Change search
Refine search result
1 - 10 of 10
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Rows per page
  • 5
  • 10
  • 20
  • 50
  • 100
  • 250
Sort
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
Select
The maximal number of hits you can export is 250. When you want to export more records please use the Create feeds function.
  • 1.
    Ferreira Gonzalez, Javier
    University of Borås, School of Engineering.
    Textile-enabled Bioimpedance Instrumentation for Personalised Health Monitoring Applications2013Licentiate thesis, monograph (Other academic)
    Abstract [en]

    A growing number of factors, including the costs, technological advancements, an ageing population, and medical errors are leading industrialised countries to invest in research on alternative solutions to improving their health care systems and increasing patients’ life quality. Personal Health System (PHS) solutions envision the use of information and communication technologies that enable a paradigm shift from the traditional hospital-centred healthcare delivery model toward a preventive and person-centred approach. PHS offers the means to follow patient health using wearable, portable or implantable systems that offer ubiquitous, unobtrusive bio-data acquisition, allowing remote access to patient status and treatment monitoring.Electrical Bioimpedance (EBI) technology is a non-invasive, quick and relatively affordable technique that can be used for assessing and monitoring different health conditions, e.g., body composition assessments for nutrition. EBI technology combined with state-of-the-art advances in sensor and textile technology are fostering the implementation of wearable bioimpedance monitors that use functional garments for the implementation of personalised healthcare applications.This research studies the development of a portable EBI spectrometer that can use dry textile electrodes for the assessment of body composition for the purposes of clinical uses. The portable bioimpedance monitor has been developed using the latest advances in system-on-chip technology for bioimpedance spectroscopy instrumentation. The obtained portable spectrometer has been validated against commercial spectrometer that performs total body composition assessment using functional textrode garments.The development of a portable Bioimpedance spectrometer using functional garments and dry textile electrodes for body composition assessment has been shown to be a feasible option. The availability of such measurement systems bring closer the real implementation of personalised healthcare systems.

  • 2.
    Ferreira Gonzalez, Javier
    et al.
    University of Borås, School of Engineering.
    Seoane, Fernando
    University of Borås, School of Engineering.
    Lindecrantz, Kaj
    University of Borås, School of Engineering.
    AD5933-Based Electrical Bioimpedance Spectrometer. Towards Textile-Enabled Applications.2011Conference paper (Refereed)
  • 3.
    Ferreira, Javier
    et al.
    University of Borås, School of Engineering.
    Seoane, Fernando
    University of Borås, School of Engineering.
    Ansede, Antonio
    Bragos, Ramon
    AD5933-based Spectrometer for Electrical Bioimpedance Applications2010In: Journal of Physics: Conference Series, Institute of Physics Publishing Ltd. , 2010Conference paper (Refereed)
    Abstract [en]

    To build an Electrical Bioimpedance (EBI) spectrometer using the Impedance Measurement System-On-Chip AD5933 together with a 4-Electrode Analog Front End (4E-AFE) has been proven practicable. Such small measurement devices can make possible several new applications of EBI technology, especially when combined with functional textiles, which can enable wearable applications for personal health and home monitoring. After the implementation and functional validation of the 4E-AFE-enabled spectrometer, the next natural step is to validate for which EBI applications the 4E-AFE-enabled system is suitable. To test the applicability of this novel spectrometer on several EBI applications, 2R1C equivalents models have been experimentally obtained and impedance spectroscopy measurements have been performed with the system under study and with the SFB7 EBI spectrometer manufactured by ImpediMed. The 2R1C circuit parameters have been estimated with the BioImp software from the spectra obtained with both EBI spectrometers and the estimated values have been compared with the original values used in each circuit model implementation. The obtained results indicated that the 4E-AFE-enabled system cannot beat the performance of the SFB7 in accuracy but it performs better in preciseness. In any case the overall performance indicates that the 4E-AFE-enabled system can perform spectroscopy measurements in the frequency range from 5 to 100 kHz.

  • 4. Márquez, Juan Carlos
    et al.
    Ferreira, Javier
    University of Borås, School of Engineering.
    Seoane, Fernando
    University of Borås, School of Engineering.
    Textile Electrode Straps for Wrist-to-Ankle Bioimpedance Measurements for Body Composition Analysis. Initial Validation & Experimental Results2010In: Proceedings of the 32nd Annual International Conference of the IEEE Engineering in Medicine and Biology Society"Merging Medical Humanism and Technology", 2010Conference paper (Refereed)
    Abstract [en]

    Electrical Bioimpedance (EBI) is one of the non-invasive monitoring technologies that could benefit from the emerging textile based measurement systems. If reliable and reproducible EBI measurements could be done with textile electrodes, that would facilitate the utilization of EBI-based personalized healthcare monitoring applications. In this work the performance of a custom-made dry-textile electrode prototype is tested. Four-electrodes ankle-to-wrist EBI measurements have been taken on healthy subjects with the Impedimed spectrometer SFB7 in the frequency range 5 kHz to 1 MHz. The EBI spectroscopy measurements taken with dry electrodes were analyzed via the Cole and Body Composition Analysis (BCA) parameters, which were compared with EBI measurements obtained with standard electrolytic electrodes. The analysis of the obtained results indicate that even when dry textile electrodes may be used for EBI spectroscopy measurements, the measurements present remarkable differences that influence in the Cole parameter estimation process and in the final production of the BCA parameters. These initial results indicate that more research work must be done to in order to obtain a textile-based electrode that ensures reliable and reproducible EBI spectroscopy measurements.

  • 5.
    Seoane, Fernando
    et al.
    University of Borås, School of Engineering.
    Ferreira, Javier
    University of Borås, School of Engineering.
    Buendia, Ruben
    University of Borås, School of Engineering.
    Lindecrantz, Kaj
    University of Borås, School of Engineering.
    Adaptive Frequency Distribution for Electrical Bioimpedance Spectroscopy Measurements2012Conference paper (Refereed)
    Abstract [en]

    This paper presents a novel frequency distribution scheme intended to provide more accurate estimations of Cole parameters. Nowadays a logarithmic frequency distribution is mostly used in Electrical Bioimpedance Spectroscopy (EBIS) applications. However it is not optimized following any criterion. Our hypothesis is that an EBIS signal contains more information where the variation of the measurement regarding the frequency is larger; and that there ought to be more measuring frequencies where there is more information. Results show that for EBIS data with characteristic frequencies up to 200 kHz the error obtained with both frequency distribution schemes is similar. However, for EBIS data with higher values of characteristic frequency the error produced when estimating the values from EBIS measurements using an adaptive frequency distribution is smaller. Thus it may usefull for EBIS applications with high values of characteristic frequency, e.g. cerebral bioimpedance.

  • 6.
    Seoane, Fernando
    et al.
    University of Borås, School of Engineering.
    Ferreira, Javier
    University of Borås, School of Engineering.
    Marquez, Juan Carlos
    University of Borås, School of Engineering.
    Skrifvars, Mikael
    University of Borås, School of Engineering.
    Conductive Polymer Films as Textrodes for Biopotential Sensing2011Conference paper (Other academic)
    Abstract [en]

    Introduction: After several years of progresses in textile technology and wearable measurement instrumentation, applications of wearable textile-electronics systems are arising providing a stable background for commercial applications. So far, the available commercial solutions are centered on fitness applications and mostly based in the acquisition of heart rate through Textile Electrodes (Textrodes) based on metallic threads or on conductive rubber compounds. Methods and Materials: In this work a novel material approach is presented to produce Textrodes for acquisition of Electrocardiographic (ECG) signals using a conductive polypropylene (PP1386 from Premix, Finland) polymer material. The polymer was film extruded into thin films, and used as such in the Textrode. Conductive Polymer Films (CPF) have been used to produce Textrodes, and its measurement performance has been compared with the ECG signals obtained with commercial Textrode fabrics and conventional Ag/AgCl electrodes. In order to set up the same measurement conditions, a chest strap tailored to host the testing electrodes has been used. Results: The close resemblance of the ECG acquired with the textile fabric electrodes, the Ag/AgCl electrodes and the PP1386 CPF electrodes suggest that the Polymer Electrodes PP1386 are a feasible alternative to the current textile fabrics that use silver thread as conductive material and also to conductive rubber material. Discussion & Conclusion: The availability of the Conductive Polymer Electrode PP1386 in a film form allows the manufacturing of electrodes by conventional textile processes, like lamination or sewing, therefore facilitating the transition from lab prototyping to industrial manufacturing. Replacing the traditional silver thread as conductive element in the fabrication of Textrodes will definitely reduce the material cost per Textrode. Biocompatibility issues and manufacturability issues must be addressed but the exhibited functional performance is showing encouraging results.

  • 7.
    Seoane, Fernando
    et al.
    University of Borås, School of Engineering.
    Gawel, J
    Ferreira, J.
    University of Borås, School of Engineering.
    Wirstrand, J.
    Stretchable Circuit Board Technology enabling Seamless Textile-Electronic Integration for Electrical Muscle Stimulation Therapy2012Conference paper (Refereed)
  • 8.
    Seoane, Fernando
    et al.
    University of Borås, School of Engineering.
    Mohino-Herranz, Inmaculada
    Ferreira González, Javier
    University of Borås, School of Engineering.
    Alvarez, Lorena
    Buendia, Ruben
    Ayllón, David
    Cosme, Llerena
    Gil-Pita, Roberto
    Wearable Biomedical Measurement Systems for Assessment of Mental Stress of Combatants in Real Time2014In: Sensors, ISSN 1424-8220, E-ISSN 1424-8220, Vol. 14, no 4, p. 7120-7141Article in journal (Refereed)
    Abstract [en]

    The Spanish Ministry of Defense, through its Future Combatant program, has sought to develop technology aids with the aim of extending combatants' operational capabilities. Within this framework the ATREC project funded by the “Coincidente” program aims at analyzing diverse biometrics to assess by real time monitoring the stress levels of combatants. This project combines multidisciplinary disciplines and fields, including wearable instrumentation, textile technology, signal processing, pattern recognition and psychological analysis of the obtained information. In this work the ATREC project is described, including the different execution phases, the wearable biomedical measurement systems, the experimental setup, the biomedical signal analysis and speech processing performed. The preliminary results obtained from the data analysis collected during the first phase of the project are presented, indicating the good classification performance exhibited when using features obtained from electrocardiographic recordings and electrical bioimpedance measurements from the thorax. These results suggest that cardiac and respiration activity offer better biomarkers for assessment of stress than speech, galvanic skin response or skin temperature when recorded with wearable biomedical measurement systems.

  • 9.
    Seoane Martínez, Fernando
    et al.
    University of Borås, School of Engineering.
    Marquez, J. C.
    University of Borås, School of Engineering.
    Ferreira, Javier
    University of Borås, School of Engineering.
    Buendia, Ruben
    University of Borås, School of Engineering.
    Lindecrantz, Kaj
    University of Borås, School of Engineering.
    The Challenge of the Skin-Electrode Contact in Textile-enabled Electrical Bioimpedance Measurements for Personalized Healthcare Monitoring Applications2011In: Biomedical Engineering, Trends in Materials Science / [ed] AN Laskovski, InTech , 2011Chapter in book (Other academic)
    Abstract [en]

    Textile technology has gone through a remarkable development in the field of Smart Textiles and more specifically in the area of conductive fabrics and yarns. Important research efforts have been done worldwide and especially in Europe, where the EUcommission has supported several research projects in the near past e.g. BIOTEX IST-2004- 016789, CONTEXT IST- 2004-027291 and MyHeart IST-2002-507816. As a result of such worldwide R&D efforts, textile sensors and electrodes are currently available commercially. Nowadays there are even consumer products with textile sensing technology for heart rate monitoring integrated in the apparel e.g. Adistar Fusion T-shirt from Adidas or the Numetrex’s Cardio shirt. Since one of the main areas of focus where R&D efforts have been concentrated is Personalized Healthcare Monitoring (PHM) and the fact that most of the efforts developing textile sensors have been focused on developing electrodes for biopotential signals recording, it is natural that the main targeted application has been the acquisition of electrical biopotentials and especially monitoring the ElectroCardioGraphic activity, but also other types of textile sensors have been investigated e.g. textile stretching sensor (Mattmann et al., 2008). Nowadays textile-enable stretch sensors are available commercially like the one manufactured by Merlin Systems. While the application of this type of sensor aims at other applications than biopotential recordings, an important area of application of stretch sensors still is PHM and fitness. This type of sensors can be used for respiration monitoring or plethysmography applications.

  • 10.
    Seoane Martínez, Fernando
    et al.
    University of Borås, School of Engineering.
    Marquez, J. C.
    Ferreira, Javier
    University of Borås, School of Engineering.
    Buendia, Ruben
    University of Borås, School of Engineering.
    Lindecrantz, Kaj
    University of Borås, School of Engineering.
    The Challenge of the Skin-Electrode Contact in Textile-enabled Electrical Bioimpedance Measurements for Personalized Healthcare Monitoting Application2010Conference paper (Refereed)
1 - 10 of 10
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf