Utero-placental Vascularisation in Normal and Preeclamptic and Intra-uterine Growth Restriction Pregnancies

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

UNKNOWN

Clinical Phase

NA

Total Enrollment

112 participants

Study Classification

INTERVENTIONAL

Study Start Date

2013-12-31

Brief Summary

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Introduction

Preeclampsia (PE) and intra-uterine growth restriction (IUGR) are two major pregnancy complications related to chronic utero-placental hypoperfusion. Three-dimensional power Doppler (3DPD) angiography has been used for the evaluation of utero-placental vascularisation and three vascular indices have been calculated: the vascularisation index (VI), flow index (FI) and vascularisation-FI (VFI). However, several technical endpoints hinder the clinical use of 3DPD as physical characteristics and machine settings may affect 3DPD indices, and so its clinical significance is not yet clear.

Objectives

The primary objective is to better understand the clinical significance of 3DPD indices by evaluating the relationship between these indices and placental morphometry. Secondary objectives are (i) to determine the impact of machine settings and physical characteristics on 3DPD indices, and (ii) to evaluate physio-pathological placental vascularisation patterns.

Methods and analysis

This is a prospective controlled study. We expect to include 112 women: 84 with normal pregnancies and 28 with PE and/or IUGR (based on our former cohort study on 3DPD indices for PE and/or IUGR prediction (unpublished data)). Within 72 h before planned or semi-urgent caesarean section, utero-placental 3DPD images with five different machine settings will be acquired. Placentas will be collected and examined after surgery and stereological indices (volume density, surface density, length density) calculated. The 3DPD indices (VI, FI and VFI) of the placenta and adjacent myometrium will be calculated. Correlation between Doppler and morphological indices will be evaluated by Pearson or Spearman tests. Agreement between 3DPD indices and morphological indices will be assessed by Bland and Altman plots. The impact of Doppler settings and maternal characteristics on 3DPD indices will be evaluated with a multivariate linear regression model.

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Detailed Description

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Conditions

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Preeclampsia Intra-uterine Growth Restriction

Study Design

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Allocation Method

NON_RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

BASIC_SCIENCE

Blinding Strategy

NONE

Study Groups

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pathological group

pregnant women with preeclampsia and/or IUGR pregnancy with a planned or semi-urgent caesarean section or vaginal delivery will be recruited into this study.

Group Type OTHER

Doppler

Intervention Type DEVICE

acquisition of 3D power Doppler of uteroplacental vascularization unit in 72h before delivery and morphological analysis for placenta

physiological group

pregnant women with normal pregnancy with a planned caesarean section or vaginal delivery will be recruited into this study

Group Type OTHER

Doppler

Intervention Type DEVICE

acquisition of 3D power Doppler of uteroplacental vascularization unit in 72h before delivery and morphological analysis for placenta

Interventions

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Doppler

acquisition of 3D power Doppler of uteroplacental vascularization unit in 72h before delivery and morphological analysis for placenta

Intervention Type DEVICE

Eligibility Criteria

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Inclusion Criteria

* Age ≥18 years and ≤65 years Fetal anomalies
* Gestational age ≥30 gestational weeks
* With social insurance
* With written consent for participation
* With medical examination

* Hospitalised pregnant women with scheduled or semi-urgent caesarean section according to national HAS recommendations or Hospitalised pregnant women with scheduled vaginal delivery.
* Normal pregnancy issues
* Normal fetal morphology

* Pregnant women with preeclampsia and/or IUGR pregnancy
* Hospitalised pregnant women with scheduled or semi-urgent caesarean section or hospitalised pregnant women with scheduled vaginal delivery.

Exclusion Criteria

* Fetal morphological abnormalities that may influence fetal circulation
* Maternal or fetal vital urgency
* Multiple pregnancy
* Non-placental origin IUGR
* Language barrier
* Patient under legal protection

Minimum Eligible Age

18 Years

Maximum Eligible Age

65 Years

Eligible Sex

FEMALE

Accepts Healthy Volunteers

Yes