Optical fiber Bragg grating-instrumented silicone liner for interface pressure measurement within prosthetic sockets of lower-limb amputees

Al-Fakih, Ebrahim A.; Arifin, Nooranida; Pirouzi, Gholamhossein; Adikan, Faisal Rafiq Mahamd; Shasmin, Hanie Nadia; Osman, Noor Azuan Abu

doi:10.1117/1.jbo.22.8.087001

Cited by 13 publications

(8 citation statements)

References 15 publications

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“…137 Furthermore, FBG sensors have been used. [138][139][140] These sensors are flexible, reliable, with high sensitivity and minimum hysteresis and enable simultaneous measurement of different variables such as force, pressure, shear, temperature, and humidity, which makes them a potential choice for use in smart and active sockets.…”

Section: Interface Pressure and Shear Stressmentioning

confidence: 99%

Lower limb prosthetic interfaces

Safari

2020

Prosthetics &Amp; Orthotics International

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The human–prosthesis interface is one of the most complicated challenges facing the field of prosthetics, despite substantive investments in research and development by researchers and clinicians around the world. The journal of the International Society for Prosthetics and Orthotics, Prosthetics and Orthotics International, has contributed substantively to the growing body of knowledge on this topic. In celebrating the 50th anniversary of the International Society for Prosthetics and Orthotics, this narrative review aims to explore how human–prosthesis interfaces have changed over the last five decades; how research has contributed to an understanding of interface mechanics; how clinical practice has been informed as a result; and what might be potential future directions. Studies reporting on comparison, design, manufacturing and evaluation of lower limb prosthetic sockets, and osseointegration were considered. This review demonstrates that, over the last 50 years, clinical research has improved our understanding of socket designs and their effects; however, high-quality research is still needed. In particular, there have been advances in the development of volume and thermal control mechanisms with a few designs having the potential for clinical application. Similarly, advances in sensing technology, soft tissue quantification techniques, computing technology, and additive manufacturing are moving towards enabling automated, data-driven manufacturing of sockets. In people who are unable to use a prosthetic socket, osseointegration provides a functional solution not available 50 years ago. Furthermore, osseointegration has the potential to facilitate neuromuscular integration. Despite these advances, further improvement in mechanical features of implants, and infection control and prevention are needed.

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Section: Interface Pressure and Shear Stressmentioning

confidence: 99%

Lower limb prosthetic interfaces

Safari

2020

Prosthetics &Amp; Orthotics International

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“…For instance, as goniometers for the wrist, showing satisfactory results in the tracking of the wrist movement considering their degrees of freedom [12], in monitoring the angles of the fingers [13], the elbow and ankle, among others [14]. Regarding prosthetic applications, some works have focused on sensing pressure between the socket-user interface, measured the angle of the elbow [15], and mapped the strain of a below-knee prosthesis [16].…”

Section: Introductionmentioning

confidence: 99%

Pressure and Angle Sensors with Optical Fiber for Instrumentation of the PrHand Hand Prosthesis

Arco

Pontes

Segatto

et al. 2022

J. Phys.: Conf. Ser.

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The principal cause of upper limb amputations is due to traumatism. The prosthesis is an assistive device to help in the activities of daily for the amputee person. However, one of the latest reports shows that in developing countries there are around 30 million people without assistive devices. This work presents the development of two kinds of sensors for the PrHand, an upper limb prosthesis based on compliant mechanism and soft-robotics. The sensors are made with polymeric optical fiber (POF), due to their flexibility and low cost, and the working principle is based on intensity variation. The angle sensors are used for monitoring the interphalangeal joint of the fingers, and for the assessment were made cycles of closing and opening each finger. On the other hand, the force sensors are located at the tip of three fingers to track the force made over the objects. Before encoring the sensors were evaluated making five cycles of compressing and decompressing each sensor. The results show a linear behavior between the angle and the voltage variation, one most remarkable angle sensor result was with a sensibility of 0.0357 V/° and an R2 of 99 % closing and 0.0483 V/° opening. In the case of the force sensor, a polynomial relation was found between the voltage changes and the pressure over the sensor; in some cases, the relation between voltage changes and pressure could be linear but that depends on the construction of the sensor. Regarding the obtained R2 of 99 %, its sensibility was 0.0361 V/N compression and 0.0368 V/N decompression. In conclusion, was successfully developed two kinds of sensors for the instrumentation of PrHand prosthesis. It is expected to use angle and sensor variables as input in algorithms of Machine Learning to improve the detection of objects. One aspect to improve is to control in a better way the sensor construction parameters due to the considerable influence over the sensor behavior.

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“…Concerning to the prosthetic application, in 2017, an FBGinstrumented prosthetic silicone liner that provides cushioning for the residual limb and can successfully measure interface pressures inside prosthetic sockets of lower-limb amputees was proposed [32]. The liner is made of two silicone layers between which twelve FBG sensors were embedded at locations of clinical interest to measure pressure.…”

Section: Introductionmentioning

confidence: 99%

Optically Instrumented Insole for Gait Plantar and Shear Force Monitoring

Tavares¹,

Leite

Domingues

et al. 2021

IEEE Access

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In this work, a fiber Bragg gratings (FBGs) based sensing insole, capable of simultaneously measure plantar force (PF) and shear force (SF) is proposed. The insole has four measuring points, strategically located for a full gait analysis. Each sensing point contains a sensor-cell which consists in a polylactic acid (PLA) structure, covered by an epoxy resin layer, and crossed by one optical fiber with two FBGs, FBG1 and FBG2, respectively. Due to the specific design of the system, the FBG1 is sensitive to both forces (with higher sensitivity to the PF), while the FBG2 is designed to detect only the SF. The instrumented insole was tested during static and gait exercises, and the results, obtained for the PF and SF monitoring, were according with those theoretically expected.INDEX TERMS Foot plantar sensor, gait cycle anomalies, multiplexed fiber Bragg gratings, pressure ulcers, shear force sensor.

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Optical fiber Bragg grating-instrumented silicone liner for interface pressure measurement within prosthetic sockets of lower-limb amputees

Cited by 13 publications

References 15 publications

Lower limb prosthetic interfaces

Lower limb prosthetic interfaces

Pressure and Angle Sensors with Optical Fiber for Instrumentation of the PrHand Hand Prosthesis

Optically Instrumented Insole for Gait Plantar and Shear Force Monitoring

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