Design of a wearable fiber optic respiration sensor for application in NICU incubators

Hariyanti, Hariyanti; Devara, Kresna; Aisyah, Fitriyanti Nur; Nadia, Ketut Vanda Aryanthera Wisnu; Purnamaningsih, Retno Wigajatri

doi:10.1063/1.5096670

Cited by 8 publications

(9 citation statements)

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“…Table 5 shows that on-body sensors (our results and results of the other on-body sensors [16,20]) have higher accuracy and lower error than the external sensors (i.e. camera methods or sensors on the mattress) meaning that on-body sensors provide more reliable monitoring.…”

Section: E-textile Pressure Sensorsmentioning

confidence: 86%

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An E-Textile Respiration Sensing System for NICU Monitoring: Design and Validation

Cay

Ravichandran

Saikia

et al. 2021

J Sign Process Syst

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The world is witnessing a rising number of preterm infants who are at significant risk of medical conditions. These infants require continuous care in Neonatal Intensive Care Units (NICU). Medical parameters are continuously monitored in premature infants in the NICU using a set of wired, sticky electrodes attached to the body. Medical adhesives used on the electrodes can be harmful to the baby, causing skin injuries, discomfort, and irritation. In addition, respiration rate (RR) monitoring in the NICU faces challenges of accuracy and clinical quality because RR is extracted from electrocardiogram (ECG). This research paper presents a design and validation of a smart textile pressure sensor system that addresses the existing challenges of medical monitoring in NICU. We designed two e-textile, piezoresistive pressure sensors made of Velostat for noninvasive RR monitoring; one was hand-stitched on a mattress topper material, and the other was embroidered on a denim fabric using an industrial embroidery machine. We developed a data acquisition system for validation experiments conducted on a high-fidelity, programmable NICU baby mannequin. We designed a signal processing pipeline to convert raw time-series signals into parameters including RR, rise and fall time, and comparison metrics. The results of the experiments showed that the relative accuracies of hand-stitched sensors were 98.68 (top sensor) and 98.07 (bottom sensor), while the accuracies of embroidered sensors were 99.37 (left sensor) and 99.39 (right sensor) for the 60 BrPM test case. The presented prototype system shows promising results and demands more research on textile design, human factors, and human experimentation.

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Section: E-textile Pressure Sensorsmentioning

confidence: 86%

“…Hariyanti et al designed a wearable fiber optic respiration sensor [20]. They used a bending optical fiber integrated into an elastic material and attached this sensor to the outside of an infant's diaper.…”

Section: Research On Nicu Technologiesmentioning

confidence: 99%

An E-Textile Respiration Sensing System for NICU Monitoring: Design and Validation

Cay

Ravichandran

Saikia

et al. 2021

J Sign Process Syst

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“…The sensors in Table 6 are the most robust and complete proposals for measuring vital signs; their sensitivity and reliability make them great candidates for operation in in vivo situations; however, for us the best are still those that do not require human intervention, but those that are placed on some kind of guide, mattress, or pad [ 69 , 74 , 84 , 91 , 103 , 119 ], since the error factor due to direct human intervention and the practicality of handling the sensors themselves is eliminated. It can be clearly observed in this table that cardiac pulse and respiration are almost always obtained together.…”

Section: Discussionmentioning

confidence: 99%

“…It can be observed ( Figure 12 ) that its OF is given a layer of hygroscopic material, agar, and an acrylate cover for protection since the characterized fiber goes inside a hypodermic needle, achieving a confidence level during monitoring of 95%. Another project that draws attention was [ 73 ], where they presented an OF sensor generated with microcurves forming a mesh for the measurement of the perioperative pulse and respiratory rate in infants [ 74 ] from 01 to 12 months of age. Monitoring of the infant was performed through a mat where he remained lying down to obtain readings of 23.5 breaths per minute (bpm) to 23.5 bpm all with an MMF working in the 1310 nm of the NIR spectrum.…”

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

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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.

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“…As it is well-known, it is common to find sensing applications where optical fibers are used. Temperature [8], strain [9] or bending [10], among others, are good examples of typical parameters that can be detected with this technology. However, using the optical fiber cable for biomedical purposes makes sense too, since it offers interesting properties to be considered when it is introduced in the organism.…”

Section: Introductionmentioning

confidence: 99%

Optical System Based on Multiplexed FBGs to Monitor Hand Movements

et al. 2021

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This contribution reports the development and characterization of an optical system based on parallel Fiber Bragg Gratings (FBGs) to monitor the movements of the wrist and fingers of a hand. The system consisted of a reflective configuration made of FBGs detecting the movements of the fingers and one more located on the wrist as a reference. All FBGs were multiplexed in order to collect the basic movements of the hand. Fibers were embedded in polydimethylsiloxane for protection and to give flexibility to the optical detection setup. Measurements of strain, angle and torsion were performed during the experiments, obtaining sensitivities up to 1.29 pm/µε in strain and 64.23 pm/º in angle. Also, a study on the influence of a single sensor on the performance of the whole system was analyzed for a complete study of this proof of concept. The obtained results present a simple system that can be used to monitor the positions of the hand or for the rehabilitation of patients suffering from neuromotor or post-stroke diseases.

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Design of a wearable fiber optic respiration sensor for application in NICU incubators

Cited by 8 publications

References 0 publications

An E-Textile Respiration Sensing System for NICU Monitoring: Design and Validation

An E-Textile Respiration Sensing System for NICU Monitoring: Design and Validation

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

Optical System Based on Multiplexed FBGs to Monitor Hand Movements

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