Jarl Reitan

Optimizing the performance of phase-change materials in personal protective clothing systems.

Phase-change materials (PCM) can be used to reduce thermal stress and improve thermal comfort for workers wearing protective clothing. The aim of this study was to investigate the effect of PCM in protective clothing used in simulated work situations. We hypothesized that it would be possible to optimize cooling performance with a design that focuses on careful positioning of PCM, minimizing total insulation and facilitating moisture transport. Thermal stress and thermal comfort were estimated through measurement of body heat production, body temperatures, sweat production, relative humidity in clothing and subjective ratings of thermal comfort, thermal sensitivity and perception of wetness. Experiments were carried out using 2 types of PCM, the crystalline dehydrate of sodium sulphate and microcapsules in fabrics. The results of 1 field and 2 laboratory experimental series were conclusive in that reduced thermal stress and improved thermal comfort were related to the amount and distribution of PCM, reduced sweat production and adequate transport of moisture.

Cooling vest for improving surgeons' thermal comfort: a multidisciplinary design project.

A laparoscopic surgeon sometimes experiences heat-related discomfort even though the temperature situation is moderate. The aim of this project was to design a cooling vest using a phase change material to increase thermal comfort for the surgeon. The project focused on the design process to reveal the most important parameters for the design of a cooling vest that could be demonstrated in a clinical setting. We performed an entire design process, from problem analysis, situation observations, concept for a prototype, temperature measurements, and a final design based on clinical testing. The project was conducted by a multidisciplinary team consisting of product designers, engineers, physiologists, and surgeons. We carried out four physiological demonstrations of one surgeon’s skin temperatures and heart rate during different laparoscopic procedures. A commercially available cooling vest for firemen and two proof-of-concept prototypes were tested alongside a reference operation without cooling. To aid the final design, one person went through a climate chamber test with two different set-ups of cooling elements. The final design was found to improve the conditions of our test subject. It was found that whole trunk cooling was more effective than only upper trunk cooling. A final design was proposed based on the design process and the findings in the operating room and in the laboratory. Although the experiences using the vest seemed positive, further studies on several operators and more surgical procedures are needed to determine the true benefits for the operator.

The Use of Generative Techniques in Co-design of mHealth Technology and Healthcare Services for COPD Patients

People suffering from COPD commonly experience exacerbations leading to hospital admissions. mHealth technologies holds a potential for improved healthcare delivery to this group, with a possible impact on preventing COPD exacerbations. Designing appropriate technology and services for people with COPD requires an in-depth understanding of their needs, values and life situation. Co-design is an approach where users are actively involved in the design process, with democratic participation and empowerment at its center. We involved COPD patients in exploring their perspective on how mHealth technology and appurtenant healthcare services could support them. By the use of generative tools, we identified central aspects that the participants experienced to be of importance related to their health condition and disease. We here report on the main findings using this approach and on reflections on the process.

Even Modular Products can be Unmanageable

Structured, modular product programs have been presented as the solution to the conflict between market and production in many companies. The value of this is not disputed, but in working with a company that has done “all the right things”, new issues come up that will influence how these product programs are designed. The market aspect is crucial, because it threatens to destroy internal efficiency in the company, and handling this is an essential prerequisite for success.

Ambient assistive technology considered harmful

Ambient assistive technology (AAT) is envisioned as a powerful tool for facing the growing demands the demographic change toward an aging society puts on care. While AAT is often expected to increase the quality of life of older people, this paper holds that relevant interventions often embody values that can contradict such visions, and in some cases even be harmful to care receivers. We argue that the strong focus AAT puts on illness and risk management reflects a medical model of care, which often disregards the psychosocial challenges that impairments and disabilities associated with old age can rise. We suggest that design of AAT could benefit from using the social model of care as design inspiration and value foundation. Such an approach puts focus on the person rather than the illness. The paper ends by providing a short description of work in which the social model of care is adopted as a basis for design of AAT.

A user-centred design process of new cold-protective clothing for offshore petroleum workers operating in the Barents Sea

Petroleum operations in the Barents Sea require personal protective clothing (PPC) to ensure the safety and performance of the workers. This paper describes the accomplishment of a user-centred design process of new PPC for offshore workers operating in this area. The user-centred design process was accomplished by mixed-methods. Insights into user needs and context of use were established by group interviews and on-the-job observations during a field-trip. The design was developed based on these insights, and refined by user feedback and participatory design. The new PPC was evaluated via field-tests and cold climate chamber tests. The insight into user needs and context of use provided useful input to the design process and contributed to tailored solutions. Providing users with clothing prototypes facilitated participatory design and iterations of design refinement. The group interviews following the final field test showed consensus of enhanced user satisfaction compared to PPC in current use. The final cold chamber test indicated that the new PPC provides sufficient thermal protection during the 60 min of simulated work in a wind-chill temperature of −25°C. Conclusion: Accomplishing a user-centred design process contributed to new PPC with enhanced user satisfaction and included relevant functional solutions.

Meeting end user needs in collaborative medical device technology development research projects: A qualitative case study

The aim of this case study has been to investigate to what extent user centered design (UCD) methodologies have been applied, how the process and outcomes were perceived by project team members, and what were potential barriers towards meeting end user needs. The case studied was the European Union Framework 7 integrated project d-LIVER (2011-2015), which aimed at developing an integrated care system for chronic liver disease patient management. d-LIVER is an example of a public funded, international, multidisciplinary, collaborative research project where development starts from a low technology readiness level, but where research is motivated by societal needs for better health care solutions. Awareness of central end user needs are therefore crucial. 14 project participants were interviewed. To meet societal and end user needs represent a prominent motivation factor for participants. The project organization with only clinical partners interacting with end users was accepted as a fact of life and not as a project pain point. A summary of observations and recommendations for good practice is given.