DHA For The Improvement Of Neurodevelopmental Outcome In Preterm Infants: The DINO Trial
Funder
National Health and Medical Research Council
Funding Amount
$631,875.00
Summary
The incidence of neurological problems that occur in children born prematurely is higher than for those born at term. The earlier that a baby is born, the greater chance it has of having some developmental delay and general inability to cope at school. This has implications for the child, the families and the health system. One of the many dietary factors implicated in the development of neural abilities in premature infants is an omega-3 fatty acid called DHA. This compound is present in breast ....The incidence of neurological problems that occur in children born prematurely is higher than for those born at term. The earlier that a baby is born, the greater chance it has of having some developmental delay and general inability to cope at school. This has implications for the child, the families and the health system. One of the many dietary factors implicated in the development of neural abilities in premature infants is an omega-3 fatty acid called DHA. This compound is present in breast milk and most preterm formulas and is found in high concentrations in the brain and retina. In the last third of pregnancy the developing baby would normally accumulate DHA at a rapid rate. So it seems reasonable to assume that a baby outside the mother, that is born premature, would also need to accumulate DHA at this same rate. The problem is that none of the milks currently given to premature infants have DHA in high enough concentration to supply this amount of DHA to the baby. For example, breast milk and preterm formulas contain only a third of the DHA required. In order to provide this amount for the premature infant, breast milk containing DHA at about 1% of the total fat is required. Fortunately the level of DHA in breast milk can be increased to this level by supplementing the mothers diet with fish or olis like tuna oil. This study hopes to show that premature babies who receive DHA in amounts similar to that supplied in the womb will develop better than babies who receive low amounts of DHA.Read moreRead less
Which Oxygen Saturation Level Should We Use For Very Premature Infants? A Randomised Controlled Trial.
Funder
National Health and Medical Research Council
Funding Amount
$2,215,600.00
Summary
Retinopathy of prematurity (ROP) is a serious complication of premature birth, and is a major cause of preventable blindness. Babies who are born before 28 weeks gestation are at greatest risk for developing severe ROP. Oxygen is one of the most common therapies used daily to care for premature babies, but high oxygen levels are one of multiple factors that can disrupt normal eye development and contribute to ROP. The current dilemma is that doctors and nurses do not know what level of oxygenati ....Retinopathy of prematurity (ROP) is a serious complication of premature birth, and is a major cause of preventable blindness. Babies who are born before 28 weeks gestation are at greatest risk for developing severe ROP. Oxygen is one of the most common therapies used daily to care for premature babies, but high oxygen levels are one of multiple factors that can disrupt normal eye development and contribute to ROP. The current dilemma is that doctors and nurses do not know what level of oxygenation is both safe and most effective for these babies. Whilst higher oxygen levels may increase ROP and other respiratory problems, it is possible that lower oxygen levels may affect other long-term outcomes. Because there is no definitive evidence regarding appropriate oxygenation, a wide spectrum of opinion and practice currently exist. Australia is conducting The Benefits of Oxygen Saturation Targeting Trial (BOOST II), a research study to solve this dilemma. BOOST II is a randomised, double blind, clinical trial, which will study the effects of using two ranges of oxygen saturation, 85-89% versus a higher range 91-95% for infants born before 28 weeks gestation. Both of these oxygen level ranges are currently used in normal practice. Patient safety will be monitored closely, and each infant will have their development, vision and health assessed by specialists at 18-24 months of age (plus the number of weeks premature), to see whether there is difference in survival free of major disability between the two groups. 1200 Australian infants will participate. This study will answer important questions about the benefits and risks of higher versus lower oxygen levels, and will improve the care of thousands of Australian children and millions more worldwide.Read moreRead less
Efficacy And Safety Of Methylxanthines In Very Low Birth Weight Infants
Funder
National Health and Medical Research Council
Funding Amount
$221,136.00
Summary
With improving technologies and medications the numbers of very premature babies surviving to leave hospital has increased over the last two decades. However these babies are at increased risk of having brain damage in the form of mental retardation and cerebral palsy. These problems impose a major burden on the individuals, their families and society at large. This study attempts to identify whether or not a commonly used drug is safe in these babies or whether it contributes to brain damage in ....With improving technologies and medications the numbers of very premature babies surviving to leave hospital has increased over the last two decades. However these babies are at increased risk of having brain damage in the form of mental retardation and cerebral palsy. These problems impose a major burden on the individuals, their families and society at large. This study attempts to identify whether or not a commonly used drug is safe in these babies or whether it contributes to brain damage in some cases. Many premature babies have difficulty breathing by themselves because their brain does not send regular messages to their lungs telling them to expand. A class of drugs which includes caffeine has been shown to stimulate breathing in babies and has been thought to reduce the amount of support these babies require from a ventilator in the first weeks of life. The safety of these drugs has not been adequately demonstrated in premature babies and there is some evidence from animal studies that they may disrupt the developing brain. Results in human babies are inconclusive and concerns remain regarding the long term effects of caffeine. The question of whether caffeine usage increases the risk of mental retardation or cerebral palsy is a very important one given the almost universal usage of this or similar drugs in premature babies. We will find out whether babies given caffeine as newborns perform as well at 18 months of age as babies not given the drug.Read moreRead less
Novel Approaches To Assessing Cerebral Circulation And Oxygenation In Preterm Human Infants.
Funder
National Health and Medical Research Council
Funding Amount
$489,145.00
Summary
In the first few days after birth, some premature babies develop low blood pressure. It is thought that this meant that the amount of blood and oxygen going to the brain would also fall. If blood pressure became very low, this could injure the brain. Drugs are used to prevent low blood pressure, but their effect on blood flow and oxygen in the brain is uncertain. This study aims to develop simple cotside monitoring procedures that allow neonatologists to monitor oxygen supply and blood flow in t ....In the first few days after birth, some premature babies develop low blood pressure. It is thought that this meant that the amount of blood and oxygen going to the brain would also fall. If blood pressure became very low, this could injure the brain. Drugs are used to prevent low blood pressure, but their effect on blood flow and oxygen in the brain is uncertain. This study aims to develop simple cotside monitoring procedures that allow neonatologists to monitor oxygen supply and blood flow in the brain in tiny babies who weigh less than 1000gm, and what happens within the brain when drugs are given to raise blood pressure. We will employ a new instrument that generates low intensity near infrared light which passes safely into the brain and is absorbed according to the amount of oxygen present in very small blood vessels. As the methodology is new, we intend to first validate the measurement in immature lambs. The instrument will then be applied in studies of babies undergoing intensive care and at risk for low pressure and brain injury, as many as 5000 babies each year in Australia.Read moreRead less
Evaluating Neonatal Intensive Care For Tiny Babies In The 2000s - Is It Still Effective, Efficient And Available?
Funder
National Health and Medical Research Council
Funding Amount
$246,333.00
Summary
Most extremely tiny babies, those of birthweight less than 1000 g, need intensive care to survive. However some survivors have substantial problems with their long-term health. Since intensive care is costly we must be sure that it is money well spent. From the late 1970s until the late 1990s in the state of Victoria neonatal intensive care has been increasingly effective, with large increases in the long-term survival rate, from 25% in 1979-80, to 73% in 1997. Its efficiency has been relatively ....Most extremely tiny babies, those of birthweight less than 1000 g, need intensive care to survive. However some survivors have substantial problems with their long-term health. Since intensive care is costly we must be sure that it is money well spent. From the late 1970s until the late 1990s in the state of Victoria neonatal intensive care has been increasingly effective, with large increases in the long-term survival rate, from 25% in 1979-80, to 73% in 1997. Its efficiency has been relatively high and stable over time, comparing favorably with many other health care programmes, both intensive and non-intensive. It has been increasingly available, with fewer than 10% of ELBW infants born outside major hospitals with intensive care nurseries, and more tiny babies offered intensive care. We now need to know if these benefits have been maintained for tiny babies born in the 2000s. Hence we need to assess the long-term health of tiny babies born in Victoria in 2005.Read moreRead less
Previous research has shown that SIDS victims have a number of subtle abnormalities that set them apart from the normal population. These include the occurrence of upper airway obstruction in sleep, a reduced ability to awaken from sleep and abnormalities of the automatic control of heart rate and blood pressure in sleep. These body functions are controlled by a component of the brain called the autonomic nervous system which controls the heart and other internal functions by means of nerves cal ....Previous research has shown that SIDS victims have a number of subtle abnormalities that set them apart from the normal population. These include the occurrence of upper airway obstruction in sleep, a reduced ability to awaken from sleep and abnormalities of the automatic control of heart rate and blood pressure in sleep. These body functions are controlled by a component of the brain called the autonomic nervous system which controls the heart and other internal functions by means of nerves called the parasymmpathetic and sympathetic systems. The purpose of this project is to undertake studies of the autonomic system in normal infants and in those infants who are considered to be at risk for SIDS. As SIDS occurs almost exclusively in sleep it is important to study the infant?s heart rate and blood pressure responses to various challenges whilst asleep. All infants (both controls and subjects) enrolled in the protocol will therefore undergo overnight sleep studies during which their automatic responses to a variety of stimuli will be measured. Once we have established the normal response to these stimuli we can then compare them to the results of the at risk group. If, as we anticipate, there is a difference between our at risk group and the normal controls in automatic function then we will measure some of the stress hormones in the body which reflect the function of the autonomic nervous system. If there is a difference in the levels of these hormones between the normal and the at risk groups which correlates with the expected subtle abnormalities in function we may be able to devise an accessible and quantifiable measure for those infants at risk of SIDSRead moreRead less
Developmental Changes In Cerebral Oxygenation After Term And Preterm Birth
Funder
National Health and Medical Research Council
Funding Amount
$445,306.00
Summary
Approximately 10% of all births are preterm and the numbers of infants surviving are increasing. We have previously found that infants born preterm have lower blood pressure over the first 6 months after term equivalent age than infants born at term. We will use new technology to examine how preterm birth affects brain oxygenation and how this is altered with gestational age, sleep states and sleeping position, to provide insights into their increased risk for SIDS.