Design and Evaluation of Novel Textile Wearable Systems for the Surveillance of Vital Signals

Trindade, Isabel; Silva, José Machado da; Miguel, Rui; Pereira, Madalena; Lucas, José; Oliveira, Luís; Valentim, Bruno; Barreto, Jorge; Silva, Manuel F.

doi:10.20944/preprints201609.0079.v1

Cited by 19 publications

(5 citation statements)

References 17 publications

(25 reference statements)

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“…Currently, several studies are considering the introduction of personal wearable pollution devices [ 156 ] that embed some sensors for environmental parameters, cardio and respiratory signals of users, pollution concentrations (as the pump test), etc. [ 157 ]. New frontiers can consider personal devices, near the breathing zone of the user, that assess chemical and biological pollutant levels.…”

Section: Human Presence and Medical Activitiesmentioning

confidence: 99%

Indoor Air Quality in Inpatient Environments: A Systematic Review on Factors that Influence Chemical Pollution in Inpatient Wards

Gola

Settimo

Capolongo

2019

Journal of Healthcare Engineering

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Introduction. Indoor air quality is one the main issues in which governments are focusing. In healing spaces, several research studies are reporting a growing number of data analysis and research works in order to guarantee and prevent health of users and workers. Currently the main investigations are about biological and physical risks; otherwise chemical ones are less investigated. Several countries are carrying out indoor air quality monitoring in those professional workplaces in which chemicals are used but also in some typically indoor (generic) spaces for the building hygiene assessment. The indoor air is affected by several factors that currently are analyzed punctually, without a whole scenario of all the variable performances. The authors have done a systematic review on the current state of the art and knowledge related to chemical pollution in healing spaces and the emerging strategies, supported by scientific literature, for healthy inpatient rooms and their indoor air. Methodology. The systematic review has been done through the analysis of papers from SCOPUS, DOAJ, and PubMed databases. The survey sample considered 483 scientific articles, between 1989 and 2017, and starting the systematic reading and analysis of the abstracts, only 187 scientific papers were selected, and only 96 were accessible. Discussion. Since scientific literature reports very different outputs and results, the resulting work from the survey is divided into specific fields of interest related to construction and finishing materials, installations, components, ventilation systems, processes, etc. Starting from the systematic reading, the paper classifies the factors of indoor air in four macroareas: outdoor air and microclimatic factors (temperature, relative humidity, air velocity, air change, etc.); management activities (management and maintenance activities, ventilation systems, HVAC, cleaning and disinfectant activities, etc.); design factors (room dimensions, furniture, finishing materials, etc.); and human presence and medical activities (users’ presence, their health status, and medical activities carried out in inpatient rooms). Conclusion. The systematic review gives rise to a broad scenario on the existing knowledge regarding the indoor air pollution, design, and management strategies for healthy spaces and several emerging topics. Although the aim of the investigation is strictly related to chemical pollution, several considerations from the biological point of view have been listed. The systematic review, supported by the existing scientific literature, becomes a starting point for considering the importance of the topic and to stimulate the knowledge around this field of interest for improving studies, analysis, and simulations.

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Section: Human Presence and Medical Activitiesmentioning

confidence: 99%

Indoor Air Quality in Inpatient Environments: A Systematic Review on Factors that Influence Chemical Pollution in Inpatient Wards

Gola

Settimo

Capolongo

2019

Journal of Healthcare Engineering

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“…The later causing unstable impedance measurements; thus, making commercial electrodes unsuitable for long term applications. Such issues have been resolved with the research and development of dry electrodes in the form of membranes [32,[40][41][42][43][44][45][46][47][48][49][50][51], drying paste membranes [52], tattoos [53,54] and textiles [55][56][57][58][59][60][61][62][63][64][65][66][67][68][69][70][71]. However, dry electrodes are challenged with the issue of polarizing impedance.…”

Section: Biopotential Electrodesmentioning

confidence: 99%

Embroidered electrodes for bioelectrical impedance analysis: impact of surface area and stitch parameters

Logothetis

Fernández‐García

Troynikov

et al. 2019

Meas. Sci. Technol.

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Measuring electrical activity in the human body is vital in the diagnosis and monitoring of patients; thus, attention to the design of biopotential electrodes is essential. It is important that electrodes are designed accordingly by adapting to a specific device and application. By embroidering electrodes, we can tailor the electrode parameters to suit the application and integrate them into textile outfits. However, embroidered electrodes possess unwanted polarizing impedance () relative to the frequency of the current applied by the system. Dry embroidered electrodes are preferred to wet electrodes for bioelectrical impedance analysis (BIA) recordings providing stable measurements. BIA is a relatively simple and non-invasive technique that measures the resistivity of biological tissue. This research analyzes the impact of embroidery characteristics (i.e. electrode surface area, stitch type, stitch density and stitch length) on embroidered electrodes by identifying the parameters reducing for BIA in a dry and wet state. In addition, the influence of the amount of conductive thread utilised for the fabrication of the sample electrodes was studied. For dry electrodes, we identified that a larger electrode surface area, increased stitch length and stitch density reduce . Moreover, it was observed that potentially there is a threshold on the amount of conductive yarn used for the embroidered electrode. In contrary, wet electrodes displayed irregular and thus, it can be concluded that they could potentially impair BIA measurements. In essence, our findings show that embroidered electrodes can be incorporated into wearable BIA systems for health monitoring in home settings.

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“…Among the different methods to create e-textiles, embroidery is one of the most preferred ways because the technique allows for flexible patterns [10,11], dimensional accuracy, mass production, and cost-effective production. Therefore, embroidery has been widely used to create high-performance textile electrodes [12][13][14][15], circuits [16,17] and sensors [18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Performance evaluation of conductive tracks in fabricating e-textiles by lock-stitch embroidery

Zheng

et al. 2020

Journal of Industrial Textiles

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Lock-stitch embroidery has been the centre of much interest as a versatile and precise method of producing conductive tracks in the fabrication of wearable electronic devices. However, improper fabrication parameter settings could result in the nonconformity of the conductive tracks and damage the conductive coating of the conductive yarns. In this study, we evaluate the appearance quality, dimensional stability and electrical resistance of conductive tracks by taking into account the embroidering speed (ES), stitch length (SL), needle thread pre-tension (NTP) and embroidering direction (ED). The conductive tracks are embroidered onto knitted fabric in different directions with silver-coated polyamide yarn as the needle thread. The results show that stitching the conductive tracks in the wale direction results in a more uniform stitch lines in comparison to the other directions. To resolve the problem of floated stitches, it is recommended that an SL of 4 mm and a higher NTP are used. The percentage of shrinkage in the wale direction is lower than in the course direction. The electrical resistance of the conductive tracks increases with a higher ES and shorter SL. It is also found that a thicker yarn is more sensitive to the NTP and some of the silver coating is rubbed off with an NTP of 50 gf. We also carry out an overlay plot analysis, through which we predict and validate the optimal embroidery parameters that balance appearance quality and electrical resistance. The technique parameters in this study can be used to embroider conductive tracks for smart clothing.

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Design and Evaluation of Novel Textile Wearable Systems for the Surveillance of Vital Signals

Cited by 19 publications

References 17 publications

Indoor Air Quality in Inpatient Environments: A Systematic Review on Factors that Influence Chemical Pollution in Inpatient Wards

Indoor Air Quality in Inpatient Environments: A Systematic Review on Factors that Influence Chemical Pollution in Inpatient Wards

Embroidered electrodes for bioelectrical impedance analysis: impact of surface area and stitch parameters

Performance evaluation of conductive tracks in fabricating e-textiles by lock-stitch embroidery

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