Smart technical textiles with integrated POF sensors

Krebber, Katerina; Lenke, Philipp; Liehr, Sascha; Witt, J.; Schukar, Marcus

doi:10.1117/12.776758

Cited by 24 publications

(16 citation statements)

References 15 publications

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“…The largest group of publications has been presented by the research team that worked on the OFSETH project. [27][28][29][30][31][32][33][34][35] They developed three different fiber-optic designs, all textile-based: an FBG sensor, a macrobending sensor, and an optical time domain reflectometry sensor. Their sensors measure elongations of the abdominal circumference during breathing movements and target the monitoring of sedated or anaesthetized patients under MRI.…”

Section: Discussionmentioning

confidence: 99%

“…Similar techniques for breath detection have been demonstrated by other groups, but their sensors are embedded into special textile belts or vests to be fixed to the monitored person's body. [27][28][29][30][31][32][33][34][35][36][37][38][39] The sensor proposed in this paper is configured for measurements that do not require any special wearable textiles, thereby avoiding the need to carry out processes for preparing the patient for monitoring. The solution closest to the proposed sensor is one comprising a 12-element FBG array embedded into a bed, 40 although only laboratory trials evaluating the RR detection have been carried out so far.…”

Section: Introductionmentioning

confidence: 99%

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Fiber Bragg grating-based sensor for monitoring respiration and heart activity during magnetic resonance imaging examinations

et al. 2013

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Abstract. We present a fiber-optic sensor for monitoring respiration and heart activity designed to operate in the magnetic resonance imaging (MRI) environment. The sensor employs a Plexiglas springboard, which converts movements of the patient's body lying on the board (i.e., lung-and heart-induced vibrations) to strain, where a fiber Bragg grating attached to the board is used to measure this strain. Experimental studies are carried out during thoracic spine MRI examinations. The presence of the metal-free sensor construction in the MRI environment does not pose a threat to the patient and has no influence over the quality of imaging, and the signal is identical to that obtained without any electromagnetic interference. The results show that the sensor is able to accurately reflect the ballistocardiographic signal, enabling determinations of the respiration rate (RR) and heart rate (HR). The data delivered by the sensor are normally distributed on the Bland-Altman plot for the characteristic point determination and exhibit clear dependence on the RR and HR values for the RR and HR determinations, respectively. Measurement accuracies are better than 7% of the average values, and thus, with further development, the sensor will be implemented in routine MRI examinations.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fiber Bragg grating-based sensor for monitoring respiration and heart activity during magnetic resonance imaging examinations

et al. 2013

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“…[96][97][98][99][100][101]114 Figure 14 illustrates a basic system employing a POF-OTDRtype sensor for respiration monitoring. The preliminary results show sufficient sensitivity for detecting respiratory movements, i.e., cyclic strain between 0 and 3%.…”

Section: Optical Time Domain Reflectometry Based Sensorsmentioning

confidence: 99%

“…The literature provides a number of descriptions in which a single FBG [115][116][117][118] or multiple FBGs [97][98][99][100][101][102][103][104][105][106]114,[119][120][121][122][123] act as the main sensing elements for acquiring body movements caused by respiratory and/or heart function. In both cases, FBGs can be embedded in the clothing worn by the patient during monitoring [97][98][99][100][101][102][103][104][105][106][115][116][117][118][119][120][121][122] or mounted in the bed on which the person lies, as shown in Fig.…”

Section: Literature Explorationmentioning

confidence: 99%

Fiber-optic sensors for monitoring patient physiological parameters: a review of applicable technologies and relevance to use during magnetic resonance imaging procedures

Dziuda

2015

J. Biomed. Opt.

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Abstract. The issues involved with recording vital functions in the magnetic resonance imaging (MRI) environment using fiber-optic sensors are considered in this paper. Basic physiological parameters, such as respiration and heart rate, are fundamental for predicting the risk of anxiety, panic, and claustrophobic episodes in patients undergoing MRI examinations. Electronic transducers are generally hazardous to the patient and are prone to erroneous operation in heavily electromagnetically penetrated MRI environments; however, nonmetallic fiberoptic sensors are inherently immune to electromagnetic effects and will be crucial for acquiring the abovementioned physiological parameters. Forty-seven MRI-tested or potentially MRI-compatible sensors have appeared in the literature over the last 20 years. The author classifies these sensors into several categories and subcategories, depending on the sensing element placement, method of application, and measurand type. The author includes five in-house-designed fiber Bragg grating based sensors and shares experience in acquiring physiological measurements during MRI scans. This paper aims to systematize the knowledge of fiber-optic techniques for recording life functions and to indicate the current directions of development in this area.

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“…Finally, geotextiles integrating polymer optical fibres (POFs) [152,153] and interrogated using ν-OTDR and I-OFDR were also proposed for the monitoring of embankments [154]. Figure 12 shows some samples of geotextiles with embedded fibres.…”

Section: Distributed Strain Sensing For Soil Levees and Embankmentsmentioning

confidence: 99%

A Review of Distributed Fibre Optic Sensors for Geo-Hydrological Applications

2017

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Featured Application: Distributed fibre optic sensors for geo-hydrological applications: a comprehensive review about methodology, weaknesses, and strengths.Abstract: Distributed optical fibre sensing, employing either Rayleigh, Raman, or Brillouin scattering, is the only physical-contact sensor technology capable of accurately estimating physical fields with spatial continuity along the fibre. This unique feature and the other features of standard optical fibre sensors (e.g., minimal invasiveness and lightweight, remote powering/interrogating capabilities) have for many years promoted the technology to be a promising candidate for geo-hydrological monitoring. Relentless research efforts are being undertaken to bring the technology to complete maturity through laboratory, physical models, and in-situ tests. The application of distributed optical fibre sensors to geo-hydrological monitoring is here reviewed and discussed, along with basic principles and main acquisition techniques. Among the many existing geo-hydrological processes, the emphasis is placed on those related to soil levees, slopes/landslide, and ground subsidence that constitute a significant percentage of current geohazards.

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Smart technical textiles with integrated POF sensors

Cited by 24 publications

References 15 publications

Fiber Bragg grating-based sensor for monitoring respiration and heart activity during magnetic resonance imaging examinations

Fiber Bragg grating-based sensor for monitoring respiration and heart activity during magnetic resonance imaging examinations

Fiber-optic sensors for monitoring patient physiological parameters: a review of applicable technologies and relevance to use during magnetic resonance imaging procedures

A Review of Distributed Fibre Optic Sensors for Geo-Hydrological Applications

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