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  • 1.
    Ehn, Maria
    et al.
    Mälardalens universitet, Akademin för innovation, design och teknik, Inbyggda system.
    Kristoffersson, Annica
    Mälardalens universitet, Akademin för innovation, design och teknik, Inbyggda system.
    Clinical sensor-based fall risk assessment at an orthopedic clinic: A case study of the staff’s views on utility and effectiveness2023Ingår i: Sensors, E-ISSN 1424-8220, Vol. 23, nr 4, artikel-id 1904Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    In-hospital falls are a serious threat to patient security and fall risk assessment (FRA) is important to identify high-risk patients. Although sensor-based FRA (SFRA) can provide objective FRA, its clinical use is very limited and research to identify meaningful SFRA methods is required. This study aimed to investigate whether examples of SFRA methods might be relevant for FRA at an orthopedic clinic. Situations where SFRA might assist FRA were identified in a focus group interview with clinical staff. Thereafter, SFRA methods were identified in a literature review of SFRA methods developed for older adults. These were screened for potential relevance in the previously identified situations. Ten SFRA methods were considered potentially relevant in the identified FRA situations. The ten SFRA methods were presented to staff at the orthopedic clinic, and they provided their views on the SFRA methods by filling out a questionnaire. Clinical staff saw that several SFRA tasks could be clinically relevant and feasible, but also identified time constraints as a major barrier for clinical use of SFRA. The study indicates that SFRA methods developed for community-dwelling older adults may be relevant also for hospital inpatients and that effectiveness and efficiency are important for clinical use of SFRA.

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  • 2.
    Hellström, Per Anders Rickard
    Mälardalens högskola, Akademin för innovation, design och teknik, Inbyggda system.
    Wireless Wearable Measurement System Based on Pedobarography for Monitoring of Health2016Licentiatavhandling, sammanläggning (Övrigt vetenskapligt)
    Abstract [sv]

    Kostnaderna för vår hälsovård har ökat de senaste årtiondena på grund av att vi lever allt längre. Till följd av detta har forskning inom personlig hälsomonitorering (PHM) ökat. PHM medför fördelar såsom rörlighet (hälsoövervakning på jobbet och i hemmet), tidig upptäckt av hälsoproblem medför möjlighet till åtgärd i ett tidigt skede samt en minskning av kostnaderna för hälsovård. Analys av människors rörelser, med hjälp av till exempel tröghetsmätare och pedobarografi, är en viktig underkategori inom PHM. Pedobarografi (PBG) är studien av tryckfält som uppstår på grund av krafter som verkar mellan fotens undersida och en uppbärande yta. Analys av gångstil och kroppshållning, utvärdering av proteser samt monitorering av återhämtning från skada eller sjukdom är exempel på tillämpningar av PBG. Portabel PBG kan exempelvis utföras med hjälp av resistiva kraftsensorer implementerade i skors inläggssulor.

    I överrensstämmelse med detta är målet för forskningen i den här licentiatavhandlingen att designa, bygga och utvärdera ett trådlöst bärbart mätsystem baserat på pedobarografi för övervakning av hälsa. För att uppfylla forskningsmålet utfördes litteraturstudier och problem med existerande skobaserade system identifierades. Tvärsnittsstudier användes vid valideringen. Forskningsområdet är tvärvetenskapligt och omfattar biomedicinska mätningar, elektronik och datavetenskap.

    De främsta vetenskapliga bidragen inkluderar design och implementering av ett pedobarografiskt mätsystem bestående av öppet tillgängliga komponenter, en ny metod för att välja ut uppmätta värden för uppskattning av vikt av buren last under gång, samt en ny analysmetod för gångintensitet med hjälp av kraft-tidsintegraler i stegets avstampsfas. Forskningsresultaten implicerar att det nya pedobarografisystemet, i kombination med de två nya analysmetoderna, är lämpliga att användas i bärbara system för övervakning av hälsa. Mätningar vid personlig hälsomonitorering utförs för att hjälpa till vid beslutsfattande som rör hälsa. Följaktligen strävar framtida forskning mot design av olika beslutsstödsystem.

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  • 3.
    Johnsson, Mikael
    et al.
    Blekinge Tekniska Högskola, Sweden.
    Börell, Pär
    Västerås Science Park, Sweden.
    Key factors for STPs facilitating the establishment of an innovation-advising organization network to support SMEs in developing Industry 4.0 products/services2019Ingår i: The 4th Industrial Revolution: areas of innovation and science parks as key boosters for a successful transition, September 24-27, Nantes, France, 2019Konferensbidrag (Refereegranskat)
    Abstract [en]

    This study explores the role of science and technology parks (STPs) as facilitators in the creation of an innovation-advising organization network (IAON) within the health, social welfare, and medical technology sector (health-tech). The background to this study is that more and more products using Industry 4.0 technology, i.e., robotics, artificial intelligence, and Internet of Things products, are being developed for the health-tech sector, leading to safer and more secure and cost-effective healthcare and social welfare. The challenge, however, as identified by an STP, is that the innovation-advising organizations are not collaborating efficiently, which results in scattered advise to the small and medium-sized enterprise/startups (SME) and an insufficient understanding of each other’s work when advising the same SME. In this study, the STP, successfully, initiated and facilitated the work to develop an IAON. Similar initiatives are suggested. Because challenges and success factors were identified, further studies are also recommended.

  • 4.
    Johnsson, Mikael
    et al.
    Blekinge Tekniska Högskola, Sweden.
    Börell, Pär
    Västerås Science Park, Sweden.
    STPs’ role as facilitators when innovation-advising organizations develop a common quality-assured innovation advising process2019Ingår i: The 4th Industrial Revolution: areas of innovation and science parks as key boosters for a successful transition, 2019Konferensbidrag (Refereegranskat)
    Abstract [en]

    This study explores science and technology parks’ (STP) role as facilitators when an innovation advising organization network (IAON) within the health, social welfare, and medical technology sector (health-tech) develops a quality-assured innovation advising process (QAIP). The background is that more and more products using Industry 4.0 technology are being developed for the health-tech sector. The challenge, however, as recognized by an STP, is that the IAON’s members use individual innovation advise processes, which results in inaccurate advice to the SME and insufficient collaboration between the advising organizations when advising the same SME. In this study, one STP initiated and facilitated the work to develop a QAIP, which was developed stepwise through a series of workshops in an iterative process. This study indicates that STPs may play an active part in supporting IAONs developing specialized innovation processes for certain business and technology areas, although further studies are suggested.

  • 5.
    Johnsson, Mikael
    et al.
    Blekinge Tekniska Högskola, Sweden.
    Börell, Pär
    Västerås Science Park, Sweden.
    Rundkvist, Mats
    Mats Rundkvist Consulting, Sweden.
    How STPs can support the implementation of Industry 4.0-products in the health-tech sector2019Ingår i: The 4th Industrial Revolution: areas of innovation and science parks as key boosters for a successful transition, 2019Konferensbidrag (Refereegranskat)
    Abstract [en]

    This study explores what role science and technology parks (STP) can play when aiming to increase knowledge regarding the implementation of products for the health, social welfare, and medical technology sector (health-tech), including Industry 4.0 technology-based products (products), on a national level in Sweden. Such products, have problems reaching the market due to increased complexity from a purchase perspective. In this study, an STP developed a guideline on implementation-advice based on user-needs, literature studies, and focus groups. The guideline was presented at a seminar, where representatives from all regions in Sweden attended. The STP initiated the project, developed the guideline, and disseminated it successfully at a national level. The guideline was evaluated six months after the seminar, indicating that it created value in practice. This indicates that STPs could take an active role supporting products in the health-tech sector. New seminars are planned, and further studies are suggested.

  • 6.
    Kristoffersson, Annica
    et al.
    Mälardalens högskola, Akademin för innovation, design och teknik, Inbyggda system.
    Du, Jiaying
    Motion Control AB, Sweden.
    Ehn, Maria
    Mälardalens högskola, Akademin för innovation, design och teknik, Inbyggda system.
    Performance and Characteristics of Wearable Sensor Systems Discriminating and Classifying Older Adults According to Fall Risk: A Systematic Review2021Ingår i: Sensors, E-ISSN 1424-8220, Vol. 21, nr 17, artikel-id 5863Artikel, forskningsöversikt (Refereegranskat)
    Abstract [en]

    Sensor-based fall risk assessment (SFRA) utilizes wearable sensors for monitoring individuals’ motions in fall risk assessment tasks. Previous SFRA reviews recommend methodological improvements to better support the use of SFRA in clinical practice. This systematic review aimed to investigate the existing evidence of SFRA (discriminative capability, classification performance) and methodological factors (study design, samples, sensor features, and model validation) contributing to the risk of bias. The review was conducted according to recommended guidelines and 33 of 389 screened records were eligible for inclusion. Evidence of SFRA was identified: several sensor features and three classification models differed significantly between groups with different fall risk (mostly fallers/non-fallers). Moreover, classification performance corresponding the AUCs of at least 0.74 and/or accuracies of at least 84% were obtained from sensor features in six studies and from classification models in seven studies. Specificity was at least as high as sensitivity among studies reporting both values. Insufficient use of prospective design, small sample size, low in-sample inclusion of participants with elevated fall risk, high amounts and low degree of consensus in used features, and limited use of recommended model validation methods were identified in the included studies. Hence, future SFRA research should further reduce risk of bias by continuously improving methodology.

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  • 7.
    Kristoffersson, Annica
    et al.
    Mälardalens högskola, Akademin för innovation, design och teknik, Inbyggda system.
    Lindén, Maria
    Mälardalens högskola, Akademin för innovation, design och teknik, Inbyggda system.
    A Systematic Review on the Use of Wearable Body Sensors for Health Monitoring: A Qualitative Synthesis2020Ingår i: Sensors, E-ISSN 1424-8220, Vol. 20, nr 5, artikel-id 1502Artikel, forskningsöversikt (Refereegranskat)
    Abstract [en]

    The use of wearable body sensors for health monitoring is a quickly growing field with the potential of offering a reliable means for clinical and remote health management. This includes both real-time monitoring and health trend monitoring with the aim to detect/predict health deterioration and also to act as a prevention tool. The aim of this systematic review was to provide a qualitative synthesis of studies using wearable body sensors for health monitoring. The synthesis and analysis have pointed out a number of shortcomings in prior research. Major shortcomings are demonstrated by the majority of the studies adopting an observational research design, too small sample sizes, poorly presented, and/or non-representative participant demographics (i.e., age, gender, patient/healthy). These aspects need to be considered in future research work.

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  • 8.
    Lindén, Maria
    et al.
    Mälardalens högskola, Akademin för innovation, design och teknik.
    Björkman, Mats
    Mälardalens högskola, Akademin för innovation, design och teknik.
    Medicinsk teknik för distribuerad vård2009Konferensbidrag (Refereegranskat)
  • 9.
    Tomasic, Ivan
    et al.
    Mälardalens högskola, Akademin för innovation, design och teknik, Inbyggda system.
    Petrovic, Nikola
    Mälardalens högskola, Akademin för innovation, design och teknik, Inbyggda system.
    Lindén, Maria
    Mälardalens högskola, Akademin för innovation, design och teknik, Inbyggda system.
    Rashkovska, A.
    Jožef Stefan Institute, Department of Communication Systems, Ljubljana, Slovenia.
    Comparison of publicly available beat detection algorithms performances on the ECGs obtained by a patch ECG device2019Ingår i: 2019 42nd International Convention on Information and Communication Technology, Electronics and Microelectronics, MIPRO 2019 - Proceedings, Institute of Electrical and Electronics Engineers Inc. , 2019, s. 275-278Konferensbidrag (Refereegranskat)
    Abstract [en]

    Eight ECG beat detection algorithms, from the PhysioNet's WFDB and Cardiovascular Signal toolboxes, were tested on twenty measurements, obtained by the Savvy patch ECG device, for their accuracy in beat detection. On each subject, one measurement is obtained while sitting and one while running. Each measurement lasted from thirty seconds to one minute. The measurements obtained while running were more challenging for all the algorithms, as most of them almost perfectly detected all the beats on the measurements obtained in sitting position. However, when applied on the measurements obtained while running, all the algorithms have performed with decreased accuracy. Considering overall percentage of the faulty detected peaks, the four best algorithms were jqrs, from the Cardiovascular Signal Toolbox, and ecgpuwave, gqrs, and wqrs, from the WFDB Toolbox, with percentages of faulty detected beats 1.7, 2.3, 2.9, and 3, respectively. 

  • 10.
    Trobec, R.
    et al.
    Department of Communication Systems, Jožef Stefan Institute, Ljubljana, Slovenia.
    Jan, M.
    Department of Cardiovascular Surgery, University Medical Centre, Ljubljana, Slovenia.
    Lindén, Maria
    Mälardalens högskola, Akademin för innovation, design och teknik, Inbyggda system.
    Tomasic, Ivan
    Mälardalens högskola, Akademin för innovation, design och teknik, Inbyggda system.
    Detection and Treatment of Atrial Irregular Rhythm with Body Gadgets and 35-channel ECG2019Ingår i: 2019 42nd International Convention on Information and Communication Technology, Electronics and Microelectronics, MIPRO 2019 - Proceedings, Institute of Electrical and Electronics Engineers Inc. , 2019, s. 301-308Konferensbidrag (Refereegranskat)
    Abstract [en]

    The atrial irregular rhythm, often reflected in atrial fibrillation, undulation or flutter, is recognized as one of the major causes of brain stroke and entails an increased risk of thromboembolic events because it increases the likelihood of blood clots formation. Its early detection is becoming an increasingly important preventive measure. The paper presents a simple methodology for the detection of atrial irregular rhythm by ECG body gadget that can perform long-term measurements, e.g. several weeks or more. Multichannel ECG, on the body surface, gives a more detailed insight into the atrial activity in comparison to standard 12-lead ECG. The information from MECG is compared with single-channel patch ECG. The obtained results suggest that the proposed methodology could be useful in treatments of atrial irregular rhythm. One can obtain a reliable information about the time and duration of fibrillation events, or determine arrhythmic focuses and conductive pathways in heart atria, or study the effects of antiarrhythmic drugs on existing arrhythmias and on an eventual development of new types of arrhythmias. 

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