Croup Severity Score (Westley)

Paediatric emergency department triage and treatment decision-making for children presenting with barking cough and stridor.. This application is commonly used by professionals who need precise quantitative analysis to support decision-making, budgeting, and strategic planning in their respective fields

Determining admission versus discharge: Westley score guides the clinician on whether dexamethasone alone permits safe discharge or nebulised adrenaline and admission are required.. Industry practitioners rely on this calculation to benchmark performance, compare alternatives, and ensure compliance with established standards and regulatory requirements

Clinical audit: tracking Westley scores at presentation and post-treatment in paediatric emergency audit programmes.. Academic researchers and students use this computation to validate theoretical models, complete coursework assignments, and develop deeper understanding of the underlying mathematical principles

Simulation training for APLS and PALS courses: croup management is a core paediatric emergency scenario using the Westley framework.. Financial analysts and planners incorporate this calculation into their workflow to produce accurate forecasts, evaluate risk scenarios, and present data-driven recommendations to stakeholders

Research: Westley score is the primary outcome measure in clinical trials of croup treatments, including dexamethasone dosing studies and novel anti-inflammatory interventions.. This application is commonly used by professionals who need precise quantitative analysis to support decision-making, budgeting, and strategic planning in their respective fields

What is the difference between croup and epiglottitis?

Croup (laryngotracheobronchitis) causes gradual-onset barking cough, stridor, and low-grade fever in children under 3, typically with a viral prodrome. Epiglottitis causes rapidly progressive high fever, drooling, toxic appearance, and a muffled voice (not barking cough) in older children and is a surgical emergency. Epiglottitis is now rare due to Hib vaccination. Never examine the throat or attempt IV access in a suspected epiglottitis patient without anaesthesia support immediately available.

What is the mechanism of dexamethasone in croup?

Dexamethasone reduces laryngeal and subglottic mucosal oedema through its anti-inflammatory effects. It decreases vascular permeability and suppresses the inflammatory cytokine cascade triggered by viral infection. A single oral dose of 0.15 mg/kg is effective within 6 hours and provides clinical benefit lasting up to 24-48 hours due to dexamethasone's long half-life.

Why is nebulised adrenaline only temporary?

Nebulised adrenaline (epinephrine) acts as an alpha-adrenergic agonist, causing vasoconstriction of the subglottic mucosal vessels, which reduces oedema and stridor within minutes. However, the vasoconstriction wears off in approximately 1.5-2 hours, and the underlying oedema may return (rebound effect). This is why 2-4 hours of post-adrenaline observation is mandatory. This matters because accurate croup westley score calculations directly affect decision-making in professional and personal contexts.

Can croup be treated with budesonide?

Yes. Nebulised budesonide (2 mg) is as effective as oral dexamethasone for moderate croup and is useful when the child is unable to take oral medication due to vomiting. However, oral or IM dexamethasone is preferred when possible due to ease of administration and equivalent efficacy. This is an important consideration when working with croup westley score calculations in practical applications.

Is humidified air or steam helpful for croup?

Despite being a long-standing traditional remedy, humidified air and steam therapy have no proven benefit in randomised controlled trials and may carry risks (scalding, worsening agitation). Current evidence-based guidelines do not recommend steam inhalation for croup; dexamethasone is the only pharmacological treatment with strong evidence. This is an important consideration when working with croup westley score calculations in practical applications.

What ETT size should be used for intubating a child with severe croup?

Due to subglottic narrowing, the ETT should be 0.5-1 mm smaller than calculated for age. An experienced paediatric anaesthetist or intensivist should perform or supervise intubation. Anticipate difficulty passing the tube through the narrowed subglottis; have a variety of tube sizes available. Early tracheostomy may be required if intubation is impossible.

When should a child with croup be admitted to hospital?

Admission is indicated for: Westley score ≥3 that does not improve with treatment; requirement for nebulised adrenaline (observe 4 hours minimum); recurrent presentation within 24 hours; concerns about parental ability to monitor or access emergency care; or clinical concerns about the diagnosis (consider foreign body, epiglottitis, bacterial tracheitis). This applies across multiple contexts where croup westley score values need to be determined with precision.

What should parents be told when discharging a child with mild croup?

Parents should be advised to return immediately if: stridor is present at rest; breathing becomes laboured or fast; the child becomes unusually pale, drowsy, or unable to swallow; cyanosis develops; or if the child's condition fails to improve within 24-48 hours. The barking cough typically worsens at night and may improve slightly in the morning — this pattern is characteristic and reassuring.