Active clinical trials for "Premature Birth"

OBJECTIVE. Neonatologists consider early feeding at the breast to be too tiring for preterm infants, although there is no evidence that this is actually the case. It is also not known whether the method of feeding affects energy expenditure. We hypothesized that resting energy expenditure (REE) would be higher after breastfeeding than after bottle feeding. PATIENTS AND METHODS. preterm ( >32 weeks GA) stable infants who are nourished entirely by their mothers' breast milk will be studied when fed expressed breast milk either by bottle or at the breast. REE will be measured for 20 minutes after feeding. Breast milk quantity is evaluated by pre- and post feeding weighing.

The purpose of this study is to determine what factors influence the visual outcomes of infants with severe retinopathy of prematurity (ROP) and to monitor the outcomes.

An epidemiologic study of pregnant women in western Washington to measure the relationships between exposure to air pollutants and risks of preeclampsia and preterm delivery.

Premature infants stand a risk of danger to the layer of the eye that creates sight that, if untreated, can cause severe vision problems, leading to blindness in some cases. This research study will use ultrasound to examine the eye for retinal changes of prematurity.

Pregnant women with iron deficiency anemia during third trimester will be assessed for serum ferritin and peak systolic value for fetal middle cerebral artery to find out their correlation with preterm delivery.

Premature ejaculation (PE) has been known as one of the most common male sexual dysfunction. Until now dapoxetine is the only approved medical treatment option and there is no second line therapy in case of no-response or refuse to dapoxetine, a comprehensive evaluation of the factors that lead to dropout is needed especially in a real-practice setting. With this background, investigators are going to assesse the discontinuation rate of dapoxetine treatment in patients with PE and the reasons for discontinuation in a clinical setting throughout a follow-up period of 2 years.

Nowadays feeding intolerance (FI) is a common condition among preterm infants. It has been estimated that 16%-29% of premature infants admitted to neonatal intensive care units (NICUs) develop feeding intolerance at some point during their length of stay. The most frequent signs of FI are the presence of abdominal distension, abundant and/or bilious gastric residuals and vomiting suggesting an inability of the infant to further tolerate enteral nutrition, it increases with decreasing in gestational age (GA) and birth weight (BW). FI represents one of the most uncontrollable variables in the early nutritional management of these infants, and may lead to suboptimal nutrition, delayed attainment of full enteral feeding and prolonged parenteral nutrition supply. NIRS has been used in preterm infants to evaluate changes in cerebral perfusion and oxygenation. It provides real time insight into the oxygen delivery, presented as regional oxygen saturation rSO2 with lower values than SpO2 distal pulse-oximetry where is mostly measured as arterialized capillary bed (around 55% vs 98% Oxygen saturation in regional NIRS vs conventional pulse-oximetry). Light easily penetrates the thin tissues of the neonate through bone and soft tissue, particularly the thin capillary bed of the tissues; NIRS provides non-invasive, continuous information on tissue perfusion and oxygen dynamics. This technique uses principles of optical spectrophotometry that make use of the fact that biological material, including the skull, is relatively transparent in the NIR range. Dave et al. evaluated the abdominal tissue oxygenation with NIRS, and showed that preterm infants change their cerebral - splanchnic oxygenation ratios during feedings, mainly because an increasing in the splanchnic oxygenation. Gay et al. performed abdominal NIRS in premature piglets showing association of perfusion/oxygen changes with NEC spectrum. The investigators would like to evaluate the association between feeding intolerance and unchanged splanchnic regional saturation and variation in the cerebral splanchnic ratio. Innovation: FI diagnosis follows a subjective approach, where the clinician is worried in further risk of develop Necrotizing enterocolitis (NEC). This non-studied relationship (FI and NEC) lower the threshold for the diagnosis of FI. Furthermore, infants with FI diagnosis commonly are subject of stop or slow the progression of feedings, increasing the risk of intestinal villi atrophy, and increase the length of parenteral nutrition support, and also the length of stay in the NICU settings. If NIRS technology help the clinicians to detect true abnormalities objectively as a new monitor assessing adequate feeds progress decreasing failure to feed, and therefore diminishing the need for parenteral feeds and further complication associated with it.

In this project, the investigators will study a cohort of preterm infants, together with their parents, during NICU hospitalization and follow their developmental trajectory until the age of two. An important first scientific goal of the project is to identify objective stress markers that can be obtained easily and non-invasively in preterm infants during NICU hospitalization. This will include the development of novel techniques to measure stress related heart rate variability (HRV) and EEG maturation, as well as sleep stage markers for preterm infants. Secondly, the investigators will study the emotional and bonding processes in parents of preterm infants. Parental distress in terms of depressive symptoms, anxiety, perceived stress and parent-infant bonding will be measured at multiple measuring points. This will enable the validation of psychometric instruments in the specific population of parents of preterm infants. Also, the investigators can investigate the effect and predictive value of the course of parental depression, anxiety and stress scores on child's developmental outcome and on parent-infant bonding and attachment. Thirdly, studies on epigenetic changes due to prenatal stress are still scarce in humans. In this study, the investigators will include a cohort of mothers experiencing profound prenatal stress due to preterm labor, which will complement the earlier work that has been carried out in a low-risk population. The investigators expect more profound changes in methylation state of the NR3C1 and other promotor regions in their cohort of mothers exposed to important prenatal stress. Secondly, the methylation of oxytocin receptor regions will be studied in relation to attachment and bonding. An important overall goal of the project is to develop a Perinatal Stress Calculator that studies the value of the different neonatal, endocrinological, psychological and physiological stress-related parameters to predict differences in psychomotor, cognitive, behavioral, and emotional development. This longitudinal study design will enable the investigators to use the perinatal stress calculator to study the relation between the perinatal stress parameters and later developmental disabilities such as motor impairment, cognitive deficits, language delay but also social and behavioral problems such as attentional deficits and emotional self-regulation dysfunction.

Particular attention is paid to thermal management of preterm neonates in neonatal intensive care units because of the major risk of morbidity associated with hypothermia. Percutaneous central venous catheter placement is essential to ensure adequate caloric intake and intravenous administration of treatments, but this procedure can cause major body temperature variations, responsible for complications in these neonates, as convection incubator function is impaired during opening of the incubator, which can be prolonged (30 minutes to 2 hours) depending on the technical difficulties encountered during catheter placement. In parallel, the use of a polyethylene bag or sheet in the delivery room and for neonatal transport is now clearly defined and ensures stability or even a considerable temperature gain during transfer immediately after birth. In the light of several clinical cases, the use of a polyethylene bag during central venous catheter placement appears to be effective to prevent body temperature loss in preterm neonates. No data are currently available concerning the value of this method of prevention of hypothermia during this type of procedure. Preliminary studies conducted by our team on a dummy suggest that a polyethylene bag or sheet could be useful during this procedure by significantly reducing heat loss caused by convection and evaporation. However, compensation phenomena such as generalized vasoconstriction to cold in preterm infants are very poorly described, but can induce a functional conflict between mechanisms ensuring maintenance of homeostasis and those involved in maintenance of blood pressure.

The purpose of this study is to determine whether saturation control by parents in children younger than 32 weeks or under 1500 g versus conventional care performed by nursing increases the time in which these patients remain at optimal saturation range. If the hypothesis of this study is confirmed premature infants could prevent episodes of hypoxia-hyperoxia and also give more relevance to the role of parents in caring for their children admitted in a neonatal intensive care unit.