Fiber Optic-Based Pressure Sensing Surface for Skin Health Management in Prosthetic and Rehabilitation Interventions

Tsiokos, D.; Kanellos, George T.; Papaioannou, George; Pissadakis, Stavros

doi:10.5772/50574

Cited by 18 publications

(10 citation statements)

References 46 publications

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“…8b) may allow the evaluation of normal and shear stresses with high sensitivity. They have been recently embedded in a liner or in a socket [62]- [65]. The main disadvantage of these systems is the relatively high risk of damaging the fibers or the electronic components.…”

Section: B Sensing Technologies For Measuring Stress Distribution Inmentioning

confidence: 99%

Sockets for Limb Prostheses: A Review of Existing Technologies and Open Challenges

Paternò

Ibrahimi

Gruppioni

et al. 2018

IEEE Trans. Biomed. Eng.

192

204

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In the prosthetics field, one of the most important bottlenecks is still the human-machine interface, namely the socket. Indeed, a large number of amputees still rejects prostheses or points out a low satisfaction level, due to a sub-optimal interaction between the socket and the residual limb tissues. The aim of this paper is to describe the main parameters (displacements, stress, volume fluctuations and temperature) affecting the stump-socket interface and reducing the comfort/stability of limb prostheses. In this review, a classification of the different socket types proposed in the literature is reported, together with an analysis of advantages and disadvantages of the different solutions, from multiple viewpoints. The paper then describes the technological solutions available to face an altered distribution of stresses on the residual limb tissues, volume fluctuations affecting the stump overtime and temperature variations affecting the residual tissues within the socket. The open challenges in this research field are highlighted and the possible future routes are discussed, towards the ambitious objective of achieving an advanced socket able to self-adapt in real-time to the complex interplay of factors affecting the stump, during both static and dynamic tasks.

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Section: B Sensing Technologies For Measuring Stress Distribution Inmentioning

confidence: 99%

Sockets for Limb Prostheses: A Review of Existing Technologies and Open Challenges

Paternò

Ibrahimi

Gruppioni

et al. 2018

IEEE Trans. Biomed. Eng.

192

204

View full text Add to dashboard Cite

show abstract

“…It was obvious that the FBGs embedded in harder materials exhibit higher sensitivity and accuracy with both types of liners. Tsiokos et al suggested a pressure management system that works in two steps [ 120 ]. The first step is to measure pressure loads across the residual limb-socket interface in order to generate pressure maps that define pressure distribution.…”

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

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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.

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“…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

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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.

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Fiber Optic-Based Pressure Sensing Surface for Skin Health Management in Prosthetic and Rehabilitation Interventions

Cited by 18 publications

References 46 publications

Sockets for Limb Prostheses: A Review of Existing Technologies and Open Challenges

Sockets for Limb Prostheses: A Review of Existing Technologies and Open Challenges

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

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