Active clinical trials for "Pre-Eclampsia"

Formation of neutrophil extracellular traps (NETs) is a process of activation of neutrophils, which then generate filaments containing DNA, enzymes and extracellular histones. Two mechanisms of formation of NETs are described in the literature: vital mechanism via Toll Like Receptors (TLRs) and suicidal mechanism, dependent on the reactive oxygen species (ROS) pathway. The description of these two mechanisms of formation of NETs is recent and no data exist in the context of pregnancy.

In view of both endothelial injury in pre-eclampsia, high blood pressure and kidney impairment characteristics, a recent study demonstrated that the serum levels of NGAL increased at the end of the second trimester in women who subsequently developed pre-eclampsia compared to the control group. This correlates well with the endothelial damage that occurs during pre-eclampsia and thus NGAL can be considered as a promising marker in predicting both early and late onset pre-eclampsia. It may be required to combine one or more biomarker with NGAL to increase the precision, and sensitivity for detection of risk and reliability of using biomarkers for pre-eclampsia.

The aim of the study is to validate in a prospective fashion the value of the Congo-Red Dot (CRD) test for diagnosis of preeclampsia. The working hypothesis is that in pregnancies complicated by preeclampsia, will display urine congophilia and have a positive CRD test.

Postpartum hemorrhage is an important cause of maternal morbidity and mortality. In patients with severe preeclampsia there is an increased risk of postpartum hemorrhage but the hemodynamic changes associated with this pathology make the management of any kind of bleeding particularly troublesome. There are many pharmacological options, being oxytocin the first line of treatment. However there is no evidence about the safety and efficacy of carbetocin, an oxytocin agonist. The investigators aimed to compare oxytocin with carbetocin for the routine prevention of postpartum hemorrhage in patients with severe preeclampsia.

Background: Preeclampsia is a combination of high blood pressure and other potentially life-threatening symptoms. Preeclampsia occurs in up to 10% of pregnancies and is a main cause of maternal and fetal death worldwide. Treatment is often difficult, and so far there is no specific and effective therapy. Researchers have been studying the body systems that regulate blood pressure. They have also studied drugs that can control certain blood chemicals that constrict blood vessels and increase blood pressure. DIGIBIND, a drug that lowers blood pressure, has been used to treat pre-eclampsia. Marinobufagenin (MBG), a chemical in the blood that constricts blood vessels, has been shown to be involved in pre-eclampsia. But researchers are still not certain whether DIGIBIND can be used to specifically target MBG. Researchers want to find out whether DIGIBIND acts against MBG specifically. This information may help them to develop better drugs to block MBG and lower blood pressure in women with preeclampsia. Objectives: - To study whether the blood pressure treatment drug DIGIBIND specifically acts on marinobufagenin levels in the blood of pregnant women. Eligibility: - Women between 18 and 50 years of age who are 34 to 39 weeks pregnant and have preeclampsia. Design: Participants will be screened with a physical examination, medical history, and blood and urine tests. Before delivery, participants will provide blood samples for testing and evaluation. Following delivery, participants will provide additional blood samples and samples of the placenta for testing and evaluation. No additional treatment, apart from the standard of care, will be provided as part of this protocol.

Hypertensive disorders of pregnancy are a major cause of maternal mortality and morbidity, especially in developing countries. Postpartum hypertension can be related to persistence of gestational hypertension, preeclampsia, or preexisting chronic hypertension, or it could develop de novo secondary to other causes. The available data in the medical literature have primarily focused on antenatal and peripartum management. There are few data regarding the evaluation in women who are diagnosis with postpartum hypertension. Some medications that cause vasoconstriction are often used for pain relief, in women having perineal lacerations, episiotomy, or cesarean delivery. Such women usually require large doses of nonsteroidal antiinflammatory drugs that are associated with vasoconstriction and sodium and water retention, this drugs can result in severe hypertension. The purpose of this study is to evaluate maternal postpartum hypertension in women with severe preeclampsia treated with nonsteroidal antiinflammatory drugs or acetaminophen.

The purpose of the study is to help make a lower cost automatic blood pressure monitor device for diagnosis and monitoring of pre-eclampsia in pregnant women, where automatic blood pressure monitoring is limited or not available. The study will compare this low cost device to a commercially available system used for pre-eclamptic women in many United States hospitals that the investigators will be bringing to Malawi as a part of this study. The team hopes to show that this lower cost blood pressure machine works well and can help women with pre-eclampsia. The study also aims to see if this machine is easy for the nurse to use. 70 pregnant women who are either at-risk or diagnosed with pre-eclampsia will be enrolled at University of Texas Health Science Center Houston. Patient arm circumference will be measured with measurement tape. They will be seated upright in a comfortable chair with arm at heart level and an arm blood pressure cuff from either the automatic blood pressure monitor or a manual sphygmomanometer will be placed on the left arm. The cuff will be inflated and then deflated until measurement concludes. Heart rate will be measured with tactile arterial palpation.The process will be repeated for a total of up to nine measurements, alternating between measurements with the automatic blood pressure monitor and the manual sphygmomanometer. There will be a waiting period of 45-60 seconds between each measurement. The results of this study will help researchers understand the performance and usability of this device in Malawi and help decide if any design changes are needed.

Preeclampsia may have several causes leading to different characteristics of the pathology. Differentiation between the "type of preeclampsia" would help to treat patients more accurately. This project aims to identify early markers that are specific to each type of preeclampsia (early or late, with or without growth restriction). Through a case-control study, many data will be collected prospectively (serum markers, ultrasonographic markers, maternal factors) among nulliparous women with no sign of preeclampsia (as soon as the first trimester) and nulliparous women with preeclampsia (at diagnosis).

The research team has developed an automatic blood pressure monitor (Sphygmo) to be used for the monitoring and diagnosis of pre-eclampsia in pregnant women, particularly in low-resource settings where current monitoring is limited. 90 adult volunteers will be enrolled by researchers at Rice University. The participant will be seated in a comfortable chair with arm at heart level. Arm circumference will be measured and a blood pressure cuff will be placed on the arm. The cuff will be inflated and blood pressure measurements will be taken by a commercially available device and by the Sphygmo device. Blood pressure measurements from both devices will be recorded. The participant's blood pressure will be measured up to 9 times with a waiting period of 45-60 seconds between each measurement. The results of this study will be used to optimize the blood pressure detection algorithm and thus further develop the device.

The aim of this study is to explore a mechanism that could potentially explain why women with a pregnancy complicated by pre-eclampsia are described as having an increased risk of cardiovascular disease later in life. If the hypothesis of this study turns out to be true, that is to say that women with pre-eclampsia have a higher level of oxidative stress than women with a normal pregnancy and that this difference persists after the delivery (6 months), a controlled randomized interventional study aiming to evaluate either therapeutic supplementation with antioxidant vitamins (Vit C and E) or modifications in diet could be envisaged.