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Neural Mechanisms Mediating Inhibitory Influences Of Hyperthermia, Fever And Age On Water Intake
Funder
National Health and Medical Research Council
Funding Amount
$324,125.00
Summary
An adequate intake of fluid following losses of body water that can occur as the result of sweating in hot weather, exercise, vomiting or diarrhoea is necessary so that dangerous levels of dehydration do not occur. Thus, it is important for our health that thirst is properly stimulated when we do become dehydrated, in order that we are aware that we must drink water. There may be conditions in which the thirst mechanism is inhibited, and the aim of these experiments is to identify and understand ....An adequate intake of fluid following losses of body water that can occur as the result of sweating in hot weather, exercise, vomiting or diarrhoea is necessary so that dangerous levels of dehydration do not occur. Thus, it is important for our health that thirst is properly stimulated when we do become dehydrated, in order that we are aware that we must drink water. There may be conditions in which the thirst mechanism is inhibited, and the aim of these experiments is to identify and understand mechanisms by which the thirst mechanism in the brain is supressed. We have observed that a high body temperature may have an inhibitory influence on thirst in rats, and it is also known that thirst mechanisms are depressed in elderly people. If we can identify the regions of the brain that are involved and the mechanisms underpinning this reduced thirst, then it will be possible to identify and alert people at risk and to design strategies to prevent dangerous levels of dehydration occurring due to reduced thirst, particularly in the elderly. This may also apply to to people who may be working or undertaking vigorous exercise in hot weather or taking certain medications.Read moreRead less
Randomised Comparison Of Fluid Resuscitation With Human Albumin Solution Or Normal Saline Among Critically Ill Patients
Funder
National Health and Medical Research Council
Funding Amount
$611,728.00
Summary
Human albumin solution is widely used for the emergency treatment of severely ill patients requiring fluid replacement, both in Australia and worldwide. However, a recent report suggests that compared to the other standard treatment (salt solution), the use of human albumin solution may be associated with a higher death rate (about six additional deaths among every one hundred patients treated). But, this report was based on data from a relatively small number of patients among whom there was a ....Human albumin solution is widely used for the emergency treatment of severely ill patients requiring fluid replacement, both in Australia and worldwide. However, a recent report suggests that compared to the other standard treatment (salt solution), the use of human albumin solution may be associated with a higher death rate (about six additional deaths among every one hundred patients treated). But, this report was based on data from a relatively small number of patients among whom there was a relatively small number of deaths, and there is widespread uncertainty among doctors about the reliability of the evidence and the implications for patient care. This is reflected in the large difference between intensive care units in the use of human albumin solution (in Australia, its use ranges from 10-90% of all patients needing fluid). Human albumin solution costs, about thirty times more than salt solution, and during 1998 more than 200,000 bottles of human albumin solution were administered to patients in Australia, at a cost of about A$35 million. In an effort to provide definitive evidence about the effects (and cost-effectiveness) of fluid replacement with human albumin solution, the Australia and New Zealand Intensive Care Society, in collaboration with the Australian Red Cross Blood Services and the Institute for International Health, has proposed the conduct of new large-scale study (SAFE - Saline vs Albumin Fluid Evaluation). This study will involve 7,000 patients from 15 intensive care units in Australia and New Zealand. These patients (all of whom require fluid replacement) will be randomly assigned to receive either human albumin solution or salt solution and outcome in terms of deaths and other serious events will be monitored over 28 days. Results will be available within 2 years of starting the study, and these are likely to influence the care of the majority of seriously ill patients admitted to intensive care units worldwide.Read moreRead less