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https://www.readbyqxmd.com/read/28318387/a-qualitative-study-of-the-challenges-of-providing-pre-prosthetic-rehabilitation-in-rural-south-africa
#1
Liezel Ennion, Anton Johannesson Johannesson
BACKGROUND: There is a known shortage of rehabilitation staff in rural settings and a sharp increase in the number of lower limb amputations being performed. A lack of adequate pre-prosthetic rehabilitation will result in worse physical and psychological outcomes for a person with a lower limb amputation, and they will not be eligible to be fitted with a prosthesis. OBJECTIVE: To explore therapists' experiences with providing pre-prosthetic rehabilitation in a rural setting...
March 1, 2017: Prosthetics and Orthotics International
https://www.readbyqxmd.com/read/28316270/the-prosthetist-role-expectations-scale-development-and-initial-validation-of-a-scale-for-clinical-settings
#2
Renee L Mackenzie, Meg E Morris, Gregory Murphy, Margaret C Hodge
BACKGROUND: The role of the prosthetist has changed substantially over the past century. In the transition from 'limb-maker' to 'clinician', the expectations of prosthetics professionals have also changed. OBJECTIVES: To develop and test a new scale capable of assessing and comparing current expectations of the roles of the prosthetist. STUDY DESIGN: Scale development and validation. METHODS: A new scale was constructed in accordance with Organizational Role Theory...
March 1, 2017: Prosthetics and Orthotics International
https://www.readbyqxmd.com/read/28293984/hip-prosthesis-in-sitting-posture-for-bilateral-transfemoral-amputee-after-burn-injury-a-case-report
#3
Yukiyo Shimizu, Hirotaka Mutsuzaki, Takayuki Maezawa, Yuji Idei, Kazuya Takao, Ryoko Takeuchi, Shinzo Onishi, Yasushi Hada, Masashi Yamazaki, Yasuyoshi Wadano
BACKGROUND: To overcome the challenges of rehabilitation of bilateral transfemoral amputees, we developed a novel "hip prosthesis in the sitting posture." Case Description and Methods: A 64-year-old male bilateral transfemoral amputee was transferred for rehabilitation 4 months following a burn injury. His wounds remained unhealed for 20 months; thus, he was unable to participate in standing training with the standard prosthetic sockets. Hip prosthesis in the sitting posture has very little friction between the sockets and residual limbs, which facilitated our patient to begin standing and walking exercises...
December 1, 2016: Prosthetics and Orthotics International
https://www.readbyqxmd.com/read/28287007/validation-of-the-virtual-elevation-field-test-method-when-assessing-the-aerodynamics-of-para-cyclists-with-a-uni-lateral-trans-tibial-amputation
#4
Bryce Dyer, B Xavier Disley
Lower-limb amputees typically require some form of prosthetic limb to ride a bicycle for recreation or when competing. At elite-level racing speeds, aerodynamic drag can represent the majority of the resistance acting against a cyclists' forward motion. As a result, the reduction of such resistance is beneficial to an amputee whereby the form and function of the prosthetic limb can be optimized through engineering. To measure the performance of such limbs, field testing provides a cost-effective and context-specific method of aerodynamic drag measurement...
March 12, 2017: Disability and Rehabilitation. Assistive Technology
https://www.readbyqxmd.com/read/28286462/systematic-review-of-studies-examining-transtibial-prosthetic-socket-pressures-with-changes-in-device-alignment
#5
REVIEW
Philip Davenport, Siamak Noroozi, Philip Sewell, Saeed Zahedi
Suitable lower-limb prosthetic sockets must provide an adequate distribution of the pressures created from standing and ambulation. A systematic search for articles reporting socket pressure changes in response to device alignment perturbation was carried out, identifying 11 studies. These were then evaluated using the American Academy of Orthotists and Prosthetists guidelines for a state-of-the-science review. Each study used a design where participants acted as their own controls. Results were available for 52 individuals and five forms of alignment perturbation...
2017: Journal of Medical and Biological Engineering
https://www.readbyqxmd.com/read/28285881/finite-element-analysis-of-the-amputated-lower-limb-a-systematic-review-and-recommendations
#6
REVIEW
A S Dickinson, J W Steer, P R Worsley
The care and rehabilitation of individuals after lower limb amputation presents a substantial and growing socioeconomic challenge. Clinical outcome is closely linked to successful functional rehabilitation with a prosthetic limb, which depends upon comfortable prosthetic limb - residual limb load transfer. Despite early interest in the 1980s, the amputated limb has received considerably less attention in computational biomechanical analysis than other subjects, such as arthroplasty. This systematic literature review investigates the state of the art in residual limb finite element analysis published since 2000...
March 9, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28280845/-function-of-prosthesis-components-in-lower-limb-amputees-with-bone-anchored-percutaneous-implants-biomechanical-aspects
#7
S Blumentritt
BACKGROUND: Bone anchorage of an artificial limb has been proven to be an alternative intervention for amputees when prosthesis use is seriously reduced because of stump problems. Little is known about how prosthesis components interact with bone and joints and which potential the optimum use provides with respect to quality of treatment of leg amputees. OBJECTIVE: Does osseointegration influence the motor activity of residual limbs differently compared with socket prostheses? How should prosthesis components be aligned? What type of prosthetic knee joints should be preferred in transfemoral amputees? MATERIAL AND METHODS: Transfer of biomechanical knowledge of socket prosthetics to bone-anchored prostheses...
March 9, 2017: Der Unfallchirurg
https://www.readbyqxmd.com/read/28278172/the-influence-of-a-hydraulic-prosthetic-ankle-on-residual-limb-loading-during-sloped-walking
#8
Sara R Koehler-McNicholas, Eric A Nickel, Joseph Medvec, Kyle Barrons, Spencer Mion, Andrew H Hansen
In recent years, numerous prosthetic ankle-foot devices have been developed to address the demands of sloped walking for individuals with lower-limb amputation. The goal of this study was to compare the performance of a passive, hydraulic ankle-foot prosthesis to two related, non-hydraulic ankles based on their ability to minimize the socket reaction moments of individuals with transtibial amputation during a range of sloped walking tasks. After a two-week accommodation period, kinematic data were collected on seven subjects with a transtibial amputation walking on an instrumented treadmill set at various slopes...
2017: PloS One
https://www.readbyqxmd.com/read/28275847/the-compress%C3%A2-transcutaneous-implant-for-rehabilitation-following-limb-amputation
#9
R L McGough, M A Goodman, R L Randall, J A Forsberg, B K Potter, B Lindsey
Amputation is an unfortunate outcome of a variety of orthopedic conditions. Many amputees can be functionally fitted with conventional suspension sockets. A substantial subset, however, fails this conventional treatment and is unable to function. In Europe, an alternative to socket-based prostheses has been available for 25 years. Patients there who are unable to functionally use socket-based prostheses have been offered the possibility for transcutaneous osseointegration. With this technology, the prosthetic limb can be rigidly attached to the residual bone, and the socket is eliminated, in many cases enabling improved function and patient satisfaction...
March 8, 2017: Der Unfallchirurg
https://www.readbyqxmd.com/read/28269492/classification-of-non-weight-bearing-lower-limb-movements-towards-a-potential-treatment-for-phantom-limb-pain-based-on-myoelectric-pattern-recognition
#10
Eva Lendaro, Max Ortiz-Catalan
Research in myoelectric pattern recognition (MPR) for the prediction of motor volition has primarily focused on the upper limbs. Recent studies in the lower limbs have mainly concentrated on prosthetic control, while MPR for lower limb rehabilitation purposes has received little attention. In this work we investigated the viability of a MPR system for the prediction of four degrees of freedom controlled in a near natural or physiologically appropriate fashion. We explored three different electrode configurations for acquiring electromyographic (EMG) signals: two targeted (bipolar and monopolar) and one untargeted (electrodes equally spaced axially)...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28269411/preliminary-results-for-an-adaptive-pattern-recognition-system-for-novel-users-using-a-powered-lower-limb-prosthesis
#11
John A Spanias, Ann M Simon, Eric J Perreault, Levi J Hargrove
Powered prosthetic legs are capable of improving the gait of lower limb amputees. Pattern recognition systems for these devices allow amputees to transition between different locomotion modes in a way that is seamless and transparent to the user. However, the potential of these systems is diminished because they require large amounts of training data that is burdensome to collect. To reduce the effort required to acquire these data, we developed an adaptive pattern recognition system that automatically learns from subject-specific data as the user is ambulating...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28269407/real-time-gait-event-detection-for-lower-limb-amputees-using-a-single-wearable-sensor
#12
H F Maqbool, M A B Husman, M I Awad, A Abouhossein, P Mehryar, N Iqbal, A A Dehghani-Sanij
This paper presents a rule-based real-time gait event/phase detection system (R-GEDS) using a shank mounted inertial measurement unit (IMU) for lower limb amputees during the level ground walking. Development of the algorithm is based on the shank angular velocity in the sagittal plane and linear acceleration signal in the shank longitudinal direction. System performance was evaluated with four control subjects (CS) and one transfemoral amputee (TFA) and the results were validated with four FlexiForce footswitches (FSW)...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28269404/a-feasibility-study-of-depth-image-based-intent-recognition-for-lower-limb-prostheses
#13
Huseyin Atakan Varol, Yerzhan Massalin
This paper presents our preliminary work on a depth camera based intent recognition system intended for future use in robotic prosthetic legs. The approach infers the activity mode of the subject for standing, walking, running, stair ascent and stair descent modes only using data from the depth camera. Depth difference images are also used to increase the performance of the approach by discriminating between static and dynamic instances. After confidence map based filtering, simple features such as mean, maximum, minimum and standard deviation are extracted from rectangular regions of the frames...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28269380/hand-motion-recognition-based-on-forearm-deformation-measured-with-a-distance-sensor-array
#14
Sung-Gwi Cho, Masahiro Yoshikawa, Kohei Baba, Kazunori Ogawa, Jun Takamatsu, Tsukasa Ogasawara
Studies of upper limb motion analysis using surface electromyogram (sEMG) signals measured from the forearm plays an important role in various applications, such as human interfaces for controlling robotic exoskeletons, prosthetic hands, and evaluation of body functions. Though the sEMG signals have a lot of information about the activities of the muscles, the signals do not have the activities of the deep layer muscles. We focused on forearm deformation, since hand motion brings the muscles, tendons, and skeletons under the skin...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28269305/biologically-inspired-multi-layered-synthetic-skin-for-tactile-feedback-in-prosthetic-limbs
#15
Luke Osborn, Harrison Nguyen, Joseph Betthauser, Rahul Kaliki, Nitish Thakor
The human body offers a template for many state-of-the-art prosthetic devices and sensors. In this work, we present a novel, sensorized synthetic skin that mimics the natural multi-layered nature of mechanoreceptors found in healthy glabrous skin to provide tactile information. The multi-layered sensor is made up of flexible piezoresistive textiles that act as force sensitive resistors (FSRs) to convey tactile information, which are embedded within a silicone rubber to resemble the compliant nature of human skin...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28268993/real-time-ultrasound-based-control-of-a-virtual-hand-by-a-trans-radial-amputee
#16
Clayton A Baker, Nima Akhlaghi, Huzefa Rangwala, Jana Kosecka, Siddhartha Sikdar
Advancements in multiarticulate upper-limb prosthetics have outpaced the development of intuitive, non-invasive control mechanisms for implementing them. Surface electromyography is currently the most popular non-invasive control method, but presents a number of drawbacks including poor deep-muscle specificity. Previous research established the viability of ultrasound imaging as an alternative means of decoding movement intent, and demonstrated the ability to distinguish between complex grasps in able-bodied subjects via imaging of the anterior forearm musculature...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28268750/a-wearable-skin-stretch-haptic-feedback-device-towards-improving-balance-control-in-lower-limb-amputees
#17
M A B Husman, H F Maqbool, M I Awad, A Abouhossein, A A Dehghani-Sanij
Haptic feedback to lower limb amputees is essential to maximize the functionality of a prosthetic device by providing information to the user about the interaction with the environment and the position of the prostheses in space. Severed sensory pathway and the absence of connection between the prosthesis and the Central Nervous System (CNS) after lower limb amputation reduces balance control, increases visual dependency and increases risk of falls among amputees. This work describes the design of a wearable haptic feedback device for lower limb amputees using lateral skin-stretch modality intended to serve as a feedback cue during ambulation...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28268728/a-pressure-and-shear-sensing-liner-for-prosthetic-sockets
#18
Jason Wheeler, Anirban Mazumdar, Lisa Marron, Kevin Dullea, Joan Sanders, Kate Allyn
Interface pressures are closely related to the comfort and fit of a lower-limb prosthetic socket and clinicians and researchers are interested in monitoring these loads. In particular, shear stresses at the socket/liner interface are indicative of important fit characteristics but are difficult to measure in situ. We have developed an elastomeric liner with sixteen integrated pressure and shear sensors, along with necessary wiring and data acquisition electronics. The sensors measure three-axis pressures using optical emitter/detector pairs coupled with transparent and opaque elastomeric layers...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28261085/translating-research-on-myoelectric-control-into-clinics-are-the-performance-assessment-methods-adequate
#19
Ivan Vujaklija, Aidan D Roche, Timothy Hasenoehrl, Agnes Sturma, Sebastian Amsuess, Dario Farina, Oskar C Aszmann
Missing an upper limb dramatically impairs daily-life activities. Efforts in overcoming the issues arising from this disability have been made in both academia and industry, although their clinical outcome is still limited. Translation of prosthetic research into clinics has been challenging because of the difficulties in meeting the necessary requirements of the market. In this perspective article, we suggest that one relevant factor determining the relatively small clinical impact of myocontrol algorithms for upper limb prostheses is the limit of commonly used laboratory performance metrics...
2017: Frontiers in Neurorobotics
https://www.readbyqxmd.com/read/28259464/a-general-model-for-estimating-lower-extremity-inertial-properties-of-individuals-with-transtibial-amputation
#20
Abbie E Ferris, Jeremy D Smith, Gary D Heise, Richard N Hinrichs, Philip E Martin
Lower extremity joint moment magnitudes during swing are dependent on the inertial properties of the prosthesis and residual limb of individuals with transtibial amputation (TTA). Often, intact limb inertial properties (INTACT) are used for prosthetic limb values in an inverse dynamics model even though these values overestimate the amputated limb's inertial properties. The purpose of this study was to use subject-specific (SPECIFIC) measures of prosthesis inertial properties to generate a general model (GENERAL) for estimating TTA prosthesis inertial properties...
January 31, 2017: Journal of Biomechanics
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