Pharmacokinetics (PK) and Modeling of Betamethasone Therapy in Threatened Preterm Birth
Premature LaborRespiratory distress syndrome (RDS) is a life-threatening condition for premature neonates. Antenatal glucocorticoids have been used clinically in women with threatened preterm birth to accelerate lung maturation for more than 40 years. The current treatment strategy for women with threatened preterm delivery is for a standard, "one size fits all" dosing with either betamethasone (BMZ) or dexamethasone. It is well known that pregnancy introduces additional variability in response to medication therapy with different physiological changes and alterations in the activity of drug metabolizing enzymes. The objective of this project is to evaluate the pharmacokinetic (PK), pharmacodynamic, and pharmacogenetic parameters of betamethasone (BMZ) and determine the differences in response and benefit in pregnancy. An individualized dosing approach to medications in pregnancy, such as BMZ, is crucial to optimize efficacy of this important medication.
Non-Invasive Detection of Tissue Oxygen Deprivation in Premature Infants With Patent Ductus Arteriosus....
Premature InfantPatent Ductus Arteriosus1 moreThe proposed research evaluates tissue oxygenation (StO2) as measured by resonance raman spectroscopy (RRS) in premature infants with and without patent ductus arteriosus (PDA). This is a prospective observational study of infants born at < 30 weeks of gestation. The primary aim of this study is to determine if the difference in pre- and post-ductal StO2 as detected by RRS is more significant in premature infants with PDA in comparison to infants without PDA. The secondary aim of this study is to determine if the difference in pre- and post-ductal StO2 as detected by RRS is more significant in infant who develop serious adverse events.
Effect of Feedings on Caffeine in Premature Infants
Apnea of PrematurityPremature Newborn1 moreAlmost all infants born <29 weeks gestational age develop apnea of prematurity and are treated with caffeine. Type of diet and disease states may be significant contributors of variability in caffeine metabolism and pharmacokinetics (PK) in this population. This prospective, observational, open-label, opportunistic PK study will compare the population PK of caffeine between infants fed formula and infants fed exclusively breast milk; compare the activities of caffeine metabolizing enzymes between infants fed formula and infants fed exclusively breast milk; and determine the effect of hypoxia, hypotension, and infection on caffeine PK and metabolism in premature infants.
Skin-to-skin Contact to Promote Bacterial Decolonization in Preterm Infants
PREMATURITYBACKGROUND Decolonization with topical antibiotics is necessary to prevent and / or control outbreaks of multidrug-resistant bacterial infection in the NICU (Neonatal Intensive Care Unit), but can trigger bacterial resistance. The objective of this study was to determine whether skin-to-skin contact of newborns colonized with MRSA (Methicillin-Oxacillin Resistant Staphylococcus Aureus) with their mothers could be an effective alternative for biological control of bacterial colonization. METHODS: The investigators studied 102 newborns admitted to NICU in three public hospitals in São Luís, Brazil. Inclusion criteria were birth weight from 1300 to 1800g, length of stay >4 days, newborns colonized by Staphylococcus aureus and/or Staphylococcus coagulase-negative methicillin-oxacillin resistant and mothers not colonized by these bacteria. Randomization was performed using a computer generated random numbers algorithm. Allocation to intervention and control groups was performed for each eligible newborn using a sealed opaque envelope. In the intervention group (n = 53) mother-infant skin-to-skin contact was held twice a day. The control group (n = 49) received routine care without skin-to-skin contact. There was no masking of newborn's mothers or researchers, but the individuals who carried out bacterial cultures and assessed results were kept blind to group allocation. The primary outcome was decolonization of newborns' nostrils after 7 days of intervention. Safety was assessed by monitoring vital signs of newborns during the intervention. The secondary outcome was emergence of late onset presumed sepsis until the end of hospitalization period or 28 days of life, whatever happened first. FUNDING: CNPq (Brazilian Research Council) and FAPEMA (Maranhão Research Foundation)
Common Neonatal Procedures Could Affect the aEEG in <30 Weeks of Gestational Age Preterms
Regional Blood FlowPremature Birth1 moreVery low birth weight infants has increased dramatically their survival. Survival without neurologic disturbance varies a lot between centers.There is evidence that fluctuations in cerebral blood flow influences the appearance of intraventricular hemorrhage and itself implies a detrimental neurologic developing.The electroencephalography is the result of electric base membrane activity on rest, and it's influenced by the blood flow either. The Amplitude-integrated electroencephalography is a novel tool, that is capable to be continuously used at the patient bed and is easily to be read by the trained clinician.The hypothesis is that common procedures as Surfactant instilation, Indomethacin and Aminophyline infusion as the appearance of apneas alters the aEEG register. It is a prospective study that tries to recruit 10 < 30 weeks of gestational age with aprofen consent to monitorize the aEEG since birth to the seventh day of live.
The Biomarker Study
Preterm BirthPreterm LaborPreterm birth (PTB) is a leading contributor to perinatal morbidity and mortality. While patients with preterm labor (PTL) are at an increased risk for PTB, not all PTL patients will deliver preterm. In patients with PTB, there is a high prevalence of 'intrauterine inflammation' as demonstrated by a large body of evidence. The presence of inflammation is noted by infiltration of inflammatory cells in the placenta and/or maternal fever in labor and/or elevation of cytokines in the amniotic fluid. Despite this significant association of inflammation with PTB, identification of women destined to deliver preterm by inflammatory markers in maternal blood has not been successful. To date, it has been difficult to determine which patients with PTL will experience PTB. Identification of biomarkers, such as high sensitivity C-Reactive Protein (hsCRP) as well as others such as sICAM, Pentraxin, sE-Selectin, and CxCL-10 in maternal serum and in placental cord blood, may help to serve three very important clinical aims. 1) Identification of novel biomarkers in maternal serum could help to distinguish those women with PTL who are most likely to deliver PTB. 2) These biomarkers may have a high negative predictive value and thus identify those women who are not likely to deliver preterm, avoiding undue hospital admission and medical therapies. 3) Select biomarkers in the mother and/or in cord blood may serve to identify those preterm neonates at greatest risk for adverse outcome. Through improved identification of these infants, studies with targeted therapies to reduce adverse neonatal outcomes in preterm neonates become feasible. This study involves a cohort assessment of women at risk for Preterm birth secondary to preterm labor, preterm premature rupture of membranes (PPROM), and cervical insufficiency (CI), between 22-0/7 and 33-6/7 weeks gestational age. We will obtain information regarding patients' pertinent past medical and obstetric history as well as small samples of maternal blood at up to four occasions, small samples of placental cord blood, a maternal saliva sample, and an infant buccal swab. We will follow each of these patient's pregnancy outcomes, and determine if there are any correlations between levels of certain biomarkers and latency to delivery as well as composite adverse neonatal outcomes. In women with PTB < 37 weeks, cord blood will be collected (as well as maternal saliva and an infant buccal swab) and biomarkers compared between those infants with and without specific adverse neonatal outcomes. Maternal saliva and buccal will be collected on all women and infants enrolled.
Wales Electronic Cohort for Children
MacrosomiaLow Birth Weight3 moreThe investigators are developing a research platform capable of improving children's health through the generation of knowledge from analysis of routinely collected data from within and outside the health service. The investigators are using the data that are routinely collected in Wales to answer specific questions about child health and well-being, with the aim of informing policy and practice in Wales, whilst also being internationally relevant. Routinely collected datasets are publicly funded, and have already been incorporated into the Secure Anonymised Information Linkage databank. The investigators are combining these datasets on children from health and social care to establish an anonymised Wales wide Electronic Cohort for Children (WECC). WECC will serve as the platform for future work in translating information into child population health policy. There are 35,000 births in Wales per year, and data are available for the previous ten years. Thus, WECC will be sufficiently powered to answer important social, economic and health policy questions. WECC will also act as a demonstration project which would inform the development of e-cohorts to support translational research across the life course and disease spectrum.
Va-Sense - Bacterial Vaginosis Once A Week Screening And Treatment To Reduce Infective Complications,...
Vaginal InfectionsBacterial Vaginosis3 moreThe purpose of this study is to determine whether screening of pregnant women with history of previous preterm delivery, once a week, for bacterial vaginosis using VA-SENSE, and treatment of positive women will reduce the risk of spontaneous preterm birth. We will compare between the effectiveness of once a week screening and once during pregnancy screening.
Thyroid Function in Late Preterm Infants
Transient HypothyroxinemiaTransient hypothyroxinemia (TH) is a condition characterized by low levels of serum thyroxine (T4) and normal levels of thyroid stimulating hormone (TSH). TH in premature infants has been found to be related to severity of illness. T4 levels in very low birth weight infants born prematurely has been found to be inversely correlated to severity of illness. In very low birth weight infants, TH has been associated with poor outcomes. Little is known about thyroid function in late preterm infants. Hypotheses: Ill late preterm infants will have lower total T4 levels than healthy late preterm infants. Total T4 and possibly TSH levels will be inversely correlated with short-term outcomes. Late Preterm infants born by cesarean section will have lower T4 levels compared to those born by vaginal birth.
Long-term Effect of The Mother Infant Transaction Program (MITP)
Premature BirthsThe purpose of this study is to investigate if a cost and time effective intervention in a previous RCT for preterm infants and their parents can reduce the parents experience of concern and stress, and improve the childrens development in various aspects at three years of corrected age. Hypothesis 1: The preterm born children of parents who were enrolled in the earlier RCT have a higher developmental level then preterm children of parents who received the usual treatment. Hypothesis 2: Parents who who were enrolled in the earlier RCT will have a lower level of stress and concern then parents who received treatment as usual.