Advanced Neonatal Resuscitation

Overview

The Neonatal Resuscitation Algorithm

Step 0 - Rapid Initial Assessment (First 30 seconds - the "Golden Minute")

1. Term gestation?
2. Good muscle tone?
3. Breathing or crying?

Pre-Resuscitation Preparation

• Radiant warmer, warm blankets, polyethylene wrap (for premature infants)
• Suction: bulb syringe + mechanical suction catheters (5, 8, 10 Fr); wall suction set to <100 mmHg
• BVM: self-inflating 450/750 mL or flow-inflating 250/450 mL with premature/newborn/infant masks
• Laryngoscope with straight Miller blades (00, 0, 1)
• ETTs (2.5, 3.0, 3.5, 4.0 mm), uncuffed with stylets
• Pediatric CO2 detector / colorimetric capnography
• Umbilical catheters (3.5 and 5 Fr) + catheterization supplies
• Meconium aspirator

• Gestational age, multiple gestation?
• Meconium present?
• Maternal fever or infections?
• Medications or drugs taken?
• Prenatal care / prenatal ultrasound abnormalities?

Step 1 - Warming and Initial Stabilization

• Place under radiant warmer; dry and stimulate (rub back, flick soles of feet)
• Goal temperature: normothermia; axillary target 36.5°C
• Polyethylene wrap (from neck down) or warm blankets prevent evaporative heat loss. Beanies reduce head heat loss
• Hypothermia is an independent risk factor for neonatal mortality worldwide; hyperthermia causes neonatal encephalopathy
• Controlled therapeutic hypothermia is only appropriate in tertiary centers for infants with hypoxic-ischemic encephalopathy (HIE), initiated within hours of birth - never in the delivery room as a default

• Avoid both under-extension and hyperextension (both obstruct)
• A 1-inch towel roll under the shoulders helps maintain proper positioning
• Deep/routine suctioning is not recommended - it causes vagal bradycardia and reduces cerebral blood flow. Suction only if obvious airway obstruction exists, or if a non-vigorous infant has meconium

Step 2 - Positive Pressure Ventilation (PPV)

• Apnea or gasping respirations
• HR < 100 beats/min
• Persistent central cyanosis despite free-flow O2

Oxygen Targets - Key 2020/2025 NRP Change

Step 3 - Endotracheal Intubation

• Tracheal suctioning for meconium in non-vigorous infants
• BMV ineffective or prolonged
• Chest compressions are being performed
• Extremely low birth weight infants
• Anatomic anomalies (diaphragmatic hernia, tracheoesophageal fistula)

If the Intubated Infant Deteriorates - DOPE + MR SOPA

• DOPE = Displacement of ETT, Obstruction, Pneumothorax, Equipment failure
• MR SOPA = Mask adjustment, Reposition airway, Suction, Open mouth, Pressure increase, Airway alternative

Step 4 - Chest Compressions

• Both hands encircle the chest, fingers support the back
• Thumbs placed side-by-side (or one over the other) just below the nipple line on the sternum
• This method generates higher peak systolic pressure and is preferred when two providers are present
• Depth = one-third of the anteroposterior chest diameter

• 90 compressions/min + 30 breaths/min = 120 events/min
• Compression:ventilation ratio = 3:1 (neonates - asphyxia-first physiology)
• If primary cardiac cause is certain: 15:2 ratio may be considered

Step 5 - Vascular Access

• Easiest, fastest access in the delivery room
• Insert 3.5 Fr (for <3.5 kg) or 5 Fr catheter to approximately 5 cm - until blood return is obtained
• Remove once infant is stabilized and alternative access is secured (risk: portal vein thrombosis, infection)

• Faster to place than UVC in simulated resuscitations (~1 min faster even for skilled providers)
• Preferred sites: distal femur (midline, ~1 cm above superior border of patella) or proximal tibia (~2 cm below tuberosity)
• Caution in premature infants due to bone fragility and small IO space

Step 6 - Medications

Epinephrine

• Indication: Asystole or persistent HR < 60 beats/min despite effective ventilation + ongoing chest compressions
• IV/IO dose: 0.01-0.03 mg/kg (0.1-0.3 mL/kg of 0.1 mg/mL solution) - IV is the preferred route
• ETT dose (if no IV access): 0.05-0.1 mg/kg - higher dose required; efficacy is less certain
• Repeat: Every 3-5 minutes
• Unlike adult resuscitation, there is no minimum dose - strict weight-based dosing applies

Volume Expansion

• When: Suspected hypovolemia - pallor, weak pulse, failure to respond to other measures; maternal/fetal hemorrhage, placental transection, early cord clamping
• Fluid: Normal saline, Lactated Ringer's, or O-negative packed RBCs
• Dose: 10 mL/kg IV over 5-10 minutes; may repeat as needed
• Full-term infants: higher boluses (20 mL/kg) can be used
• Premature infants: avoid rapid volume expansion - increases risk of intraventricular hemorrhage (IVH)

Glucose (D10W)

• Concomitant hypoglycemia is common in depressed neonates
• Treat glucose <40 mg/dL with symptoms: 2-4 mL/kg D10W IV, then continuous infusion at 80-100 mL/kg/day
• Avoid higher concentrations (D25W, D50W) - risk of cerebral osmotic injury

Sodium Bicarbonate

• Not routinely recommended in acute neonatal resuscitation
• May be considered in NICU when ventilation is known to be adequate and metabolic acidosis is documented

Antibiotics (post-resuscitation)

• Not indicated during acute resuscitation phase
• If sepsis suspected after stabilization: ampicillin (100 mg/kg IV) + gentamicin (4 mg/kg)
• Cefotaxime preferred over ceftriaxone (ceftriaxone raises risk of kernicterus)

Special Situations

Meconium-Stained Amniotic Fluid (MSAF)

• Most meconium aspiration occurs in utero, so routine intubation + suctioning is no longer recommended for all MSAF infants
• Vigorous infants with MSAF: No routine tracheal suctioning; provide routine care
• Non-vigorous infants with MSAF (poor tone, poor respiratory effort, HR <100 after 1 minute of PPV): consider laryngoscopy + ETT suctioning via meconium aspirator attachment
• Overly vigorous oropharyngeal suctioning itself causes bradycardia - be judicious

Premature Infants (<35 Weeks)

• Depressed neonates are predominantly very low birth weight (<1500 g)
• Requires 2+ providers (airway + compressions) + a third for IV access/medications
• Polyethylene bag/wrap from neck down is particularly important - they lose heat rapidly
• Initial FiO2: 21-30%, titrate carefully to avoid hyperoxia (associated with IVH, retinopathy)
• Avoid rapid volume infusion (IVH risk)
• Lower IO bone threshold: bone fragility limits IO placement

Congenital Anomalies to Consider When Resuscitation Fails

• Pneumothorax (1% incidence) - unequal breath sounds, high peak pressures
• Tracheoesophageal fistula (1:3,000-5,000 births)
• Congenital diaphragmatic hernia (1:2,000-4,000 births)
• Choanal atresia, laryngeal webs

Cord Clamping (2025 AHA Update)

• Deferred cord clamping for at least 60 seconds is now recommended for most newborns proceeding to normal transition
• Benefits: increased blood volume, reduced IVH in preterms, improved hematologic outcomes

Discontinuing Resuscitation

• If no signs of life (no HR) after 10 minutes of complete and adequate resuscitative efforts, it is appropriate to consider discontinuing
• Factors favoring continuation: potentially reversible cause (e.g., hypothermia), uncertain gestational age
• Survival with good outcome becomes increasingly unlikely after 10 minutes of asystole; this is a shared decision with the team and family

Apgar Score at a Glance

• 5-7: Stimulation + blow-by O2 (mildly asphyxiated)
• 3-4: Temporary bag-mask PPV (moderate depression)
• 0-2: Immediate intubation + possible chest compressions (severe depression)

Post-Resuscitation Care

• Transfer to NICU with continuous monitoring (HR, SpO2, glucose, temperature)
• Avoid hyperthermia
• Therapeutic hypothermia for HIE: 33.5-34.5°C for 72 hours, in tertiary centers only, initiated within 6 hours of birth
• Team debriefing after every resuscitation event

2025 AHA/AAP Key Updates (PMID 41122887)

1. Deferred cord clamping ≥60 seconds for most newborns
2. Skin-to-skin contact prioritized for all stable infants
3. Room air (21%) for term infants; 21-30% for preterm
4. 100% O2 only when HR <60 or compressions are in progress
5. Chest compression threshold re-examined - 2025 systematic review (PMID 40360699) questions the precise HR cutoff for initiating compressions, noting evidence gaps for the 60 bpm threshold