Neonatal Resuscitation Skills: Clinical Simulation for Midwifery Students

Neonates have two critical upper airway characteristics that fundamentally differ from adults. First, they breathe almost exclusively through their nose until 4-6 months of age, making nasal obstruction a critical emergency requiring invasive ventilation. Second, their larynx has a funnel shape (narrow at the cricoid cartilage) rather than cylindrical, meaning endotracheal tubes don't require cuffs and always have some air leak. These anatomical differences necessitate specialized ventilation strategies and explain why adult ventilation protocols cannot be directly applied to neonates.

This section details the critical anatomical and physiological differences between pediatric and adult airways. Anatomically, children have larger heads proportionally, more prominent occiputs, shorter necks, larynges located between C2-C3 (vs C5-C6 in adults), conical airway shapes, shorter and softer epiglottises, and progressive reduction in size from hyoid to cricoid cartilage. The pediatric epiglottis is omega-shaped and more lax, with surrounding tissues more prone to edema. Physiologically, children have higher metabolic oxygen consumption, lower functional residual capacity (leading to faster desaturation), smaller airway diameters (1mm edema reduces area by 75% vs 44% in adults), immature nervous systems with predominant parasympathetic tone (predisposing to bradycardia), and increased sensitivity to sedation medications due to immature neurons and thinner blood-brain barriers.

Pediatric airway anatomy (0-8 years) differs fundamentally from adults: large head, short neck, prominent occiput, large tongue relative to oral cavity, anteriorly angled vocal cords requiring 90°/180° rotation, narrow omega-shaped floppy epiglottis, and high larynx at C3-C4 level. Miller blades are preferred over Macintosh for better epiglottic visualization. Tracheal anatomy shows posterior deviation with carina 2 cm from cricoid, bilateral 45-50° angles, and neonates are obligate nose breathers up to one year. Respiratory mechanics involve horizontally oriented rib cages limiting tidal volume, opposite chest wall-lung movement, and increased chest wall compliance causing lung collapse during expiration. Positive end-expiratory pressure (4-5 cm H2O) is mandatory during abdominal surgery. Diaphragmatic respiration relies on type I fatigue-resistant fibers (only ~10%), with transition to adult fiber composition by age 2. High basal metabolic rate elevates oxygen consumption and CO2 production, necessitating mandatory preoxygenation. Neonatal circulatory physiology exhibits flip-flop circulation: initially high pulmonary vascular resistance prevents pulmonary blood flow; first inspiration expands lungs, increasing pulmonary vascular resistance and redirecting blood to lungs. Parasympathetic overdominance makes neonates highly susceptible to bradycardia, with cardiac output predominantly heart rate-dependent. CPR should be initiated at heart rate <60 bpm (vs 30 bpm in adults).

Neonatal airway anatomy differs significantly from adults: larynx sits higher (C3-C4 vs. C5-C6), epiglottis is longer/narrower/floppy (omega-shaped), and tongue occupies proportionally larger oral cavity space. The Dubowitz score assesses maturity through muscle tone and reflexes. According to Poiseuille's law, resistance increases with the fourth power of radius change; neonates with 4mm airways experience 75% cross-sectional area reduction from just 1mm edema versus 44% in adults. This explains why minor airway changes cause severe respiratory compromise. The fetal-to-neonatal circulatory transition involves first breath generating 40-80 cm H2O pressure for lung expansion, pulmonary vascular resistance drop, and ductus arteriosus closure. Respiratory muscles depend heavily on diaphragm with limited intercostal function and low type I fiber content. Closing capacity often exceeds functional residual capacity, causing atelectasis. Neonatal respiratory control differs: hypoxia suppresses ventilatory response to CO2, baseline PaO2 is lower (16-19 mmHg), and fetal hemoglobin's higher oxygen affinity (P50 19 vs. 17) reduces tissue oxygen delivery during stress.

This section covers Apgar scoring and clinical assessment of neonatal status. The Apgar score assesses five parameters: Appearance (skin color), Pulse (heart rate), Grimace (reflex irritability), Activity (muscle tone), and Respiration (breathing effort). Each is scored 0, 1, or 2. A score of less than 7 at 5 minutes indicates high risk for perinatal asphyxia. This is important for determining eligibility for therapeutic hypothermia. The score is not a predictor of long-term outcome but is useful for identifying babies at risk for hypoxic-ischemic injury.

The Apgar scoring system assesses newborn condition at 1 and 5 minutes after birth using five components: Appearance (skin color), Pulse (heart rate), Grimace (reflex irritability), Activity (muscle tone), and Respiration (breathing effort). Each component scores 0, 1, or 2, with total scores of 10. Scores of 8-10 indicate normal condition, 4-6 indicate mild to moderate distress, and 0-3 indicate severe distress requiring immediate resuscitation. Neonatal asphyxia is defined as inability to initiate spontaneous respiration within 1 minute, corresponding to Apgar score of 3 or less.

The Apgar scoring system evaluates newborn condition at 1 and 5 minutes using five criteria: heart rate, respiratory effort, muscle tone, reflex irritability, and color. Each criterion scores 0, 1, or 2 points, with maximum total of 10. Scores of 7 or higher indicate adequate condition. Assessment of neonatal respiratory distress includes evaluation of respiratory rate (tachypnea >60 breaths/minute), grunting, nasal flaring, retractions, cyanosis, and apnea with bradycardia. Management follows the ABC approach: airway management (clearing secretions), breathing support (oxygen and ventilation), and circulation support. Treatment escalates from conservative measures (supplemental oxygen, CPAP) to invasive ventilation (endotracheal intubation) based on severity. Indications for escalated care include apnea with bradycardia, severe hypoxemia, and respiratory fatigue.

APGAR scores guide newborn intervention: 8-10 indicates no distress, requiring only routine care. 4-7 indicates moderate distress, requiring suctioning, stimulation, positioning, and oxygen therapy. 0-3 indicates severe distress or life-threatening condition, requiring immediate CPR (Cardiopulmonary Resuscitation). The score helps determine whether resuscitation is needed and guides appropriate medical intervention for the newborn's condition.

The APGAR score evaluates newborn vitality at 1 and 5 minutes using five components (Appearance, Pulse, Grimace, Activity, Respiratory effort), each scored 0-2 for a maximum of 10. Appearance: 0 for blue, 1 for pink extremities, 2 for entirely pink. Pulse: 0 absent, 1 <100 bpm, 2 >100 bpm. Grimace: 0 no response, 1 grimace, 2 cry/cough. Activity: 0 limp, 1 partial flexion, 2 active movement. Respiratory effort: 0 absent, 1 slow/gasping, 2 good cry. Vigorous meconium-stained babies (HR >100, good activity) are now managed identically to non-vigorous babies without routine tracheal suctioning. Three organizations define perinatal asphyxia differently: WHO uses simple respiratory failure criteria; NNPD classifies severity by 1-minute APGAR score; AAP requires pathophysiological criteria including acidemia and multi-organ involvement.

Delivery room preparation requires: (1) Hand washing with proper technique (20-30 seconds lathering, rotating hands, 30-second drying), (2) Double gloving for infection prevention, (3) Equipment check including oxygen bag, mask, sheets, and instruments, (4) Room temperature maintenance at 25-28°C with windows and fans off. The resuscitation protocol begins immediately if the baby does not cry: (1) Position baby with head elevated, (2) Stimulate nose, cheeks, and chin, (3) Change to dry sheet, (4) Perform chest compression on lower sternum using two fingers at 30 breaths to 2 compressions ratio.

Delivery room preparation requires: temperature 24-26°C, dimmed lighting, no air currents, and complete equipment including radiant warmer, oxygen supply, suction device, sterile pre-warmed towels, clamps, 8-10 French suction catheter, resuscitation bag, and various sized masks. Medications include eye prophylaxis (erythromycin, tetracycline, or chloramphenicol) and antiseptic solutions for umbilical cord. Newborn resuscitation protocol: for stable babies, skin-to-skin contact immediately; for unstable babies, place on radiant warmer, position airway, aspirate secretions, dry and stimulate, evaluate heart rate and breathing. If heart rate <100 bpm or no breathing, provide positive pressure ventilation (23 breaths/min, 40-60 breaths/min). If heart rate <60 bpm after 30 seconds, add chest compressions and increase oxygen to 100%. If heart rate remains <60 bpm, prepare epinephrine via umbilical or endotracheal catheter. Suctioning requires vacuum pressure of 80-100 mmHg, mouth first then nose, each insertion/aspiration not exceeding 5-10 seconds. Heat loss prevention includes radiation, convection, evaporation, and conduction control. Umbilical cord clamping: early (15-60 seconds) for urgent cases, delayed (1-3 minutes) for stable babies to increase iron stores and reduce anemia risk.

Resuscitation requires at least one medical worker with basic skills, with two persons for high-risk deliveries. For preterm births or IUGR, a pediatrician/neonatologist must be present. Equipment includes resuscitation bags, masks, laryngoscopes, aspirators, and oxygen sources. Room preparation requires: well-lit area with clean, dry, warm surface; radiant warmer; room temperature ≥25°C; closed windows and doors; oxygen tubing connected; equipment tested for integrity. For preterm births (<32 weeks), additional thermal protection is needed with room temperature ≥27-28°C.

Effective infection control requires proper hospital infrastructure: designated gowning/decontamination areas, proper disinfection protocols, and trained cleaning staff. Key measures include: reducing elective surgeries, systematic companion screening, separating medical staff from patients, suspending medical visits, using negative pressure rooms, and HEPA filters. Delivery room management requires the mother to wear a mask upon arrival, with the team using N95/FFP2 masks, eye protection, and impermeable gowns. Neonatal resuscitation requires the room to be separate from the mother, ideally 2 meters away. Intubation and ventilation are critical aerosol-generating moments requiring maximum protection with HEPA filters. Suspected neonatal infection requires clinical assessment based on maternal history of infection 14 days before or 28 days after birth. Most neonates with confirmed infection are asymptomatic or have mild symptoms. Postnatal transmission is considered more likely than vertical transmission. Breastfeeding is encouraged as studies have not detected viral particles in breast milk.

Newborn resuscitation equipment includes pediatric suction machine with disposable catheters (numbers 10 and 12). Daily cleaning and disinfection must occur at the beginning of each day with wet mopping every three hours. After wearing utility gloves, labor tables are cleaned with phenol or bleaching solution after every delivery. Floor and sinks are cleaned with detergent and soft water, keeping floors dry. Table tops, light shades, mirrors, lockers, and trolleys are cleaned with 2% phenol (carbolic acid). For blood or body fluid spillage, the area is wet with chlorine solution for 10 minutes, absorbed with mop, and the mop is decontaminated in chlorine solution before re-mopping. Placenta is discarded in yellow bins, gloves are decontaminated in chlorine solution, and soiled linen is not thrown on the floor.