Comparison of the minimum of the 5 and 12 hour middle cerebral artery (MCA) Doppler velocity and superior vena cava (SVC) flow and the maximum MCA pulsatility index between babies with no intraventricular haemorrhage (IVH) and babies who developed an IVH after the initial scan
| No IVH (n=94) | Late grade 1 to 4 IVH (n=17) | p Value | p Value: controlling for gestation | |
|---|---|---|---|---|
| Data are medians and range. | ||||
| MCA mean velocity (m/s) | 0.11 (0.02–0.29) | 0.095 (0.03–0.16) | 0.18 | |
| MCA pulsatility index | 1.84 (0.77–12.3) | 1.96 (1.33–4.28) | 0.78 | |
| Estimated MCA diameter (mm) | 1.3 (0.9–2.0) | 1.1 (1.0–1.5) | 0.006 | 0.116 |
| Lowest average 6 hour MBP (mm Hg) | 28 (17–42) | 25 (15–34) | 0.003 | 0.195 |
| SVC flow (ml/kg/min) | 49 (7–105) | 28 (10–55) | <0.0001 | <0.0001 |