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https://www.readbyqxmd.com/read/28105954/the-amp-foot-3-new-generation-propulsive-prosthetic-feet-with-explosive-motion-characteristics-design-and-validation
#1
Pierre Cherelle, Victor Grosu, Manuel Cestari, Bram Vanderborght, Dirk Lefeber
The last decades, rehabilitation has become a challenging context for mechatronical engineering. From the state-of-the-art it is seen that the field of prosthetics offers very promising perspectives to roboticist. Today's prosthetic feet tend to improve amputee walking experience by delivering the necessary push-off forces while walking. Therefore, several new types of (compliant) actuators are developed in order to fulfill the torque and power requirements of a sound ankle-foot complex with minimized power consumption...
December 19, 2016: Biomedical Engineering Online
https://www.readbyqxmd.com/read/28105953/a-powered-prosthetic-ankle-joint-for-walking-and-running
#2
Martin Grimmer, Matthew Holgate, Robert Holgate, Alexander Boehler, Jeffrey Ward, Kevin Hollander, Thomas Sugar, André Seyfarth
BACKGROUND: Current prosthetic ankle joints are designed either for walking or for running. In order to mimic the capabilities of an able-bodied, a powered prosthetic ankle for walking and running was designed. A powered system has the potential to reduce the limitations in range of motion and positive work output of passive walking and running feet. METHODS: To perform the experiments a controller capable of transitions between standing, walking, and running with speed adaptations was developed...
December 19, 2016: Biomedical Engineering Online
https://www.readbyqxmd.com/read/28105948/active-lower-limb-prosthetics-a-systematic-review-of-design-issues-and-solutions
#3
REVIEW
Michael Windrich, Martin Grimmer, Oliver Christ, Stephan Rinderknecht, Philipp Beckerle
This paper presents a review on design issues and solutions found in active lower limb prostheses. This review is based on a systematic literature search with a methodical search strategy. The search was carried out across four major technical databases and the retrieved records were screened for their relevance. A total of 21 different active prostheses, including 8 above-knee, 9 below-knee and 4 combined knee-ankle prostheses were identified. While an active prosthesis may help to restore the functional performance of an amputee, the requirements regarding the actuation unit as well as for the control system are high and the development becomes a challenging task...
December 19, 2016: Biomedical Engineering Online
https://www.readbyqxmd.com/read/28105945/assessment-of-transfemoral-amputees-using-a-passive-microprocessor-controlled-knee-versus-an-active-powered-microprocessor-controlled-knee-for-level-walking
#4
Veerle Creylman, Ingrid Knippels, Paul Janssen, Evelyne Biesbrouck, Knut Lechler, Louis Peeraer
BACKGROUND: In transfemoral (TF) amputees, the forward propulsion of the prosthetic leg in swing has to be mainly carried out by hip muscles. With hip strength being the strongest predictor to ambulation ability, an active powered knee joint could have a positive influence, lowering hip loading and contributing to ambulation mobility. To assess this, gait of four TF amputees was measured for level walking, first while using a passive microprocessor-controlled prosthetic knee (P-MPK), subsequently while using an active powered microprocessor-controlled prosthetic knee (A-MPK)...
December 19, 2016: Biomedical Engineering Online
https://www.readbyqxmd.com/read/28104246/overcoming-the-limitations-of-the-harmonic-ratio-for-the-reliable-assessment-of-gait-symmetry
#5
Ilaria Pasciuto, Elena Bergamini, Marco Iosa, Giuseppe Vannozzi, Aurelio Cappozzo
The Harmonic Ratio (HR) is an index based on the spectral analysis of lower trunk accelerations that is commonly used to assess the quality of gait. However, it presents several issues concerning reliability and interpretability. As a consequence, the literature provides very different values albeit corresponding to the same populations. In the present work, an improved harmonic ratio (iHR) was defined, relating the power of the intrinsic harmonics (i.e. associated with the symmetric component of gait) to the total power of the signal for each stride, leading to a normalised index ranging from 0 to 100%...
January 7, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28103760/the-use-of-a-direct-manufacturing-prosthetic-socket-system-in-a-rural-community-in-south-africa-a-pilot-study-and-lessons-for-future-research
#6
Liezel Ennion, Anton Johannesson, Anthea Rhoda
BACKGROUND: Challenges exist with the provision of appropriate mobility assistive devices in rural areas. The use of the direct manufacturing prosthetic socket system is a possible solution to these challenges. OBJECTIVES: The objective of this study was to test and explore the clients' perspectives with the application of this device. STUDY DESIGN: Within a mixed-methods approach, a longitudinal sequential explanatory design was applied. METHODS: The Orthotic and Prosthetic User's Survey was administered to explore the use of the direct manufacturing prosthetic socket system in terms of function, health-related quality of life and client satisfaction...
January 1, 2017: Prosthetics and Orthotics International
https://www.readbyqxmd.com/read/28100097/spina-bifida-and-lower-limb-amputation-in-northern-ireland-a-retrospective-study-of-demographics-and-outcome
#7
Lorraine Graham
BACKGROUND: Spina bifida is an uncommon cause for lower limb amputation. The causes and level of amputation and mobility outcome for these patients have not been reported previously. CASE DESCRIPTION: To identify the causes and level of amputation and the mobility outcome for amputee patients with spina bifida. STUDY DESIGN: Retrospective case series. METHODS: Chart review of patients identified by computer as having an amputation secondary to neurological or congenital cause...
January 1, 2017: Prosthetics and Orthotics International
https://www.readbyqxmd.com/read/28095358/axial-and-torsional-stiffness-of-pediatric-prosthetic-feet
#8
Paolo Taboga, Alena M Grabowski
BACKGROUND: Prosthetic stiffness likely affects the walking biomechanics of toddlers and children with leg amputations, but the actual stiffness values for prostheses are not reported by manufacturers or in standardized testing procedures. AIM: We measured axial (kA) and torsional (kT) stiffness from four brands of pediatric prosthetic feet (Trulife, Kingsley Mfg. Co., TRS Incorporated, and College Park Industries) over a range of foot sizes. METHODS: We applied forces and torques onto prostheses with a materials testing machine that replicated those exhibited in vivo by using the kinetics measured from four non-amputee toddlers (2-3years) during walking...
January 5, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28094687/successful-management-of-femoral-trauma-in-a-through-knee-amputee-with-a-previous-malunited-fracture-implications-and-functional-outcome
#9
Beth Lineham, Paul Harwood, Peter Giannoudis
BACKGROUND: After amputation patients are more likely to injure their residual limb. An injury of a previously amputated limb, especially if the residuum is not anatomically normal, poses a dilemma for management. Case Description and Methods: This case report discusses a femoral fracture sustained proximal to a through-knee amputation. Findings and outcomes: The fracture was at the site of a malunited fracture. A shortening osteotomy with bone graft was undertaken to improve alignment and prosthetic fit and remove poor-quality bone...
January 1, 2017: Prosthetics and Orthotics International
https://www.readbyqxmd.com/read/28094681/relationship-between-body-height-and-spatiotemporal-parameters-during-a-100-m-sprint-in-able-bodied-and-unilateral-transtibial-sprinters
#10
Hiroaki Hobara, Wolfgang Potthast, Ralf Müller, Yoshiyuki Kobayashi, Satoru Hashizume, Thijs A Herdoorn, Masaaki Mochimaru
BACKGROUND: Although anthropometric factors could influence sprint performance in able-bodied sprinters, little is known about the relationships between these anthropometric factors and sprint performance in amputee sprinters. OBJECTIVES: To investigate the relationships between body height and spatiotemporal parameters of 100-m sprints in unilateral transtibial amputee and able-bodied sprinters. STUDY DESIGN: This is a cross-sectional study...
January 1, 2017: Prosthetics and Orthotics International
https://www.readbyqxmd.com/read/28094580/is-walking-symmetry-important-for-ambulatory-patients-with-spinal-cord-injury
#11
Makamas Kumprou, Pipatana Amatachaya, Thanat Sooknuan, Thiwabhorn Thaweewannakij, Sugalya Amatachaya
PURPOSE: To assess and compare the levels of walking symmetry in ambulatory participants with spinal cord injury (SCI) who had different degrees of lesion severity, levels of walking ability, and fall history. In addition, the study explored the relationship between the levels of walking symmetry and variables related to the ability of well-controlled walking of the participants. STUDY DESIGN: Cross-sectional study. METHODS: Sixty-six eligible participants were assessed and interviewed for levels of walking symmetry, walking speed, functional endurance, symmetrical lower limb support ability, balance control, and fall history over the last 6 months...
January 17, 2017: Disability and Rehabilitation
https://www.readbyqxmd.com/read/28091278/brief-activity-performance-measure-for-upper-limb-amputees-bam-ula
#12
Linda Resnik, Matthew Borgia, Frantzy Acluche
BACKGROUND: Measures of activity performance for adults with upper limb amputation are needed. The purposes of this study were to evaluate the measurement properties of a new measure of activity performance for adults with upper limb amputation, which we call the Brief Activity Measure for Upper Limb Amputees (BAM-ULA) and to compare BAM-ULA scores for users of different types of prostheses. METHODS: In all, 35 persons with upper limb amputation were administered the BAM-ULA, twice within 1 week...
January 1, 2017: Prosthetics and Orthotics International
https://www.readbyqxmd.com/read/28088938/clinical-analysis-of-54-cases-of-large-area-soft-tissue-avulsion-in-the-lower-limb
#13
Yu Chen, Lei Liu
OBJECTIVE: To assess the clinical curative effect of different treatment methods for large area avulsion injury in the lower limb. METHODS: Between January 2010 and December 2013, 54 patients with large area avulsion injury in the lower limb were treated in the trauma center of our hospital, including 34 males and 20 females with a mean age of 35.7 years (range, 16-65 years). The injury mechanism was traffic accident in 44 cases, hitting by heavy objects in 8 cases, and fall from height in 2 cases, involving 31 thighs, 19 legs and 4 feet involved...
December 1, 2016: Chinese Journal of Traumatology, Zhonghua Chuang Shang za Zhi
https://www.readbyqxmd.com/read/28081030/ultrasound-findings-of-young-and-traumatic-amputees-with-lower-extremity-residual-limb-pain-in-turkey
#14
Koray Aydemir, Yasin Demir, Ümüt Güzelküçük, Kutay Tezel, Bilge Yilmaz
OBJECTIVE: The current study was designed to document clinical and ultrasound (US) findings of patients with residual limb pain (RLP) after amputation and to investigate the relationship between these findings. MATERIALS AND METHODS: A chart review was performed to identify demographic and clinical data including the age (current and at the time of injury), time since amputation, gender, reason for amputation, affected limb number, side and level of limb loss, and ultrasonographic findings of young and traumatic amputees with RLP...
January 9, 2017: American Journal of Physical Medicine & Rehabilitation
https://www.readbyqxmd.com/read/28078196/prosthetic-jamming-terminal-device-a-case-study-of-untethered-soft-robotics
#15
Nadia Cheng, John Amend, Todd Farrell, Debra Latour, Carlos Martinez, Jen Johansson, Anthony McNicoll, Marek Wartenberg, Samuel Naseef, William Hanson, William Culley
This article illuminates the major and often overlooked challenge of untethering soft robotic systems through the context of recent work, in which soft robotic gripper technology enabled by jamming of granular media was applied to a prosthetic jamming terminal device (PJTD). The PJTD's technical and market feasibility was evaluated in a pilot study with two upper-limb amputees. A PJTD prototype was tested against a commercial device (Motion Control electric terminal service with a one degree-of-freedom pinching mechanism) using two existing hand function tests: the first quantified the device's speed in picking and placing small blocks and the second evaluated a person's ability to perform activities of daily living (ADLs)...
December 1, 2016: Soft Robotics
https://www.readbyqxmd.com/read/28076293/electromyographic-classification-of-effort-in-muscle-strength-assessment
#16
Karan Veer, Tanu Sharma
Dual-channel evaluation of surface electromyogram (SEMG) signals acquired from amputee subjects using computational techniques for classification of arm motions is presented in this study. SEMG signals were classified by the neural network (NN) and interpretation was done using statistical techniques to extract the effectiveness of the recorded signals. From the results, it was observed that there exists a calculative difference in amplitude gain across different motions and that SEMG signals have great potential to classify arm motions...
January 11, 2017: Biomedizinische Technik. Biomedical Engineering
https://www.readbyqxmd.com/read/28070628/osseointegrated-prosthetic-limb-for-the-treatment-of-lower-limb-amputations-experience-and-outcomes
#17
Munjed Al Muderis, William Lu, Jiao Jiao Li
BACKGROUND: Osseointegration has emerged over the past two decades as a dramatically different approach for the treatment of lower limb amputations, which involves direct attachment of the prosthesis to the skeletal residuum. This approach can address many of the socket-interface issues associated with socket prostheses which represent the current standard of care for amputees. The Osseointegrated Prosthetic Limb (OPL) is an osseointegration implant with a new design and improved features compared to other available implant systems...
January 9, 2017: Der Unfallchirurg
https://www.readbyqxmd.com/read/28068847/case-study-survey-of-patient-satisfaction-with-prosthesis-quality-and-design-among-below-knee-prosthetic-leg-socket-users
#18
Nurhanisah Mohd Hawari, Mohammad Jawaid, Paridah Md Tahir, Raja Ahmad Azmeer
The aim of this case study was to explore patient satisfaction with the quality of prosthetic leg sockets intended for persons with lower limb amputations. A qualitative study based on in-depth interviews, preceded by a questionnaire session, was carried out with patients from the Rehabilitation Center and Hospital in Malaysia. Twelve out-patient and in-patient amputees with lower limb amputations, specifically below-knee amputations, were chosen randomly. The analysis of patients' narratives aimed to identify the functional and esthetic characteristics of currently used prosthetic leg sockets and any problems related to them...
January 10, 2017: Disability and Rehabilitation. Assistive Technology
https://www.readbyqxmd.com/read/28067120/standing-balance-in-people-with-trans-tibial-amputation-due-to-vascular-causes-a-literature-review
#19
Mayank Seth, Eric Lamberg
BACKGROUND: Balance is an important variable to consider during the rehabilitation process of individuals with trans-tibial amputation. Limited evidence exists on the balance abilities of people with trans-tibial amputation due to vascular causes. OBJECTIVE: The purpose of this article is to review literature and determine if standing balance is diminished in people with trans-tibial amputation due to vascular causes. STUDY DESIGN: Literature review...
January 1, 2017: Prosthetics and Orthotics International
https://www.readbyqxmd.com/read/28066531/radiographic-assessment-of-extremity-osseointegration-for-the-amputee
#20
Munjed Al Muderis, Belinda A Bosley, Anthony V Florschutz, Paul A Lunseth, Tyler D Klenow, M Jason Highsmith, Jason T Kahle
Osseointegration (OI) is a bone-anchoring procedure that allows the direct skeletal attachment of a prosthesis through the use of an implant. Transcutaneous OI implants are similar to subcutaneous intramedullary joint implants with some exceptions. Particularly, OI implants are inserted at the distal aspect of the femur, while intramedullary implants are inserted at the proximal aspect of the femur. In this report, an additional adaptation of the radiographic zonal analysis used for intramedullary implants, known as Gruen zones, is introduced to include OI implants of extremity prosthetics...
September 2016: Technology and Innovation
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