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I am a developmental lung physiologist who specialises in understanding the factors regulating normal and abnormal lung development as well as the physiological transformation of the lung into an efficient gas-exchange organ at birth.
I am a developmental lung physiologist who specialises in understanding the factors regulating normal and abnormal lung development as well as the physiological transformation of the lung into an efficient gas-exchange organ at birth.
Mechanical Mobility Of The Thorax For Continuous Determination Of Lung Gas Volume
Funder
National Health and Medical Research Council
Funding Amount
$165,000.00
Summary
Percussion is a valuable clinical method for physical examination of parts of the body. A sharp tap (impulsive force) is applied to the body wall and the sound radiated in response is observed. This sound may be dull (over liver) or stony dull (pleural effusion), or resonant (over normal lung) or hyper-resonant (over bowel). While the variation in radiated sound is not fully understood, it is apparent that the presence of gas, which is highly compliant, increases mobility of the overlying tissue ....Percussion is a valuable clinical method for physical examination of parts of the body. A sharp tap (impulsive force) is applied to the body wall and the sound radiated in response is observed. This sound may be dull (over liver) or stony dull (pleural effusion), or resonant (over normal lung) or hyper-resonant (over bowel). While the variation in radiated sound is not fully understood, it is apparent that the presence of gas, which is highly compliant, increases mobility of the overlying tissue and allows it to resonate; where the sub-tissue is largely fluid, tissue mobility is low and the percussive sound is dull. Percussion is useful for examining the adult chest and lung, but cannot for example be applied in infant intensive care as only limited impulsive force can be used, and the adult finger, which is both a coupling device and sounding board, is too large. As well, percussion requires skill and quiet conditions. Accordingly, we developed a device to measure mobility of the chest and other tissues in real time. The VibroPulse applies a known low-level force to the body surface and records the resultant velocity induced in the surface. The force is generated by a vibrating mass set in motion by an electromagnetic motor driven by pseudo-random noise. Tissue mobility, defined as velocity-force, is derived simultaneously across the frequency range, providing an easily interpreted quantitative output unaffected by ambient noise. This proposal has two aims we can achieve in 1 year: (1) to continue evaluating VibroPulse sensitivity to tissue composition, using symmetrical percussive sites on the human chest and abdomen that are dull on one side and resonant on the other, and the chest of anaesthetised animals with experimentally induced pneumothorax and lung collapse, two life-threatening conditions for which percussion is a key diagnostic method, and (2) to engineer a small device from our bulky prototype that is suitable for clinical use, in infants and adults.Read moreRead less
Respiratory failure at birth is a major cause of death and disease in newborn infants. At birth the airways must be cleared of liquid to allow the inhalation of air, but, little is known about the process of lung aeration, because it has not been possible to observe or measure it. We have developed imaging and analytical techniques to observed and measure lung aeration. We will determine ventilation procedures that promote uniform lung aeration and minimise lung injury in ventilated infants.
Imaging Lung Aeration And Lung Motion Following Very Premature Birth
Funder
National Health and Medical Research Council
Funding Amount
$517,631.00
Summary
Using a synchrotron as an X-ray source, we will image the lungs as they aerate at birth and optimise ventilation strategies that improve lung aeration while minimising the risk of ventilation-induced lung injury.
Inter-hospital Variations In Outcomes Of Very Preterm Infants Admitted To Neonatal Intensive Care Units
Funder
National Health and Medical Research Council
Funding Amount
$130,440.00
Summary
Most babies who are born very preterm (less than 32 weeks' gestation; ie more than 2 months early) are admitted to a neonatal intensive care unit (NICU). These babies stay in hospital for 2 to 4 months and need lots of care (using vast amounts of the available health resources). When compared to babies born at term, these very preterm babies are much more likely to die or to suffer from a range of poor outcomes that impact on their long-term development and quality of life. The Australian and Ne ....Most babies who are born very preterm (less than 32 weeks' gestation; ie more than 2 months early) are admitted to a neonatal intensive care unit (NICU). These babies stay in hospital for 2 to 4 months and need lots of care (using vast amounts of the available health resources). When compared to babies born at term, these very preterm babies are much more likely to die or to suffer from a range of poor outcomes that impact on their long-term development and quality of life. The Australian and New Zealand Neonatal Network (ANZNN) is a collaboration of clinical staff in all 29 NICUs in the region, whose aim is to improve the care of high-risk newborn infants and their families in Australia and New Zealand through collaborative audit and research. This audit has reported considerable differences in the rates of death and poor outcomes between NICUs. Other networks have reported similar variations. Variations in outcomes could be due to 1) differences in the way the diagnosis is made in each unit, 2) differences in how small or ill the babies are when admitted, or 3) different quality of care in each NICU. We need to take account of the first two possibilities before we can compare NICUs fairly and allow them to work towards achieving the best outcomes for very premature babies. To do this, our project will use advanced statistical techniques to look at the risk factors associated with death and poor outcome in very preterm babies. We will then be able to 'predict' outcomes and see if the differences between NICUs are real or not. If the variation between units is explained by differences in clinical practices, then this has enormous potential for quality improvement within the NICUs and through the development of new policy guidelines for clinical practice. The statistical models developed during this project will be useful for clinicians in other health areas and in other countries.Read moreRead less
Optimising Lung Protective Resuscitation Using A Newborn Premature Lamb Model
Funder
National Health and Medical Research Council
Funding Amount
$392,218.00
Summary
Premature babies are at risk of severe, and potentially long-term, lung damage. These complications can be minimised if babies are optimally resuscitated at birth. This project will use promising new imaging technologies to examine the influence of different strategies, using mechanical ventilators, to help inflate the lung at birth, and their interactions with other therapies used to enhance lung maturity. It will provide new insights into resuscitating preterm babies.
Defining Regional Lung Mechanics To Improve Lung Protective Ventilation Strategies In Newborn Infants
Funder
National Health and Medical Research Council
Funding Amount
$287,321.00
Summary
Over 3000 newly born infants require mechanical ventilation in Australia every year. The majority are very premature infants. About 30% of ventilated infants develop serious ventilator induced lung injury. Minimising such lung injury with improved techniques of ventilation which can protect the lung from injury will reduce the considerable short and long term health burden of this population.
Circulatory Biomarkers For Idiopathic Pulmonary Fibrosis: Improving Patient Outcomes
Funder
National Health and Medical Research Council
Funding Amount
$841,625.00
Summary
We are going to find molecules in the blood that would improve the diagnosis and treatment of a lung condition called Idiopathic Pulmonary Fibrosis (IPF). The project brings together well characterized patients from the Australian IPF registry, blood samples we have collected from them and cutting edge technologies to complete this project.
Reducing Perinatal Lung, Heart And Brain Injury In Preterm Infants – From Bench To The Clinic.
Funder
National Health and Medical Research Council
Funding Amount
$463,652.00
Summary
Many infants are exposed to an adverse environment whilst developing in the womb, and are therefore at increased risk of lung, heart and brain injury, with life-long consequences. This research is focused on improving the entry into the world of vulnerable infants, thus reducing the risk and severity of brain injury.