Correlation between uteroplacental three-dimensional power Doppler indices and true uterine blood flow: evaluation in a pregnant sheep model

2010 ◽  
Vol 36 (5) ◽  
pp. 635-640 ◽  
Author(s):  
O. Morel ◽  
F. Pachy ◽  
P. Chavatte-Palmer ◽  
M. Bonneau ◽  
E. Gayat ◽  
...  
Keyword(s):  
Blood Flow ◽  
Power Doppler ◽  
Three Dimensional ◽  
Uterine Blood Flow ◽  
Sheep Model ◽  
Pregnant Sheep ◽  
Doppler Indices ◽  
Blood Flow Evaluation

scholarly journals P14.20: Impact of machine settings on 3DPD utero-placental indices in a pregnant sheep model with controlled uterine blood flow

2014 ◽  
Vol 44 (S1) ◽  
pp. 266-266
Author(s):  
O. Morel ◽  
J. Duan ◽  
E. Perdriolle-Galet ◽  
V. Tsatsaris ◽  
P. Chavatte-Palmer
Keyword(s):  
Blood Flow ◽  
Uterine Blood Flow ◽  
Sheep Model ◽  
Pregnant Sheep

Behavioral activity during prolonged hypoxemia in fetal sheep

1988 ◽  
Vol 65 (6) ◽  
pp. 2420-2426 ◽  
Author(s):  
A. D. Bocking ◽  
R. Gagnon ◽  
K. M. Milne ◽  
S. E. White
Keyword(s):  
Blood Flow ◽  
Eye Movements ◽  
Normal Incidence ◽  
Behavioral Activity ◽  
Uterine Blood Flow ◽  
Fetal Sheep ◽  
Pregnant Sheep ◽  
Fetal Breathing ◽  
Fetal Breathing Movements ◽  
Internal Iliac

Experiments were conducted in unanesthetized, chronically catheterized pregnant sheep to determine the fetal behavioral response to prolonged hypoxemia produced by restricting uterine blood flow. Uterine blood flow was reduced by adjusting a vascular occluder placed around the maternal common internal iliac artery to decrease fetal arterial O2 content from 6.1 +/- 0.3 to 4.1 +/- 0.3 ml/dl for 48 h. Associated with the decrease in fetal O2 content, there was a slight increase in fetal arterial PCO2 and decrease in pH, which were both transient. There was an initial inhibition of both fetal breathing movements and eye movements but no change in the pattern of electrocortical activity. After this initial inhibition there was a return to normal incidence of both fetal breathing movements and eye movements by 16 h of the prolonged hypoxemia. These studies indicate that the chronically catheterized sheep fetus is able to adapt behaviorally to a prolonged decrease in arterial O2 content secondary to the restriction of uterine blood flow.

scholarly journals Three-Dimensional Power Doppler Analysis of Cerebral Circulation in Normal and Growth-Restricted Fetuses

2009 ◽  
Vol 29 (9) ◽  
pp. 1609-1618 ◽  
Author(s):  
Jose L Bartha ◽  
Eva M Moya ◽  
Blas Hervías-Vivancos
Keyword(s):  
Doppler Ultrasound ◽  
Cerebral Circulation ◽  
Pulsatility Index ◽  
Power Doppler ◽  
Three Dimensional ◽  
Flow Index ◽  
Power Doppler Ultrasound ◽  
3D Power Doppler ◽  
Doppler Indices ◽  
Vascularization Index

The objective of the present study was to evaluate fetal cerebral circulation by using three-dimensional (3D) power Doppler ultrasound in normal and growth-restricted fetuses. A total of 100 normal grown fetuses were compared with other 25 with growth restriction (FGR). Three-dimensional power Doppler ultrasound was used to assess fetal cerebral 3D vascular indices: vascularization index, flow index (FI), and vascularization flow index (VFI). Both FI and VFI correlated positively with gestational age. On average, all the 3D vascular indices were increased in fetuses with FGR. The proportion of fetuses detected as having hemodynamic redistribution was higher when using 3D power Doppler indices than by means of the middle cerebral artery pulsatility index (52% versus 20%, P = 0.002). In conclusion, two of the three indices increased during gestation. All the fetal cerebral 3D vascular indices are increased in fetuses with FGR. In these fetuses, there were more cases suggesting hemodynamic redistribution than expected by conventional Doppler studies.

The Effects of S(+)-Ketamine and Racemic Ketamine on Uterine Blood Flow in Chronically Instrumented Pregnant Sheep

2004 ◽  
pp. 497-502 ◽  
Author(s):  
Danja Str??mper ◽  
Wiebke Gogarten ◽  
Marcel E. Durieux ◽  
Kristian Hartleb ◽  
Hugo Van Aken ◽  
...  
Keyword(s):  
Blood Flow ◽  
Uterine Blood Flow ◽  
Pregnant Sheep ◽  
Racemic Ketamine
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