Microstructured Optical Fiber Based Distributed Sensor for <i>In Vivo</i> Pressure Detection

Zhang, Wei; Ni, Xiaoling; Wang, Jingyi; Ai, Fan; Luo, Yiyang; Yan, Zhijun; Liu, Deming; Sun, Qizhen

doi:10.1109/jlt.2019.2894299

Cited by 15 publications

(6 citation statements)

References 26 publications

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“…The calculation of the distributed strain along the fiber body may provide diagnoses of diseases, such as motility of the gastrointestinal tract. Zhang et al proposed a distributed hyperelastic elastomer-packaged pressure sensor for lateral force sensing [ 46 ].…”

Section: Probes For In Vivo Physical Sensingmentioning

confidence: 99%

Progress in Probe-Based Sensing Techniques for In Vivo Diagnosis

et al. 2022

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Advancements in robotic surgery help to improve the endoluminal diagnosis and treatment with minimally invasive or non-invasive intervention in a precise and safe manner. Miniaturized probe-based sensors can be used to obtain information about endoluminal anatomy, and they can be integrated with medical robots to augment the convenience of robotic operations. The tremendous benefit of having this physiological information during the intervention has led to the development of a variety of in vivo sensing technologies over the past decades. In this paper, we review the probe-based sensing techniques for the in vivo physical and biochemical sensing in China in recent years, especially on in vivo force sensing, temperature sensing, optical coherence tomography/photoacoustic/ultrasound imaging, chemical sensing, and biomarker sensing.

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Section: Probes For In Vivo Physical Sensingmentioning

confidence: 99%

Progress in Probe-Based Sensing Techniques for In Vivo Diagnosis

et al. 2022

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“…Owing that the silica fiber is insensitive to the pressure [25], polymer material is used to package the sensing fiber as a pressure transducer in this work. Fig.…”

Section: A Sensitization Principlementioning

confidence: 99%

“…And , , and are the elastic modulus of silica fiber, acrylic resin and PVC. Similarly, the axial strain 2 of the acrylic resin coating fiber without packaging can be express as [25]…”

Section: A Sensitization Principlementioning

confidence: 99%

Noninvasive Monitoring of Vital Signs Based on Highly Sensitive Fiber Optic Mattress

Wang

et al. 2020

IEEE Sensors J.

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A smart mattress based on optical fiber Mach-zender interferometer (OF-MZI) is designed for noninvasive and continuous monitoring of human vital signs. Through arranging the sensing fiber between two elastic covering layers with sandwich structure, the mattress was sensitive to the respiration and heartbeat induced micro-pressure. In the processing terminal, the waveforms of vital signs were demodulated by 3 *3 coupler based differentiate and cross-multiplying method, and then four characteristic indicators including the heart rate, heartbeat amplitude, respiration rate, and respiration amplitude were respectively extracted through feature extraction algorithm, for evaluating the human health condition. Clinical experimental results of eighteen subjects indicate that the mattress system could not only distinguish the activity states of no body, on bed, body movement and off bed, but also contribute to clinical diagnosis of bradycardia, tachycardia, polypnea and apnoea. By adopting Bland-Altman analysis method, good reproducibility and accuracy were confirmed, where the max errors of heart rate and respiration rate are respectively 2 bpm and 1 bpm. Moreover, the responses at different positions of the mattress are identical and the continuous monitoring results in one day are consistent with daily change of vital signs, which proves that the fiber optic mattress has good reliability and stability. Beneficial from high-sensitivity, multiple parameters, long-term continuous monitoring, high comfortability and low cost, the mattress is promising in the early detection and prevention of cardiac and respiratory diseases as a household medical device.Index Terms-smart mattress, optical fiber Machzender interferometer, healthcare monitoring, heartbeat, respiration.

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“…There are a large number of different electric temperature sensors, e.g., negative temperature coefficient (NTC) thermistors [1], resistance temperature detectors, thermocouples [2] or semiconductor temperature sensors [3,4]. Recently, optical fiber sensors have been intensively developed for a large number of applications, such as: temperature measurement [5][6][7][8], displacement sensing [9][10][11][12], strain/pressure detection [13][14][15][16][17], and bio-photonic and medical tests [18][19][20]. Due to their dielectric nature, numerous advantages can be distinguished: contactless operation, small dimension and weight, high efficiency and low cost.…”

Section: Introductionmentioning

confidence: 99%

Temperature Sensor Based on Periodically Tapered Optical Fibers

Guzowski

Lakomski

2021

Sensors

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In this paper, the fabrication and characterization of a temperature sensor based on periodically tapered optical fibers (PTOF) are presented. The relation between the geometry of the sensors and sensing ability was investigated in order to find the relatively simple structure of a sensor. Four types of PTOF structures with two, four, six and eight waists were manufactured with the fusion splicer. For each PTOF type, the theoretical free spectral range (FSR) was calculated and compared with measurements. The experiments were conducted for a temperature range of 20–70 °C. The results proved that the number of the tapered regions in PTOF is crucial, because some of the investigated structures did not exhibit the temperature response. The interference occurring inside the structures with two and four waists was found be too weak and, therefore, the transmission dip was hardly visible. We proved that sensors with a low number of tapered regions cannot be considered as a temperature sensor. Sufficiently more valuable results were obtained for the last two types of PTOF, where the sensor’s sensitivity was equal to 0.07 dB/°C with an excellent linear fitting (R2 > 0.99). The transmission dip shift can be described by a linear function (R2 > 0.97) with a slope α > 0.39 nm/°C.

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Microstructured Optical Fiber Based Distributed Sensor for In Vivo Pressure Detection

Cited by 15 publications

References 26 publications

Progress in Probe-Based Sensing Techniques for In Vivo Diagnosis

Progress in Probe-Based Sensing Techniques for In Vivo Diagnosis

Noninvasive Monitoring of Vital Signs Based on Highly Sensitive Fiber Optic Mattress

Temperature Sensor Based on Periodically Tapered Optical Fibers

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