A frightened toddler with a seal-like barking cough and audible stridor is one of the most anxiety-provoking presentations a nurse will encounter on a pediatric unit. Croup, or laryngotracheobronchitis, is a common viral illness of early childhood, and the nursing care of pediatric croup demands sharp assessment skills, calm bedside presence, and confident use of the nursing process. For NCLEX candidates and practicing registered nurses alike, understanding how to recognize, score, and treat croup — and how to teach families to manage it at home — is essential clinical knowledge tested repeatedly on licensure exams and applied daily in emergency departments, pediatric units, and urgent care clinics.
This guide walks through the pathophysiology, assessment, interventions, and patient education involved in the nursing care of pediatric croup, built for use alongside a broader pediatric nursing bundle of respiratory content.
Table of Contents
- What Is Croup?
- Causes and Risk Factors
- Pathophysiology of Croup
- Signs and Symptoms
- The Westley Croup Score
- Diagnosis and Diagnostic Imaging
- Medical and Pharmacologic Treatment
- Nursing Assessment
- Nursing Interventions
- Patient and Family Education
- Complications
- Prevention and Prognosis
- NCLEX Tips
- Clinical Pearls
- FAQs
- References
What Is Croup?
Croup is an acute viral infection causing inflammation and swelling of the upper airway — specifically the larynx, trachea, and sometimes the bronchi. It typically affects children between 6 months and 6 years old, with peak incidence around 2 years of age, and is most common in late fall through early winter. Croup is classically described by its hallmark triad: a barking cough, inspiratory stridor, and hoarseness, often accompanied by low-grade fever and preceded by a few days of upper respiratory symptoms.
The condition exists on a clinical spectrum, ranging from mild laryngotracheitis to the rarer, more severe laryngotracheobronchopneumonitis. Fortunately, most cases are self-limited and resolve with minimal intervention, making early recognition and appropriate outpatient teaching a central nursing responsibility.
Causes and Risk Factors
Croup is overwhelmingly viral in origin. Common causative organisms include:
- Parainfluenza virus (types 1–3) — the most frequent cause
- Respiratory syncytial virus (RSV)
- Influenza A and B
- Adenovirus
- Human metapneumovirus
- Occasionally, Mycoplasma pneumoniae
Risk factors that increase susceptibility or severity include:
- Age under 6 years (airway diameter is proportionally smaller)
- Male sex (croup affects boys slightly more often than girls)
- Family or personal history of recurrent croup
- Seasonal exposure (autumn and winter months)
- Daycare or group childcare attendance
Pathophysiology of Croup
Viral infection triggers inflammation of the subglottic region — the narrowest part of a young child’s airway. Because a child’s airway is already small in diameter, even minor mucosal swelling produces a disproportionately large increase in airway resistance, per Poiseuille’s law. The inflammatory process causes:
- Edema of the tracheal mucosa and submucosa
- Increased mucus production
- Narrowing of the subglottic airway, producing the characteristic inspiratory stridor
- Vocal cord irritation, producing the hoarse, barking cough
This is why the same viral infection that causes only a mild cold in an older child or adult can cause significant airway narrowing and respiratory distress in an infant or toddler.
Signs and Symptoms
Croup typically begins with 1–3 days of nonspecific upper respiratory symptoms (rhinorrhea, low-grade fever, mild cough) before progressing to classic findings:
- Barking, seal-like cough — often worse at night
- Inspiratory stridor, initially only with agitation or crying, potentially progressing to stridor at rest
- Hoarse voice or cry
- Low-grade to moderate fever
- Symptoms characteristically worsen at night and may improve during the day
As severity increases, the nurse should watch for signs of impending respiratory failure: nasal flaring, suprasternal and intercostal retractions, tachypnea, restlessness progressing to lethargy, and cyanosis — all red flags requiring immediate escalation.
The Westley Croup Score
The Westley Croup Score is the most widely used clinical tool for classifying croup severity and guiding nursing assessment and treatment decisions. It evaluates five parameters:
| Parameter | Findings | Points |
|---|---|---|
| Level of consciousness | Normal, including sleep | 0 |
| Disoriented | 5 | |
| Cyanosis | None | 0 |
| With agitation | 4 | |
| At rest | 5 | |
| Stridor | None | 0 |
| With agitation | 1 | |
| At rest | 2 | |
| Air entry | Normal | 0 |
| Decreased | 1 | |
| Markedly decreased | 2 | |
| Retractions | None | 0 |
| Mild | 1 | |
| Moderate | 2 | |
| Severe | 3 |
Scoring interpretation:
- Mild (≤2): Occasional barking cough, no stridor at rest, no or mild retractions
- Moderate (3–7): Frequent barking cough, stridor at rest, some retractions, minimal distress
- Severe (≥8): Stridor at rest, marked retractions, significant distress, possible altered mental status
The score guides both medical and nursing decisions, though many bedside clinicians pair it with qualitative “clinical gestalt” — assessing whether the child looks well, mildly distressed, or acutely ill — since formal scoring can be impractical in fast-paced settings.
Diagnosis and Diagnostic Imaging
Croup is primarily a clinical diagnosis based on history and physical exam; laboratory testing and imaging are not routinely required.
- Physical exam: Auscultation for stridor, assessment of work of breathing, observation of the child’s positioning and behavior
- Neck/chest x-ray (if performed): May show the classic “steeple sign” — subglottic narrowing on an anteroposterior neck film — though imaging is reserved for atypical presentations or to rule out other diagnoses
- Pulse oximetry: Continuous monitoring in moderate-to-severe cases
- Avoid direct visualization of the throat with a tongue depressor if epiglottitis is suspected, as this can precipitate complete airway obstruction
Croup must be differentiated from more dangerous mimics, particularly epiglottitis (high fever, drooling, tripod positioning, absence of cough), bacterial tracheitis, and foreign body aspiration.
Medical and Pharmacologic Treatment
Treatment intensity is guided by severity classification.
Mild croup:
- A single dose of oral dexamethasone (typically 0.6 mg/kg, up to 16 mg maximum) is recommended regardless of severity, as it reduces symptom duration and return visits
- Supportive care and reassurance
- Discharge home with red-flag teaching
Moderate-to-severe croup:
- Dexamethasone plus nebulized racemic epinephrine
- Supplemental oxygen if saturation is low
- Continuous cardiorespiratory monitoring
- Observation period after epinephrine (commonly 2–4 hours) to watch for rebound stridor as the medication wears off
- Escalation to hospital admission if stridor persists at rest, repeat epinephrine doses are needed, or the child fails to improve
Dexamethasone works because it reduces subglottic inflammation and edema; nebulized epinephrine works rapidly through vasoconstriction and mucosal decongestion, but its effect is temporary — usually lasting under two hours — which is why observation before discharge is essential. Cool mist or humidified air, once a mainstay, has limited evidence of benefit but may still offer symptomatic comfort.
Nursing Assessment
A focused, calm nursing assessment is the foundation of safe croup management. Priorities include:
- Respiratory assessment: Rate, effort, presence and timing of stridor (at rest vs. with agitation), retractions, nasal flaring, and auscultation for air entry
- Level of consciousness: Restlessness or lethargy can signal hypoxia and impending respiratory failure
- Skin color: Assess for pallor or cyanosis
- Vital signs: Continuous pulse oximetry; note that agitation can falsely worsen apparent stridor and distress
- History-taking: Onset, duration, exposure to sick contacts, immunization status, prior episodes of croup, and any history of airway anomalies
- Hydration status: Oral intake, urine output, mucous membrane moisture, especially in a febrile or tachypneic child
💡 NCLEX Tips for Pediatric Croup
- Never examine the throat with a tongue depressor if epiglottitis is suspected — this can trigger complete airway obstruction.
- The Westley Croup Score is a high-yield NCLEX concept; know the five parameters and severity cutoffs.
- Keep the child calm — crying increases airway turbulence and worsens stridor.
- Nebulized epinephrine requires monitoring for rebound phenomenon; never discharge immediately after a dose.
- Dexamethasone is given even in mild cases — it is not reserved only for severe croup.
Nursing Interventions
Effective nursing interventions blend physiologic support with psychological reassurance, since a calm child breathes more easily than an anxious, crying one.
- Keep the child calm and comfortable. Encourage the caregiver to hold the child upright on their lap; avoid unnecessary painful procedures that provoke crying.
- Administer medications as ordered. Give oral dexamethasone or nebulized racemic epinephrine per protocol, and document response.
- Monitor continuously during and after epinephrine administration. Watch for rebound stridor as effects wear off, typically observing for at least 2–3 hours before discharge.
- Provide supplemental oxygen via a method the child tolerates (blow-by is often better tolerated than a mask, which can increase agitation).
- Elevate the head of the bed or position the child upright to ease work of breathing.
- Minimize stimulation. Cluster nursing care, dim lighting, and limit unnecessary handling.
- Reassess frequently using the Westley score or clinical gestalt, especially after interventions.
- Prepare for airway emergencies. Keep emergency airway equipment accessible for children with severe or worsening distress.
- Support hydration with small, frequent oral fluids as tolerated; avoid forcing intake if respiratory effort is high.
- Document thoroughly, including respiratory findings, interventions given, and the family’s understanding of home care instructions.
Patient and Family Education
Because most children with croup are discharged home, caregiver education is one of the nurse’s most valuable interventions. Teach families to:
- Recognize that the barking cough often worsens at night and may sound alarming without indicating danger
- Keep the child calm during a coughing or stridor episode — panic worsens airway turbulence
- Consider brief exposure to cool night air or a cool-mist humidifier for symptomatic comfort, understanding evidence for benefit is limited
- Give antipyretics (acetaminophen or ibuprofen, per weight-based dosing) for fever or discomfort
- Encourage adequate oral fluids to prevent dehydration
- Return immediately to the emergency department for stridor at rest that doesn’t improve, retractions, cyanosis, drooling, inability to swallow, or lethargy
- Complete the full recovery period — most symptoms resolve within 3 to 7 days, though the cough may linger longer
- Understand that recurrent croup episodes warrant evaluation by a specialist for possible underlying airway anomalies
Complications
Though most croup is self-limited, the nurse should recognize potential complications:
- Progressive airway obstruction leading to respiratory failure (rare but life-threatening)
- Bacterial tracheitis — a secondary bacterial infection that can mimic worsening croup but presents with high fever and toxic appearance
- Pneumonia
- Pulmonary edema (rare, associated with severe upper airway obstruction)
- Dehydration from poor oral intake during illness
- Otitis media as a secondary complication of the underlying viral infection
Prevention and Prognosis
There is no vaccine specific to croup, but general respiratory hygiene reduces transmission risk:
- Frequent handwashing
- Avoiding close contact with symptomatic individuals
- Routine childhood immunizations (reducing risk from vaccine-preventable causes such as influenza)
Prognosis is excellent. The vast majority of children recover fully within a week with supportive care and, when indicated, dexamethasone and epinephrine. Recurrent croup beyond typical childhood years or unusually severe episodes may warrant ENT referral to evaluate for structural airway abnormalities.
Clinical Pearls
- A child who is quiet, not crying, and comfortable on a parent’s lap may have milder disease than one who appears agitated — but don’t let apparent calm mask deteriorating mental status.
- Stridor at rest is a key severity marker distinguishing moderate/severe croup from mild croup.
- Dexamethasone’s onset takes several hours, so nebulized epinephrine bridges the gap in moderate-to-severe cases while steroids take effect.
- Rebound stridor after epinephrine is the single most important reason not to discharge a child too early.
- Fever alone does not correlate with croup severity — work of breathing and stridor pattern do.
Key Takeaways
- Croup is a viral upper airway illness causing barking cough, stridor, and hoarseness, most common in children 6 months to 6 years.
- The Westley Croup Score standardizes severity assessment across mild, moderate, and severe categories.
- All children with croup, regardless of severity, benefit from a single dose of dexamethasone.
- Moderate-to-severe croup requires nebulized racemic epinephrine plus a mandatory observation period for rebound stridor.
- Nursing priorities center on airway assessment, keeping the child calm, safe medication administration, and thorough caregiver education before discharge.
FAQs
What is the fastest way to treat croup? Nebulized racemic epinephrine provides the fastest symptom relief for moderate-to-severe croup, working within minutes via airway vasoconstriction, though its effects are temporary and require monitored observation afterward.
What are the stages of croup severity? Croup severity is generally categorized as mild, moderate, and severe based on tools like the Westley Croup Score, factoring in stridor, retractions, air entry, cyanosis, and level of consciousness.
When should a child with croup go to the hospital? Caregivers should seek emergency care for stridor at rest that doesn’t improve, significant retractions, bluish skin color, drooling or difficulty swallowing, or lethargy and difficulty waking.
What is the nursing management for croup? Nursing management includes continuous respiratory assessment, keeping the child calm, administering dexamethasone and, if indicated, nebulized epinephrine, monitoring for rebound stridor, and educating families on home care and warning signs.
How long does the barking cough of croup usually last? Most croup symptoms resolve within 3 to 7 days, though a residual cough can persist for one to two weeks in some children.
For more pediatric respiratory content and to test your knowledge with practice questions, explore the NCLEX practice question bank or dive deeper into structured learning with the nursing courses library on RN-Nurse.com.
References
- American Academy of Pediatrics, Hospital Pediatrics — Variation in Organizational Clinical Practice Guidelines for Croup
- StatPearls (NCBI Bookshelf) — Croup
- New England Journal of Medicine — A Randomized Trial of a Single Dose of Oral Dexamethasone for Mild Croup
- Northern California Pediatric Hospital Medicine Consortium — Consensus Guidelines for Management of Croup
- Cochrane Database of Systematic Reviews — Glucocorticoids for croup