, not of recovery
- SpO₂ persistently below 90% despite high-flow oxygen and continuous bronchodilator — severe hypoxaemia that mandates IV therapy and critical-care escalation
- Cyanosis, a feeble respiratory effort, bradycardia or hypotension — peri-arrest; prepare for a controlled intubation and be ready for cardiac arrest
Life stages
Care settings
Clinical exam formats
Board mappings
- General and Community Paediatrics
- Acute respiratory illness
- Recognition and management of the acutely unwell child
- Current 2026 PREP curriculum — Learning goal 5: Clinical assessment – essential general paediatrics
- Renewed curriculum for first-year trainees from 2027 — Learning goal 6: Acute and critical care
- Recognition and escalation of respiratory failure
- Clinical Applications
- Acute paediatrics and respiratory emergencies
- Short Cases
- Acute assessment scenarios
- Communication scenarios
- 4. Professional skills and knowledge: Patient management
- 6. Acute and emergency care
- General Paediatrics: Recognises and manages acute severe asthma and respiratory failure
- Foundation of Practice (FOP)
- Applied Knowledge in Practice (AKP)
- Acute respiratory illness; asthma exacerbation
- Clinical
- History and management planning
- Acute respiratory assessment
- General Pediatrics Content Outline — Domain 2: Emergency Medicine
- General Pediatrics Content Outline — Domain 17: Respiratory System
- General Pediatrics EPA: Assess and manage the acutely ill child
- Patient Care 1: History and Physical Examination
- Patient Care 4: Clinical Reasoning
- Patient Care 5: Emergency and acute care
- Medical Knowledge 1: Clinical Knowledge
- Systems-Based Practice: escalation and critical-care teamwork
- Medical Expert
- Communicator
- Collaborator
- Scholar
- Pediatrics: Core EPA — Assess and manage the acutely ill child with respiratory distress
Overview & Definition
Picture the eight-year-old carried into the resus bay hunched forward, too breathless to answer you, using every accessory muscle, with a chest that is wheezing everywhere and oxygen saturations of 88% on air. His mother says his reliever stopped working an hour ago. That scene — a child in obvious respiratory distress from asthma who is no longer responding to their usual treatment — is acute severe asthma, and the speed and order of what you do next decides whether he improves or arrests. [1] [11]
Acute severe asthma is an exacerbation of asthma severe enough that inhaled bronchodilator alone is failing and the child shows objective signs of serious airflow limitation: inability to talk in sentences, marked work of breathing, tachypnoea and tachycardia, and hypoxaemia. Life-threatening asthma is the next tier — a silent chest, poor respiratory effort, cyanosis, exhaustion, confusion or hypotension — and near-fatal asthma describes the child with a raised PaCO₂ who needs mechanical ventilation. [1] [12]
Why this matters at fellowship level is that asthma is one of the commonest paediatric emergencies, most exacerbations respond well to prompt inhaled therapy and steroid, and the deaths are largely preventable — they cluster in children whose severity was underestimated, whose treatment was delayed, or whose deterioration was misread. The skill being tested is recognising severity early, escalating in the right order, and never mistaking a fading child for a recovering one. [11] [12]
References12ShowHide
- [1]Leung JS. Paediatrics: how to manage acute asthma exacerbations. Drugs Context, 2021.PMID 34113386
- [2]Powell C, Kolamunnage-Dona R, Lowe J, et al. Magnesium sulphate in acute severe asthma in children (MAGNETIC): a randomised, placebo-controlled trial. Lancet Respir Med, 2013.PMID 24429155
- [3]Griffiths B, Kew KM. Intravenous magnesium sulfate for treating children with acute asthma in the emergency department. Cochrane Database Syst Rev, 2016.PMID 27126744
- [4]Knightly R, Milan SJ, Hughes R, et al. Inhaled magnesium sulfate in the treatment of acute asthma. Cochrane Database Syst Rev, 2017.PMID 29182799
- [5]Griffiths B, Ducharme FM. Combined inhaled anticholinergics and short-acting beta2-agonists for initial treatment of acute asthma in children. Cochrane Database Syst Rev, 2013.PMID 23966133
- [6]Vézina K, Chauhan BF, Ducharme FM. Inhaled anticholinergics and short-acting beta2-agonists versus short-acting beta2-agonists alone for children with acute asthma in hospital. Cochrane Database Syst Rev, 2014.PMID 25080126
- [7]Edmonds ML, Milan SJ, Camargo CA Jr, et al. Early use of inhaled corticosteroids in the emergency department treatment of acute asthma. Cochrane Database Syst Rev, 2012.PMID 23235589
- [8]Normansell R, Kew KM, Mansour G. Different oral corticosteroid regimens for acute asthma. Cochrane Database Syst Rev, 2016.PMID 27176676
- [9]Camargo CA Jr, Spooner CH, Rowe BH. Continuous versus intermittent beta-agonists in the treatment of acute asthma. Cochrane Database Syst Rev, 2003.PMID 14583926
- [10]Travers A, Jones AP, Kelly K, et al. Intravenous beta2-agonists for acute asthma in the emergency department. Cochrane Database Syst Rev, 2001.PMID 11406055
- [11]Craig S, Powell CVE, Nixon GM, et al. Treatment patterns and frequency of key outcomes in acute severe asthma in children: a Paediatric Research in Emergency Departments International Collaborative (PREDICT) multicentre cohort study. BMJ Open Respir Res, 2022.PMID 35301198
- [12]Craig SS, Dalziel SR, Powell CV, et al. Interventions for escalation of therapy for acute exacerbations of asthma in children: an overview of Cochrane Reviews. Cochrane Database Syst Rev, 2020.PMID 32767571