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Publications (10 of 69) Show all publications
Lind, C. M., Diaz-Olivares, J. A., Lindecrantz, K. & Eklund, J. (2020). A Wearable Sensor System for Physical Ergonomics Interventions Using Haptic Feedback. Sensors, 20(21)
Open this publication in new window or tab >>A Wearable Sensor System for Physical Ergonomics Interventions Using Haptic Feedback
2020 (English)In: Sensors, E-ISSN 1424-8220, Vol. 20, no 21Article in journal (Refereed) Published
Abstract [en]

Work-related musculoskeletal disorders are a major concern globally affecting societies, companies, and individuals. To address this, a new sensor-based system is presented: the Smart Workwear System, aimed at facilitating preventive measures by supporting risk assessments, work design, and work technique training. The system has a module-based platform that enables flexibility of sensor-type utilization, depending on the specific application. A module of the Smart Workwear System that utilizes haptic feedback for work technique training is further presented and evaluated in simulated mail sorting on sixteen novice participants for its potential to reduce adverse arm movements and postures in repetitive manual handling. Upper-arm postures were recorded, using an inertial measurement unit (IMU), perceived pain/discomfort with the Borg CR10-scale, and user experience with a semi-structured interview. This study shows that the use of haptic feedback for work technique training has the potential to significantly reduce the time in adverse upper-arm postures after short periods of training. The haptic feedback was experienced positive and usable by the participants and was effective in supporting learning of how to improve postures and movements. It is concluded that this type of sensorized system, using haptic feedback training, is promising for the future, especially when organizations are introducing newly employed staff, when teaching ergonomics to employees in physically demanding jobs, and when performing ergonomics interventions.

Place, publisher, year, edition, pages
MDPI, 2020
Keywords
smart workwear system, risk assessment, prevention, work technique training, wearable sensors, inertial measurement units, workwear, vibrotactile feedback, musculoskeletal disorders, work postures
National Category
Health Sciences Mechanical Engineering
Identifiers
urn:nbn:se:hb:diva-24802 (URN)10.3390/s20216010 (DOI)000589223200001 ()2-s2.0-85094857822 (Scopus ID)
Available from: 2021-01-25 Created: 2021-01-25 Last updated: 2022-02-10Bibliographically approved
Lind, C. M., Yang, L., Abtahi, F., Hanson, L., Lindecrantz, K., Lu, K., . . . Eklund, J. (2020). Reducing postural load in order picking through a smart workwear system using real-time vibrotactile feedback. Applied Ergonomics, 89
Open this publication in new window or tab >>Reducing postural load in order picking through a smart workwear system using real-time vibrotactile feedback
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2020 (English)In: Applied Ergonomics, ISSN 0003-6870, E-ISSN 1872-9126, Vol. 89Article in journal (Refereed) Published
Abstract [en]

Vibrotactile feedback training may be one possible method for interventions that target at learning better work techniques and improving postures in manual handling. This study aimed to evaluate the short term effect of real-time vibrotactile feedback on postural exposure using a smart workwear system for work postures intervention in simulated industrial order picking. Fifteen workers at an industrial manufacturing plant performed order-picking tasks, in which the vibrotactile feedback was used for postural training at work. The system recorded the trunk and upper arm postures. Questionnaires and semi-structured interviews were conducted about the users’ experience of the system. The results showed reduced time in trunk inclination >= 20 degrees, >= 30 degrees and >= 45 degrees and dominant upper arm elevation >= 30 degrees and >= 45 degrees when the workers received feedback, and for trunk inclination >= 20 degrees, >= 30 degrees and >= 45 degrees and dominant upper arm elevation >= 30 degrees, after feedback withdrawal. The workers perceived the system as useable, comfortable, and supportive for learning. The system has the potential of contributing to improved postures in order picking through an automated short-term training program. 

Place, publisher, year, edition, pages
Elsevier, 2020
Keywords
Work technique training, The smart workwear consortium, Intervention
National Category
Health Sciences
Identifiers
urn:nbn:se:hb:diva-24803 (URN)10.1016/j.apergo.2020.103188 (DOI)000565606900002 ()2-s2.0-85087983143 (Scopus ID)
Available from: 2021-01-25 Created: 2021-01-25 Last updated: 2021-10-21Bibliographically approved
Abtahi, F., Lu, K., Diaz-Olivares, J. A., Forsman, M., Seoane, F. & Lindecrantz, K. (2018). Wearable Sensors Enabling Personalized Occupational Healthcare. In: Ioannis Chatzigiannakis, Yoshito Tobe, Paulo Novais, Oliver Amft (Ed.), Intelligent Environments 2018: (pp. 371-376). Amsterdam: IOS Press
Open this publication in new window or tab >>Wearable Sensors Enabling Personalized Occupational Healthcare
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2018 (English)In: Intelligent Environments 2018 / [ed] Ioannis Chatzigiannakis, Yoshito Tobe, Paulo Novais, Oliver Amft, Amsterdam: IOS Press, 2018, p. 371-376Chapter in book (Other academic)
Abstract [en]

This paper presents needs and potentials for wearable sensors inoccupational healthcare. In addition, it presents ongoing European and Swedishprojects for developing personalized, and pervasive wearable systems for assessingrisks of developing musculoskeletal disorders and cardiovascular diseases at work.Occupational healthcare should benefit in preventing diseases and disorders byproviding the right feedback at the right time to the right person. Collected datafrom workers can provide evidence supporting the ergonomic and industrial tasksof redesigning the working environment to reduce the risks.

Place, publisher, year, edition, pages
Amsterdam: IOS Press, 2018
Series
Ambient Intelligence and Smart Environments ; 23
Keywords
P-Health, Ergonomic, Wearable Technologies
National Category
Occupational Therapy Medical Ergonomics
Research subject
Textiles and Fashion (General)
Identifiers
urn:nbn:se:hb:diva-29646 (URN)10.3233/978-1-61499-874-7-371 (DOI)000482617600045 ()978-1-61499-873-0 (ISBN)978-1-61499-874-7 (ISBN)
Available from: 2023-04-11 Created: 2023-04-11 Last updated: 2024-02-01Bibliographically approved
Abtahi, F., Anund, A., Fors, C., Seoane, F. & Lindecrantz, K. (2017). Association of Drivers’ sleepiness with heart rate variability. A Pilot Study with Drivers on Real Road. In: : . Paper presented at European Medical and Biological Engineering Confernce Nordic-Baltic Conference on Biomedical Engineering and Medical Physics, EMBEC2017 (pp. 149-152). Springer, Singapore
Open this publication in new window or tab >>Association of Drivers’ sleepiness with heart rate variability. A Pilot Study with Drivers on Real Road
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2017 (English)Conference paper, Published paper (Other academic)
Place, publisher, year, edition, pages
Springer, Singapore, 2017
National Category
Electrical Engineering, Electronic Engineering, Information Engineering Other Medical Engineering
Identifiers
urn:nbn:se:hb:diva-13764 (URN)
Conference
European Medical and Biological Engineering Confernce Nordic-Baltic Conference on Biomedical Engineering and Medical Physics, EMBEC2017
Available from: 2018-03-03 Created: 2018-03-03 Last updated: 2018-03-20Bibliographically approved
Ferreira, J., Pau, I., Lindecrantz, K. & Seoane, F. (2016). A handheld and textile-enabled bioimpedance system for ubiquitous body composition analysis.: An initial functional validation. IEEE journal of biomedical and health informatics (99)
Open this publication in new window or tab >>A handheld and textile-enabled bioimpedance system for ubiquitous body composition analysis.: An initial functional validation
2016 (English)In: IEEE journal of biomedical and health informatics, ISSN 2168-2194, E-ISSN 2168-2208, no 99Article in journal (Refereed) Published
Abstract [en]

In recent years, many efforts have been made to promote a healthcare paradigm shift from the traditional reactive hospital-centered healthcare approach towards a proactive, patient-oriented and self-managed approach that could improve service quality and help reduce costs while contributing to sustainability. Managing and caring for patients with chronic diseases accounts over 75% of healthcare costs in developed countries. One of the most resource demanding diseases is chronic kidney disease (CKD), which often leads to a gradual and irreparable loss of renal function, with up to 12% of the population showing signs of different stages of this disease. Peritoneal dialysis and home haemodialysis are life-saving home-based renal replacement treatments that, compared to conventional in-center hemodialysis, provide similar long-term patient survival, less restrictions of life-style, such as a more flexible diet, and better flexibility in terms of treatment options and locations. Bioimpedance has been largely used clinically for decades in nutrition for assessing body fluid distributions. Moreover, bioimpedance methods are used to assess the overhydratation state of CKD patients, allowing clinicians to estimate the amount of fluid that should be removed by ultrafiltration. In this work, the initial validation of a handheld bioimpedance system for the assessment of body fluid status that could be used to assist the patient in home-based CKD treatments is presented. The body fluid monitoring system comprises a custom-made handheld tetrapolar bioimpedance spectrometer and a textile-based electrode garment for total body fluid assessment. The system performance was evaluated against the same measurements acquired using a commercial bioimpedance spectrometer for medical use on several voluntary subjects. The analysis of the measurement results and the comparison of the fluid estimations indicated that both devices are equivalent from a measurement performance perspective, allowing for its use on ubiquitous e-healthcare dialysis solutions.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2016
National Category
Medical Engineering
Research subject
Applied Medical Technology
Identifiers
urn:nbn:se:hb:diva-11673 (URN)10.1109/JBHI.2016.2628766 (DOI)000409521700004 ()2-s2.0-85029926607 (Scopus ID)
Available from: 2017-01-08 Created: 2017-01-08 Last updated: 2018-11-26Bibliographically approved
Wollmann, T., Abtahi, F., Eghdam, A., Seoane, F., Lindecrantz, K., Haag, M. & Koch, S. (2016). User-Centred Design and Usability Evaluation of a Heart Rate Variability Biofeedback Game. IEEE Access, PP(99), 1-1
Open this publication in new window or tab >>User-Centred Design and Usability Evaluation of a Heart Rate Variability Biofeedback Game
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2016 (English)In: IEEE Access, E-ISSN 2169-3536, Vol. PP, no 99, p. 1-1Article in journal (Refereed) Published
Abstract [en]

Background and objective: Reduced heart rate variability (HRV) is an indicatorof a malfunctioning autonomic nervous system. Resonant frequencybreathing is a potential non-invasive means of intervention for improvingthe balance of the autonomic nervous system and increasing HRV. However,such breathing exercises are regarded as boring and monotonous tasks.The use of gaming elements (gamification) or a full gaming experience is awell-recognised method for achieving higher motivation and engagement invarious tasks. However, there is limited documented knowledge on how todesign a game for breathing exercises. In particular, the influence of additionalinteractive elements on the main course of training has not yet beenexplored. In this study, we evaluated the satisfaction levels achieved usingdifferent game elements and how disruptive they were to the main task, i.e.,paced breathing training.

Methods: An Android flight game was developed with three game modes thatdiffer in the degrees of multitasking they require. Design, development and evaluation were conducted using a user-centred approach, including contextanalysis, the design of game principle mock-ups, the selection of game principlesthrough a survey, the design of the game mechanics and GUI mock-up,icon testing and the performance of a summative study through user questionnairesand interviews. A summative evaluation of the developed gamewas performed with 11 healthy participants (ages 40-67) in a controlled setting.Results: The results confirm the potential of video games for motivatingplayers to engage in HRV biofeedback training. The highest training performanceon the first try was achieved through pure visualisation rather thanin a multitasking mode. Players had higher motivation to play the morechallenging game and were more interested in long-term engagement.Conclusion: A framework for gamified HRV biofeedback research is presented.It has been shown that multitasking has considerable influence onHRV biofeedback and should be used with an adaptive challenge level.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2016
Keywords
Autonomic nervous system, Biofeedback, Bioinformatics, Biological control systems, Games, Heart rate variability, Informatics, Multitasking, Patient rehabilitation, Resonant frequency, Consumer Health Informatics (CHI), Exergaming, Gamification for Health, Heart Rate Variability (HRV) Biofeedback, Patient Motivation, Usability
National Category
Human Computer Interaction Other Medical Engineering
Research subject
Medical Technology; Computer Science
Identifiers
urn:nbn:se:hb:diva-11675 (URN)10.1109/ACCESS.2016.2601882 (DOI)000395469000001 ()2-s2.0-85027047802 (Scopus ID)
Available from: 2016-08-30 Created: 2017-01-08 Last updated: 2018-11-30Bibliographically approved
Abtahi, F., Snäll, J., Aslamy, B., Abtahi, S., Seoane, F. & Lindecrantz, K. (2015). Biosignal PI, an Affordable Open-Source ECG and Respiration Measurement System. Sensors, 15(1), 93-109
Open this publication in new window or tab >>Biosignal PI, an Affordable Open-Source ECG and Respiration Measurement System
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2015 (English)In: Sensors, E-ISSN 1424-8220, Vol. 15, no 1, p. 93-109Article in journal (Refereed) Published
Abstract [en]

Bioimedical pilot projects e.g., telemedicine, homecare, animal and human trials usually involve several physiological measurements. Technical development of these projects is time consuming and in particular costly. A versatile but affordable biosignal measurement platform can help to reduce time and risk while keeping the focus on the important goal and making an efficient use of resources. In this work, an affordable and open source platform for development of physiological signals is proposed. As a first step an 8–12 leads electrocardiogram (ECG) and respiration monitoring system is developed. Chips based on iCoupler technology have been used to achieve electrical isolation as required by IEC 60601 for patient safety. The result shows the potential of this platform as a base for prototyping compact, affordable, and medically safe measurement systems. Further work involves both hardware and software development to develop modules. These modules may require development of front-ends for other biosignals or just collect data wirelessly from different devices e.g., blood pressure, weight, bioimpedance spectrum, blood glucose, e.g., through Bluetooth. All design and development documents, files and source codes will be available for non-commercial use through project website, BiosignalPI.org.

Keywords
affordable ECG, Raspberry PI, ADAS1000 analog front-end, open-source, respiration monitoring, thoracic bioimpedance, Medical device development
National Category
Medical Laboratory and Measurements Technologies
Research subject
Människan i vården
Identifiers
urn:nbn:se:hb:diva-8547 (URN)10.3390/s150100093 (DOI)000348309400006 ()25545268 (PubMedID)2-s2.0-84919793163 (Scopus ID)
Available from: 2016-01-14 Created: 2016-01-14 Last updated: 2022-02-10Bibliographically approved
Seoane, F., Atefi, S. R., Tomner, J., Kostulas, K. & Lindecrantz, K. (2015). Electrical Bioimpedance Spectroscopy on Acute Unilateral Stroke Patients: Initial Observations regarding Differences between Sides. BioMed research international, 2015
Open this publication in new window or tab >>Electrical Bioimpedance Spectroscopy on Acute Unilateral Stroke Patients: Initial Observations regarding Differences between Sides
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2015 (English)In: BioMed research international, Vol. 2015Article in journal (Refereed) Published
National Category
Signal Processing Medical Equipment Engineering Neurology
Research subject
Människan i vården
Identifiers
urn:nbn:se:hb:diva-8551 (URN)10.1155/2015/613247 (DOI)000364070700001 ()26557680 (PubMedID)2-s2.0-84947211095 (Scopus ID)
Available from: 2016-01-15 Created: 2016-01-14 Last updated: 2018-12-07Bibliographically approved
Buendia, R., Seoane, F., Lindecrantz, K., Bosaeus, I., Gil-Pita, R., Johannsson, G., . . . Ward, L. (2015). Estimation of body fluids with bioimpedance spectroscopy: state of the art methods and proposal of novel methods. Physiological Measurement, 36(10)
Open this publication in new window or tab >>Estimation of body fluids with bioimpedance spectroscopy: state of the art methods and proposal of novel methods
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2015 (English)In: Physiological Measurement, ISSN 0967-3334, E-ISSN 1361-6579, Vol. 36, no 10Article in journal (Refereed) Published
National Category
Signal Processing Medical Engineering
Research subject
Människan i vården
Identifiers
urn:nbn:se:hb:diva-8552 (URN)10.1088/0967-3334/36/10/2171 (DOI)000367690500013 ()26365469 (PubMedID)2-s2.0-84947596900 (Scopus ID)
Available from: 2016-01-15 Created: 2016-01-14 Last updated: 2018-12-07Bibliographically approved
Abtahi, F., Lu, K., Dizon, M., Johansson, M., Seoane, F. & Lindecrantz, K. (2015). Evaluating Atrial Fibrillation Detection Algorithm based on Heart Rate Variability analysis. In: Medicinteknikdagarna: . Paper presented at Medicinteknikdagarna 2015, Svensk förening för medicinsk teknik och fysik, Uppsala, Oktober 13-14, 2015.. Uppsala: Svensk förening för medicinsk teknik och fysik
Open this publication in new window or tab >>Evaluating Atrial Fibrillation Detection Algorithm based on Heart Rate Variability analysis
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2015 (English)In: Medicinteknikdagarna, Uppsala: Svensk förening för medicinsk teknik och fysik , 2015Conference paper, Poster (with or without abstract) (Refereed)
Place, publisher, year, edition, pages
Uppsala: Svensk förening för medicinsk teknik och fysik, 2015
Keywords
HRV Analysis, Heart Rate
National Category
Medical Engineering
Research subject
Människan i vården
Identifiers
urn:nbn:se:hb:diva-8764 (URN)
Conference
Medicinteknikdagarna 2015, Svensk förening för medicinsk teknik och fysik, Uppsala, Oktober 13-14, 2015.
Available from: 2016-02-03 Created: 2016-02-03 Last updated: 2018-04-05Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0003-4853-7731

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