Fibre-grating sensors for the measurement of physiological pulsations

Petrovic, Marija; Daničić, Aleksandar; Atanasoski, Vladimir; Radosavljevic, Sanja; Prodanović, V.; Miljković, Nadica; Petrović, Jovana; Petrovic, Jovana; Bojović, Boško; Hadžievski, Ljupčo; Allsop, Thomas D.P.; Lloyd, Glynn; Webb, David J.

doi:10.1088/0031-8949/2013/t157/014022

Cited by 8 publications

(2 citation statements)

References 12 publications

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“…The wavelength was changed by changing the DFB laser temperature. For the grating characterization we used a specially designed gauge with three-point bending [25], where the central point of the grating is fixed and the force is applied at the defined distance either side of the center. Since we measure the curvature changes around a preset curvature, we want to position the working point (WP) so that the grating characteristic around it is monotonic and, if possible, linear in the whole breathing range (Fig.…”

Section: Measurement Schemementioning

confidence: 99%

Non-invasive respiratory monitoring using long-period fiber grating sensors

Petrovic¹,

Petrovic²,

Daničić³

et al. 2014

Biomed. Opt. Express

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In non-invasive ventilation, continuous monitoring of respiratory volumes is essential. Here, we present a method for the measurement of respiratory volumes by a single fiber-grating sensor of bending and provide the proof-of-principle by applying a calibration-test measurement procedure on a set of 18 healthy volunteers. Results establish a linear correlation between a change in lung volume and the corresponding change in a local thorax curvature. They also show good sensor accuracy in measurements of tidal and minute respiratory volumes for different types of breathing. The proposed technique does not rely on the air flow through an oronasal mask or the observation of chest movement by a clinician, which distinguishes it from the current clinical practice.

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Section: Measurement Schemementioning

confidence: 99%

Non-invasive respiratory monitoring using long-period fiber grating sensors

Petrovic¹,

Petrovic²,

Daničić³

et al. 2014

Biomed. Opt. Express

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show abstract

“…The monitoring of lung volume is also carried out using a LPG curvature sensor and a photodiode as a detector which reduces the cost of the sensing system by a huge margin. The usage of LPG is favoured by the authors because LPGs offers higher sensitivity to bending as the cladding modes of the LPGs are highly sensitive to the bends [55]. Since the LPG sensors fabricated in a conventional single mode optical fiber are very sensitive to surrounding RI, the employment of LPGs in clinical usage becomes extremely difficult as the cross sensitivities must be reduced.…”

Section: Acquisition Of the Thoracic Displacements During Respirationmentioning

confidence: 99%

Fiber grating sensors and their recent applications in biomedical domain

Kavitha

Pant

Sood

et al. 2023

J. Opt.

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AbstractSensors play an important role in measuring various physio chemical and biological parameters. Biomedical applications of sensors include early level diagnosis of diseases, treatment technique enhancement and also monitoring the effect of medical techniques using suitable biomedical devices. The sensors which are deemed suitable for biomedical applications need to be fast, accurate, flexible, small, and most importantly, biocompatible. The inherent advantages of fiber optic sensors, such as small foot print, electrical passiveness, multiplexing capability and fast response make them the most preferred for biomedical sensing applications. Fiber optics sensors are generally used in the measurement of parameters such as temperature, strain, pressure, displacement, angle, and force. and find applications in diverse regimes like structural health monitoring, shape sensing, seismic sensing; in the bio medical domain, they have been deployed in gait analysis, pulse rate monitoring, body joint angle measurements, acquisition of respiratory parameters, cardiovascular parameters and many more. Despite being a topic of significant interest in biomedical applications, the adoptablility of optical sensors in clinical practice is not very encouraging. Hence, there is a need to address the reasons for the same, and the present review aims to highlight some critical areas. The present review paper primarily discusses the optical fibre grating techniques: their fabrication methods, the applications of these sensors in biophysical and biomechanical measurements, bio proteins and biomarker detection in body fluids. The review also discusses the bottlenecks in the clinical application of these sensors. The comparison of the performance of the optical fibre sensors with other sensing techniques is also discussed in this review paper.

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A long-period fibre grating monitor of respiratory volumes for the use in non-invasive mechanical ventilation

Ivanović

Petrovic

2016

Opt Quant Electron

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The ventilators involved in mechanical ventilation are usually equipped with pneumatic sensor detecting patient's own respiratory effort in order to assist spontaneous breathing. However, the interface of the mask with the patient promotes air leaks that affect the measurement of pneumatic variables and hence induces patient-ventilator asynchrony. In this paper we describe a new method and apparatus for continuous monitoring of the respiration based on the measurement of chest wall movements. The proposed solution uses a long-period fibre grating sensor attached to patient's thorax and a simple and cost-effective monochromatic measurement scheme. On a set of healthy volunteers, we have established the linear correlation between the change in local torso curvature and the tidal volume during clinically relevant breathing patterns. The chest-wall movement measured by the grating advances with respect to the air-flow signal by about 200 ms, indicating the possibility to lead to more confidence triggering decision. The proposed scheme is non-invasive, simple, low-cost, and immune to air-leaks and drifts that are limiting factors in the currently standard pneumatic measurement techniques.

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Fibre-grating sensors for the measurement of physiological pulsations

Cited by 8 publications

References 12 publications

Non-invasive respiratory monitoring using long-period fiber grating sensors

Non-invasive respiratory monitoring using long-period fiber grating sensors

Fiber grating sensors and their recent applications in biomedical domain

A long-period fibre grating monitor of respiratory volumes for the use in non-invasive mechanical ventilation

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