Search

Purpose: While cochlea is adult size at birth, etiologies and bone density may differ between children and adults. Differences in neural response thresholds (tNRT) and the spread of excitation (SOE) width may impact the use of artificial intelligence algorithms in speech processor fitting. Aim: To identify whether neural response telemetry threshold and spread of excitation width are similar in adults and children. Methods: Retrospective cross-sectional study approved by the Ethical Board. Intraoperative tNRT and SOE recordings of consecutive cochlear implant surgeries in adults and children implanted with Cochlear devices (Cochlear™, Australia) were selected. SOE was recorded on electrode 11 (or adjacent, corresponding to the medial region of the cochlea) through the standard forward-masking technique in Custom Sound EP software, which provides SOE width in millimeters. Statistical comparison between adults and children was performed using the Mann–Whitney test (p ≤ 0.05). Results: Of 1282 recordings of intraoperative evaluations, 414 measurements were selected from children and adults. Despite the tNRT being similar between adults and children, SOE width was significantly different, with lower values in children with perimodiolar arrays. Besides, it was observed that there is a difference in the electrode where the SOE function peak occurred, more frequently shifted to electrode 12 in adults implanted. In straight arrays, there was no difference in any of the parameters analyzed on electrode 11. Conclusion: Although eCAP thresholds are similar, SOE measurements differ between adults and children in perimodiolar electrodes. [ABSTRACT FROM AUTHOR]

It is now widely accepted that many of the problems we face in public health are complex, from chronic disease to COVID-19. To grapple with such complexity, researchers have turned to both complexity science and systems thinking to better understand the problems and their context. Less work, however, has focused on the nature of complex solutions, or intervention design, when tackling complex problems. This paper explores the nature of system intervention design through case illustrations of system action learning from a large systems level chronic disease prevention study in Australia. The research team worked with community partners in the design and implementation of a process of system action learning designed to reflect on existing initiatives and to reorient practice towards responses informed by system level insights and action. We were able to observe and document changes in the mental models and actions of practitioners and in doing so shine a light on what may be possible once we turn our attention to the nature and practice of system interventions. [ABSTRACT FROM AUTHOR]

Prevention of chronic diseases happens within systems of action across whole communities. In local communities, organisations play important roles that influence health, but many are in non-health sectors where health or 'prevention' is not their main remit. In this paper, we explore how organisations in communities perceive their role as part of a local system of chronic disease prevention. We use interview data from 'Prevention Tracker', an investigation undertaken with Australian communities that aimed to describe how local prevention systems are organised. Four communities participated – one regional, one remote, and two urban. In each, local advisory groups identified key informants for semi-structured interviews (n = 80). We applied the Ottawa Charter for Health Promotion as a sensitising framework to categorise responses; and undertook inductive thematic analysis to generate deeper insights into organisations' orientation to prevention. While some respondents clearly recognised and articulated linkages between their organisation's activities and prevention, sometimes drawing from health promotion principles to do so, many did not and were prompted by the interview to consider their contributions. A proportion explicitly distanced themselves from prevention despite their work directly addressing the social determinants that underscore health. For some, this distancing reflects a tactical decision to reduce competition and promote partnership between organisations, and to engage clients. This study demonstrates that diverse organisations make contributions to prevention – often outside of 'core business' – whether or not the organisations themselves realise, relate to and/or self-identify as playing this role. [ABSTRACT FROM AUTHOR]

Purpose: To assess whether there is an interference of the spread of excitation (SOE) on speech recognition., Methods: Retrospective cross-sectional study, approved by the institution's ethics committee (CAAE03409212.8.0000.0068). Adult patients with intraoperative neural response telemetry (NRT) performed on electrodes 6, 11 and 16 implanted with Cochlear Ltd (Sydney, Australia) devices were selected. Patients with partial array insertion, pre-lingual hearing loss, deafness etiology due to and CI experience less than 12 months were excluded. SOE was recorded at 10 current units above the NRT threshold (tNRT) and its width in millimeters was collected at point 0.75 of the function. Speech recognition test was 25-recorded monosyllables list, presented at 65 dBHL at 0° azimuth in a sound treated booth. The analysis was divided into groups by electrode array type, regarding the tNRT, SOE width, SOE's peak amplitude and electrode peak., Results: A 126 SOE measurements of the 3 tested electrodes were obtained from 43 patients. Patients with straight array had significantly wider SOE, greater peak amplitude at electrode 6 and higher tNRTs. In the perimodiolar array, there was a negative correlation between SOE and monosyllables recognition at electrodes 6 and 11, and in the combined average of the three electrodes, with a significant difference in electrode 11. Sixty-six percent of the SOE measurements had their peak shifted to adjacent electrodes., Conclusion: It was observed, in perimodiolar array, the greater the dispersion of electrical current, the worse the speech recognition, especially in the medial electrode.

Objective: The estimation of demand for treatment is one of the important elements in planning for alcohol and other drug treatment services. This article reports on a demand-projection model used in Australia to estimate the extent of unmet treatment demand by drug type., Method: The model incorporated the prevalence of substance use disorders (by drug type and age), with the application of a severity distribution, which distributed the substance abuse disorders into three disability categories: mild, moderate, and severe. The application of treatment rates derived from expert judgments reflecting the proportion of people within disability categories who would be suitable for, likely to seek, and benefit from treatment. Sensitivity analyses incorporating variations to the severity distributions and treatment rates were applied, along with adjustment for polydrug use., Results: The estimate for treatment demand for Australia varied between a low of 411,740 people and a high of 755,557 people. The most sensitive parameter is the expected treatment-seeking rate. Given that approximately 200,000 to 230,000 people are currently in treatment, this represents a met demand of between 26.8% and 56.4%., Conclusions: There is insufficient alcohol and drug treatment available to meet the demand in Australia, despite Australia's relatively high met demand, when compared with other countries.