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https://www.readbyqxmd.com/read/28914583/the-deka-hand-a-multifunction-prosthetic-terminal-device-patterns-of-grip-usage-at-home
#1
Linda Resnik, Frantzy Acluche, Matthew Borgia
BACKGROUND: Research is needed to understand how upper limb prosthesis users take advantage of multiple grip options. OBJECTIVES: To quantify usage of DEKA hand grip patterns during home use and compare patterns of usage at home to test sessions. STUDY DESIGN: Observational study design. METHODS: Data were collected from 21 subjects. Engineering data on grip were downloaded at various intervals. Proportion of time in each grip was calculated for the first 4 weeks of home use, later months, and test sessions (testing use) and compared statistically across intervals...
September 1, 2017: Prosthetics and Orthotics International
https://www.readbyqxmd.com/read/28905665/does-the-deka-arm-substitute-for-or-supplement-conventional-prostheses
#2
Linda Resnik, Frantzy Acluche, Shana Lieberman Klinger, Matthew Borgia
BACKGROUND: Research on home use of advanced upper limb prostheses is needed. OBJECTIVES: To describe and compare DEKA Arm usage patterns during the last 4 weeks of a home trial for participants with a personal prosthesis and those without. To compare usage patterns during home trial to those of the personal prosthesis prior to home trial. To evaluate user activity preferences for the DEKA Arm and personal prosthesis after a trial of home use. STUDY DESIGN: Quasi-experimental, time-series design...
September 1, 2017: Prosthetics and Orthotics International
https://www.readbyqxmd.com/read/28904639/a-comparison-of-functional-outcome-between-amputation-and-extension-prosthesis-in-the-treatment-of-congenital-absence-of-the-fibula-with-severe-limb-deformity
#3
P Calder, S Shaw, A Roberts, S Tennant, I Sedki, R Hanspal, D Eastwood
PURPOSE: Complete fibula absence often presents with significant lower-limb deformity. Parental counselling regarding management is paramount in achieving the optimum functional outcome. Amputation offers a single surgical event with minimal complications. This study compares outcomes with an amputation protocol to those using an extension prosthesis. METHOD: Thirty-two patients were identified. Nine patients (2 males, 7 females; median age at assessment of 23...
August 1, 2017: Journal of Children's Orthopaedics
https://www.readbyqxmd.com/read/28869812/the-effects-of-prosthetic-foot-stiffness-on-transtibial-amputee-walking-mechanics-and-balance-control-during-turning
#4
Courtney E Shell, Ava D Segal, Glenn K Klute, Richard R Neptune
BACKGROUND: Little evidence exists regarding how prosthesis design characteristics affect performance in tasks that challenge mediolateral balance such as turning. This study assesses the influence of prosthetic foot stiffness on amputee walking mechanics and balance control during a continuous turning task. METHODS: Three-dimensional kinematic and kinetic data were collected from eight unilateral transtibial amputees as they walked overground at self-selected speed clockwise and counterclockwise around a 1-meter circle and along a straight line...
August 15, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28866959/a-comparison-of-computerized-adaptive-testing-and-fixed-length-short-forms-for-the-prosthetic-limb-users-survey-of-mobility-plus-m-tm
#5
Dagmar Amtmann, Alyssa M Bamer, Jiseon Kim, Fraser Bocell, Hyewon Chung, Ryoungsun Park, Rana Salem, Brian J Hafner
BACKGROUND: New health status instruments can be administered by computerized adaptive test or short forms. The Prosthetic Limb Users Survey of Mobility (PLUS-M(TM)) is a self-report measure of mobility for prosthesis users with lower limb loss. This study used the PLUS-M to examine advantages and disadvantages of computerized adaptive test and short forms. OBJECTIVES: To compare scores obtained from computerized adaptive test to scores obtained from fixed-length short forms (7-item and 12-item) in order to provide guidance to researchers and clinicians on how to select the best form of administration for different uses...
September 1, 2017: Prosthetics and Orthotics International
https://www.readbyqxmd.com/read/28861592/increased-alertness-better-than-posture-prioritization-explains-dual-task-performance-in-prosthesis-users-and-controls-under-increasing-postural-and-cognitive-challenge
#6
Charla L Howard, Bonnie Perry, John W Chow, Chris Wallace, Dobrivoje S Stokic
Sensorimotor impairments after limb amputation impose a threat to stability. Commonly described strategies for maintaining stability are the posture first strategy (prioritization of balance) and posture second strategy (prioritization of concurrent tasks). The existence of these strategies was examined in 13 below-knee prosthesis users and 15 controls during dual-task standing under increasing postural and cognitive challenge by evaluating path length, 95% sway area, and anterior-posterior and medial-lateral amplitudes of the center of pressure...
August 31, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28861206/comparison-of-pasteurized-autograft-prosthesis-composite-reconstruction-and-resection-hip-arthroplasty-for-periacetabular-tumors
#7
Seung Yong Lee, Dae-Geun Jeon, Wan Hyeong Cho, Won Seok Song, Chang-Bae Kong
BACKGROUND: Because of the high complication rate of anatomical reconstruction after periacetabular resection, the strategy of resection alone has been revisited. However, in terms of complications and functional outcome, whether resection hip arthroplasty (RHA) shows a superior result to that of pelvic ring reconstruction remains controversial. METHODS: We compared 24 RHAs and 16 pasteurized autograft-prosthesis composite (PPC) reconstructions regarding the complication rates, operative time, blood loss, and functional outcome...
September 2017: Clinics in Orthopedic Surgery
https://www.readbyqxmd.com/read/28854938/the-assessment-of-femoral-shaft-morphology-in-the-sagittal-plane-in-chinese-patients-with-osteoarthritis-a-radiographic-analysis
#8
Zhengyuan Bao, Liang Qiao, Jianghui Qin, Jiacheng Xu, Sheng Zhou, Dongyang Chen, Dongquan Shi, Jin Dai, Yao Yao, Qing Jiang, Zhihong Xu
BACKGROUND: The purpose of this study was to analyze femoral shaft sagittal parameters in Chinese osteoarthritis (OA) patients undergoing total knee arthroplasty (TKA) and identify whether the parameters in the coronal plane could be predictors of those in the sagittal plane. METHODS: Standard long-standing anteroposterior and femoral lateral radiographs of 50 lower limbs in 50 Chinese OA patients were included. Sagittal femoral bowing angle (sFBA), angle between femoral distal anterior cortex axis and sagittal mechanical axis (DACSMA), angle between femoral distal anterior cortex axis and sagittal distal anatomic axis (DACSDAA), and angle between femoral sagittal mechanical axis and sagittal distal anatomic axis (SMADAA) were measured...
August 30, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/28844167/epidemiological-study-of-failures-of-the-jaipur-foot
#9
Ian Huber, Kristine M Fischenich, Jakob Wolynski, Brent Niese, Rachel Teater, Harlal Singh Mali, Anil Kumar Jain, Sheryl Sorby, Lisa Abrams, Tammy L Haut Donahue
OBJECTIVE: The purpose of this study was to examine effects of usage and demographics on damage to the Jaipur Foot prosthesis as well as the epidemiology and etiology of amputations performed at Santokba Durlabjhi Memorial Hospital (SDMH) in Jaipur, India. DESIGN: Total time spent standing, total time spent wearing and total distance walked were compared against severity and location of damage to the prosthesis. Time between initial fitting and follow-up visit for damaged prosthetic was also considered in this analysis...
August 26, 2017: Disability and Rehabilitation. Assistive Technology
https://www.readbyqxmd.com/read/28842793/knee-function-after-limb-salvage-surgery-for-malignant-bone-tumor-comparison-of-megaprosthesis-and-distal-femur-allograft-with-epiphysis-sparing
#10
Sébastien Pesenti, Emilie Peltier, Vincent Pomero, Guillaume Authier, Lionel Roscigni, Elke Viehweger, Jean-Luc Jouve
PURPOSE: Limb salvage surgery is increasingly used for the treatment of distal femur bone sarcomas. Total knee replacement using megaprosthesis and epiphysis-sparing biologic reconstruction using an allograft are widely used in order to preserve joint motion. We aimed to compare the results of these procedures using gait analysis in patients undergoing limb salvage surgery. METHODS: Fifteen patients were included, nine undergoing allograft with epiphysis sparing (Allograft group) and six undergoing megaprosthesis (Megaprosthesis group)...
August 26, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28842073/disarticulation-of-the-knee-analysis-of-an-extended-database-on-survival-wound-healing-and-ambulation
#11
Rachelle Nijmeijer, Henricus G J M Voesten, Joannes H B Geertzen, Pieter U Dijkstra
OBJECTIVE: This study analyzed survival of the amputee patients, wound healing, and ambulation after knee disarticulation (KD). METHODS: Between July 1989 and October 2015, 153 KDs in 138 patients were performed at Nij Smellinghe Hospital, Drachten. Data were retrieved from hospital medical records. Wound healing was analyzed using nonparametric tests. Ambulation was recorded according to the Special Interest Group Amputation Medicine Workgroup Amputation and Prosthetics mobility scale...
September 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28832013/model-and-experiments-to-optimize-co-adaptation-in-a-simplified-myoelectric-control-system
#12
Mathilde Couraud, Daniel Cattaert, Florent Paclet, Pierre-Yves Oudeyer, Aymar de Rugy
OBJECTIVE: To compensate for a limb lost in an amputation, myoelectric prostheses use surface electromyography (EMG) from the remaining muscles to control the prosthesis. Despite considerable progress, myoelectric controls remain markedly different from the way we normally control movements, and require intense user adaptation. To overcome this, our goal is to explore concurrent machine co-adaptation techniques that are developed in the field of brain-machine interface, and that are beginning to be used in myoelectric controls...
August 23, 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/28831329/targeted-muscle-reinnervation-to-improve-pain-prosthetic-tolerance-and-bioprosthetic-outcomes-in-the-amputee
#13
REVIEW
J Byers Bowen, Corinne E Wee, Jaclyn Kalik, Ian L Valerio
Scope and Significance: There are ∼185,000 amputations each year and nearly 2 million amputees currently living in the United States. Approximately 25% of these amputees will experience chronic pain issues secondary to localized neuroma pain and/or phantom limb pain. Problem: The significant discomfort caused by neuroma and phantom limb pain interferes with prosthesis wear, subjecting amputees to the additional physical and psychological morbidity associated with chronic immobility. Although numerous neuroma treatments are described, none of these methods are consistently effective in eliminating symptoms...
August 1, 2017: Advances in Wound Care
https://www.readbyqxmd.com/read/28826272/iodine-starch-test-for-assessment-of-hyperhidrosis-in-amputees-evaluation-of-different-methods-of-application
#14
Colby Hansen, Ben Wayment, Stephanie Klein, Bradeigh Godfrey
PURPOSE: Hyperhidrosis is a common problem for amputees. The iodine-starch test is frequently used to assess hyperhidrosis, but a method for its application has not been described for amputees. METHODS: We performed an unblinded comparison of the iodine-starch test using various methods to protect the prosthesis in 10 prosthetic limb users with hyperhidrosis. RESULTS: Plastic wrap produced a diffuse pattern of sweating in 70% of subjects. Forty percent had complaints about this method, and 50% experienced leakage of iodine stain onto prosthetic liners...
August 21, 2017: Disability and Rehabilitation
https://www.readbyqxmd.com/read/28814045/across-user-adaptation-for-a-powered-lower-limb-prosthesis
#15
John A Spanias, Ann M Simon, Levi J Hargrove
Pattern recognition algorithms have been used to control powered lower limb prostheses because they are capable of identifying the intent of the amputee user and therefore can provide a method for seamlessly transitioning between the different locomotion modes of the prosthesis. However, one major limitation of current algorithms is that they require subject-specific data from the individual user. These data are difficult and time-consuming to collect and consequently these algorithms do not generalize well across users...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28814025/learning-from-demonstration-teaching-a-myoelectric-prosthesis-with-an-intact-limb-via-reinforcement-learning
#16
Gautham Vasan, Patrick M Pilarski
Prosthetic arms should restore and extend the capabilities of someone with an amputation. They should move naturally and be able to perform elegant, coordinated movements that approximate those of a biological arm. Despite these objectives, the control of modern-day prostheses is often nonintuitive and taxing. Existing devices and control approaches do not yet give users the ability to effect highly synergistic movements during their daily-life control of a prosthetic device. As a step towards improving the control of prosthetic arms and hands, we introduce an intuitive approach to training a prosthetic control system that helps a user achieve hard-to-engineer control behaviours...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28814023/representing-high-dimensional-data-to-intelligent-prostheses-and-other-wearable-assistive-robots-a-first-comparison-of-tile-coding-and-selective-kanerva-coding
#17
Jaden B Travnik, Patrick M Pilarski
Prosthetic devices have advanced in their capabilities and in the number and type of sensors included in their design. As the space of sensorimotor data available to a conventional or machine learning prosthetic control system increases in dimensionality and complexity, it becomes increasingly important that this data be represented in a useful and computationally efficient way. Well structured sensory data allows prosthetic control systems to make informed, appropriate control decisions. In this study, we explore the impact that increased sensorimotor information has on current machine learning prosthetic control approaches...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28814013/a-third-arm-design-of-a-bypass-prosthesis-enabling-incorporation
#18
Adam W Wilson, Daniel H Blustein, Jon W Sensinger
A variety of factors affect the performance of a person using a myoelectric prosthesis, including increased control noise, reduced sensory feedback, and muscle fatigue. Many studies use able-bodied subjects to control a myoelectric prosthesis using a bypass socket in order to make comparisons to movements made with intact limbs. Depending on the goals of the study, this approach can also allow for greater subject numbers and more statistical power in the analysis of the results. As we develop assessment tools and techniques to evaluate how peripheral nerve interfaces impact prosthesis incorporation, involving normally limbed subjects in the studies becomes challenging...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28814002/joint-based-velocity-feedback-to-virtual-limb-dynamic-perturbations
#19
Eric J Earley, Kyle J Kaveny, Reva E Johnson, Levi J Hargrove, Jon W Sensinger
Despite significant research developing myoelectric prosthesis controllers, many amputees have difficulty controlling their devices due in part to reduced sensory feedback. Many attempts at providing supplemental sensory feedback have not significantly aided control. We hypothesize this is because the feedback provided contains redundant information already provided by vision. However, whereas vision provides egocentric, position-based feedback, sensory feedback tied to joint coordinates may provide information complementary to vision...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28814001/design-of-an-energy-efficient-transfemoral-prosthesis-using-lockable-parallel-springs-and-electrical-energy-transfer
#20
Francois Heremans, Renaud Ronsse
Over the last decade, active lower-limb prostheses demonstrated their ability to restore a normal gait for transfemoral amputees by supplying the required positive energy balance [1]. However, the added-value of such devices is significantly impacted by their limited energetic autonomy preventing their full appropriation by the patients. There is thus a strong incentive to reduce the overall power consumption of active prostheses. Addressing this need requires to revisit the electromechanical design. For both the ankle and the knee, the present paper demonstrates that both the use of a lockable parallel spring and the transfer of electrical energy between joints can significantly improve the energetic performance for overground walking...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
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