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Limb prosthesis

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https://www.readbyqxmd.com/read/29144392/design-and-development-of-a-novel-upper-limb-cycling-prosthesis
#1
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/29126767/the-quality-of-life-analysis-of-knee-prosthesis-with-complete-microprocessor-control-in-trans-femoral-amputees
#2
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/29119860/cost-effectiveness-of-bone-anchored-prostheses-using-osseointegrated-fixation-myth-or-reality
#3
Laurent Alain Frossard, Gregory Merlo, Brendan Burkett, Tanya Quincey, Debra Berg
BACKGROUND: In principle, lower limb bone-anchored prostheses could alleviate expenditure associated with typical socket manufacturing and residuum treatments due to socket-suspended prostheses. OBJECTIVE: This study reports (a) the incremental costs and (b) heath gain as well as (c) cost-effectiveness of bone-anchored prostheses compared to socket-suspended prostheses. STUDY DESIGN: Retrospective individual case-controlled observations and systematic review...
November 1, 2017: Prosthetics and Orthotics International
https://www.readbyqxmd.com/read/29118699/performance-and-usability-of-various-robotic-arm-control-modes-from-human-force-signals
#4
Sébastien Mick, Daniel Cattaert, Florent Paclet, Pierre-Yves Oudeyer, Aymar de Rugy
Elaborating an efficient and usable mapping between input commands and output movements is still a key challenge for the design of robotic arm prostheses. In order to address this issue, we present and compare three different control modes, by assessing them in terms of performance as well as general usability. Using an isometric force transducer as the command device, these modes convert the force input signal into either a position or a velocity vector, whose magnitude is linearly or quadratically related to force input magnitude...
2017: Frontiers in Neurorobotics
https://www.readbyqxmd.com/read/29116866/functional-changes-through-the-usage-of-3d-printed-transitional-prostheses-in-children
#5
Jorge M Zuniga, Jean L Peck, Rakesh Srivastava, James E Pierce, Drew R Dudley, Nicholas A Than, Nicholas Stergiou
INTRODUCTION: There is limited knowledge on the use of 3 D-printed transitional prostheses, as they relate to changes in function and strength. Therefore, the purpose of this study was to identify functional and strength changes after usage of 3 D-printed transitional prostheses for multiple weeks for children with upper-limb differences. MATERIALS AND METHODS: Gross manual dexterity was assessed using the Box and Block Test and wrist strength was measured using a dynamometer...
November 8, 2017: Disability and Rehabilitation. Assistive Technology
https://www.readbyqxmd.com/read/29113159/treatment-of-osteosarcoma-around-the-knee-in-skeletally-immature-patients
#6
Weitao Yao, Qiqing Cai, Jiaqiang Wang, Songtao Gao
Limb sparing surgery in growing young patients with malignant tumors is difficult as invasion of the physis by the tumor or surgical resection through the metaphysis may cause significant limb discrepancy following surgery. At present, hinged tumor prosthesis or biological reconstructions are the main methods following tumor resection in these patients. The aim of the present study was to assess different procedures for the treatment of osteosarcoma around knee joints in immature patients. A retrospective study of 56 patients (<15 years old, open physis) who had been treated for osteosarcoma around the knee joint between January 2007 and December 2015 was performed...
November 2017: Oncology Letters
https://www.readbyqxmd.com/read/29111608/approach-for-gait-analysis-in-persons-with-limb-loss-including-residuum-and-prosthesis-socket-dynamics
#7
A K LaPrè, M Price, R Wedge, B R Umberger, F Sup
Musculoskeletal modeling and marker based motion capture techniques are commonly used to quantify the motions of body segments, and the forces acting on them during human gait. However, when these techniques are applied to analyze the gait of people with lower limb loss, the clinically relevant interaction between the residual limb and prosthesis socket is typically overlooked. It is known that there is considerable motion and loading at the residuum-socket interface, yet traditional gait analysis techniques do not account for these factors due to the inability to place tracking markers on the residual limb inside of the socket...
November 7, 2017: International Journal for Numerical Methods in Biomedical Engineering
https://www.readbyqxmd.com/read/29101394/interactions-between-transfemoral-amputees-and-a-powered-knee-prosthesis-during-load-carriage
#8
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/29098745/prosthodontic-management-of-a-patient-with-moebius-syndrome-a-clinical-report
#9
Ahmed Mahrous, Ghadeer Thalji
Moebius/Mӧbius Syndrome (MS) is an extremely rare congenital disorder characterized by uni- or bilateral palsy of the abducens (VI) and the facial (VII) nerves, causing facial paralysis. Dysfunction of cranial nerves III through XII is common, most often the glossopharyngeal (IX) and hypoglossus (XII). Afflicted individuals seeking prosthodontic care, particularly removable prosthetics, present multiple challenges related to inherent facial and tongue muscle weakness and microstomia. Other extraoral anomalies may include congenital multiple arthrogryposis and malformations of the upper and lower limbs...
November 3, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29092990/multiple-limb-salvage-attempts-for-diabetic-foot-infections-is-it-worth-it
#10
C C Hong, J H Tan, S H Lim, A Nather
AIMS: Limb salvage for diabetic foot infections often require multiple procedures. Some patients will eventually end up with below knee amputation (BKA) when all limb salvage attempts fail. We seek to study the patients' ability to return to normal life, functional status, prosthesis usage and perspectives on multiple limb salvage procedures that culminated in BKA to review if they would undertake a similar path if their situation was repeated. PATIENTS AND METHODS: A total of 41 patients who underwent BKA between July 2011 and June 2013 were reviewed...
November 2017: Bone & Joint Journal
https://www.readbyqxmd.com/read/29088353/upper-limb-cortical-maps-in-amputees-with-targeted-muscle-and-sensory-reinnervation
#11
Andrea Serino, Michel Akselrod, Roy Salomon, Roberto Martuzzi, Maria Laura Blefari, Elisa Canzoneri, Giulio Rognini, Wietske van der Zwaag, Maria Iakova, François Luthi, Amedeo Amoresano, Todd Kuiken, Olaf Blanke
Neuroprosthetics research in amputee patients aims at developing new prostheses that move and feel like real limbs. Targeted muscle and sensory reinnervation (TMSR) is such an approach and consists of rerouting motor and sensory nerves from the residual limb towards intact muscles and skin regions. Movement of the myoelectric prosthesis is enabled via decoded electromyography activity from reinnervated muscles and touch sensation on the missing limb is enabled by stimulation of the reinnervated skin areas. Here we ask whether and how motor control and redirected somatosensory stimulation provided via TMSR affected the maps of the upper limb in primary motor (M1) and primary somatosensory (S1) cortex, as well as their functional connections...
November 1, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/29081066/long-term-outcomes-of-cement-in-cement-technique-for-revision-endoprosthesis-surgery
#12
Nicholas M Bernthal, Vishal Hegde, Stephen D Zoller, Howard Y Park, Jason H Ghodasra, Daniel Johansen, Frederick Eilber, Fritz C Eilber, Chandhanarat Chandhanayingyong, Jeffrey J Eckardt
BACKGROUND AND OBJECTIVE: Cemented endoprosthetic reconstruction after resection of primary bone sarcomas has been a standard-of-care option for decades. With increased patient survival, the incidence of failed endoprostheses requiring revision surgery has increased. Revision of cemented endoprotheses by cementing into the existing cement mantle (CiC) is technically demanding. METHODS: This is a retrospective review of our endoprosthesis database of 512 consecutive cemented endoprosthetic reconstructions performed for oncologic diagnoses between 1980 and 2014...
October 29, 2017: Journal of Surgical Oncology
https://www.readbyqxmd.com/read/29077505/rate-of-and-factors-associated-with-ambulation-after-unilateral-major-lower-limb-amputation-at-an-urban-us-tertiary-care-hospital-with-a-multidisciplinary-limb-salvage-team
#13
Laura E Sansosti, Amanda Crowell, Eric T Choi, Andrew J Meyr
BACKGROUND: One relatively universal functional goal after major lower-limb amputation is ambulation in a prosthesis. This retrospective, observational investigation sought to 1) determine what percentage of patients successfully walked in a prosthesis within 1 year after major limb amputation and 2) assess which patient factors might be associated with ambulation at an urban US tertiary-care hospital. METHODS: A retrospective medical record review was performed to identify consecutive patients undergoing major lower-limb amputation...
September 2017: Journal of the American Podiatric Medical Association
https://www.readbyqxmd.com/read/29068573/en-bloc-resection-and-prosthesis-implantation-to-treat-malignant-fibrous-histiocytoma-of-the-humerus
#14
Jun Sun, Ru-Ming Zhang, Yu-Xin Zheng
BACKGROUND: Malignant fibrous histiocytoma (MFH) of the bone is a rare tumor. Most studies comparing limb salvage and amputation have reported that limb salvage had no adverse effect on the long-term survival of patients. This study evaluates the oncological outcomes of limb salvage procedures that were used for 15 patients with MFH of the humerus. OBJECTIVES: The aim of this study was to assess the functional and oncological outcomes of patients with malignant fibrous histiocytoma of the humerus after en bloc resection and prosthesis implantation...
August 2017: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
https://www.readbyqxmd.com/read/29067562/knee-implant-loosening-detection-a-vibration-analysis-investigation
#15
Arash Arami, Jean-Romain Delaloye, Hossein Rouhani, Brigitte M Jolles, Kamiar Aminian
Knee implant loosening is mainly caused by the weakness of the prosthesis-bone interface and is the main reason for surgical revisions. However, pre-operative diagnosis is difficult due to lack of accurate tests. In this study, we developed a vibration-based system to detect the loosening of the tibial implant of an instrumented knee prosthesis. The proposed system includes an instrumented vibrator for transcutaneous stimulation of the bone in a repeatable manner, and accelerometer sensors integrated into the implants to measure the propagated vibration...
October 24, 2017: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/29063283/-prosthesis-replacement-in-periprosthetic-humeral-fractures
#16
REVIEW
M Jaeger, D Maier, K Izadpanah, N P Südkamp
OBJECTIVE: Stabilization of the humerus with preservation or restoration of the shoulder function. INDICATIONS: Always in the presence of a loose prosthesis. It may become necessary in conditions of poor bone stock and if osteosynthesis is not possible. CONTRAINDICATIONS: Noncompliant patients due to alcohol or drugs. Local infections. SURGICAL TECHNIQUE: The loose implant is removed using an extended anterior deltopectoral approach...
October 23, 2017: Operative Orthopädie und Traumatologie
https://www.readbyqxmd.com/read/29062019/myoelectric-pattern-recognition-outperforms-direct-control-for-transhumeral-amputees-with-targeted-muscle-reinnervation-a-randomized-clinical-trial
#17
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
#18
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
#19
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/29048693/risk-factors-for-conversion-surgery-to-total-hip-arthroplasty-of-a-hemiarthroplasty-performed-for-a-femoral-neck-fracture
#20
Matthew J Grosso, Jonathan R Danoff, Ryan Thacher, Taylor S Murtaugh, Thomas R Hickernell, Roshan P Shah, William Macaulay
INTRODUCTION: The purpose of this study was to determine risk factors for conversion to total hip arthroplasty (THA) in patients originally treated with hemiarthroplasty (HA) for displaced femoral neck fractures. METHODS: In this case-controlled study, we identified 54 patients who were treated with HA for femoral neck fracture (FNF) who subsequently underwent conversion to THA at our institution between 2003 and 2013. We randomly selected 142 control patients who underwent HA for a displaced FNF without conversion surgery during the same time period...
October 16, 2017: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
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