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Table 1 The transition of the ICV flow pattern and time of detecting IVH in case 1

From: Reversal of blood flow in deep cerebral vein in preterm intraventricular hemorrhage: two case reports

(a) Case 1

times after birth

10 hours

31 hours

43 hours

66 hours

90 hours

Day 7

 

ICV flow pattern

Grade 0 (Fig. 1a)

Grade 3 (Fig. 1b)

PRF (Fig. 1c)

PRF

PRF (Fig. 1d)

Grade 1

 

IVH

 

Left Grade III

Right Grade III

    

(b) Case 2

times after birth

5 hours

25 hours

41 hours

60 hours

87 hours

106 hours

Day 5

ICV flow pattern

Grade 0 (Fig. 2a)

Grade 3

Grade 3 (Fig. 2b)

Grade 3

PRF (Fig. 2c)

Grade 2

Grade 1

IVH

  

Right Grade I

 

Bilateral Grade III

  
  1. Abbreviations: ICV internal cerebral vein, IVH intraventricular hemorrhage
  2. ICV flow pattern: Grade 0, continuous flat flow; Grade 1, a mild pulsatile flow (minimum speed/maximum speed ≧ 0.5); Grade 2, severe pulsatile flow (minimum speed/maximum speed < 0.5); Grade 3, a partially interrupted flow (minimum speed = 0 cm/s); PRF, a partially reversed ICV blood flow