Respiratory distress assessment and management

Initial Assessment - First Look, Act Fast

Rapidly assess using the Pediatric Assessment Triangle (PAT) to determine if the child is "sick" or "not sick" before touching them.

• Appearance (TICLS Mnemonic 📌):
  • Tone, Interactiveness, Consolability, Look/Gaze, Speech/Cry.
  • Most important limb for brain perfusion & CNS function.
• Work of Breathing:
  • Visual: Nasal flaring, retractions (subcostal, intercostal, suprasternal), head bobbing.
  • Audible: Stridor, wheezing, grunting.
• Circulation to Skin:
  • Assesses peripheral perfusion.
  • Signs: Pallor, mottling, cyanosis.

⭐ Grunting is an ominous sign of impending respiratory failure. It is the body's attempt to create auto-PEEP (Positive End-Expiratory Pressure) to keep alveoli open.

Etiology & X-Rays - The Usual Suspects

• Upper Airway Obstruction (Stridor)

  • Croup (Laryngotracheobronchitis): Viral (Parainfluenza). X-Ray (AP Neck) shows Steeple Sign (subglottic narrowing).

  • Acute Epiglottitis: Bacterial (H. influenzae, Strep.). X-Ray (Lateral Neck) shows Thumb Sign (swollen epiglottis).

• Lower Airway Obstruction (Wheeze/Crackles)

  • Bronchiolitis: RSV is the main cause in children < 2 years. X-Ray shows hyperinflation, atelectasis, and peribronchial thickening.
  • Foreign Body Aspiration (FBA): Inspiratory films may be normal. Expiratory X-Ray is key, showing unilateral air trapping (hyperlucency).
  • Pneumonia: X-Ray reveals lobar consolidation, interstitial infiltrates, or air bronchograms.

⭐ Exam Favourite: Croup's "Steeple sign" is best seen on an AP view of the neck, whereas the "Thumb sign" of epiglottitis requires a lateral view.

📌 Mnemonic: Think of a church steeple for Croup, and a thumb print for Epiglottitis.

Severity Scoring - Grading the Gasp

• Silverman-Andersen Score (SAS): Assesses respiratory work in neonates. Score 0 (normal) to 10 (severe).
• Downe's Score: Modified for older children; includes respiratory rate, air entry, and cyanosis.

• SAS Components & Scoring (0, 1, or 2):
  • Upper Chest Movement (Sync vs. Lag vs. Seesaw)
  • Lower Chest Retractions
  • Xiphoid Retractions
  • Nasal Flaring
  • Expiratory Grunt
• Interpretation:
  • Score <4: Mild distress
  • Score 4-6: Moderate distress
  • Score >7: Impending respiratory failure

⭐ Expiratory Grunting: A key sign of significant distress. It's the body's attempt to create auto-PEEP (Positive End-Expiratory Pressure) to keep alveoli from collapsing.

Management - The Rescue Plan

• Universal First Steps:
  • Positioning: Position of comfort (e.g., tripod); avoid agitating the child.
  • Oxygen: Titrate to maintain SpO₂ >94% via high-flow nasal cannula (HFNC) or mask.
  • Monitoring: Continuous cardiac and pulse oximetry.
• Targeted Rescue Therapy:
  • Croup: Nebulized Adrenaline (1:1000, max 5ml); Dexamethasone (0.6 mg/kg).
  • Anaphylaxis: IM Adrenaline (0.01 mg/kg of 1:1000).
  • Asthma: Nebulized Salbutamol + Ipratropium; IV MgSO₄.
  • Foreign Body: Heimlich maneuver → Rigid Bronchoscopy.
• Advanced Support:
  • Consider Non-Invasive Ventilation (CPAP/BiPAP) for ↑ work of breathing.
  • Intubate for impending respiratory failure (exhaustion, ↓ GCS, severe hypoxia/hypercarbia).

⭐ In severe croup, nebulized adrenaline provides rapid relief (10-30 min) but is temporary (~2 hrs). Always pair with steroids for their longer-lasting anti-inflammatory effect.

• The Silverman-Andersen score is crucial for assessing neonatal respiratory distress.
• Grunting is an auto-PEEP mechanism to prevent alveolar collapse; it's a key sign of distress.
• Croup presents with a barking cough and steeple sign; treat with nebulized adrenaline and steroids.
• Epiglottitis shows the thumb sign on X-ray; secure the airway immediately.
• Bronchiolitis (RSV) in infants <2 years is managed supportively; avoid routine steroids.
• Foreign body aspiration requires rigid bronchoscopy for diagnosis and removal.