Table 2.

Ultrasound (US) information collected at each assessment point

Cardiac US	Head US
Ductus arteriosus parameters Size, flow pattern Diastolic flow in descending aorta (retrograde/absent/antegrade) Left pulmonary artery diastolic velocity	Intraventricular haemorrhage Presence or absence Grade if present
Systemic blood flow measurements Left ventricular output Right ventricular output Superior vena cava blood flow	Other pathology Other intracranial bleeding Periventricular leukomalacia