2.1 Neonatal Resuscitation Program (NRP) Guidelines

Neonatal Resuscitation Program (NRP) Guidelines

Physiological Transition and the "Golden Hour"

Neonatal resuscitation at birth requires rapid, highly coordinated intervention because the transition from fetal to extrauterine life is the most complex physiological change in the human lifespan. In utero, the placenta serves as the organ of gas exchange, and pulmonary vascular resistance (PVR) is high. This high resistance shunts blood away from the lungs via the patent ductus arteriosus (PDA) and foramen ovale. At birth, as the infant cries and takes their first breath, lung expansion leads to a dramatic drop in PVR, closure of these shunts, and a massive increase in pulmonary blood flow. However, approximately 10% of newborns require some assistance to begin breathing, and less than 1% require intensive resuscitative measures.

Preparation begins before the birth. The resuscitator must ask the obstetric provider four critical pre-birth questions to identify potential risk factors:

1. What is the expected gestational age?
2. Is the amniotic fluid clear?
3. Are there any additional risk factors? (e.g., maternal hypertension, chorioamnionitis, fetal distress)
4. What is the umbilical cord management plan? (e.g., delayed cord clamping)

Based on these answers, the resuscitation team must assemble the necessary equipment and assign specific roles. A standardized pre-resuscitation checklist ensures that all equipment is present and functioning, including suction, ventilation bag, oxygen source, intubation equipment, and emergency medications.

Initial Steps of Resuscitation

Immediately following birth, the clinician assesses three key indicators to determine if the infant can remain with the mother:

• Gestation: Is the baby term?
• Tone: Does the baby have good muscle tone (active flexion)?
• Respiration: Is the baby breathing or crying?

If the answer to all three is "yes," the infant remains with the mother for routine care, which includes placing the infant skin-to-skin, warming, drying, and initiating breastfeeding.

If the answer to any of these is "no," the infant is moved to a pre-warmed radiant warmer for the initial steps (completed in the first 30 seconds of life):

1. Provide warmth: Maintain the infant under the radiant warmer to prevent cold stress.
2. Position the airway: Place the head in a neutral or "sniffing" position. Avoid hyperextension or hyperflexion of the neck, which can collapse the airway.
3. Clear secretions: If secretions are obstructing the airway or if PPV is anticipated, suction the mouth first, then the nose ("M before N"). Use a bulb syringe or a suction catheter set to a negative pressure of 80 to 100 mmHg.
4. Dry: Dry the infant to prevent evaporative heat loss (omit for infants <32 weeks, who should be placed immediately in a polyurethane wrap).
5. Stimulate: Gently rub the back or flick the soles of the feet to encourage breathing.

Positive Pressure Ventilation (PPV)

If the infant is apneic, gasping, or has a heart rate less than 100 beats per minute (bpm) after the initial steps, positive pressure ventilation (PPV) must be initiated immediately. PPV is the single most important and effective step in neonatal resuscitation.

• Timing: PPV must start within 60 seconds of birth ("the Golden Minute").
• Parameters:
  • Ventilation Rate: 40 to 60 breaths per minute.
  • Pressures: Initial Peak Inspiratory Pressure (PIP) of 20 to 25 cm H2O. Term infants may require a higher PIP of 30 to 40 cm H2O for the first few breaths to expand the lungs. Positive End-Expiratory Pressure (PEEP) of 5 cm H2O is highly recommended to maintain functional residual capacity.
  • Oxygen Concentration: For infants >= 35 weeks, start PPV with 21% O2 (room air). For infants < 35 weeks, start PPV with 21% to 30% O2. Titrate based on pre-ductal pulse oximetry.
• Monitoring: Place a pulse oximeter probe on the right hand or wrist (pre-ductal circulation, representing blood flow before the ductus arteriosus). Consider placing an ECG monitor for the most rapid and accurate heart rate assessment.

Ventilation Corrective Steps: MR. SOPA

If the heart rate does not increase and the chest is not moving with PPV, the clinician must troubleshoot using the MR. SOPA mnemonic. These steps must be performed in sequence until chest rise is achieved:

• M: Mask adjustment: Reapply the mask and ensure a tight seal.
• R: Reposition airway: Place the head back in the sniffing position. (Give 5 breaths and check chest movement)
• S: Suction mouth and nose: Clear any mucus or secretions using a bulb syringe or suction catheter.
• O: Open mouth: Open the mouth and lift the jaw forward. (Give 5 breaths and check chest movement)
• P: Pressure increase: Increase the PIP by 5 to 10 cm H2O increments (up to a maximum of 40 cm H2O for term infants, or 30 cm H2O for preterm infants). (Give 5 breaths and check chest movement)
• A: Alternative airway: Insert an endotracheal (ET) tube or a laryngeal mask airway (LMA).

Chest Compressions

If the infant's heart rate remains less than 60 bpm despite at least 30 seconds of effective PPV (preferably via an alternative airway that achieves chest rise), chest compressions must begin immediately.

• Preparation: Ensure an alternative airway (ET tube or LMA) is secured. Increase the oxygen concentration (FiO2) to 100%.
• Technique: Use the two-thumb technique. The resuscitator wraps their hands around the infant's chest, placing both thumbs on the lower third of the sternum (just below the intermammary line, avoiding the xiphoid process).
• Depth: Depress the sternum approximately one-third of the anterior-posterior (AP) diameter of the chest.
• Ratio & Rate: Maintain a 3:1 ratio of compressions to ventilations (90 compressions and 30 ventilations per minute, totaling 120 events per minute). Coordinated as: "One-and-two-and-three-and-breathe-and..."
• Reassessment: Assess heart rate after 60 seconds of coordinated compressions.

Epinephrine and Volume Expansion

If the heart rate remains less than 60 bpm after 60 seconds of chest compressions and coordinated ventilation with 100% oxygen, epinephrine is indicated.

• Concentration: Only use the 1:10,000 (0.1 mg/mL) concentration.
• Dose & Routes:
  • Intravenous (IV) or Intraosseous (IO): This is the preferred route. The dose is 0.01 to 0.03 mg/kg (0.1 to 0.3 mL/kg of the 1:10,000 concentration). Administer rapidly, followed by a 0.5 to 1 mL normal saline flush.
  • Endotracheal (ET): While IV/IO access is being established, a single dose may be given via the ET tube. The dose is 0.05 to 0.1 mg/kg (0.5 to 1.0 mL/kg of the 1:10,000 concentration).
  • Repeat epinephrine every 3 to 5 minutes if the heart rate remains under 60 bpm.
• Volume Expanders: Indicated if there is suspected blood loss or signs of shock (pale skin, weak pulses, poor perfusion) and the heart rate fails to respond.
  • Fluid: Normal Saline (0.9% NaCl) or O-negative blood.
  • Dose: 10 mL/kg administered over 5 to 10 minutes.

Target Pre-Ductal SpO2 After Birth

Quick Reference: Resuscitation Drugs and Fluids

• Epinephrine (IV/IO): 0.01–0.03 mg/kg of 1:10,000 solution. Repeat every 3–5 minutes.
• Epinephrine (ET): 0.05–0.1 mg/kg of 1:10,000 solution. Use only while establishing IV access.
• Volume Expander: Normal Saline (0.9% NaCl) or O-negative packed red blood cells. Dose: 10 mL/kg over 5–10 minutes.

NRP Exam Traps and Pearls

• Pre-ductal vs. Post-ductal: Always place the pulse oximeter on the right upper extremity (pre-ductal). Placing it on a lower extremity (post-ductal) will show false low values due to right-to-left shunting through the ductus arteriosus.
• Heart Rate Assessment: The most accurate way to assess heart rate during resuscitation is with a 3-lead ECG. Palpating the umbilical cord insertion or listening with a stethoscope are prone to underestimation, particularly in a bradycardic infant.
• Endotracheal Tube Placement confirmation: The rapid rise in heart rate is the most reliable indicator of successful ventilation. Secondary indicators include colorimetric carbon dioxide detection (which changes from purple to yellow when CO2 is detected), bilateral breath sounds, and chest rise.