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Table 2 Doppler parameters of umbilical artery thrombosis (UAT) with stillbirth

From: Hemodynamic changes and perinatal outcome associated with umbilical artery thrombosis: a retrospective study

Case

GA at diagnosis of UAT (weeks)

GA at end of pregnancy (weeks)

Time between GA at diagnosis and termination of pregnancy (days)

UA-PI

UA-RI

MCA-PI

CPR

DV-PIV

UtA-PI

1

244/7

253/7

5

1.25

0.77

0.85a

0.68a

1.10c

0.74

2

232/7

24

4

1.11

0.69

0.95 a

0.91 a

1.29 c

0.88

3

265/7

281/7

8

0.73 a

0.54 a

1.38 a

1.89 b

1.14 c

0.56

4

225/7

234/7

5

0.78 a

0.56 a

0.89 a

1.14 a

1.15 c

0.45

5

27

272/7

2

0.83b

0.59 b

0.69 a

0.84 a

0.89 c

0.58

6

241/7

242/7

1

0.93 b

0.63 b

1.10 a

1.18 a

1.10 c

0.47

7

24

242/7

2

1.01 b

0.67 b

0.81 a

0.80 a

1.16 c

0.75

  1. UA, umbilical artery; PI, pulsatility indices; RI, resistance indices; MCA, middle cerebral artery; CPR, cerebroplacental doppler ratio; DV, ductus venosus; PIV, pulsatility index for veins; UtA, uterine artery
  2. a,<5th centile; b, 5th -50th centile; c, >95th centile