Assessment ofMaternal and FetalVascular Changes inNormotensive andPre-Eclamptic Patients and Its Impact on Pregnancy Outcome.
试验速览
- 阶段
- 不适用
- 入组人数
- 100
- 试验地点
- 1
- 主要终点
- Vascular changes by Doppler imaging
研究概览
简要总结
Normal pregnancy is associated with vasodilation and decreased peripheral resistance, which is detected as early as 5 weeks' gestation .
Pre-eclampsia is a multi-system disorder of the second half of pregnancy , which is characterized by increased vascular reactivity and peripheral resistance with pathological changes that are consistent with impaired blood flow to the affected vascular beds. Investigators will evaluate fetal and maternal vascular changes in normotensive and pre-eclamptic patients by Ultrasound and Doppler and their impact on prediction of pregnancy outcome.
详细描述
Pre-eclampsia affects 2-8% of all pregnancies, although treatment is generally effective. However, 10-15% of direct maternal deaths are associated with Pre-eclampsia and eclampsia(WHO, 2011). There is a considerable evidence that generalized endothelial dysfunction underlies the clinical manifestations of the disease (Oladipupo et al., 2014).
It has been demonstrated that peripheral nutritive blood flow is impaired in pregnancies complicated by pre-eclampsia and precedes onset of the disorder (Kenny et al., 2014).
The pathophysiological mechanism is characterized by a failure of the trophoblastic invasion of the spiral arteries which may be associated with an increased vascular resistance of the uterine artery and a decreased perfusion of placenta. (Al-Jameil et al ; 2014 ) Ultrasound of the brachial artery, and Doppler ultrasound of the carotid artery and uterine artery are propaedeutic , non-invasive methods that contribute to the understanding of the pathophysiology of PE and Eclampsia (Takata et al., 2002 ).
Doppler assessment of the placental circulation plays an important role in screening for impaired placentation and its complications of preeclampsia, intrauterine growth restriction and perinatal death. Assessment of the fetal circulation is essential in the better understanding of the pathophysiology of a wide range of pathological pregnancies and their clinical management(Ghidini & Vergani, 2012).
研究设计
- 研究类型
- Observational
- 观察模型
- Case Control
- 时间视角
- Prospective
入排标准
- 年龄范围
- 20 Years 至 40 Years（Adult）
- 性别
- Female
- 接受健康志愿者
- 否
入选标准
- •All women will be :
- •Nonsmokers,
- •Nondiabetic,
- •With no family history of vascular diseases.
- •Gestational age at enrolment >28 and <34 weeks of gestation.
- •Singleton pregnancy.
- •Informed consent.
- •50 Normotensive pregnant women without complications will be defined as controls.
- •50 Pre-eclamptic patients.
排除标准
- •Patients who presented to labor and delivery were excluded as subjects.
- •Growth-restricted fetus due to:
- •marginal insertion of the umbilical cord,
- •placental infarction,
- •fetal minor heart anomaly,
- •Fetal viral infection.
- •Refusal of patient to participate in the study.
- •Multiple gestations.
- •Autoimmune diseases
- •Previous history of PE or IUGR.
结局指标
主要结局
Vascular changes by Doppler imaging
时间窗: >28-<34 weeks
Doppler imaging will be undertaken for assessing fetal umbilical, middle cerebral arteries in addition to ductus venosus. Concerning maternal vessel assessment, Doppler will be done for uterine arteries, common carotid and brachial arteries.
次要结局
- Pregnancy outcome(Date of delivery and within 40 days after delivery)
研究者
Nesreen Abdel Fattah Abdullah Shehata
Assistant professor of Obstetrics and Gynecology
Beni-Suef University