Transition at birth and delayed cord clamping — formative SAQs

SAQ 1 — Deferred cord clamping for a vigorous term newborn (20 marks, ~15 minutes)

A vigorous term newborn is born by normal vaginal delivery to a well mother. The midwife asks whether to clamp the cord immediately or wait. The mother has read that delayed clamping causes jaundice. [1]

Questions

1. State the recommended cord-clamping strategy for this infant and the timing threshold, with the rationale. (6 marks) [12]
2. Explain the physiological basis of the placental transfusion and why it benefits the term infant. (5 marks) [1]
3. Address the mother's concern about jaundice using the evidence, and state whether deferred clamping raises maternal bleeding risk. (5 marks) [1]
4. State one situation in which you would abandon the cord plan and the action you would take. (4 marks) [12]

Model answer (must-hit)

1. Deferred cord clamping for at least 60 seconds, with the infant held skin-to-skin on the mother and the cord at the level of the infant or below to assist gravity. Rationale: the placental transfusion improves iron stores through six months; it is the standard of care for vigorous term and late-preterm infants who do not need resuscitation. [12] [1]
2. At birth blood transfers from placenta to infant over the first minutes in three phases (rapid first 20 seconds, gravity over 20 to 60 seconds, breathing and uterine contraction completing by about three minutes), transferring roughly a third of neonatal blood volume. The extra iron bound in the transfused red cells sustains ferritin and haemoglobin synthesis through infancy. [1] [4]
3. The Cochrane term review shows a small rise in bilirubin and a small increase in phototherapy use, but no significant increase in harmful hyperbilirubinaemia; the iron-store benefit clearly outweighs the manageable jaundice cost. Deferred clamping does not significantly increase maternal postpartum haemorrhage. [1]
4. If the infant is non-vigorous (apnoeic, gasping, limp, or heart rate under 100), resuscitation takes priority: begin positive-pressure ventilation, ideally with the cord intact if a bedside trolley and trained team are ready, otherwise clamp and move to the warmer. [12]

SAQ 2 — Preterm cord plan and the milking contraindication (20 marks, ~15 minutes)

A 26-week gestation infant is about to be delivered. The obstetric team asks the neonatal registrar for the cord management plan. A colleague suggests cord milking to speed the transfusion. [2]

Questions

1. State the recommended cord strategy for this infant and the timing, with the warming measures required. (6 marks) [2]
2. State the preterm-specific benefits of a placental transfusion. (4 marks) [2]
3. Address the suggestion of cord milking: is it appropriate here, and why? Name the evidence. (6 marks) [3]
4. Describe how intact-cord resuscitation would be delivered if the infant is non-vigorous. (4 marks) [13]

Model answer (must-hit)

1. Deferred cord clamping for at least 30 to 60 seconds, ideally with intact-cord stabilisation at a bedside trolley. Warming: plastic wrap without drying, an exothermic thermal mattress, a hat, raised ambient temperature, and a rehearsed team — because hypothermia during the cord minute undoes the transfusion benefit. [2] [13]
2. Lower rates of intraventricular haemorrhage, fewer blood transfusions, better circulatory stability, and in some analyses lower mortality; the preterm circulation tolerates abrupt loss of placental return poorly, so a gentler transfusion-supported transition is protective. [2]
3. Cord milking is contraindicated for this infant. The Katheria 2019 JAMA trial showed that intact-cord milking, compared with deferred clamping, caused an excess of severe intraventricular haemorrhage in infants under 28 weeks and was stopped early. The correct approach is deferred clamping with active warming, not milking. [3]
4. At a bedside trolley with the cord attached, provide warmth, assess tone, breathing and heart rate, and begin positive-pressure ventilation in air or low oxygen if the infant is apnoeic, gasping or bradycardic. This allows the placental transfusion to continue while respiration is established; if the infant cannot be stabilised on the cord, clamp and move for advanced resuscitation. [13]