Instrumented hip implants: Electric supply systems

Santos, M.A.; Ferreira, José Martins; Ramos, António; Simões, J. A.; Morais, Raul; Silva, Nuno; Santos, P. Marques Dos; Reis, Manuel J. C. S.; Oliveira, Tiago

doi:10.1016/j.jbiomech.2013.08.002

Cited by 38 publications

(28 citation statements)

References 80 publications

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“…Concern is growing that RFID systems have the potential to be used as tools for surveillance, which could very much undermine the dignity and autonomy of employees. Recent studies have shown that the RFID technology is safe enough to be used for personal identifi cation and some attempts were made to use RFID subcutaneous microchip implants (RFID-SM) [21,22,23]. Th e number of people willing to get chipped has increased since the technology's commercial arrival in 2002, despite the fact that adoption rates have been very low.…”

Section: Applications Of Rfid Technologymentioning

confidence: 99%

Factors Affecting RFID Subcutaneous Microchips Usage

Čičević¹,

Samcovic²,

Dragović³

et al. 2019

Proceedings of the International Scientific Conference - Sinteza 2019

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Microchips are used for many years for different purposes. Nevertheless, recently applications of radio frequency identification technology have been progressed tremendously with the potential to permeate throughout society as valuable tool for enabling automatic identification and management. However, they are perceived as threats at several levels that impede its implementation. Most of the research discusses the adoption of Radio Frequency Identification (RFID) devices from the provider's point of view. Thus, it would be of interest to examine the factors of RFID subcutaneous microchip (RFID-SM) usage, adoption and diffusion by individuals from various perspectives, particularly in developing countries. Knowledge upon the factors that drive RFID adoption is a crucial step in creating the policies required for its successful implementation. This quantitative, descriptive study investigated whether young people in Serbia would be willing to use subcutaneous microchip. Preliminary findings indicate that positive attitudes prevail for the perceived usefulness and ease of use, while suspicions of confidentiality and privacy are strong, and what is most surprising none of the respondents showed willingness to use microchip implants for everyday home activities. Since the process of individual users' acceptance of technology is very complex, the full range of variables should be investigated from broader perspective.

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Section: Applications Of Rfid Technologymentioning

confidence: 99%

Factors Affecting RFID Subcutaneous Microchips Usage

Čičević¹,

Samcovic²,

Dragović³

et al. 2019

Proceedings of the International Scientific Conference - Sinteza 2019

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“…This new technological trend is emerging to implement multifunctional and intelligent orthopedic implants comprising feedback control systems with the ability to enhance bone growth when loosening states are detected [21,29]. The concept of instrumented implant is an unquestionably disruptive concept that aims to optimize the performance of implants [18,21,29,31]. These are instrumented active technologies incorporating biophysical delivery systems, monitoring systems, wireless communication, and self-powering systems, such that their operation can be controlled by clinicians [18,21,[29][30][31].…”

Section: Introductionmentioning

confidence: 99%

“…The concept of instrumented implant is an unquestionably disruptive concept that aims to optimize the performance of implants [18,21,29,31]. These are instrumented active technologies incorporating biophysical delivery systems, monitoring systems, wireless communication, and self-powering systems, such that their operation can be controlled by clinicians [18,21,[29][30][31]. For example, this concept can be applied in hip prostheses by incorporating stimulation systems inside the implant (to deliver electromagnetic or mechanical stimuli, among others, to bone structures around the implants), near the proximomedial region where bone loss often occurs, as the stress distribution is usually reduced in this region following arthroplasty [18].…”

Section: Introductionmentioning

confidence: 99%

Altering the Course of Technologies to Monitor Loosening States of Endoprosthetic Implants

Cachão

Santos

Bernardo

et al. 2019

Sensors

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Musculoskeletal disorders are becoming an ever-growing societal burden and, as a result, millions of bone replacements surgeries are performed per year worldwide. Despite total joint replacements being recognized among the most successful surgeries of the last century, implant failure rates exceeding 10% are still reported. These numbers highlight the necessity of technologies to provide an accurate monitoring of the bone–implant interface state. This study provides a detailed review of the most relevant methodologies and technologies already proposed to monitor the loosening states of endoprosthetic implants, as well as their performance and experimental validation. A total of forty-two papers describing both intracorporeal and extracorporeal technologies for cemented or cementless fixation were thoroughly analyzed. Thirty-eight technologies were identified, which are categorized into five methodologies: vibrometric, acoustic, bioelectric impedance, magnetic induction, and strain. Research efforts were mainly focused on vibrometric and acoustic technologies. Differently, approaches based on bioelectric impedance, magnetic induction and strain have been less explored. Although most technologies are noninvasive and are able to monitor different loosening stages of endoprosthetic implants, they are not able to provide effective monitoring during daily living of patients.

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“…Magnetic levitation has been used to implement low-cost and maintenance-free electromagnetic energy harvesters, with the ability to operate autonomously with stable performance for long periods of time 17 18 19 . Their non-complex design is effective in many applications involving severe dimensional constraints 19 .…”

mentioning

confidence: 99%

“…Their inherent nonlinearities have not yet been observed in detail due to their insufficient levitation gaps. Besides, many applications require self-powering technology in which levitation must be stable for a broad range of orientations (with respect to the acceleration of gravity) and for unconstrained motion amplitudes of the moving magnet 7 17 , which is hard to accomplish by diamagnetic levitation. Moreover, no configuration has been developed to allow motion of the levitating magnet along most of the harvester length using this levitation method 27 28 29 30 .…”

mentioning

confidence: 99%

Magnetic levitation-based electromagnetic energy harvesting: a semi-analytical non-linear model for energy transduction

Santos

Ferreira

Simões

et al. 2016

Sci Rep

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Magnetic levitation has been used to implement low-cost and maintenance-free electromagnetic energy harvesting. The ability of levitation-based harvesting systems to operate autonomously for long periods of time makes them well-suited for self-powering a broad range of technologies. In this paper, a combined theoretical and experimental study is presented of a harvester configuration that utilizes the motion of a levitated hard-magnetic element to generate electrical power. A semi-analytical, non-linear model is introduced that enables accurate and efficient analysis of energy transduction. The model predicts the transient and steady-state response of the harvester a function of its motion (amplitude and frequency) and load impedance. Very good agreement is obtained between simulation and experiment with energy errors lower than 14.15% (mean absolute percentage error of 6.02%) and cross-correlations higher than 86%. The model provides unique insight into fundamental mechanisms of energy transduction and enables the geometric optimization of harvesters prior to fabrication and the rational design of intelligent energy harvesters.

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Instrumented hip implants: Electric supply systems

Cited by 38 publications

References 80 publications

Factors Affecting RFID Subcutaneous Microchips Usage

Factors Affecting RFID Subcutaneous Microchips Usage

Altering the Course of Technologies to Monitor Loosening States of Endoprosthetic Implants

Magnetic levitation-based electromagnetic energy harvesting: a semi-analytical non-linear model for energy transduction

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