News Article | January 23, 2017
Researchers from the University of Adelaide have developed a high-tech medical device in an effort to increase safety during brain surgery. Called a "smart needle," the device is a small imaging probe. Fitted inside a brain biopsy needle, it provides surgeons a look at at-risk blood vessels when the needle is inserted, helping prevent potentially fatal bleeding in the brain. Aside from offering surgeons a view of the surgical site, the device is also able to recognize blood vessels on its own, giving out warnings when at-risk blood vessels are in proximity. Robert McLaughlin, Biophotonics chair at the University of Adelaide's Center for Nanoscale Biophotonics, explained that the smart needle contains a small fiber optic camera that's just the size of a human hair. It works by shining infrared light on the intended area to let surgeons see the blood vessels before they are accidentally damaged. The smart needle was used over the course of the last six months on 12 patients for a pilot trial program at Western Australia's Sir Charles Gairdner Hospital. The smart needle and the laboratory it was developed in was shown to Australia Sen. Simon Birmingham on Jan. 20. The lab received partial funding support from the South Australian Government, the National Health and Medical Research Council, and the Australian Research Council. According to Birmingham, the Turnbull Government had entered into a $23-million commitment to spur vital research until 2021 via the Australian Research Council's Center of Excellence for Nanoscale BioPhotonics. He also cited the smart needle as a perfect representation of how research investments can lead to real benefits and improve the lives of Australians. "We will see this as one of the first in the next generation of research breakthroughs supported by the Turnbull Government's National Innovation and Science Agenda," he added. The smart needle is set to begin formal clinical trials in 2018 and discussions are in place to manufacture the medical device in Australia. Watch McLaughlin discuss their work on the smart needle below! Last year in December, neurosurgeons from Cedars-Sinai Medical Center unveiled a high-definition imaging device called the BrightMatter Guide that will allow them to see inside a human brain during surgery. With it, surgeons will be able to map pathways safely, offering easier access for reaching and removing tumors. In the United States alone, about 62,000 primary tumors and 150,000 metastatic tumors in the brain are diagnosed every year. With these many potential brain surgeries, the BrightMatter Guide offers hope for better outcomes. Cedars-Sinai is the first facility to use the 3D imaging technology in California to carry out brain surgeries. Seeing some 600 brain surgeries each year, the hospital's medical staff will now be able to assess in real-time any issues that may occur during the procedure. Before the BrightMatter Guide, surgeons had trouble creating MRI mapping techniques that would be able to scan brain tumors in better detail. The new 3D imaging device may also be considered as a replacement for surgical microscopes as it offers a more sensitive means of scanning the brain, which can affect how the surgical procedure turns out. © 2017 Tech Times, All rights reserved. Do not reproduce without permission.
Hankey G.J.,University of Western Australia |
Hankey G.J.,Sir Charles Gairdner Hospital
The Lancet Neurology | Year: 2014
Survivors of stroke and transient ischaemic attacks are at risk of a recurrent stroke, which is often more severe and disabling than the index event. Optimum secondary prevention of recurrent stroke needs rapid diagnosis and treatment and prompt identification of the underlying cardiovascular cause. Effective treatments include organised acute assessment and intervention with antithrombotic therapy, carotid revascularisation, and control of causal risk factors, as appropriate. However, effective treatments are not implemented optimally in clinical practice. Recurrent strokes continue to account for 25-30% of all strokes and represent unsuccessful secondary prevention. Immediate and sustained implementation of effective and appropriate secondary prevention strategies in patients with first-ever stroke or transient ischaemic attack has the potential to reduce the burden of stroke by up to a quarter. © 2014 Elsevier Ltd.
Hankey G.J.,University of Western Australia |
Hankey G.J.,Sir Charles Gairdner Hospital
Thrombosis and Haemostasis | Year: 2014
This review article discusses the following, as yet unanswered, questions and research priorities to optimise patient management and stroke prevention in atrial fibrillation with the new direct oral anticoagulants (NOACs): 1. In patients prescribed a NOAC, can the anticoagulant effects or plasma concentrations of the NOACs be measured rapidly and reliably and, if so, can "cut-off points" between which anticoagulation is therapeutic (i.e. the "therapeutic range") be defined? 2. In patients who are taking a NOAC and bleeding (e.g. intracerebral haemorrhage), can the anticoagulant effects of the direct NOACs be reversed rapidly and, if so, can NOAC-associated bleeding and complications be minimised and patient outcome improved? 3. In patients taking a NOAC who experience an acute ischaemic stroke, to what degree of anticoagulation or plasma concentration of NOAC, if any, can thrombolysis be administered safely and effectively? 4. In patients with a recent cardioembolic ischaemic stroke, what is the optimal time to start (or re-start) anticoagulation with a NOAC (or warfarin)? 5. In anticoagulated patients who experience an intracranial haemorrhage, can anticoagulation with a NOAC be re-started safely and effectively, and if so when? 6. Are the NOACs effective and safe in multimorbid geriatric people (who commonly have atrial fibrillation and are at high risk of stroke but also bleeding)? 7. Can dose-adjusted NOAC therapy augment the established safety and efficacy of fixeddose unmonitored NOAC therapy? 8. Is there a dose or dosing regimen for each NOAC that is as effective and safe as adjusted-dose warfarin for patients with atrial fibrillation who have mechanical prosthetic heart valves? 9. What is the long-term safety of the NOACs? © Schattauer 2014.
Mulrennan S.,Sir Charles Gairdner Hospital
PloS one | Year: 2010
From the first case reports of pandemic influenza (H1N1) 2009 it was clear that a significant proportion of infected individuals suffered a primary viral pneumonia. The objective of this study was twofold; to assess the utility of the CURB-65 community acquired pneumonia (CAP) severity index in predicting pneumonia severity and ICU admission, and to assess the relative sensitivity of nasopharyngeal versus lower respiratory tract sampling for the detection of pandemic influenza (H1N1) CAP. A retrospective cohort study of 70 patients hospitalised for pandemic influenza (H1N1) 2009 in an adult tertiary referral hospital. Characteristics evaluated included age, pregnancy status, sex, respiratory signs and symptoms, smoking and alcohol history, CURB-65 score, co-morbidities, disabling sequelae, length of stay and in-hospital mortality outcomes. Laboratory features evaluated included lymphocyte count, C-reactive protein (CRP), nasopharyngeal and lower respiratory tract pandemic influenza (H1N1) 2009 PCR results. Patients with pandemic (H1N1) 2009 influenza CAP differed significantly from those without pneumonia regarding length of stay, need for ICU admission, CRP and the likelihood of disabling sequelae. The CURB-65 score did not predict CAP severity or the need for ICU admission (only 2/11 patients admitted to ICU had CURB-65 scores of 2 or 3). Nasopharyngeal specimens for PCR were only 62.9% sensitive in CAP patients compared to 97.8% sensitivity for lower respiratory tract specimens. The CURB-65 score does not predict severe pandemic influenza (H1N1) 2009 CAP or need for ICU admission. Lower respiratory tract specimens should be collected when pandemic (H1N1) 2009 influenza CAP is suspected.
Ryan G.,Sir Charles Gairdner Hospital
Cochrane database of systematic reviews (Online) | Year: 2012
Cystic fibrosis is a genetic disorder in which abnormal mucus in the lungs is associated with susceptibility to persistent infection. Pulmonary exacerbations are when symptoms of infection become more severe. Antibiotics are an essential part of treatment for exacerbations and inhaled antibiotics may be used alone or in conjunction with oral antibiotics for milder exacerbations or with intravenous antibiotics for more severe infections. Inhaled antibiotics do not cause the same adverse effects as intravenous antibiotics and may prove an alternative in people with poor access to their veins. To determine if treatment of pulmonary exacerbations with inhaled antibiotics in people with cystic fibrosis improves their quality of life, reduces time off school or work and improves their long-term survival. We searched ClinicalTrials.gov and the Australia and New Zealand Clinical Trials Registry for relevant trials. Date of last search: 15 March 2012We also searched the Cochrane Cystic Fibrosis Group's Cystic Fibrosis Trials Register. Date of the last search: 01 June 2012. Randomised controlled trials in people with cystic fibrosis with a pulmonary exacerbation in whom treatment with inhaled antibiotics was compared to placebo, standard treatment or another inhaled antibiotic for between one and four weeks. Two review authors independently selected eligible trials, assessed the risk of bias in each trial and extracted data. Authors of the included trials were contacted for more information. Six trials with 208 participants were included in the review. Trials were heterogenous in design and interventions (however, all included trials compared inhaled versus intravenous antibiotic regimens). Risk of bias was difficult to assess in most trials. Results were not fully reported and only limited data were available for analysis. Four trials reported some results on forced expiratory volume at one second and found no significant differences between the inhaled antibiotic and the comparison intervention. In two of these trials using 300 mg of inhaled tobramycin, the change in forced expiratory volume at one second was similar to intravenous tobramycin; and in one trial the time until the next exacerbation was not different. No important adverse effects were reported. There is little useful high-level evidence to judge the effectiveness of inhaled antibiotics for the treatment of pulmonary exacerbations in people with cystic fibrosis. The included trials were not sufficiently powered to achieve their goals. Hence, we are unable to demonstrate whether one treatment was superior to the other or not. Further research is needed to establish whether inhaled tobramycin may be used as an alternative to intravenous tobramycin for some pulmonary exacerbations.
Hillman D.R.,Sir Charles Gairdner Hospital
The Medical journal of Australia | Year: 2013
Poor sleep imparts a significant personal and societal burden. Therefore, it is important to have accurate estimates of its causes, prevalence and costs to inform health policy. A recent evaluation of the sleep habits of Australians demonstrates that frequent (daily or near daily) sleep difficulties (initiating and maintaining sleep, and experiencing inadequate sleep), daytime fatigue, sleepiness and irritability are highly prevalent (20%-35%). These difficulties are generally more prevalent among females, with the exception of snoring and related difficulties. While about half of these problems are likely to be attributable to specific sleep disorders, the balance appears attributable to poor sleep habits or choices to limit sleep opportunity. Study of the economic impact of sleep disorders demonstrates financial costs to Australia of $5.1 billion per year. This comprises $270 million for health care costs for the conditions themselves, $540 million for care of associated medical conditions attributable to sleep disorders, and about $4.3 billion largely attributable to associated productivity losses and non-medical costs resulting from sleep loss-related accidents. Loss of life quality added a substantial further non-financial cost. While large, these costs were for sleep disorders alone. Additional costs relating to inadequate sleep from poor sleep habits in people without sleep disorders were not considered. Based on the high prevalence of such problems and the known impacts of sleep loss in all its forms on health, productivity and safety, it is likely that these poor sleep habits would add substantially to the costs from sleep disorders alone.
Thani N.B.,Sir Charles Gairdner Hospital
Neurosurgery | Year: 2012
Accurate placement of a probe to the deep regions of the brain is an important part of neurosurgery. In the modern era, magnetic resonance image (MRI)-based target planning with frame-based stereotaxis is the most common technique. To quantify the inaccuracy in MRI-guided frame-based stereotaxis and to assess the relative contributions of frame movements and MRI distortion. The MRI-directed implantable guide-tube technique was used to place carbothane stylettes before implantation of the deep brain stimulation electrodes. The coordinates of target, dural entry point, and other brain landmarks were compared between preoperative and intraoperative MRIs to determine the inaccuracy. The mean 3-dimensional inaccuracy of the stylette at the target was 1.8 mm (95% confidence interval [CI], 1.5-2.1. In deep brain stimulation surgery, the accuracy in the x and y (axial) planes is important; the mean axial inaccuracy was 1.4 mm (95% CI, 1.1-1.8). The maximal mean deviation of the head frame compared with brain over 24.1 ± 1.8 hours was 0.9 mm (95% CI, 0.5-1.1). The mean 3-dimensional inaccuracy of the dural entry point of the stylette was 1.8 mm (95% CI, 1.5-2.1), which is identical to that of the target. Stylette positions did deviate from the plan, albeit by 1.4 mm in the axial plane and 1.8 mm in 3-dimensional space. There was no difference between the accuracies at the dura and the target approximately 70 mm deep in the brain, suggesting potential feasibility for accurate planning along the whole trajectory.
Honeybul S.,Sir Charles Gairdner Hospital
British Journal of Neurosurgery | Year: 2011
This report details three cases of massive post-operative cerebral swelling following autologous cranioplasty. All three patients had a bifrontal decompressive craniectomy for intractably raised intracranial pressure following severe neurotrauma, developed hydrocephalus necessitating shunt insertion and were making a poor neurological recovery. © 2011 The Neurosurgical Foundation.
Ryan G.,Sir Charles Gairdner Hospital
Cochrane database of systematic reviews (Online) | Year: 2011
Inhaled antibiotics are commonly used to treat persistent airway infection that contributes to lung damage in people with cystic fibrosis (CF). To examine the evidence that inhaled antibiotic treatment in people with CF reduces frequency of exacerbations of infection, and improves lung function, quality of life and survival. To examine adverse effects of inhaled antibiotic treatment. Trials were identified from the Cochrane Cystic Fibrosis and Genetic Disorders Group Trials Register.Last search: 31 January 2011. Trials were selected if inhaled antibiotic treatment was used for at least four weeks in people with CF, treatment allocation was randomised or quasi-randomised, and there was a control group (either placebo, no placebo or another inhaled antibiotic). Two authors independently selected trials, judged the risk of bias and extracted data from these trials. The searches identified 176 citations to 78 trials. Nineteen trials, with 1724 participants, met the inclusion criteria. Adequate meta-analysis was not possible because of the variability of study design and reporting of results. Seventeen trials with 1562 participants compared an inhaled antibiotic with placebo or usual treatment for a duration between 1 and 32 months. Inhaled tobramycin was studied in eight trials. Lung function (measured as forced expired volume in one second) was higher and exacerbations of lung infection (by different measures) were less in the antibiotic-treated group. Resistance to antibiotics increased more in the antibiotic-treated group than in placebo group when results were reported. No auditory or renal impairment was found; analysis showed tinnitus, voice alteration, hemoptysis and cough were more frequent with tobramycin than placebo. One trial, compared tobramycin with colistin in 115 participants, after one month the mean difference in forced expiratory volume at one second was 6.33 (95% confidence interval -0.04 to 12.70) favouring tobramycin. Inhaled antibiotic treatment probably improves lung function and reduces exacerbation rate, but a pooled estimate of the level of benefit is not possible. The best evidence is for inhaled tobramycin. More evidence, from trials of longer duration, is needed to determine whether this benefit is maintained and to determine the significance of development of antibiotic-resistant organisms.
Honeybul S.,Sir Charles Gairdner Hospital
Journal of Clinical Neuroscience | Year: 2010
There is much interest in the use of decompressive craniectomy for intracranial hypertension. Whilst technically straightforward, the procedure is not without significant complications. A retrospective analysis was undertaken of 41 patients who had had a decompressive craniectomy for severe head injury in the years 2006 and 2007 at the two major hospitals in Western Australia, Sir Charles Gairdner Hospital and Royal Perth Hospital. Complications attributable to the decompressive surgery were: herniation of the cortex through the bone defect, 18 patients (51%); subdural effusion, 22 patients (62%); seizures, five patients (14%) and hydrocephalus, four patients (11%). Complications attributable to the subsequent cranioplasty were: infection, four patients (11%) and bone flap resorption, six patients (17%). Syndrome of the trephined occurred in three (7%) of those patients whose bone flap had significantly resorbed. Two deaths (5.5%) occurred as a direct complication of the craniectomy or cranioplasty procedure. I attempted to define what may be regarded as a complication of the decompressive procedure rather than what may be a consequence of the primary pathological process of traumatic brain injury. © 2009 Elsevier Ltd. All rights reserved.