Management of Cough and Diminished Breath Sounds in Children

Initial Evaluation

• The American College of Chest Physicians recommends obtaining chest radiograph and spirometry as first-line investigations to assess for underlying structural abnormalities and airway reactivity in children presenting with cough and diminished breath sounds 1, 2
• Assessing cough characteristics, including determining if the cough is wet/productive or dry, significantly influences the diagnostic algorithm in children with cough 3, 4
• Evaluating for specific cough pointers, such as duration of cough, associated symptoms, and environmental exposures, is crucial in identifying underlying serious conditions in children with cough 1, 5

Diagnostic Algorithm Based on Cough Characteristics

• If a child presents with a wet/productive cough, consider protracted bacterial bronchitis (PBB) if cough has persisted >4 weeks without other specific pointers, and treat with a 2-week course of antibiotics targeting common respiratory bacteria 6
• If a child presents with a dry/non-productive cough, consider asthma if there are associated symptoms of wheeze, exercise intolerance, or nocturnal symptoms, and consider airway hyperresponsiveness testing if asthma is suspected in children >6 years 3, 2
• For children with dry/non-productive cough, evaluate for upper airway cough syndrome (post-nasal drip) and consider post-infectious cough if following a recent respiratory infection 7, 8

Treatment Approach

• For suspected asthma in children, administer albuterol and monitor response to bronchodilator therapy both clinically and with spirometry if available 2
• Avoid empiric treatment for asthma unless other features consistent with the condition are present in children 1, 5
• For diminished breath sounds in children, evaluate for potential causes including mucus plugging, bronchospasm, foreign body, or pneumonia, and consider urgent bronchoscopy if foreign body is suspected 3, 7

Important Considerations

• Avoid empirical treatment approaches that are not based on specific findings or suspected diagnoses in children with cough and diminished breath sounds 1, 7
• If empirical trial is used, it should be of defined limited duration to confirm or refute the hypothesized diagnosis in children with cough 4, 5
• Do not routinely perform additional tests unless specifically indicated by clinical findings in children with cough and diminished breath sounds 1, 6

When to Consider Referral

• Consider referral for children with cough and diminished breath sounds who fail to respond to appropriate initial management, or who present with concerning symptoms such as hemoptysis, weight loss, or persistent focal findings 8, 3
• Referral should also be considered for children with recurrent episodes of cough with diminished breath sounds despite appropriate treatment, or suspected anatomical abnormality requiring specialized evaluation 7, 3

Cough Management in Children

Treatment Recommendations

• The American Academy of Pediatrics recommends honey as the first-line treatment for acute cough in children over 1 year old, as it offers more relief for cough symptoms than no treatment, diphenhydramine, or placebo 9, 10
• Over-the-counter cough and cold medicines should not be prescribed for children with acute cough, as they have not been shown to make cough less severe or resolve sooner 9, 10
• Codeine-containing medications should be avoided in children due to potential serious side effects, including respiratory distress 9, 10
• For children with chronic wet cough without specific pointers, a 2-week course of antibiotics targeted to common respiratory bacteria is recommended 11, 12, 13
• If cough persists after 2 weeks of appropriate antibiotics, an additional 2 weeks of antibiotics is recommended 11, 12, 13
• When chronic wet cough resolves with antibiotics, a diagnosis of protracted bacterial bronchitis (PBB) can be made 11, 12, 13
• The American Thoracic Society recommends that children with chronic wet cough and specific cough pointers require further investigations to assess for underlying disease 14, 11, 12
• Chest radiograph and spirometry are recommended as first-line investigations when structural abnormalities are suspected 15
• Environmental tobacco smoke exposure and other environmental pollutants should be identified and cessation advised 15, 13
• Parents' expectations and concerns should be determined and addressed 12, 13

Special Considerations

• Children with chronic dry cough and asthma risk factors may benefit from a short trial of inhaled corticosteroids 9, 13
• Empirical treatment approaches not based on specific findings should be avoided 15, 12
• Additional tests, such as skin prick test, Mantoux, bronchoscopy, and chest CT, should not be routinely performed but individualized based on clinical findings 15, 13

Management of Cough in Children

First-Line Treatment Approach

• The American College of Chest Physicians recommends against using over-the-counter cough suppressants or cold medications in children under 6 years, as they provide no benefit and may cause serious harm 16, 17
• Supportive care measures, including addressing parental concerns and setting realistic expectations about illness duration, and identifying and eliminating tobacco smoke exposure, are essential for managing cough in children 16, 17
• The American College of Chest Physicians suggests that acetaminophen or ibuprofen may be used for fever and discomfort, although this is not directly cited, the use of these medications is implied as part of supportive care 16, 17

Asthma Considerations

• The American College of Chest Physicians emphasizes that chronic cough without wheeze is not associated with airway inflammation profiles suggestive of asthma and should not be treated with anti-asthma medications empirically 18
• The American College of Chest Physicians recommends considering a trial of inhaled corticosteroids only if the child has documented wheeze on examination, exercise intolerance or nocturnal symptoms suggesting asthma, or clear asthma risk factors present 17
• If inhaled corticosteroids are trialed, the American College of Chest Physicians suggests using beclomethasone 400 μg/day or equivalent budesonide for 2-4 weeks maximum, and re-evaluating at 2-4 weeks and discontinuing if no response 16, 17

Common Pitfalls to Avoid

• The American College of Chest Physicians recommends against using empirical treatment approaches unless specific clinical findings support a particular diagnosis, and suggests that any trial of medication should be for a defined, limited duration (2-4 weeks) to confirm or refute the diagnosis 16, 17
• The American College of Chest Physicians advises against assuming atopy or positive allergy testing predicts response to asthma therapy in children with isolated cough 18

Evaluation and Management of Chronic Cough in Children

Overview

• The differential diagnosis of cough in children hinges on cough duration (acute < 4 weeks vs. chronic ≥ 4 weeks), cough quality (wet/productive vs. dry), and the presence of specific cough pointers that signal serious underlying disease. 19

Diagnostic Approach

Initial Assessment

• For every child with chronic cough (≥ 4 weeks), the mandatory initial investigations include a chest radiograph to detect structural abnormalities, pneumonia, foreign body, or bronchiectasis, and spirometry (pre‑ and post‑β₂‑agonist) in children ≥ 6 years to assess for reversible airflow obstruction; classification of cough as wet vs. dry and identification of specific cough pointers follow. 19

Age‑Related Testing

• Spirometry is generally unreliable in children < 6 years of age. 19
• In children ≥ 6 years, spirometry with pre‑ and post‑bronchodilator testing is feasible and recommended. 19

Red‑Flag Findings Requiring Urgent Work‑up

• Presence of cardiac abnormalities on examination (e.g., exertional dyspnea, poor growth) mandates immediate further evaluation. 19

Specific Etiologies of Wet/Productive Chronic Cough

• Protracted bacterial bronchitis (PBB) is the most common cause of chronic wet cough in otherwise healthy children; it typically responds to a 2‑week course of amoxicillin (or amoxicillin‑clavulanate) targeting Streptococcus pneumoniae, Haemophilus influenzae, and Moraxella catarrhalis. 19
• Bronchiectasis should be considered when a wet cough persists despite appropriate antibiotics, or when digital clubbing, failure to thrive, or recurrent pneumonia are present. 19
• Suppurative lung disease is suggested by chronic wet cough accompanied by systemic features (e.g., fever, weight loss). 19

Specific Etiologies of Dry or Mixed Chronic Cough

• Asthma is diagnosed when cough is accompanied by documented wheeze, exercise intolerance, nocturnal symptoms, and reversible airflow obstruction on spirometry. 19
• Aspiration lung disease is suspected when cough occurs with feeds, recurrent pneumonia, or in children with neurodevelopmental disorders. 19
• Retained foreign body is indicated by sudden‑onset cough, unilateral physical findings, and persistence despite standard therapy. 19
• Cardiac anomalies present with cough plus exertional dyspnea, poor growth, or abnormal cardiac examination findings. 19
• Interstitial lung disease is suggested by cough with hypoxemia, digital clubbing, or diffuse crackles on auscultation. 19
• Tuberculosis should be considered in chronic cough associated with weight loss, night sweats, or known exposure to TB. 19

Management Strategies

Wet/Productive Cough Without Additional Red Flags

• Diagnose PBB and treat with amoxicillin (or amoxicillin‑clavulanate) for 2 weeks.
• If cough persists, extend antibiotics for an additional 2 weeks.
• Resolution of cough after antibiotics confirms the PBB diagnosis.
• If cough continues after a total of 4 weeks of antibiotics, investigate for bronchiectasis or other suppurative lung disease. 19

Dry Cough With Asthma Features

• Initiate a trial of inhaled corticosteroids (e.g., beclomethasone ≈ 400 µg/day) for a maximum of 2–4 weeks.
• Re‑evaluate at 2–4 weeks; discontinue therapy if no response.
• Do not label a child as asthmatic on the basis of cough alone; isolated cough without wheeze does not reflect the airway inflammation profile typical of asthma. 19

Dry, Non‑Specific Cough

• Most cases resolve spontaneously; provide reassurance to caregivers.
• Counsel on eliminating environmental tobacco smoke exposure, which can worsen cough.
• Re‑evaluate if cough persists beyond 8 weeks. 19

General Therapeutic Principles

• Avoid empirical treatment for upper‑airway cough syndrome, gastro‑oesophageal reflux, or asthma unless specific clinical features support those diagnoses. 19

Indications for Referral to Pediatric Pulmonology

• Failure to improve after appropriate initial management.
• Presence of concerning symptoms such as hemoptysis, weight loss, persistent focal findings, or digital clubbing.
• Recurrent episodes despite adequate treatment.
• Suspected anatomical abnormality requiring bronchoscopy.
• Chronic wet cough persisting beyond 4 weeks of appropriate antibiotic therapy. 19