Thick Meconium, a Floppy Bradycardic Term Infant, and the First 90 Seconds
At 40 weeks 2 days, a 3,650 g infant is born through thick meconium-stained fluid after a 6-hour labour with a Category I tracing throughout. The infant is placed on the mother's abdomen under a radiant warmer immediately after birth. At 30 seconds the infant is limp, apnoeic, and bradycardic at 60 bpm; a pulse oximeter on the right hand reads 60% at 60 seconds. The midwife has a T-piece resuscitator, a self-inflating bag, blended oxygen, and a functioning suction source. The mother is awake, bleeding is minimal, and the cord has not been clamped. The unit protocol offers delayed cord clamping at 60–180 seconds for vigorous term infants, and the second midwife has just arrived.
1. What do you do in the first 30–60 seconds, and why is delayed cord clamping not appropriate here?
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Immediate actions. At 30 seconds this infant is limp, apnoeic, and at 60 bpm - non-vigorous, and therefore needing resuscitation rather than observation.
- Move the infant to the radiant warmer and begin the initial steps: provide warmth, dry vigorously, discard the wet towel, reposition with slight neck extension, and clear secretions from the mouth and nose only if they are obstructing.
- Stimulate by drying and rubbing the back or slapping the soles.
- Assess respirations and heart rate - auscultate with a stethoscope at the precordium, or use a three-lead ECG if available, because pulse oximetry is unreliable in the first minutes at low saturations.
- Do not spend more than about 60 seconds on the initial steps if she remains apnoeic and bradycardic. Positive pressure ventilation must start by 60 seconds in a term infant.
Why not delayed cord clamping. In a vigorous term infant, DCC of 60–180 seconds increases iron stores and is recommended. In a non-vigorous infant, the priority is lung aeration and effective ventilation; the cord should not delay resuscitation. If the infant can be resuscitated on the warmer immediately adjacent to the bed with the cord intact, that is acceptable, but clamping and cutting must never be a source of delay or a reason to keep an infant in an unsuitable position. Explain quietly to the mother that her baby needs help breathing first and that the cord will be clamped sooner than planned.
Do not perform intrapartum suctioning or routine tracheal intubation for meconium - neither is recommended, and both delay ventilation.
2. She remains apnoeic with a heart rate of 60 bpm. Detail your ventilation strategy: device, oxygen concentration, targets, and troubleshooting.
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Device and technique. Use the T-piece resuscitator for controlled pressures: initial inflation 20–25 cmH₂O (up to 30–40 cmH₂O if the first breaths do not achieve chest movement), then positive end-expiratory pressure of 5–8 cmH₂O, at a rate of 40–60 breaths per minute. A well-fitted mask covering the mouth and nose, with a tight seal.
Oxygen concentration. At term (≥35 weeks), start with 21% oxygen and titrate to the preductal saturation targets: about 60–65% at 1 minute, 65–70% at 2 minutes, 70–75% at 3 minutes, 75–80% at 4 minutes, 80–85% at 5 minutes, 85–95% by 10 minutes. Her documented 60% at 60 seconds is actually within the expected range for that age - do not over-interpret a low saturation in the first minute and do not default to 100% oxygen. Titrate using the blender, and use a three-lead ECG rather than relying solely on a pulse oximeter.
Assessing effectiveness. The single best sign is a rising heart rate. Chest movement, a slow improvement in saturation, and improving tone support this. Reassess within 30 seconds.
Troubleshooting (MR SOPA) if the heart rate does not rise:
- Mask adjustment - reposition and re-seal
- Reposition the head and neck; consider a shoulder roll
- Suction the mouth, then nose, if secretions are blocking
- Open the mouth
- Pressure increase to 30–40 cmH₂O if no chest movement
- Alternative airway - endotracheal intubation or a laryngeal mask if intubation fails
Consider a pneumothorax if chest movement is asymmetric or the heart rate continues to fall despite adequate ventilation. Call for additional help early.
3. At 90 seconds of effective ventilation the heart rate is 55 bpm. Set out the next steps, including drug doses and routes, and explain how the Apgar score will be used.
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Compressions. A heart rate below 60 bpm after at least 60 seconds of confirmed effective ventilation means starting chest compressions. Move to 100% oxygen. Use the two-thumb encircling technique at the lower third of the sternum, with a compression-to-ventilation ratio of 3:1, giving about 90 compressions and 30 breaths per minute. Intubate if not already intubated, since compressions make mask ventilation unreliable. Reassess the heart rate every 60 seconds; stop compressions as soon as it is above 60 bpm.
Epinephrine. If the heart rate remains below 60 bpm after 60 seconds of coordinated compressions and ventilation, give epinephrine:
- IV or intraosseous route (preferred): 0.02 mg/kg of 0.1 mg/mL solution - about 0.14 mg, i.e. 1.4 mL for a 3,650 g infant
- Endotracheal route while access is obtained: 0.05–0.1 mg/kg, recognising that absorption is unpredictable
- Repeat every 3–5 minutes if the heart rate stays below 60 bpm
Also consider a 10 mL/kg isotonic crystalloid bolus or blood if hypovolaemia is suspected (unlikely with minimal maternal bleeding), and treat a pneumothorax by needle decompression if suspected. Do not give sodium bicarbonate or naloxone in the delivery room.
Apgar score. Record it at 1 and 5 minutes, and repeat every 5 minutes up to 20 minutes for a resuscitated infant. Use it for communication and trending, never to guide individual resuscitation steps or to decide when to stop. A low 5-minute score in a preterm or asphyxiated infant is not a diagnosis of asphyxia. Document the interventions given alongside each score, request paired cord gases, and arrange paediatric review and therapeutic hypothermia assessment if there is evidence of an intrapartum hypoxic event.