Table 6: Mean and SD of central blood flow values using the methodology as described by Evans and Kluckow [7, 8].

3–9 hours 24 hours day 2 day 7–14 RVO (sagittal view)  Preterm 260 (90) 270 (90) 430 (100)  Term 255 (60) LVO (ascending aorta)  Preterm 240 (60) 260 (60) 400 (75)  Term 220 (60) SVC flow  Preterm 60 (25) 80 (20) 90 (25) 90 (30)  Term 75 (25) 95 (30) 100 (30)