Assessment of placental blood flow between 22 and 34 weeks of gestation by 3D-sonography power Doppler vascular indices.
Summary of "Assessment of placental blood flow between 22 and 34 weeks of gestation by 3D-sonography power Doppler vascular indices."
PURPOSE:
To analyze and compare the vascular flow in different parts of the placenta of normal pregnant women between 22 and 34 weeks of gestation through three-dimensional power Doppler ultrasonography (3D power Doppler) vascular indices.
METHODS:
This is a cross-sectional study involving 55 normal pregnant women with gestational ages between 22 and 34 weeks. The vascularization index (VI), flow index (FI) and vascularization flow index (VFI) were obtained using the virtual organ computer-aided analysis (VOCAL) method both in the region of placental cord insertion and the peripheral region of the placenta. The Wilcoxon test was applied, adopting a significance level of 5% to evaluate possible differences in these indices between study areas.
RESULTS:
For the three indices examined (VI, FI and VFI), a statistically significant difference was obtained between the insertion of the umbilical cord, designated as the center, and the placental periphery on both the right (p < 0.001 for VI, p = 0.001 for FI and p < 0.001 for VFI) and the left (p < 0.001 for VI, p < 0.001 for FI and p = 0.001 for VFI), taken as the average of the rates obtained in the two peripheries (p < 0.001 for VI, p < 0.001 for FI and p = 0.003 for VFI). Differences were not found when the two peripheral areas were compared or if placenta was anterior or posterior (p > 0.05).
CONCLUSION:
There is a statistically significant difference between the vascular indices obtained with a 3D power Doppler at different points of the placenta.
Affiliation
Department of Obstetrics and Gynecology, Medical Science College of Santa Casa of São Paulo (FCMSCSP), São Paulo, SP, Brazil.
Journal Details
This article was published in the following journal.
Name: Archives of gynecology and obstetrics
ISSN: 1432-0711
Pages:
Links
- PubMed Source: http://www.ncbi.nlm.nih.gov/pubmed/20652283
- DOI: http://dx.doi.org/10.1007/s00404-010-1595-x
Medical and Biotech [MESH] Definitions
Placental Function Tests
Methods used for the assessment of placental function.
Fetal Mortality
Number of fetal deaths with stated or presumed gestation of 20 weeks or more in a given population. Late fetal mortality is death after of 28 weeks or more.
Hypertension, Pregnancy-induced
A condition in pregnant women with elevated systolic (>140 mm Hg) and diastolic (>90 mm Hg) blood pressure on at least two occasions 6 h apart. HYPERTENSION complicates 8-10% of all pregnancies, generally after 20 weeks of gestation. Gestational hypertension can be divided into several broad categories according to the complexity and associated symptoms, such as EDEMA; PROTEINURIA; SEIZURES; abnormalities in BLOOD COAGULATION and liver functions.
Maternal-fetal Exchange
Exchange of substances between the maternal blood and the fetal blood at the PLACENTA via PLACENTAL CIRCULATION. The placental barrier excludes microbial or viral transmission.
Renal Plasma Flow
The amount of PLASMA that perfuses the KIDNEYS per unit time, approximately 10% greater than effective renal plasma flow (RENAL PLASMA FLOW, EFFECTIVE). It should be differentiated from the RENAL BLOOD FLOW; (RBF), which refers to the total volume of BLOOD flowing through the renal vasculature, while the renal plasma flow refers to the rate of plasma flow (RPF).
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