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Respiratory System Complications in Pediatrics

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Why Children Are Uniquely Vulnerable

• Smaller airway diameter → minor edema causes significant obstruction
• Horizontal ribs & compliant chest wall → less efficient breathing mechanics, prone to fatigue
• Immature immune system → higher susceptibility to infections
• Higher respiratory rate → faster decompensation when compromised
• Higher oxygen consumption per kg → desaturate faster than adults

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Major Respiratory Complications in Pediatrics

1. 🫁 Pneumonia

• Parapneumonic effusion/Empyema: exudative fluid in pleural space; may require chest drain
• Necrotizing pneumonia: cavitation and lung tissue destruction; increasingly common with S. aureus (MRSA)
• Lung abscess: collection of pus within parenchyma
• Pneumothorax: especially in ventilated patients or those with Staph infection
• Septicemia & septic shock: systemic spread

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2. 🌬️ Bronchiolitis

• Most common lower respiratory tract infection in infants <2 years
• Predominantly caused by RSV (Respiratory Syncytial Virus)

• Apnea — especially in premature infants and neonates (<6 weeks)
• Respiratory failure requiring mechanical ventilation
• Secondary bacterial infection (otitis media, pneumonia)
• Recurrent wheeze / asthma development later in childhood
• Pulmonary hypertension in severe/prolonged cases

Oxygenation target for acute lower respiratory tract infection (bronchiolitis): SpO₂ ≥ 90–92% (Management of Pediatric Patients With Oxygen in the Acute Care Setting, p. 8)

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3. 🤧 Asthma

• Most common chronic respiratory disease in children

• Status asthmaticus — severe, prolonged bronchospasm unresponsive to initial therapy; life-threatening
• Air trapping & hyperinflation → pneumothorax, pneumomediastinum
• Respiratory arrest if untreated
• Steroid-related complications with long-term therapy (growth suppression, adrenal suppression)
• Exercise limitation & school absenteeism — long-term quality-of-life impact
• Fixed airflow obstruction if poorly controlled over years

Oxygen target in asthma: >90% (NHLBI 2007) or 94–98% (British Guideline 2019) (Management of Pediatric Patients With Oxygen, p. 8)

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4. 😴 Obstructive Sleep Apnea (OSA)

• Common in children with adenotonsillar hypertrophy

• Nocturnal hypoxemia (desaturations)
• Pulmonary hypertension → cor pulmonale if chronic
• Neurocognitive deficits: poor attention, behavioral issues, learning difficulties
• Growth failure (disrupted growth hormone secretion)
• Post-adenotonsillectomy respiratory complications: 21.6% of children with mild-to-moderate OSA required supplemental oxygen post-op; risk significantly higher in those with AHI >5 and severe OSA

Children with comorbidities had a 15.7% complication rate vs 6.7% in non-comorbid children after adenotonsillectomy (Day Case Paediatric Adenotonsillectomy, p. 12)

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5. 💨 Croup (Laryngotracheobronchitis)

• Caused by parainfluenza virus; peaks in 6 months–3 years

• Severe upper airway obstruction → stridor at rest, cyanosis
• Bacterial tracheitis (secondary superinfection with S. aureus) — life-threatening
• Respiratory failure in severe cases

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6. 🧫 Pertussis (Whooping Cough)

• Caused by Bordetella pertussis; most dangerous in infants

• Apnea and sudden death in infants <6 months
• Pneumonia (most common cause of death)
• Pulmonary hypertension — severe and often fatal in neonates
• Seizures (from hypoxia or direct toxin effect)
• Subconjunctival hemorrhage, rib fractures (from coughing)
• Encephalopathy

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7. 🌊 Cystic Fibrosis (CF)

• Autosomal recessive; CFTR gene mutation

• Recurrent pulmonary infections (Pseudomonas aeruginosa, S. aureus, Burkholderia cepacia)
• Bronchiectasis — permanent airway dilation and destruction
• Hemoptysis — mild to massive
• Pneumothorax
• Cor pulmonale — from chronic hypoxia and pulmonary hypertension
• Respiratory failure — leading cause of death in CF
• Allergic bronchopulmonary aspergillosis (ABPA)
• Nasal polyps & chronic sinusitis

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8. 🫧 Respiratory Distress Syndrome (RDS) / Neonatal

• Primarily in premature neonates (<34 weeks); surfactant deficiency

• Intraventricular hemorrhage (IVH)
• Pulmonary interstitial emphysema (PIE)
• Pneumothorax, pneumomediastinum
• Bronchopulmonary dysplasia (BPD) — chronic lung disease of prematurity
• Pulmonary hypertension
• Retinopathy of prematurity (from oxygen therapy)

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9. 🦠 Bronchopulmonary Dysplasia (BPD)

• Chronic lung disease following prematurity/mechanical ventilation

• Recurrent respiratory infections
• Reactive airway disease / asthma-like symptoms
• Pulmonary hypertension
• Neurodevelopmental delay
• Growth failure

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10. ⚡ Acute Respiratory Distress Syndrome (ARDS) in Children

• Can follow sepsis, pneumonia, trauma, near-drowning

• Multi-organ dysfunction syndrome (MODS)
• Ventilator-induced lung injury (VILI)
• Pulmonary fibrosis (long-term)
• Neurocognitive impairment post-recovery
• High mortality if severe

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Summary Table of Key Complications by Condition

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High-Risk Groups for Worse Complications

• Infants <2 years and premature neonates
• Children with congenital heart disease
• Immunocompromised patients (oncology, HIV, transplant)
• Children with neuromuscular disease (poor cough)
• Those with comorbid conditions (complication rate: 15.7% vs 6.7% in healthy children)

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• Day Case Paediatric Adenotonsillectomy, p. 12
• Management of Pediatric Patients With Oxygen in the Acute Care Setting, p. 8
• Clinical knowledge (Harrison's Principles, Nelson Textbook of Pediatrics)

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Physiotherapy Treatment for Pediatric Respiratory Complications

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Core Principles of Pediatric Respiratory Physiotherapy

• Treatment must be age-appropriate — techniques differ for neonates, infants, toddlers, and older children
• Positioning is a cornerstone of all pediatric respiratory PT
• Airway clearance is the primary goal in most conditions
• Treatment must be timed appropriately — not during acute distress, not immediately after feeds
• Play-based techniques are used for toddlers and preschoolers
• Family/caregiver education is essential for home management

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Airway Clearance Techniques (ACT) — Foundation of Pediatric Respiratory PT

1. Chest Percussion (Clapping)

• Rhythmic manual tapping on chest wall using cupped hands or two fingers (in neonates)
• Loosens mucus from bronchial walls
• Applied over affected lung segments in postural drainage positions

2. Chest Vibration

• Gentle rapid vibrations applied to chest wall during exhalation
• Mobilizes secretions toward larger airways for clearance
• Used in conjunction with percussion

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Physiotherapy by Condition

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🫁 1. PNEUMONIA

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🌬️ 2. BRONCHIOLITIS (RSV)

Note: Routine chest PT (percussion/postural drainage) is NOT recommended in mild bronchiolitis per current evidence. It does not reduce severity or hospital stay.

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🤧 3. ASTHMA

1. Breathing control (relaxed tidal breathing)
2. Thoracic expansion exercises (deep breaths ± percussion)
3. Forced Expiration Technique (FET/Huffing) — forced exhalation with open glottis to mobilize mucus

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😴 4. OBSTRUCTIVE SLEEP APNEA (OSA)

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💨 5. CROUP

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🧫 6. PERTUSSIS (Whooping Cough)

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🌊 7. CYSTIC FIBROSIS (CF)

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🫧 8. NEONATAL RDS / BRONCHOPULMONARY DYSPLASIA (BPD)

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⚡ 9. ARDS (Pediatric)

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Summary: Physiotherapy Techniques Quick Reference

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General Physiotherapy Precautions in Pediatrics

• ❌ Avoid head-down tilt in infants <6 months (reflux/aspiration risk)
• ❌ Avoid percussion over bare skin, spine, kidneys, or surgical sites
• ❌ Do not perform PT immediately post-feeds (30–45 min wait)
• ❌ Avoid during acute severe bronchospasm without bronchodilator pre-treatment
• ✅ Always monitor SpO₂ before, during, and after PT sessions
• ✅ Stop if child shows signs of distress, significant desaturation, or tachycardia

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• Management of Pediatric Patients With Oxygen in the Acute Care Setting, p. 8
• Day Case Paediatric Adenotonsillectomy, p. 12
• Clinical knowledge: Nelson Textbook of Pediatrics, ACPCF Guidelines, ERS/ATS Pediatric Respiratory Guidelines