Interferometric Fiber Optics Based Sensor for Monitoring of the Heart Activity

Życzkowski, M.; Szustakowski, Mieczysław; Ciurapiński, W.; Uziębło‐Życzkowska, Beata

doi:10.12693/aphyspola.120.782

Cited by 12 publications

(8 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[14][15][16][17][18][19] The lung-and heart-induced body movements cause phase changes between the input and output signals and further generate a time-varying serial pattern of fringes. A major disadvantage of this measuring method is the necessity of using sophisticated signal analysis in order to detect breathing and cardiac activity.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2013

View full text Add to dashboard Cite

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.

show abstract

Section: Introductionmentioning

confidence: 99%

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

et al. 2013

View full text Add to dashboard Cite

show abstract

“…In Table 6 we start by reviewing a work on an interferometer-type fiber sensor where different configurations of the same for monitoring psychophysical activity were compared to sample HR, motion, and blood pressure, performing measurements on the human body [ 118 ]. That study is followed by a proposed noninvasive OF sensor to monitor respiration, blood pressure, and movement with drugs on the human body through a chair with a backrest and a pillow where it carried the sensor [ 119 ].…”

Section: Health Field Sensingmentioning

confidence: 99%

Fiber Optic Sensors for Vital Signs Monitoring. A Review of Its Practicality in the Health Field

et al. 2021

View full text Add to dashboard Cite

Vital signs not only reflect essential functions of the human body but also symptoms of a more serious problem within the anatomy; they are well used for physical monitoring, caloric expenditure, and performance before a possible symptom of a massive failure—a great variety of possibilities that together form a first line of basic diagnosis and follow-up on the health and general condition of a person. This review includes a brief theory about fiber optic sensors’ operation and summarizes many research works carried out with them in which their operation and effectiveness are promoted to register some vital sign(s) as a possibility for their use in the medical, health care, and life support fields. The review presents methods and techniques to improve sensitivity in monitoring vital signs, such as the use of doping agents or coatings for optical fiber (OF) that provide stability and resistance to the external factors from which they must be protected in in vivo situations. It has been observed that most of these sensors work with single-mode optical fibers (SMF) in a spectral range of 1550 nm, while only some work in the visible spectrum (Vis); the vast majority, operate through fiber Bragg gratings (FBG), long-period fiber gratings (LPFG), and interferometers. These sensors have brought great advances to the measurement of vital signs, especially with regard to respiratory rate; however, many express the possibility of monitoring other vital signs through mathematical calculations, algorithms, or auxiliary devices. Their advantages due to miniaturization, immunity to electromagnetic interference, and the absence of a power source makes them truly desirable for everyday use at all times.

show abstract

“…[56][57][58][59][60][61][62][63][64][65][66][67][68][69][70][71][72][73][74][75] Body movements caused by the function of the lungs and heart cause phase changes between signals (sensing and reference) and could be identified as a series of time-variable interference patterns. Thus far, in research on the acquisition of physiological signals, fiber-optic interferometers have been tested in their most popular configurations, i.e., Michelson, Mach-Zehnder, and Sagnac interferometers.…”

Section: Interferometric Fiber-optic Sensorsmentioning

confidence: 99%

“…Thus far, in research on the acquisition of physiological signals, fiber-optic interferometers have been tested in their most popular configurations, i.e., Michelson, Mach-Zehnder, and Sagnac interferometers. [58][59][60] The popular Michelson interferometer has been the most widely studied. [61][62][63][64][65][66][67][68][69][70][71][72] As shown in Fig.…”

Section: Interferometric Fiber-optic Sensorsmentioning

confidence: 99%

“…59,60 Then, the signal amplitude can reach relatively high values, which bring difficulties in the demodulation of the phase signal. Therefore, systems for the elimination or compensation of body movements are required, and advanced signal analysis techniques have to be able to detect miniature signal changes carrying information on respiration activity and heart function.…”

Section: Interferometric Fiber-optic Sensorsmentioning

confidence: 99%

See 1 more Smart Citation

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.

View full text Add to dashboard Cite

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.

show abstract

Interferometric Fiber Optics Based Sensor for Monitoring of the Heart Activity

Cited by 12 publications

References 3 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 Vital Signs Monitoring. A Review of Its Practicality in the Health Field

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

Contact Info

Product

Resources

About