keyword
MENU ▼
Read by QxMD icon Read
search

Amputee

keyword
https://www.readbyqxmd.com/read/29149193/correction-the-effect-of-alignment-changes-on-unilateral-transtibial-amputee-s-gait-a-systematic-review
#1
Niels Jonkergouw, Maarten R Prins, Arjan W P Buis, Peter van der Wurff
[This corrects the article DOI: 10.1371/journal.pone.0167466.].
2017: PloS One
https://www.readbyqxmd.com/read/29145876/standing-on-slopes-how-current-microprocessor-controlled-prosthetic-feet-support-transtibial-and-transfemoral-amputees-in-an-everyday-task
#2
Michael Ernst, Björn Altenburg, Malte Bellmann, Thomas Schmalz
BACKGROUND: Conventional prosthetic feet like energy storage and return feet provide only a limited range of ankle motion compared to human ones. In order to overcome the poor rotational adaptability, prosthetic manufacturers developed different prosthetic feet with an additional rotational joint and implemented active control in different states. It was the aim of the study to investigate to what extent these commercially available microprocessor-controlled prosthetic feet support a natural posture while standing on inclines and which concept is most beneficial for lower limb amputees...
November 16, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/29144392/design-and-development-of-a-novel-upper-limb-cycling-prosthesis
#3
Akira Tiele, Shivam Soni-Sadar, Jack Rowbottom, Shilen Patel, Edward Mathewson, Samuel Pearson, David Hutchins, John Head, Stephen Hutchins
The rise in popularity of the Paralympics in recent years has created a need for effective, low-cost sports-prosthetic devices for upper-limb amputees. There are various opportunities for lower-limb amputees to participate in cycling; however, there are only few options for those with upper-limb amputations. If the individual previously participated in cycling, a cycling-specific prosthesis could allow these activities to be integrated into rehabilitation methods. This article describes the processes involved with designing, developing and manufacturing such a prosthesis...
November 16, 2017: Bioengineering
https://www.readbyqxmd.com/read/29132347/knee-arthrodesis-versus-above-the-knee-amputation-after-septic-failure-of-revision-total-knee-arthroplasty-comparison-of-functional-outcome-and-complication-rates
#4
Sven Hungerer, Martin Kiechle, Christian von Rüden, Matthias Militz, Knut Beitzel, Mario Morgenstern
BACKGROUND: After septic failure of total knee arthroplasty (TKA) and multiple revision operations resulting in impaired function, bone and/or soft-tissue damage a reconstruction with a revision arthroplasty might be impossible. Salvage procedures to regain mobility and quality of life are an above-the-knee amputation or knee arthrodesis. The decision process for the patient and surgeon is difficult and data comparing arthrodesis versus amputation in terms of function and quality of life are scarce...
November 13, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29132264/leg-amputation-side-determines-performance-in-curve-sprinting-a-case-study-on-a-paralympic-medalist
#5
Johannes Funken, Kai Heinrich, Steffen Willwacher, Ralf Müller, Jonas Böcker, Hiroaki Hobara, Gert-Peter Brüggemann, Wolfgang Potthast
The lower limb kinetics of curve sprinting in amputees are not well described in the literature, particularly with respect to the effect of the side of amputation. This is an issue due to the importance of the knowledge for prosthetic design and classification of athletes. Thus, the aim of this study was to investigate the influence of side of amputation on curve sprinting performance in athletes with a unilateral leg amputation. A three-dimensional motion analysis system (Vicon), four force plates (Kistler) and a modified mathematical human model (ALASKA) were used to compare clockwise and counter clockwise curve sprinting lower limb kinematics and kinetics of a Paralympic medalist with a left-sided knee exarticular amputation...
November 13, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/29126767/the-quality-of-life-analysis-of-knee-prosthesis-with-complete-microprocessor-control-in-trans-femoral-amputees
#6
Yavuz Saglam, Baris Gulenc, Fevzi Birisik, Ali Ersen, Ebru Yilmaz Yalcinkaya, Onder Yazicioglu
OBJECTIVE: The aim of this study was to analyze the patient demographics, etiology of limb loss as well as reporting SF-36 scores for microprocessor prosthesis users in Turkish population. METHODS: We reviewed 72 patients (61 male and 11 female; mean age: 37.7 ± 10.7) with uni-lateral, above knee amputation and a history of regular and microprocessor prosthesis use. All patients were called back for a last follow-up and they were asked to fill a self-administered general health status questionnaire (SF-36)...
November 7, 2017: Acta Orthopaedica et Traumatologica Turcica
https://www.readbyqxmd.com/read/29119861/carbohydrate-and-fat-oxidation-in-persons-with-lower-limb-amputation-during-walking-with-different-speeds
#7
Terje Gjovaag, Peyman Mirtaheri, Inger Marie Starholm
BACKGROUND: Studies suggest that the energy expenditure of healthy persons (control) during walking with the preferred walking speed in steady-state conditions is dominated by fat oxidation. Conversely, carbohydrate and fat oxidation during walking is little investigated in transfemoral amputees. OBJECTIVES: To investigate carbohydrate and fat oxidation, energy cost of walking, and percent utilization of maximal aerobic capacity [Formula: see text]during walking...
November 1, 2017: Prosthetics and Orthotics International
https://www.readbyqxmd.com/read/29105971/home-based-tactile-discrimination-training-tdt-reduces-phantom-limb-pain
#8
Robert Wakolbinger, Martin Diers, Laura A Hruby, Agnes Sturma, Oskar C Aszmann
BACKGROUND: Phantom limb pain (PLP) affects a high percentage of amputees. Since treatment options are limited, low quality of life and addiction to pain medication is frequent. New attempts, such as mirror therapy or electrical sensory discrimination training, make use of the brain's plasticity to alleviate this centrally derived pain. AIM: This pilot study assessed the question, whether home-based tactile discrimination training (TDT) leads to a stronger decrease in phantom limb pain levels, compared to a standard massage treatment...
November 6, 2017: Pain Practice: the Official Journal of World Institute of Pain
https://www.readbyqxmd.com/read/29101804/inhibition-of-mir-20-promotes-proliferation-and-autophagy-in-articular-chondrocytes-by-pi3k-akt-mtor-signaling-pathway
#9
Weidong He, Ye Cheng
Osteoarthritis is a common cause of functional deterioration in older adults and is an immense burden on the aging population. The molecular mechanism underlying the regulation of chondrocyte requires further elucidation, particularly with respect to the role of microRNAs. The aim of this study was to identify and characterize the expression of miR-20 in normal and OA chondrocytes, and to determine its role in OA pathogenesis. MiR-20 expression in cartilage specimens was examined in 30 patients with knee osteoarthritis and 30 traumatic amputees...
November 1, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29101394/interactions-between-transfemoral-amputees-and-a-powered-knee-prosthesis-during-load-carriage
#10
Andrea Brandt, Yue Wen, Ming Liu, Jonathan Stallings, He Helen Huang
Machines and humans become mechanically coupled when lower limb amputees walk with powered prostheses, but these two control systems differ in adaptability. We know little about how they interact when faced with real-world physical demands (e.g. carrying loads). Here, we investigated how each system (i.e. amputee and powered prosthesis) responds to changes in the prosthesis mechanics and gravitational load. Five transfemoral amputees walked with and without load (i.e. weighted backpack) and a powered knee prosthesis with two pre-programmed controller settings (i...
November 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29080913/towards-efficient-decoding-of-multiple-classes-of-motor-imagery-limb-movements-based-on-eeg-spectral-and-time-domain-descriptors
#11
Oluwarotimi Williams Samuel, Yanjuan Geng, Xiangxin Li, Guanglin Li
To control multiple degrees of freedom (MDoF) upper limb prostheses, pattern recognition (PR) of electromyogram (EMG) signals has been successfully applied. This technique requires amputees to provide sufficient EMG signals to decode their limb movement intentions (LMIs). However, amputees with neuromuscular disorder/high level amputation often cannot provide sufficient EMG control signals, and thus the applicability of the EMG-PR technique is limited especially to this category of amputees. As an alternative approach, electroencephalograph (EEG) signals recorded non-invasively from the brain have been utilized to decode the LMIs of humans...
October 28, 2017: Journal of Medical Systems
https://www.readbyqxmd.com/read/29075428/obtaining-natural-sit-to-stand-motion-with-a-biomimetic-controller-for-powered-knee-prostheses
#12
Molei Wu, Md Rejwanul Haque, Xiangrong Shen
Standing up from a seated position is a common activity in people's daily life. However, for transfemoral (i.e., above-knee) amputees fitted with traditional passive prostheses, the sit-to-stand (STS) transition is highly challenging, due to the inability of the prosthetic joints in generating torque and power output. In this paper, the authors present a new STS control approach for powered lower limb prostheses, which is able to regulate the power delivery of the prosthetic knee joint to obtain natural STS motion similar to that displayed by healthy subjects...
2017: Journal of Healthcare Engineering
https://www.readbyqxmd.com/read/29069141/intra-arterial-fibrinolysis-for-the-management-of-acute-ischemia-on-a-below-knee-amputation-stump-case-report
#13
Breno Boueri Affonso, Joaquim Maurício da Motta Leal, Rafael Noronha Cavalcante, Priscila Mina Falsarella, Francisco Leonardo Galastri, Rodolfo Souza Cardoso, Felipe Nasser
Preservation of the knee joint has enormous advantages in terms of mobility and rehabilitation of an amputee. Any cause of breakdown requiring revision to an above-knee amputation is a major setback because it reduces the patient's rehabilitative potential. We report a case of intra-arterial thrombolysis use to save a below-knee amputation stump with acute ischemia. A 56-year-old man who sought the emergency department with 1-day history of acute pain on his right below-knee stump. The angiography confirmed popliteal artery occlusion...
October 23, 2017: Einstein
https://www.readbyqxmd.com/read/29062019/myoelectric-pattern-recognition-outperforms-direct-control-for-transhumeral-amputees-with-targeted-muscle-reinnervation-a-randomized-clinical-trial
#14
Levi J Hargrove, Laura A Miller, Kristi Turner, Todd A Kuiken
Recently commercialized powered prosthetic arm systems hold great potential in restoring function for people with upper-limb loss. However, effective use of such devices remains limited by conventional (direct) control methods, which rely on electromyographic signals produced from a limited set of muscles. Targeted Muscle Reinnervation (TMR) is a nerve transfer procedure that creates additional recording sites for myoelectric prosthesis control. The effects of TMR may be enhanced when paired with pattern recognition technology...
October 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29060946/target-of-physiological-gait-realization-of-speed-adaptive-control-for-a-prosthetic-knee-during-swing-flexion
#15
Wujing Cao, Hongliu Yu, Weiliang Zhao, Jin Li, Xiaodong Wei
BACKGROUND: Prosthetic knee is the most important component of lower limb prosthesis. Speed adaptive for prosthetic knee during swing flexion is the key method to realize physiological gait. OBJECTIVE: This study aims to discuss the target of physiological gait, propose a speed adaptive control method during swing flexion and research the damping adjustment law of intelligent hydraulic prosthetic knee. METHODS: According to the physiological gait trials of healthy people, the control target during swing flexion is defined...
October 13, 2017: Technology and Health Care: Official Journal of the European Society for Engineering and Medicine
https://www.readbyqxmd.com/read/29060523/motor-imagery-classification-of-upper-limb-movements-based-on-spectral-domain-features-of-eeg-patterns
#16
Oluwarotimi Williams Samuel, Xiangxin Li, Yanjuan Geng, Pang Feng, Shixiong Chen, Guanglin Li
Surface electromyography pattern recognition methods have been widely applied to decode limb movement intentions for prosthesis control. These methods generally require amputees to provide sufficient myoelectric signals from their residual limb muscles. Previous studies have shown that amputees with high level amputation or neuromuscular disorder usually do not have sufficient residual limb muscles to provide enough myoelectric signals for accurate identification of limb movements. Electroencephalography (EEG), another bioelectric signal associated with limb movements has also been proposed and used for decoding the limb motion intents of humans...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29060299/using-non-iterative-methods-and-random-weight-networks-to-classify-upper-limb-movements-through-semg-signals
#17
Vinicius H Cene, Gabriela Favieiro, Alexandre Balbinot
This paper presents the use of two non-iterative methods to perform the classification of 17 different upper-limb movements through sEMG signal processing. The two methods were compared with a SVM classifier using three different databases involving amputee subjects. The non-iterative methods presented equivalent or superior classification accuracy than SVM method. Thereafter a stage of PCA pre-processing method was used in order to promote a better class separation prior the non-iterative classifiers. The best accuracy result without PCA was achieved by the Regularized Extreme Learning Machines algorithm (88,4% for non-amputee subjects and 79,4% for the amputee)...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29060272/a-64-channels-neural-interface-for-biopotentials-recording-and-pns-stimulation
#18
Lorenzo Bisoni, Caterina Carboni, Roberto Puddu, Gianluca Barabino, Danilo Pani, Luigi Raffo, Matthias Mueller, Thomas Stieglitz, Jaume Del Valle, Natalia de la Oliva, Ignacio Delgado-Martinez, Xavier Navarro, Massimo Barbaro
A biomedical interface that combines into a single and compact device the recording of biopotentials and the electrical stimulation of neural fibres is presented. It is intended for enabling the control over a robotic hand and for restoring the sensory feedback in amputees by directly interfacing the peripheral nervous system (PNS) in closed-loop. A modular system consisting in one or more independent 16-channels bidirectional units was conceived. Each module is based on three 0.35μm bulk-CMOS integrated circuits (ICs): a recording unit, a High-Voltage (HV) stimulator and a HV booster...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29059921/cortical-response-of-the-projected-thumb-tactile-sensation-under-tens-by-meg
#19
Y Chen, M N Li, C Y Cao, X L Zhu, X H Sui
The existence of projected finger territories (PFTs) near the stump provides an essential way to realize the tactile sensation of lost fingers by transcutaneous electrical nerve stimulation (TENS). After amputation, the somatosensory cortex corresponding to lost fingers might be invaded by other cortical areas due to cortical plasticity. However, it was seldom observed how the amputees could feel the projected or lost finger tactile sensation in the cerebral cortex under TENS. To answer this question, by using magnetoencephalography (MEG), we investigated the cortical response under TENS of the projected thumb territory and normal thumb with 2 Hz current pulses...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29059893/emg-based-energy-expenditure-optimization-for-active-prosthetic-leg-tuning
#20
Roozbeh Atri, J Sebastian Marquez, Douglas Murphy, Ashraf Gorgey, DingYu Fei, John Fox, William Lovegreen, Ou Bai
In recent years, active prosthetic legs have been developed and deployed commercially that help amputees to initiate gait with less effort and more symmetry in the pattern. However, the process of initial set up and tuning is highly time and cost consuming. It requires prosthetic experts to observe the gait and the feedback from amputees to manually tune the parameters subjectively. In this study, an electromyography (EMG)-based energy expenditure optimization method was presented to automatically tune the prosthetic limb...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
keyword
keyword
9815
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"