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Limb prosthesis

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https://www.readbyqxmd.com/read/28525482/artificial-cervical-disk-replacement-for-the-treatment-of-adjacent-segment-disease-after-anterior-cervical-decompression-and-fusion
#1
Sheng Bin, Huang Xiangwang, Xiao Sheng, Xiang Tiecheng, Liu Xiangyang, Zhang Yi, Liu Bin
STUDY DESIGN: Retrospective study. OBJECTIVE: To evaluate the outcome of artificial cervical disk replacement (ACDR) for the treatment of adjacent segment disease (ASD) after anterior cervical decompression and fusion (ACDF). SUMMARY OF BACKGROUND DATA: ACDF is the useful procedure for degenerative cervical diseases. However, studies have reported accelerated degeneration of functional spinal units adjacent to the fusion site after ACDF. MATERIALS AND METHODS: Between January 2004 and January 2011, 32 inpatients (18 male, 14 female; age, 38-61 y; mean, 48 y) underwent ACDR for the treatment of ASD after previous ACDF (single-level: n=12; 2-level: n=15; 3-level: n=5)...
June 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28523276/improving-the-robustness-of-real-time-myoelectric-pattern-recognition-against-arm-position-changes-in-transradial-amputees
#2
Yanjuan Geng, Oluwarotimi Williams Samuel, Yue Wei, Guanglin Li
Previous studies have showed that arm position variations would significantly degrade the classification performance of myoelectric pattern-recognition-based prosthetic control, and the cascade classifier (CC) and multiposition classifier (MPC) have been proposed to minimize such degradation in offline scenarios. However, it remains unknown whether these proposed approaches could also perform well in the clinical use of a multifunctional prosthesis control. In this study, the online effect of arm position variation on motion identification was evaluated by using a motion-test environment (MTE) developed to mimic the real-time control of myoelectric prostheses...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28521576/rethinking-the-foam-cosmesis-for-people-with-lower-limb-absence
#3
Nicola Cairns, Jonathan Corney, Kevin Murray, Karena Moore-Millar, Gillian D Hatcher, Saeed Zahedi, Richard Bradbury, Joe McCarthy
BACKGROUND AND AIM: A recent survey of people with lower limb absence revealed that patients' satisfaction with their foam cosmesis is lower than desired. The aim of this project was to improve the lifelike appearance, functionality and durability of the cosmesis through a user-centred design methodology. TECHNIQUE: Concept development and prototyping led to a new cosmesis design which features a cut-out located at the knee, inserted with an artificial patella made of a more rigid foam...
May 1, 2017: Prosthetics and Orthotics International
https://www.readbyqxmd.com/read/28508765/a-comparison-of-outcomes-of-treatment-with-resection-prosthesis-of-the-hip-in-revision-and-oncological-surgery
#4
Paweł Kamiński, Jakub Szmyd, Jarosław Ambroży, Jerzy Mirosław Jaworski, Bogusław Frańczuk
INTRODUCTION: The introduction of resection prostheses paved the way for the development of limb-sparing surgery in patients with primary or metastatic bone tumours. After some time, the developing possibilities of treatment of extensive bone defects allowed for the use of resection prostheses as an emergency procedure in patients undergoing revision surgery due to hip implant loosening. The aim of this paper is to compare treatment outcomes in patients receiving the Modular Universal Tumour and Revision System (MUTARS) resection prosthesis during arthroplasty performed for different indications: treatment of a tumour metastasis and revision surgery in cases of implant loosening...
April 12, 2017: Ortopedia, Traumatologia, Rehabilitacja
https://www.readbyqxmd.com/read/28507643/imaging-of-complications-after-limb-prostheses-implantation-in-children-with-bone-tumors
#5
Beata Iwanowska, Hanna Brągoszewska, Jarosław Mądzik, Sylwia Szkudlińska-Pawlak, Izabela Kopyś-Wiszniewska, Małgorzata Jastrzębska, Barbara Kowalska, Maria Uliasz, Monika Bekiesińska-Figatowska
BACKGROUND: Tumors of the developmental age are an important problem in clinical practice. Primary bone tumors constitute 1-1.5% of all tumors, and 7% of all tumors diagnosed in the developmental age. The aim of the study was to assess the capabilities of imaging methods in diagnosing complications of limb endoprostheses in children with osteoarticular tumors. MATERIAL/METHODS: We included 155 patients with limb endoprostheses, aged 7-26 years. There were 113 patients with knee prostheses, 1 patient with bilateral knee prostheses, 16 patients with shoulder prostheses, 14 patients with hip prostheses, 11 patients with hip and knee prostheses, and 1 patient with a femoral prosthesis...
2017: Polish Journal of Radiology
https://www.readbyqxmd.com/read/28505545/leg-stiffness-during-sprinting-in-transfemoral-amputees-with-running-specific-prosthesis
#6
Yoko Sano, Atsushi Makimoto, Satoru Hashizume, Akihiko Murai, Yoshiyuki Kobayashi, Hiroshi Takemura, Hiroaki Hobara
Carbon fiber running-specific prostheses are designed to reproduce the spring-like stepping behavior of individuals similar to springs loaded by the entire body mass (i.e. spring-mass model). The aim of this study was to test whether leg stiffness would be modulated differently between intact and prosthetic legs in transfemoral amputees wearing RSP during sprinting. Eight unilateral transfemoral amputees performed maximum sprinting along an indoor overground runway. Leg stiffness was calculated from kinetic and kinematic data in intact and prosthetic legs...
May 4, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28496017/comparison-of-the-incidence-of-complications-and-secondary-surgical-interventions-necessary-in-patients-with-chronic-lower-limb-ischemia-treated-by-both-open-and-endovascular-surgeries
#7
Dariusz Janczak, Maciej Malinowski, Wojciech Bąkowski, Katarzyna Krakowska, Karol Marschollek, Paweł Marschollek, Mariusz Chabowski
BACKGROUND: Peripheral arterial disease (PAD) affects 3%-10% of the population before the age of 70 years and 15%-20% after that age.The aim of the study was to compare the incidence of complications and secondary interventions in patients who underwent each type of treatment. METHODS: We analyzed 734 medical records of the Department of Surgery at the 4th Military Teaching Hospital in Wroclaw, In total, 394 were operated on with open surgery; an endarterectomy (59...
May 11, 2017: Annals of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28494322/constituent-lower-extremity-work-clew-approach-a-novel-tool-to-visualize-joint-and-segment-work
#8
Anahid Ebrahimi, Saryn R Goldberg, Jason M Wilken, Steven J Stanhope
Work can reveal the mechanism by which movements occur. However, work is less physically intuitive than more common clinical variables such as joint angles, and are scalar quantities which do not have a direction. Therefore, there is a need for a clearly reported and comprehensively calculated approach to easily visualize and facilitate the interpretation of work variables in a clinical setting. We propose the Constituent Lower Extremity Work (CLEW) approach, a general methodology to visualize and interpret cyclic tasks performed by the lower limbs...
April 24, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28489541/the-effect-of-prosthesis-use-on-hand-mental-rotation-after-unilateral-upper-limb-amputation
#9
Xiaoli Guo, Zixuan Lin, Yuanyuan Lyu, Robin Bekrater-Bodmann, Herta Flor, Shanbao Tong
Amputation of a limb induces changes in the so-called body schema, which might be influenced by the use of prosthetic devices. Changes in the body representation associated with prosthesis use could be investigated using a hand mental rotation task. However, direct neurophysiologic evidence for the effect of prosthesis use on hand mental rotation is still lacking. In this study, we recruited two groups of unilateral upper-limb amputees, i.e., amputees using a prosthesis or with a history of prosthesis use (Pro group) and amputees without a prosthesis (non-Pro group), as well as a sample of matched healthy controls...
May 8, 2017: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/28487630/analysis-of-interrelationships-among-voluntary-and-prosthetic-leg-joint-parameters-using-cyclograms
#10
Farahiyah Jasni, Nur Azah Hamzaid, Nor Elleeiana Mohd Syah, Tze Y Chung, Noor Azuan Abu Osman
The walking mechanism of a prosthetic leg user is a tightly coordinated movement of several joints and limb segments. The interaction among the voluntary and mechanical joints and segments requires particular biomechanical insight. This study aims to analyze the inter-relationship between amputees' voluntary and mechanical coupled leg joints variables using cyclograms. From this analysis, the critical gait parameters in each gait phase were determined and analyzed if they contribute to a better powered prosthetic knee control design...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28487130/timed-activity-performance-in-persons-with-upper-limb-amputation-a-preliminary-study
#11
Linda Resnik, Mathew Borgia, Frantzy Acluche
STUDY DESIGN: 55 subjects with upper limb amputation were administered the T-MAP twice within one week. PURPOSE: To develop a timed measure of activity performance for persons with upper limb amputation (T-MAP); examine the measure's internal consistency, test-retest reliability and validity; and compare scores by prosthesis use. INTRODUCTION: Measures of activity performance for persons with upper limb amputation are needed The time required to perform daily activities is a meaningful metric that implication for participation in life roles...
May 6, 2017: Journal of Hand Therapy: Official Journal of the American Society of Hand Therapists
https://www.readbyqxmd.com/read/28470463/-the-endo-exo-prosthesis-treatment-concept-improvement-in-quality-of-life-after-limb-amputation
#12
T Hoffmeister, F Schwarze, H H Aschoff
Osseointegrated, percutaneous implants as the force bearer for exoprosthetics after limb amputation have been used in individual cases for clinical rehabilitation of amputees during the past years. Most experience in this field in Germany has been accumulated at the Sana Klinik in Lübeck with the so-called endo-exo prosthesis (EEP) system. The two-step implantation procedure can now be considered as reliable. Following a well-documented learning curve initial soft tissue problems concerning the cutaneous stoma can now be regarded as exceptions...
May 2017: Der Unfallchirurg
https://www.readbyqxmd.com/read/28470462/-connecting-adapter-for-coupling-exoprostheses-to-endoshafts-demands-on-orthopedic-technicians-with-respect-to-planning-and-application
#13
H Grundei, A Timmermann
INTRODUCTION: Transcutaneous, bone anchored prostheses have proved to be an alternative for amputees. In addition to the safe osseointegration of the implant, the correct prosthetic alignment is also important. Therefore, the interaction between prosthesis components and the prosthesis wearer is significant and the role of the certified prosthetist should not be underestimated. AIM: The aim of treatment is the best possible compensation of disability after limb loss with increase of physical abilities and comfort of the prosthesis wearer by means of bone anchored prosthesis...
May 2017: Der Unfallchirurg
https://www.readbyqxmd.com/read/28468600/sensory-feedback-add-on-for-upper-limb-prostheses
#14
Nader Fallahian, Hassan Saeedi, Hamidreza Mokhtarinia, Farhad Tabatabai Ghomshe
BACKGROUND AND AIM: Sensory feedback systems have been of great interest in upper-limb prosthetics. Despite tremendous research, there are no commercial modality-matched feedback systems. This article aims to introduce the first detachable and feedback add-on option that can be attached to in-use prostheses. TECHNIQUE: A sensory feedback system was tested on a below-elbow myoelectric prosthesis. The aim was to have the amputee grasp fragile objects without crushing while other accidental feedback sources were blocked...
June 2017: Prosthetics and Orthotics International
https://www.readbyqxmd.com/read/28467317/deep-learning-based-artificial-vision-for-grasp-classification-in-myoelectric-hands
#15
Ghazal Ghazaei, Ali Alameer, Patrick Degenaar, Graham Morgan, Kianoush Nazarpour
OBJECTIVE: Computer vision-based assistive technology solutions can revolutionise the quality of care for people with sensorimotor disorders. The goal of this work was to enable trans-radial amputees to use a simple, yet efficient, computer vision system to grasp and move common household objects with a two-channel myoelectric prosthetic hand. APPROACH: We developed a deep learning-based artificial vision system to augment the grasp functionality of a commercial prosthesis...
May 3, 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/28464752/the-accuracy-and-precision-of-radiostereometric-analysis-in-upper-limb-arthroplasty
#16
Bart Ten Brinke, Annechien Beumer, Koen L M Koenraadt, Denise Eygendaal, Gerald A Kraan, Nina M C Mathijssen
Background and purpose - Radiostereometric analysis (RSA) is an accurate method for measurement of early migration of implants. Since a relation has been shown between early migration and future loosening of total knee and hip prostheses, RSA plays an important role in the development and evaluation of prostheses. However, there have been few RSA studies of the upper limb, and the value of RSA of the upper limb is not yet clear. We therefore performed a systematic review to investigate the accuracy and precision of RSA of the upper limb...
June 2017: Acta Orthopaedica
https://www.readbyqxmd.com/read/28458962/team-approach-helps-patient-survive-high-voltage-electric-burn
#17
Noha Saied, Ahmed Harfoush, Tamer Ayed, Alaa Moustafa, Rania Hassan, Ezz Eldolify, Hany Abdelaziz
A 20-year-old man was subjected to high-voltage electric burn, which was occupational. The patient was admitted to AlGalaa Military Medical Complex almost 2 weeks after the accident had happened. According to Lund and Browder's chart, the patient had a 40% total body surface area burn involving the upper limbs, anterior and posterior trunks, and the left thigh (third- and fourth-degree burns). The aim of this study was to stabilize the patient by conducting lifesaving operations in multiple scheduled sessions, bilateral below-elbow amputations, escharotomies, and excision of affected ribs and cartilages...
March 2017: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/28438166/adjacent-regenerative-peripheral-nerve-interfaces-produce-phase-antagonist-signals-during-voluntary-walking-in-rats
#18
Daniel Ursu, Andrej Nedic, Melanie Urbanchek, Paul Cederna, R Brent Gillespie
BACKGROUND: Regenerative Peripheral Nerve Interfaces (RPNIs) are neurotized muscle grafts intended to produce electromyographic signals suitable for motorized prosthesis control. Two RPNIs producing independent agonist/antagonist signals are required for each control axis; however, it is unknown whether signals from adjacent RPNIs are independent. The purpose of this work was to determine signaling characteristics from two adjacent RPNIs, the first neurotized by a foot dorsi-flexor nerve and the second neurotized by a foot plantar-flexor nerve in a rodent model...
April 24, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/28436378/outcomes-of-corpectomy-in-patients-with-metastatic-cancer
#19
Grzegorz Guzik
BACKGROUND: The objective of surgical management of spinal metastases is to reduce pain and improve the patient's quality of life. The operation should restore spinal stability and decompress neural structures. One surgical technique is corpectomy followed by vertebral body reconstruction and stabilisation of the spine. The procedure may be performed in patients in overall good health and a good survival prognosis. The aim of this paper is to present the outcomes of surgical management of spinal metastases in patients who underwent corpectomy followed by vertebral body reconstruction and stabilisation of the spine...
January 26, 2017: Ortopedia, Traumatologia, Rehabilitacja
https://www.readbyqxmd.com/read/28434280/use-of-a-custom-made-limb-press-model-to-assess-intra-and-extracapsular-techniques-for-treating-cranial-cruciate-ligament-rupture-in-cats
#20
Wolfgang Kneifel, Danilo Borak, Barbara Bockstahler, Eva Schnabl-Feichter
Objectives This study aimed to compare the under-and-over technique, a type of intracapsular treatment, and the standard fabella-tibial suture, a method for extracapsular treatment, in achieving immediate, postoperative stifle stability after cranial cruciate ligament (CrCL) rupture by using a feline, custom-made limb-press model. Methods Cadaveric feline hindlimb specimens (n = 14) were positioned in the limb press at predefined joint angles (stifle joint: 120°; hock joint: 120°), and vertical loads of 5%, 10%, 20% and 30% body weight were applied statically...
April 1, 2017: Journal of Feline Medicine and Surgery
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