Newborn resuscitation, Apgar and cyanosis

Neonatal Resuscitation, Congenital Conditions & Neonatal Jaundice

• Cholestasis: Pale stools, dark urine or conjugated bilirubin elevation needs urgent paediatric/hepatology referral. Ultrasound assesses anatomy, but normal findings do not exclude biliary atresia. HIDA is not a mandatory preliminary test and can delay definitive assessment. Earlier Kasai surgery improves chances; presentation after 60 days does not make transplantation inevitable.

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Neonatal Resuscitation & ARC Guidelines

Approximately 85% of term neonates breathe spontaneously within 10 to 30 seconds of birth, a further 10% respond to drying and tactile stimulation, approximately 3% to 5% require positive pressure ventilation, and fewer than 0.1% require external cardiac compressions or emergency resuscitation drugs. The Australian Resuscitation Council (ARC) guideline algorithms provide a structured, sequential framework for neonatal resuscitation based on rapid, repeated assessments of breathing, heart rate, and tone.

Step-by-Step ARC Resuscitation Hierarchy

1. Thermal Protection & Airway Positioning (The First 30 Seconds):

   • Drying & Warming: Immediately dry the infant thoroughly with warm towels and discard wet linen. In infants born at $< 32\text{ weeks}$ gestation, place the infant directly into a polyethylene occlusive bag or wrap under a radiant warmer without drying to prevent evaporative heat loss.
   • Positioning: Position the neonate supine with the head in the "sniffing" position (neutral neck extension). Overextension or flexion collapses the highly compliant neonatal pharyngeal airway.
   • Airway Clearance: Routine suctioning of the mouth and nose is contraindicated, even in the presence of meconium-stained liquor, as it induces vagal bradycardia, laryngeal spasm, and delayed onset of spontaneous breathing. Suctioning (under direct vision using a wide-bore suction catheter at negative pressures not exceeding $100\text{ mm Hg}$) is strictly reserved for airway obstruction caused by copious secretions, vernix, blood, or thick particulate meconium.
   • Tactile Stimulation: Gentle flicking of the soles of the feet or rubbing the back during drying provides sufficient stimulation. Vigorous shaking or slapping is harmful.

2. Assessment of Respiration & Heart Rate:

   • Auscultation: Precordial auscultation with a stethoscope is the most rapid and reliable clinical method to assess heart rate. Palpation of the umbilical cord pulse frequently underestimates heart rate.
   • Preductal saturation: Place the probe on the right hand/wrist. ANZCOR targets 80–90% at five minutes and 85–90% at ten; titrate oxygen rather than imposing adult targets immediately after birth.
   • Electrocardiography (ECG): Three-lead ECG provides continuous, artifact-free cardiac rate tracking during complex resuscitations.

3. Positive Pressure Ventilation (PPV):

   • Indications: Persistent apnoea, gasping respirations, or a heart rate $< 100\text{ bpm}$ despite initial drying, warming, and stimulation.
   • Inspired Oxygen Concentration: In term infants ($\ge 37\text{ weeks}$), initiate PPV with room air ($21\%\text{ O}_2$). Hyperoxia causes free radical oxidative injury to neonatal myocardial and cerebral vascular beds. In preterm infants ($< 35\text{ to }37\text{ weeks}$), initiate PPV with $21\%\text{ to }30\%\text{ O}_2$, titrating according to pre-ductal target ranges.

• Newborn ventilation: ANZCOR suggests an initial PIP of 30 cm H2O for term infants and 20–25 for premature infants, then titration to chest movement and a sustained heart-rate rise. Ventilate about 40–60 times/min with appropriate PEEP equipment; a number is a starting point, not proof of effective ventilation.
  • Assessment of Ventilation: The primary indicator of successful PPV is a rapid rise in heart rate. If heart rate does not improve and chest rise is absent, apply the MR SOPA troubleshooting sequence: Mask adjustment, Reposition airway, Suction mouth and nose, Open mouth slightly, Pressure increase (increment by $5\text{ cmH}_2\text{O}$ up to $30\text{ to }35\text{ cmH}_2\text{O}$), and Alternative airway (laryngeal mask airway or endotracheal intubation).

1. Chest Compressions:

   • Indication: Heart rate remaining $< 60\text{ bpm}$ despite 30 seconds of effective positive pressure ventilation that produces visible bilateral chest movement.
   • Technique: The two-thumb encircling-hands technique is superior to the two-finger method, delivering higher peak systolic pressures and coronary perfusion pressures. Place both thumbs over the lower third of the sternum (just below the intermammary line) with fingers encircling the thorax supporting the spine. Compress the sternum to a depth of one-third of the anterior-posterior diameter of the chest.
   • Compression-to-Ventilation Ratio: Maintain a strict 3:1 ratio (3 compressions followed by 1 breath, achieving 90 compressions and 30 inflations per minute—a total of 120 events per minute).
   • Supplemental Oxygen: Increase inspired oxygen to 100% ($1.0\text{ FiO}_2$) as soon as chest compressions are commenced. Once the heart rate recovers above $60\text{ bpm}$, compressions cease, and oxygen is titrated downward.

2. Vascular Access & Emergency Resuscitation Medications:

   • Umbilical Venous Catheterization (UVC): The preferred route for emergency intravenous access. Insert an umbilical catheter $3\text{ to }5\text{ cm}$ until free blood flow is aspirated (avoid advancing into portal hepatic circulation).
   • Adrenaline (Epinephrine): Indicated if heart rate remains $< 60\text{ bpm}$ despite at least 60 seconds of coordinated chest compressions and effective 100% oxygen ventilation. Dose: $10\text{ to }30\text{ mcg/kg}$ ($0.1\text{ to }0.3\text{ mL/kg}$ of $1:10,000$ concentration [$0.1\text{ mg/mL}$]) administered rapidly via UVC, followed by a $1\text{ to }3\text{ mL}$ normal saline flush. Endotracheal adrenaline ($50\text{ to }100\text{ mcg/kg}$) is less effective but may be considered while obtaining vascular access.
   • Volume Expansion: Indicated when there is suspected fetal hypovolaemia (placental abruption, vasa praevia, fetomaternal haemorrhage, severe pallor, poor capillary refill, weak pulses unresponsive to ventilation). Administer $10\text{ mL/kg}$ of $0.9\%$ normal saline or uncrossmatched O-negative packed red blood cells as an intravenous infusion over 5 to 10 minutes.

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The APGAR Scoring System

Record Apgar at one and five minutes; if the five-minute score is below seven, repeat every five minutes to twenty minutes under protocol. It documents condition/response and must not delay ventilation. A score alone does not predict an individual neurological outcome.

APGAR Components and Point Allocation

• Appearance (Colour): 0 Points: Generalized cyanosis or pallor; 1 Point: Acrocyanosis (pink trunk, blue extremities); 2 Points: Completely pink body and extremities
• Pulse (Heart Rate): 0 Points: Absent ($0\text{ bpm}$); 1 Point: $< 100\text{ bpm}$; 2 Points: $\ge 100\text{ bpm}$
• Grimace (Reflex Irritability): 0 Points: No response to tactile stimulation; 1 Point: Grimace / weak whimper; 2 Points: Vigorous cry, sneeze, cough, active withdrawal
• Activity (Muscle Tone): 0 Points: Completely limp, flaccid; 1 Point: Some flexion of arms and legs; 2 Points: Active, well-flexed extremities with spontaneous movement
• Respiration (Respiratory Effort): 0 Points: Absent (apnoea); 1 Point: Slow, irregular, gasping, shallow; 2 Points: Vigorous crying, regular rhythmic breathing

Clinical Interpretation & Common Exam Traps

• Resuscitation Precedence: The APGAR score is a retrospective tool used to document clinical recovery and the response to interventions. Resuscitation must never be delayed to await or calculate the 1-minute APGAR score. Clinical actions are guided instantaneously by the heart rate and respiratory effort.
• Score Categorization: A score of $7\text{ to }10$ is normal; $4\text{ to }6$ indicates moderate physiological depression; $0\text{ to }3$ reflects severe depression requiring advanced resuscitation.
• Acrocyanosis: Peripheral cyanosis of the hands and feet is physiological in the first 24 to 48 hours of life due to peripheral vasoconstriction and vasomotor instability. Acrocyanosis can reduce the Appearance component by one point; document each component rather than assuming a standard score for every healthy term infant.

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Cyanosed or collapsing infant after transition

Central cyanosis, poor feeding, tachypnoea, weak pulses or shock after the first days can reflect congenital cardiac disease, sepsis, lung disease or pulmonary hypertension. Duct-dependent lesions may present as the duct closes rather than immediately at birth. Check pre/post-ductal saturation where appropriate, pulses, perfusion, glucose and acid–base status, while supporting ABCs and obtaining urgent neonatal/cardiology/retrieval advice. Echocardiography clarifies anatomy. The specialist may recommend prostaglandin to maintain duct patency with monitoring for apnoea and other adverse effects. Do not force every mixed-circulation infant to adult saturation targets: excessive oxygen can worsen the pulmonary/systemic balance. Conversely, do not withhold indicated oxygen from a genuinely hypoxaemic sick infant; the target is diagnosis- and patient-specific. A well-looking external heart examination does not exclude critical disease.

Primary references (checked 7 October 2026): ANZCOR newborn ventilation.