SS_PA 1.21 Describe the foetal circulation

Within the umbilical cord, there are two veins, and one artery. TRUE / FALSE

Foetal blood returning from the placenta has an oxygen saturation of 80%. TRUE / FALSE

The foramen ovale remains open in the foetus under the influence of prostaglandins. TRUE / FALSE

The ductus arteriosus adds blood into the aorta distal to the vessels supplying the brain. TRUE / FALSE

Following delivery, there is a “transitional” circulation. Target SpO2 levels for a neonate are: 70-90% at 3 mins, and 85-90% at 10 mins. TRUE / FALSE

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