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HLT-RESP80-06 · Lesson 9 · 36 clock hours · demo

Neonatal and Pediatric Respiratory Care Fundamentals

Objective. Students will describe how neonatal and pediatric respiratory anatomy, physiology, and normal values differ from adult parameters, and correctly set up and operate a simulated neonatal resuscitation and continuous positive airway pressure (CPAP) system on an infant manikin.

⚠ Pending professional review

This lesson, its worked examples and its practice questions has not yet been verified by a licensed clinician in the field or by a certification or approval body. It is a study draft and may contain errors. Do not use it to make decisions about any patient or medication. Always follow your instructor, your supervising professional, and current official references and regulations.

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Neonatal and Pediatric Respiratory Care Fundamentals

Neonates and children are not simply small adults. Their respiratory anatomy, physiology, and normal values differ significantly from adult parameters, and these differences drive every clinical decision you make — from choosing equipment to setting pressures and rates. Understanding these distinctions is essential for safe, effective care and is directly tested on the NBRC credentialing exams.

Anatomical Differences

Neonatal and pediatric airways are smaller, shorter, and more compliant than adult airways. The infant larynx sits higher in the neck, the epiglottis is relatively large and omega-shaped, and the narrowest point of the airway is the subglottic region (below the vocal cords) rather than the glottic opening. This means uncuffed endotracheal tubes are often used in neonates and young infants, though current evidence supports careful use of cuffed tubes in older pediatric patients.

Infants are obligate nasal breathers for the first several months of life. Nasal congestion alone can cause significant respiratory distress. The chest wall of a neonate is highly compliant — the ribs are cartilaginous and horizontal, contributing little to chest expansion. This places nearly all the work of breathing on the diaphragm. When the infant tires, respiratory failure can develop rapidly.

Anatomical dead space in the neonate is small in absolute terms but proportionally similar to adults when calculated as approximately 2 mL/kg. Tidal volume is also roughly 5–7 mL/kg across age groups, but because body weight is far lower, the actual volumes delivered are very small. A term neonate weighing 3 kg requires tidal volumes in the range of 15–21 mL — any large pressure or volume error is immediately dangerous.

Normal Values: Neonate vs. Pediatric vs. Adult

Respiratory rate is the most immediately noticeable difference. Neonates normally breathe at 40–60 breaths per minute. Infants (1–12 months) breathe at approximately 30–50 breaths per minute. Children (1–8 years) range from about 20–30 breaths per minute. Adults breathe at 12–20 breaths per minute. Rates above these ranges indicate tachypnea and potential respiratory distress.

Normal oxygen saturation targets vary in neonates, particularly in premature infants, where excessive oxygen can contribute to retinopathy of prematurity. Target SpO₂ ranges for premature neonates are institution-specific and should always be confirmed against current clinical guidelines and the care team's orders.

Common Neonatal Respiratory Conditions

Respiratory Distress Syndrome (RDS): Caused by surfactant deficiency, most common in premature infants. Surfactant reduces alveolar surface tension; without it, alveoli collapse at end-expiration. Treatment includes surfactant replacement therapy and CPAP or mechanical ventilation.

Transient Tachypnea of the Newborn (TTN): Caused by delayed reabsorption of fetal lung fluid, typically in term or near-term infants. Usually self-limited; supplemental oxygen and supportive care are the mainstays.

Meconium Aspiration Syndrome (MAS): Occurs when a neonate inhales meconium-stained amniotic fluid, leading to airway obstruction, chemical pneumonitis, and surfactant inactivation.

Bronchiolitis: The most common lower respiratory tract infection in infants, usually caused by respiratory syncytial virus (RSV). Characterized by wheezing and increased work of breathing.

Neonatal Bag-and-Mask Ventilation: Safety Principles

During resuscitation, bag-and-mask ventilation is a critical skill. Key safety points include:

Bubble CPAP: Setup and Principles

Continuous Positive Airway Pressure (CPAP) keeps the alveoli open at end-expiration, reducing the work of breathing and improving oxygenation. Bubble CPAP is a simple, effective delivery system widely used in neonatal care. In a bubble CPAP circuit, gas flows through a nasal interface into the infant's airway; the expiratory limb of the circuit is submerged in a water column. The depth of submersion in centimeters of water equals the PEEP (positive end-expiratory pressure) delivered — for example, submersing the expiratory tube 5 cm deep delivers approximately 5 cmH₂O PEEP.

Setup steps include: assembling the circuit, filling the water chamber to the prescribed level, connecting the prescribed gas source and FiO₂, fitting the appropriately sized nasal prongs, confirming flow causes gentle bubbling, and documenting all parameters on the neonatal flow sheet.

Safety: Never leave a nasal interface that is too tight or improperly positioned — nasal septum injury is a recognized complication of prolonged nasal CPAP. Reposition and inspect the nares regularly.

Documentation and Scope of Practice

All neonatal respiratory interventions must be documented accurately on the neonatal respiratory care flow sheet, including FiO₂, flow rate, PEEP, SpO₂, respiratory rate, and any observations. Therapists practice within the scope defined by their state license and institutional protocols. Any change in a neonate's condition must be reported immediately to the supervising provider.

Key terms10

SurfactantA phospholipid substance produced by type II alveolar cells that reduces surface tension in the alveoli, preventing collapse at end-expiration; deficient in premature neonates, leading to Respiratory Distress Syndrome.
Bubble CPAPA method of delivering continuous positive airway pressure to neonates in which the expiratory limb of the circuit is submerged in water; the depth of submersion in centimeters determines the PEEP level.
PEEP (Positive End-Expiratory Pressure)Pressure maintained in the airway at the end of expiration to keep alveoli open and improve oxygenation; the therapeutic target in CPAP therapy.
Anatomical Dead SpaceThe volume of the conducting airways (nose, mouth, trachea, bronchi) where no gas exchange occurs; approximately 2 mL/kg across age groups.
Tidal VolumeThe volume of gas moved in one normal breath; approximately 5–7 mL/kg in neonates, infants, children, and adults, but extremely small in absolute terms in neonates.
Obligate Nasal BreatherA description of young infants who breathe primarily or exclusively through the nose; nasal obstruction can cause significant respiratory distress.
Respiratory Distress Syndrome (RDS)A neonatal lung disease caused by surfactant deficiency, most common in premature infants, characterized by alveolar collapse, hypoxemia, and increased work of breathing.
BarotraumaLung injury caused by excessive airway pressure during mechanical ventilation or manual ventilation; a critical safety concern in neonates due to their small, fragile lungs.
E-C Clamp TechniqueA hand position used during bag-and-mask ventilation in which the fingers form a 'C' around the mask and an 'E' under the jaw to maintain mask seal and proper head position simultaneously.
Transient Tachypnea of the Newborn (TTN)A self-limited neonatal respiratory condition caused by delayed reabsorption of fetal lung fluid, presenting as rapid breathing shortly after birth, most often in term or near-term infants.

Worked examples4

1. A term neonate weighs 3.2 kg. What is the estimated appropriate tidal volume range for this infant?
  1. Recall the target tidal volume guideline: approximately 5–7 mL/kg for neonates.
  2. Multiply the lower limit by the weight: 5 mL/kg × 3.2 kg = 16 mL.
  3. Multiply the upper limit by the weight: 7 mL/kg × 3.2 kg = 22.4 mL.
  4. Round to practical clinical values: the target tidal volume range is approximately 16–22 mL.
Answer: The estimated appropriate tidal volume range for a 3.2 kg term neonate is approximately 16–22 mL.
2. You are setting up a bubble CPAP system. The physician orders 6 cmH₂O of PEEP. To what depth (in cm) must the expiratory limb be submerged in the water column?
  1. Recall the principle of bubble CPAP: the depth of the expiratory limb submerged in water in centimeters equals the PEEP delivered in cmH₂O.
  2. The ordered PEEP is 6 cmH₂O.
  3. Set the submersion depth of the expiratory limb to 6 cm below the surface of the water.
Answer: The expiratory limb must be submerged 6 cm below the surface of the water to deliver 6 cmH₂O PEEP.
3. A neonate weighing 2.8 kg is receiving bag-and-mask ventilation during resuscitation. A colleague is squeezing the bag to produce large, dramatic chest wall movement. Why is this a concern, and what should visible chest rise look like?
  1. Calculate the appropriate tidal volume range: 5–7 mL/kg × 2.8 kg = 14–19.6 mL.
  2. Recognize that large, dramatic chest rise indicates excessive tidal volume and likely excessive peak inspiratory pressure.
  3. Identify the risk: over-distension and excessive pressure can cause barotrauma (e.g., pneumothorax) and hemodynamic compromise in a neonate.
  4. State the correct clinical standard: chest rise during neonatal bag-and-mask ventilation should be gentle and subtle — just visible — confirming adequate but not excessive ventilation.
  5. Note that a manometer in the circuit should be monitored to ensure pressures remain within safe limits.
Answer: Dramatic chest rise indicates excessive pressure and volume delivery, risking barotrauma. Visible chest rise in a neonate should be gentle and subtle. A manometer must be monitored to prevent dangerous peak pressures.
4. Estimate the anatomical dead space for a neonate weighing 2.5 kg, and then for an adult weighing 70 kg, using the 2 mL/kg rule. Compare the results.
  1. Neonate: 2 mL/kg × 2.5 kg = 5 mL anatomical dead space.
  2. Adult: 2 mL/kg × 70 kg = 140 mL anatomical dead space.
  3. Compare: while the ratio of dead space to tidal volume is proportionally similar (roughly one-third of tidal volume in both), the absolute volumes are vastly different — 5 mL vs. 140 mL.
  4. Clinical implication: any added device dead space (e.g., mask, tubing) added to a neonatal circuit can represent a much larger proportion of the infant's total breath volume and must be minimized.
Answer: Neonatal anatomical dead space ≈ 5 mL; adult ≈ 140 mL. Proportionally similar, but the tiny absolute volume in neonates means any extra circuit dead space has a large relative impact.

The math in this lesson1

Learners multiply 5–7 mL/kg by neonatal weight to find a target tidal volume range.
6.RP.3
In class: Comparative lecture-discussion: students complete a structured comparison table contrasting adult vs. neonatal vs. pediatric values for respiratory rate, tidal volume, anatomical dead space, common respiratory conditions, and monitoring parameters, then quiz each other in pairs. · Infant manikin lab: students practice neonatal bag-and-mask ventilation using a properly sized infant mask and self-inflating bag, demonstrating correct head position, seal, ventilation rate, and pressure, with a manometer visible to avoid excessive pressures; instructor scores technique. · Neonatal CPAP setup: students assemble a bubble CPAP circuit, set the prescribed PEEP by adjusting water column depth, fit a simulated nasal interface on an infant manikin, verify flow, and document the setup on a neonatal respiratory care flow sheet.
Materials: Infant resuscitation manikin, infant-size BVM with manometer, infant CPAP system (bubble CPAP or equivalent training model), neonatal nasal prongs interface, comparison table worksheet, neonatal respiratory care flow sheet, AARC Neonatal and Pediatric CPGs
Check: Instructor-observed skills checklist for neonatal BVM ventilation (8 critical steps, including mask seal and appropriate rate and pressure) and CPAP setup (6 steps): students must complete all critical steps correctly on both tasks — no critical errors permitted; retesting required for any critical error.

Practice check8

Answer each question, then check it. Nothing is recorded; this is your own practice.

Neonatal and Pediatric Respiratory Care
1. A normal respiratory rate for a term neonate at rest is which of the following?
Therapeutic Procedures
2. In a bubble CPAP system, what determines the level of PEEP delivered to the patient?
Neonatal and Pediatric Respiratory Care
3. A premature infant at 28 weeks gestation is most likely to develop which respiratory condition due to insufficient surfactant production?
Emergency and Critical Care
4. During neonatal bag-and-mask ventilation, the respiratory therapist notes large, dramatic chest rise with each breath. What is the most significant immediate risk of this finding?
Anatomy and Physiology
5. Which of the following best describes the anatomically narrowest point of the neonatal airway?
Neonatal and Pediatric Respiratory Care
6. A term neonate weighs 3.0 kg. Using 5–7 mL/kg as the target, what is the correct tidal volume range for this infant during mechanical ventilation?
Patient Safety and Quality
7. A respiratory therapist is fitting nasal prongs for bubble CPAP on a neonate. Which of the following is a recognized complication of improperly fitted or excessively tight nasal CPAP prongs?
Neonatal and Pediatric Respiratory Care
8. A 6-week-old infant presents with wheezing, increased work of breathing, and nasal congestion during winter. The most likely causative organism for this lower respiratory tract infection is:
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