The Capability of Fiber Bragg Grating Sensors to Measure Amputees’ Trans-Tibial Stump/Socket Interface Pressures

Al-Fakih, Ebrahim A.; Osman, Noor Azuan Abu; Eshraghi, Arezoo; Adikan, Faisal Rafiq Mahamd

doi:10.3390/s130810348

Cited by 34 publications

(24 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The capability of FBG sensors to measure interface pressures between the residual limb and socket in-situ was first investigated by researchers from the University of Malaya Center for Applied Biomechanics (CAB) in 2013 [ 121 ]. A pressure sensor was formed by embedding a single FBG at the neutral layer of a polymeric sensing pad and attached to the PT region of the socket.…”

Section: Types Of Transducersmentioning

confidence: 99%

Techniques for Interface Stress Measurements within Prosthetic Sockets of Transtibial Amputees: A Review of the Past 50 Years of Research

Al-Fakih

Osman

Adikan

2016

Sensors

Self Cite

View full text Add to dashboard Cite

The distribution of interface stresses between the residual limb and prosthetic socket of a transtibial amputee has been considered as a direct indicator of the socket quality fit and comfort. Therefore, researchers have been very interested in quantifying these interface stresses in order to evaluate the extent of any potential damage caused by the socket to the residual limb tissues. During the past 50 years a variety of measurement techniques have been employed in an effort to identify sites of excessive stresses which may lead to skin breakdown, compare stress distributions in various socket designs, and evaluate interface cushioning and suspension systems, among others. The outcomes of such measurement techniques have contributed to improving the design and fitting of transtibial sockets. This article aims to review the operating principles, advantages, and disadvantages of conventional and emerging techniques used for interface stress measurements inside transtibial sockets. It also reviews and discusses the evolution of different socket concepts and interface stress investigations conducted in the past five decades, providing valuable insights into the latest trends in socket designs and the crucial considerations for effective stress measurement tools that lead to a functional prosthetic socket.

show abstract

Section: Types Of Transducersmentioning

confidence: 99%

Techniques for Interface Stress Measurements within Prosthetic Sockets of Transtibial Amputees: A Review of the Past 50 Years of Research

Al-Fakih

Osman

Adikan

2016

Sensors

Self Cite

View full text Add to dashboard Cite

show abstract

“…Attempts to produce sensors capable of measuring the pressure within prosthetic sockets have tended to involve piezoresistive [21][22][23], piezoelectric [24][25][26], capacitive [27][28][29][30], optical sensors [31][32][33][34][35][36][37] and microelectromechanical (MEMs) sensors [38][39][40][41].…”

mentioning

confidence: 99%

Examination of the Performance Characteristics of Velostat as an In-Socket Pressure Sensor

2020

View full text Add to dashboard Cite

Velostat is a low-cost, low-profile electrical bagging material with piezoresistive properties, making it an attractive option for in-socket pressure sensing. The focus of this research was to explore the suitability of a Velostatbased system for providing real-time socket pressure profiles. The prototype system performance was explored through a series of bench tests to determine properties including accuracy, repeatability and hysteresis responses, and through participant testing with a single subject. The fabricated sensors demonstrated mean accuracy errors of 110 kPa and significant cyclical and thermal drift effects of up to 0.00715 V/cycle and leading to up to a 67% difference in voltage range respectively. Despite these errors the system was able to capture data within a prosthetic socket, aligning to expected contact and loading patterns for the socket and amputation type. Distinct pressure maps were obtained for standing and walking tasks displaying loading patterns indicative of posture and gait phase. The system demonstrated utility for assessing contact and movement patterns within a prosthetic socket, potentially useful for improvement of socket fit, in a low cost, low profile and adaptable format. However, Velostat requires significant improvement in its electrical properties before proving suitable for accurate pressure measurement tools in lower limb prosthetics.

show abstract

“…[ 119 ] When introduced into the fl exible host, the geometry of the fi bers has an infl uence on the sensing behavior. Such, the grating wavelength of an FBG fi ber has to be reassessed after curing due to possible contractions of the host polymer fi lm.…”

Section: Flexible Hosts For Optical Fiber Embeddingmentioning

confidence: 99%

“…Such, the grating wavelength of an FBG fi ber has to be reassessed after curing due to possible contractions of the host polymer fi lm. [ 119 ] When introduced into the fl exible host, the geometry of the fi bers has an infl uence on the sensing behavior. The sensing response has to be calibrated and should only be infl uenced by one parameter, e.g., bending angle.…”

Section: Flexible Hosts For Optical Fiber Embeddingmentioning

confidence: 99%

Body‐Monitoring and Health Supervision by Means of Optical Fiber‐Based Sensing Systems in Medical Textiles

Quandt

Scherer

Boesel

et al. 2014

Adv Healthcare Materials

125

View full text Add to dashboard Cite

Long-term monitoring with optical fibers has moved into the focus of attention due to the applicability for medical measurements. Within this Review, setups of flexible, unobtrusive body-monitoring systems based on optical fibers and the respective measured vital parameters are in focus. Optical principles are discussed as well as the interaction of light with tissue. Optical fiber-based sensors that are already used in first trials are primarily selected for the section on possible applications. These medical textiles include the supervision of respiration, cardiac output, blood pressure, blood flow and its saturation with hemoglobin as well as oxygen, pressure, shear stress, mobility, gait, temperature, and electrolyte balance. The implementation of these sensor concepts prompts the development of wearable smart textiles. Thus, current sensing techniques and possibilities within photonic textiles are reviewed leading to multiparameter designs. Evaluation of these designs should show the great potential of optical fibers for the introduction into textiles especially due to the benefit of immunity to electromagnetic radiation. Still, further improvement of the signal-to-noise ratio is often necessary to develop a commercial monitoring system.

show abstract

The Capability of Fiber Bragg Grating Sensors to Measure Amputees’ Trans-Tibial Stump/Socket Interface Pressures

Cited by 34 publications

References 17 publications

Techniques for Interface Stress Measurements within Prosthetic Sockets of Transtibial Amputees: A Review of the Past 50 Years of Research

Techniques for Interface Stress Measurements within Prosthetic Sockets of Transtibial Amputees: A Review of the Past 50 Years of Research

Examination of the Performance Characteristics of Velostat as an In-Socket Pressure Sensor

Body‐Monitoring and Health Supervision by Means of Optical Fiber‐Based Sensing Systems in Medical Textiles

Contact Info

Product

Resources

About