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About: Foetal cerebral redistribution     Goto   Sponge   NotDistinct   Permalink

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Foetal cerebral redistribution or 'brain-sparing' is a diagnosis in foetal medicine. It is characterised by preferential flow of blood towards the brain at the expense of the other vital organs, and it occurs as a haemodynamic adaptation in foetuses which have placental insufficiency. The underlying mechanism is thought to be vasodilation of the cerebral arteries. Cerebral redistribution is defined by the presence of a low middle cerebral artery pulsatility index (MCA-PI). Ultrasound of the middle cerebral artery to examine the Doppler waveform is used to establish this. Although cerebral redistribution represents an effort to preserve brain development in the face of hypoxic stress, it is nonetheless associated with adverse neurodevelopmental outcome. The presence of cerebral redistribut