Neonatal assessment and transitional care — structured oral station (12 minutes)

Opening prompt — "What do these Apgar scores and cord gas tell you?"

Model response — separate the tools: ^[1][2]

• "The Apgar score tells me how the baby was at one and five minutes — a description of condition. It does not tell me why, and it is not evidence of asphyxia on its own."^[1]
• "The cord arterial gas tells me what the baby experienced before birth: a pH of 6.92 with a base deficit of 14 mmol/L is significant metabolic acidaemia, meeting the ACOG and AAP criteria for an acute peripartum event."^[2][3]

Examiner is listening for: the Apgar describes, the gas attributes; never load a diagnosis onto the Apgar. ^[1]

Probe 1 — "The parents ask if this baby has brain damage."

• "I cannot predict an individual child's outcome from an Apgar or a cord gas. What I can say is that the cord gas shows the baby was acidotic at birth, which is why we are watching closely and why the neonatal team is involved."
• "I would be honest about uncertainty, avoid the word 'asphyxia' unless it is a formal diagnosis, and commit to close monitoring and a follow-up conversation."^[1][3]

Probe 2 — "How did you confirm the arterial sample was truly arterial?"

• "A genuine pair shows an arteriovenous pH difference of at least 0.02 to 0.05 and a carbon dioxide difference. I double-clamp a segment and sample the thick-walled artery and the thin-walled vein. If the values were near-identical I would suspect I sampled the same vessel twice, and the reassuring venous value could not be trusted."^[4]

Probe 3 — "What is the preductal saturation target at 10 minutes, and where does the probe go?"

• "The probe goes on the right hand or wrist — preductal. The target at 10 minutes is 85 to 90%. The reference range rises slowly after birth, from around 60 to 70% at one minute."^[5]

Probe 4 — "The preductal saturation is 89% and the postductal is 82%. Interpret."

• "That is a failed pulse-oximetry screen for critical congenital heart disease — either value under 90%, or a pre-postductal difference over 3 percentage points. I would examine for murmurs and femoral pulses, request paediatric cardiology review and an echocardiogram, and consider prostaglandin therapy while I wait. The false positives are frequently other significant illness, not noise."^[6]

Probe 5 — "What will you watch over the first six hours?"

• "Temperature, heart and respiratory rate, blood glucose on the risk schedule, and the oximetry screen. Feeding and behaviour — a baby who will not wake to feed is being told about by its mother. The escalation triggers are grunting, recession, central cyanosis, temperature instability, poor feeding, lethargy, jitteriness, and bile-stained vomiting."^[1][6]