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Publications (10 of 66) Show all publications
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)
Available from: 2017-01-08 Created: 2017-01-08 Last updated: 2017-11-29Bibliographically 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)
Available from: 2016-08-30 Created: 2017-01-08 Last updated: 2018-01-13Bibliographically 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, ISSN 1424-8220, 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: 2018-01-05Bibliographically 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)
Available from: 2016-01-15 Created: 2016-01-14 Last updated: 2018-04-23Bibliographically 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)
Available from: 2016-01-15 Created: 2016-01-14 Last updated: 2018-06-01Bibliographically 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
Abtahi, F., Lu, K., Dizon, M., Johansson, M., Seoane, F. & Lindecrantz, K. (2015). Evaluation of Atrial Fibrillation Detection by using Heart Rate Variability analysis. In: : . Paper presented at Annual I-Pack KTH - VINNOVA Excellence Research Center.
Open this publication in new window or tab >>Evaluation of Atrial Fibrillation Detection by using Heart Rate Variability analysis
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2015 (English)Conference paper, Poster (with or without abstract) (Other academic)
Keywords
HRV Analysis, Heart Rate
National Category
Medical Engineering
Research subject
Människan i vården
Identifiers
urn:nbn:se:hb:diva-8767 (URN)
Conference
Annual I-Pack KTH - VINNOVA Excellence Research Center
Available from: 2016-02-03 Created: 2016-02-03 Last updated: 2018-04-18Bibliographically approved
Abtahi, F., Ji, G., Lu, K., Rödby, K., Björlin, A., Östlund, A., . . . Lindecrantz, K. (2015). Textile-Electronic Integration in Wearable Measurement Garments for Pervasive Healthcare Monitoring. In: : . Paper presented at Annual I-Pack KTH- VINNOVA Excellence Center Workshop.
Open this publication in new window or tab >>Textile-Electronic Integration in Wearable Measurement Garments for Pervasive Healthcare Monitoring
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2015 (English)Conference paper, Poster (with or without abstract) (Other academic)
Keywords
Intarsia, Textile-electronic integration Wearable measurements systems
National Category
Medical Laboratory and Measurements Technologies Textile, Rubber and Polymeric Materials
Research subject
Människan i vården
Identifiers
urn:nbn:se:hb:diva-8766 (URN)
Conference
Annual I-Pack KTH- VINNOVA Excellence Center Workshop
Available from: 2016-01-14 Created: 2016-02-03 Last updated: 2018-04-24Bibliographically approved
Abtahi, F., Aslamy, B., Boujabir, I., Seoane, F. & Lindecrantz, K. (2014). An Affordable ECG and Respiration Monitoring System Based on Raspberry PI and ADAS1000: First Step towards Homecare Applications. In: Mindedal H., Persson M. (Ed.), 16th Nordic-Baltic Conference on Biomedical Engineering: . Paper presented at 16th Nordic-Baltic Conference on Biomedical Engineering, Gothenburg, 14-16 October, 2014 (pp. 5-8). Springer International Publishing
Open this publication in new window or tab >>An Affordable ECG and Respiration Monitoring System Based on Raspberry PI and ADAS1000: First Step towards Homecare Applications
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2014 (English)In: 16th Nordic-Baltic Conference on Biomedical Engineering / [ed] Mindedal H., Persson M., Springer International Publishing , 2014, p. 5-8Conference paper, Published paper (Refereed)
Abstract [en]

Homecare is a potential solution for problems associated with an aging population. This may involve several physiological measurements, and hence a flexible but affordable measurement device is needed. In this work, we have designed an ADAS1000-based four-lead electrocardiogram (ECG) and respiration monitoring system. It has been implemented using Raspberry PI as a platform for homecare applications. ADuM chips based on iCoupler technology have been used to achieve electrical isolation as required by IEC 60601 and IEC 60950 for patient safety. The result proved the potential of Raspberry PI for the design of a compact, affordable, and medically safe measurement device. Further work involves developing a more flexible software for collecting measurements from different devices (measuring, e.g., blood pressure, weight, impedance spectroscopy, blood glucose) through Bluetooth or user input and integrating them into a cloud-based homecare system.

Place, publisher, year, edition, pages
Springer International Publishing, 2014
Series
IFMBE Proceedings, ISSN 1680-0737 ; 48
Keywords
homecare, personalized healthcare, Biomedical Engineering
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Integrated Caring Science
Identifiers
urn:nbn:se:hb:diva-7346 (URN)10.1007/978-3-319-12967-9_2 (DOI)2320/14677 (Local ID)978-3-319-12967-9 (ISBN)978-3-319-12967-9 (ISBN)2320/14677 (Archive number)2320/14677 (OAI)
Conference
16th Nordic-Baltic Conference on Biomedical Engineering, Gothenburg, 14-16 October, 2014
Available from: 2015-12-22 Created: 2015-12-22 Last updated: 2017-11-09Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0003-4853-7731

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