Publications

Abstract

Purpose

To investigate the practices of repair that exist for users of mobility assistive products in low resource settings, as well as the psychosocial impact that the repair, or non-repair, of these devices has on users’ lives.

Materials and Methods

This article collates data on repair practices and the responses from participants on the topic of repair from studies conducted by the authors across four different low resource settings in Kenya, Uganda, Sierra Leone, and Indonesia. This data was then analyzed to identify the common themes found across geographies.

Results

Three major models of repair practice emerged from the data: “Individual or Informal Repair in the Community”; “Local Initiatives”; and “Specialist AT Workshop Repair”. Additionally, the wider impact on the participants’ lives of “Problems & Concerns with Repair”; “Experiences of Breakages & Frequencies of Repair” and the “Impact of Broken Devices” are explored.

Conclusions

The results of this analysis demonstrate the paramount importance of community-based repair of devices, and how despite this importance, repair is often overlooked in the planning and design of assistive products and services. There is a need to further incorporate and support these informal contributions as part of the formal provision systems of assistive device.

Ben Oldfrey, Cathy Holloway, Julian Walker, Steven McCormack, Bernadette Deere, Laurence Kenney, Robert Ssekitoleko, Helen Ackers & Mark Miodownik (2023) Repair strategies for assistive technology in low resource settings, Disability and Rehabilitation: Assistive Technology, DOI: 10.1080/17483107.2023.2236142

Elastomeric liners are commonly worn between the prosthetic socket and the limb. A number of improvements to the state of the art of liner technology are required to address outstanding problems. A liner that conforms to the residuum more accurately, may improve the skin health at the stump-socket interface. Previous work has shown that for effective thermal management of the socket environment, an active heat removal system is required, yet this is not available. Volume tracking of the stump could be used as a diagnostic tool for looking at the changes that occur across the day for all users, which depend on activity level, position, and the interaction forces of the prosthetic socket with the limb. We believe that it would be advantageous to embed these devices into a smart liner, which could be replaced and repaired more easily than the highly costly and labour-intensive custom-made socket. This paper presents the work to develop these capabilities in soft material technology, with: the development of a printable nanocomposite stretch sensor system; a low-cost digital method for casting bespoke prosthetic liners; a liner with an embedded stretch sensor for growth / volume tracking; a model liner with an embedded active cooling system.

, Additive manufacturing techniques for smart prosthetic liners, Medical Engineering & Physics, Volume 87, 2021, Pages 45-55, ISSN 1350-4533, https://doi.org/10.1016/j.mede....

From multiple studies conducted through the FCDO AT2030 Programme, as well as key literature, we examine whether Assistive Technology (AT) provision models could look towards more sustainable approaches, and by doing this benefit not only the environment, but also address the problems that the current provision systems have. We show the intrinsic links between disability inclusion and the climate crisis, and the particular vulnerability people with disabilities face in its wake. In particular, we discuss how localised circular models of production could be beneficial, facilitating context driven solutions and much needed service elements such as repair and maintenance. Key discussion areas include systems approaches, digital fabrication, repair and reuse, and material recovery. Finally, we look at what needs be done in order to enable these approaches to be implemented. In conclusion, we find that there are distinct parallels between what AT provision models require to improve equitable reliable access, and strategies that could reduce environmental impact and bring economic benefit to local communities. This could allow future AT ecosystems to be key demonstrators of circular models, however further exploration of these ideas is required to make sense of the correct next steps. What is key in all respects, moving forward, is aligning AT provision with sustainability interventions.

Oldfrey, B.; Barbareschi, G.; Morjaria, P.; Giltsoff, T.; Massie, J.; Miodownik, M.; Holloway, C. Could Assistive Technology Provision Models Help Pave the Way for More Environmentally Sustainable Models of Product Design, Manufacture and Service in a Post-COVID World? Sustainability 2021, 13, 10867. https://doi.org/10.3390/su1319...

It is essential to understand the strategies and processes which are deployed currently across the Assistive Technology (AT) space toward measuring innovation. The main aim of this paper is to identify functional innovation strategies and processes which are being or can be deployed in the AT space to increase access to AT globally. We conducted a scoping review of innovation strategies and processes in peer-reviewed literature databases and complemented this by identifying case studies demonstrating innovation strategies. The review includes WHO world region, publication year, AT type and a sector analysis against the Systems-Market for Assistive and Related Technologies Framework. We analyzed the case studies and interviews using thematic analysis. We included 91 papers out of 3,127 after review along with 72 case studies. Our results showed that product innovations were more prevalent than provision or supply innovations across papers and case studies. Case studies yielded two themes: open innovation (OI); radical and disruptive innovation. Financial instruments which encourage OI are needed and we recommend pursuing OI for AT innovation. Embedding AT within larger societal missions will be key to success governments and investors need to understand what AT is and their translational socioeconomic value.

Catherine Holloway, Dafne Zuleima Morgado Ramirez, Tigmanshu Bhatnagar, Ben Oldfrey, Priya Morjaria, Soikat Ghosh Moulic, Ikenna D. Ebuenyi, Giulia Barbareschi, Fiona Meeks, Jessica Massie, Felipe Ramos-Barajas, Joanne McVeigh, Kyle Keane, George Torrens, P. V.M. Rao, Malcolm MacLachlan, Victoria Austin, Rainer Kattel, Cheryl D Metcalf & Srinivasan Sujatha (2021) A review of innovation strategies and processes to improve access to AT: Looking ahead to open innovation ecosystems, Assistive Technology, 33:sup1, 68-86, DOI: 10.1080/10400435.2021.1970653

Posterior Cortical Atrophy is a rare but significant form of dementia which affects people's visual ability before their memory. This is often misdiagnosed as an eyesight rather than brain sight problem. This paper aims to address the frequent, initial misdiagnosis of this disease as a vision problem through the use of an intelligent, cost-effective, wearable system, alongside diagnosis of the more typical Alzheimer's Disease. We propose low-level features constructed from the IMU data gathered from 35 participants, while they performed a stair climbing and descending task in a real-world simulated environment. We demonstrate that with these features the machine learning models predict dementia with 87.02% accuracy. Furthermore, we investigate how system parameters, such as number of sensors, affect the prediction accuracy. This lays the groundwork for a simple clinical test to enable detection of dementia which can be carried out in the wild.