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Assessment of neurovascular function and cognition in adult patients with complex congenital heart disease
Expand descriptionAdults with congenital heart disease have excellent survival rate. However, late complications such as early-onset of cardiovascular events can affect quality of life later in life. We have recently demonstrated that adults with previous aortic coarctation repair (a procedure to correct narrowing of the heart’s main artery) have increased stiffening of the blood vessel in the brain, which may explain the heightened risk for stroke in this group of patients. The hardening of the blood vessel in the brain decreases the ability of the vessels to dilate effectively, thus decreasing blood flow in the brain. Over time, this can lead to poor mental performance and increases one’s risk for early-onset dementia. In this study, we are looking to examine whether patients with complex congenital heart disease may have disturbances in the blood flow in their brain and how this affects mental performance. We will use transcranial Doppler ultrasound (TCD) to measure blood flow in the brain during a series of mental tests and compare patients with complex congenital heart disease with healthy control participants. We are seeking a total of 30 participants - 15 adults with complex congenital heart disease and 15 adults without heart disease. Participants will be recruited via public advertisement, word of mouth and referral from the cardiologists at the John Hunter Hospital.
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Efficacy of implementation of the Goal-directed Medication review Electronic Decision Support System (G-MEDSS) into Home Medicines Review (HMR) to deprescribe medications in older adults
Expand descriptionBackground: This project is a cluster randomised clinical trial investigating the implementation of a computerised clinical decision support system into the Home Medicines Review (HMR) service to deprescribe inappropriate medications in older adults. Older Australians aged 65 years or over are commonly prescribed multiple medications and the doctor may arrange for a HMR. This service is a way for the pharmacist and doctor to help manage medications in the home. This project is investigating to see whether adding a computerised system into HMR will help to use medicines effectively and to avoid any unwanted side effects. Hypothesis: We hypothesise that the combination of pharmacist-led medication review (HMR) and a computerised clinical decision support system intervention that incorporates validated deprescribing tools and guides (e.g. drug burden index (DBI), patients attitudes towards deprescribing (PATD) and Goals of Care, i.e. G-MEDSS) may reduce the proportion of older adults using anticholinergic and sedative medications, and improve clinical outcomes in community-dwelling older adults. Purpose: This study aims to test the efficacy of the addition of GMEDSS in HMR to: • Reduce anticholinergic and sedative medication use (as measured by the DBI) in patients who are exposed to these medications • Measure the effect of these medication changes on clinical and functional outcomes (adherence, cognitive and physical function, falls, institutionalisation, mortality)
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Effects of resistance, endurance and high intensity interval training in middle-aged overweight and obese men.
Expand descriptionHigh-intensity interval training (HIIT) is becoming more widely recognized as a time-efficient alternative to traditional endurance exercise for improving markers of cardiopulmonary and metabolic health. A major benefit of HIIT is the time-efficiency of a single exercise session which can be completed in under 30 minutes. HIIT involves short, repeated periods of work at or above maximal aerobic capacity interspersed with rest intervals (e.g. 1 min work, 1 min rest repeated 10 times). Given that HIIT requires rapid contraction of type 2 skeletal muscle fibres, as seen with resistance exercise, it is possible that HIIT may also be able to precipitate muscle mass gains. Whether HIIT with protein supplementation can facilitate similar skeletal muscle adaptations reported following resistance exercise, such as hypertrophy, remains understudied in the literature. When an individual stops training (i.e. detraining), loss of adaptation from exercise can occur. However, no study to date has investigated the effects of a short-term (i.e. 2½ weeks) detraining period on measures of strength and aerobic fitness between resistance, endurance and HIIT training. The purpose of this study is to investigate the metabolic and anabolic effects of 6 weeks of HIIT with protein supplementation on measures of muscle cross sectional area, body composition, resting metabolic rate, blood glucose control, muscle architecture, maximal strength and aerobic capacity in overweight and obese adults. Study aims: 1. Compare the anabolic/muscle growth effects of six weeks of HIIT with protein supplementation vs resistance exercise with protein supplementation 2. Compare the metabolic effects of six weeks of HIIT with protein supplementation vs endurance exercise with protein supplementation 3. Investigate the metabolic and anabolic effects of a 2½-week detraining period following each of the exercise interventions Study hypotheses: 1. HIIT with protein supplementation will induce comparable increases in muscle fibre cross-sectional area, lean body mass, whole muscle transcriptome responses, muscle architecture, compared to resistance exercise with protein supplementation 2. HIIT with protein supplementation will induce comparable increases in insulin sensitivity, resting metabolic rate and mitochondrial protein content compared to endurance exercise with protein supplementation 3. Following a 2½-week detraining period, HIIT with protein supplementation will result in comparable losses in muscle cross sectional area, lean body mass, muscle thickness and muscle transcriptome responses compared to resistance exercise with protein supplementation 4. Following a 2½-week detraining period, greater losses in muscle cross sectional area, lean body mass, muscle thickness and muscle transcriptome responses will occur with endurance compared to HIIT exercise
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A pilot study to investigate the effects of pentosan polysulfate sodium in Ross River virus induced arthralgia
Expand descriptionThis will be a double blind randomised placebo controlled study in 24 subjects with Ross River virus induced arthralgia. Rationale PPS is a semi-synthetic heparin like macromolecular carbohydrate that resembles glycosaminoglycans. It has been widely used for its anti-inflammatory and regenerative properties in the treatment of interstitial cystitis. PPS also has fibrinolytic, lipolytic, and anticoagulant properties and is used for the treatment of thromboembolic prophylaxis in Europe. In Germany and Hungary, PPS is also approved in oral and injectable form for the treatment of peripheral arterial occlusive disease. In a recent study in mice with Ross River virus induced joint disease, PPS administered for 10 days post infection significantly reduced the severity of joint symptoms, with reductions in joint swelling, inflammation in joints and muscle, and serum levels of mediators of inflammation which are implicated in the disease. PPS treatment also demonstrated a joint cartilage protective effect, with preservation of the thickness and structure of the joint cartilage. On the basis of this research, Paradigm intends to evaluate the safety and efficacy of PPS treatment in human patients affected by joint symptoms following Ross River viral infection The main inclusion criteria for the study will be: 1. Males and females aged 18 to 65 years (inclusive) 2. Diagnosis of Ross River virus infection based on laboratory definitive or laboratory suggestive diagnosis 3. Current Ross River virus symptoms including a minimum 2 joints involved 4. The onset of RRV infection symptoms minimum 12 weeks and maximum 52 weeks prior to Day 1 Treatment Intervention Patients will be randomised 2;1 to receive either PPS or placebo respectively. Dose schedule: 2 mg/kg administered by subcutaneous injection twice weekly for 6 weeks. Treatments will be given by medically qualified site staff, and patients will be evaluated and monitored at the regular visits during the study. Objectives The primary objective will be to evaluate the safety and tolerability of subcutaneous pentosan polysulfate sodium (PPS) in subjects with Ross River virus (RRV
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A pilot trial of the iENGAGE Program; games for mothers to play with their children to improve children’s self-control.
Expand descriptionThe Dunedin Child Development study is tracking a birth cohort of 1,000 people born in Dunedin, New Zealand in 1972, Poor self-control was found to be a strong predictor of membership of the 20% of individuals who, over the next four decades, generated 80% of all health, social welfare and crime costs in the cohort studied. This finding has attracted considerable attention from colleagues, policy makers, media, and the public as to the importance of self-control skills mastered in childhood for success in all facets of adult life. Improved self-control could therefore be an attractive intervention target. In this vein, Healey and Halperin (2015) developed an early intervention programme called ENGAGE aimed at coaching mothers to foster the development of self-control in their difficult to manage pre-schoolers. The mothers learnt or re-learnt familiar games (Simon Says, Musical Statues etc) directed at teaching child self-control and were encouraged to implement these with their children between clinic visits. Gains were large and were maintained over a twelve month follow up period. The ENGAGE study established the practicality of this face-to-face or clinic intervention in child self-control. However, for use on a population basis, this programme would need to be automated for web-based delivery. The Clinical Research Unit for Anxiety and Depression (CRUfAD) at St Vincent’s Hospital, Sydney have developed a web-based version of the ENGAGE course called iENGAGE. The iENGAGE Program is a self-managed, 10 week online intervention consisting of 6 lessons involving participation in games to improve self-control. These games are designed to teach self-control in fun and functional ways appropriate to a child (e.g. musical statues to teach the child how to stop/stand still when asked), and as a result build the strengths of the child and bolster the child-parent relationship. The online iENGAGE programme offers the advantages of being cost-effective, widely distributed (including in rural areas), available at a time and place convenient to the user, private and confidential, self-empowering, and deliverable with high fidelity. We wish to conduct a pilot trial of iENGAGE to test feasibility, acceptability, and preliminary efficacy of the online program in improving self-control in difficult to manage children as rated by their mothers. Results will be used to improve iENGAGE before passing the augmented program to Professor Rapee at Macquarie University to conduct a randomised controlled trial to establish efficacy and safety. Once efficacy and safety are established, CRUfAD will adapt the program for a large cluster RCT in New Zealand preschools. If this is successful then CRUfAD will adapt it for use as an integral part of New Zealand early childhood services delivered by the Plunkett Society.
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Evaluating the efficacy of additional self-compassion or cognitive therapy for treatment of post-traumatic stress disorder (PTSD) and depressive disorders
Expand descriptionThe aim of the study is to compare two treatment protocols for first presentations of either PTSD or depressive disorders. The 'intervention' is self-compassion combined with behavioural therapies. The 'control' or standard treatment is cognitive therapy combined with behavioural therapies.
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SUcceSS: SUrgery for Spinal Stenosis – A randomised, placebo-controlled trial
Expand descriptionSurgical decompression for symptomatic spinal stenosis is justified primarily upon clinical experience, expert consensus and pathophysiological considerations, not high quality clinical trials – results of past research have been significantly confounded by placebo effects of surgery. There is an urgent need to rigorously test decompressive surgery for spinal stenosis as the intervention is expensive and potentially harmful and is increasingly used reflecting our ageing community. The efficacy of surgical decompression, the most popular procedure for spinal stenosis, has not yet been proven, as it has never gone through high level of scientific scrutiny to establish its efficacy or safety beyond placebo effects. The SUcceSS trial aims to randomly allocate 160 participants with chronic, symptomatic lumbar spinal stenosis to either decompressive surgery or placebo surgery to measure the efficacy of decompressive surgery on patients' outcomes with central spinal canal stenosis.
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SMOFLipid vs Clinoleic - randomised controlled trial
Expand descriptionSurvival of high-risk premature babies has improved significantly in the last 20 years. Feeding intolerance is a common issue seen in extremely preterm babies, and in those with conditions such as gastroschrisis, definite necrotising enterocolitis, and short bowel syndrome. Long-term support with parenteral nutrition (PN) is crucial for these babies to provide optimal nutrition at a critical stage of development. Lipid formulations are an important component of PN, being a good source of energy, essential fatty acids (EFA), and also of long chain polyunsaturated fatty acids (LC-PUFAs). In recent years, focus on omega-3 fatty acids has stipulated that increased omega-3 LCPUFA, mainly docosahexanoic acid (DHA), supplementation may have extra beneficial effects for extremely premature babies who have higher rates and severity of neonatal diseases of prematurity, such as late onset sepsis, necrotising enterocolitis, respiratory diseases of the newborn, and as such have a higher inflammatory status. A recent study by Deshpande et al. (2014) examined the use of SMOFLipid, a lipid emulsion with higher omega-3 content, compared to ClinOleic, a lipid emulsion with low omega-3 content, and found that eicosapentanoic acid (EPA) levels, and F2-isoprostane (an inflammatory marker) were slightly decreased. However docosahexanoic acid (DHA) levels were found to be similar. Soybean lipid emulsions are associated with parenteral nutrition-associated cholestasis and liver disease and studies with using pure fish oil based emulsion showed improvement in the cholestasis. The effect on phytosterol levels by lipid emulsions has not previously been studied in extremely premature neonates. This randomised controlled trial will compare the fatty acid levels, phytosterol levels, liver function tests and conjugated bilirubin in both groups. We hypothesis that in very preterm neonates born before 29 weeks, fish oil based lipid emulsion will result in higher omega-3 fatty acids levels as compared to standard olive oil based lipid emulsion.
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The effectiveness of a practice change intervention to increase the provision of recommended care for addressing maternal alcohol consumption during pregnancy.
Expand descriptionThis study aims to determine the effectiveness of a practice change intervention in increasing the provision of best practice care for alcohol consumption during pregnancy. The study will be conducted as a stepped-wedge controlled trial, with staggered (random order) implementation of the intervention across antenatal services in three health sectors within the Hunter New England Local Health District, New South Wales, Australia. The intervention will consist of evidence-based practice change strategies including leadership support, training, performance feedback, and system prompts. The prevalence of alcohol-related best practice care at three time points in pregnancy (booking in visit, 28 week visit and 36 week visit) will be the outcomes of interest. Repeated, weekly cross-sectional measurement of these outcomes will occur for 34 months via telephone or online surveys with a random sample of women who attended the services in the previous week. An intervention effect will be demonstrated by a cumulative increase in recommended care delivery across combined sites.
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Effects of 3 different phosphate binders on the formation of calciprotein particles in participants receiving haemodialysis treatment
Expand descriptionThe purpose of the study is to look at the effect of 3 registered phosphate binder on serum calci-protein particle formation. It is hypothesised that formation of these particles may link inflammation with vascular stiffening and calcification. In turn the class of phosphate binder used my impact the quantity of these particles produced.