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Prosthetic joint

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https://www.readbyqxmd.com/read/28526923/focal-articular-prosthetic-resurfacing-for-the-treatment-of-full-thickness-articular-cartilage-defects-in-the-knee-12-year-follow-up-of-two-cases-and-review-of-the-literature
#1
C Becher, E B Cantiller
INTRODUCTION: The rationale of focal articular prosthetic resurfacing used as a primary arthroplasty procedure in the treatment of articular cartilage defects is still under debate. Conflicting reports raise concern about high rates of re-operations and continued development of osteoarthritis, while others have reported good outcomes. The goal of this paper is to present the long-term results of two patients with a 12-year follow-up and to report the results of a literature review. MATERIALS AND METHODS: Two patients (male, 70 years; female 63 years) with a follow-up of 12 years were reviewed...
May 19, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28526565/efficacy-of-indefinite-chronic-oral-antimicrobial-suppression-for-prosthetic-joint-infection-in-the-elderly-a-comparative-study
#2
V Prendki, P Sergent, A Barrelet, E Oziol, E Beretti, M Berlioz-Thibal, F Bouchand, F Dauchy, E Forestier, G Gavazzi, C Ronde-Oustau, J Stirnemann, A Dinh
OBJECTIVES: During prosthetic joint infection (PJI), surgical management is sometimes impossible, indefinite chronic oral antimicrobial suppression (ICOAS) may sometimes be the only option. We evaluated the outcome of elderly patients who benefited from ICOAS for a strictly palliative goal METHODS: We performed a national retrospective cohort study in France of patients aged >75years old with PJI, and managed with ICOAS planned for life long from 2009 to 2014, and compared the population with an event versus the population free of event...
May 16, 2017: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/28522245/pin-site-complications-associated-with-computer-assisted-navigation-in-hip-and-knee-arthroplasty
#3
Eli Kamara, Zachary P Berliner, Matthew S Hepinstall, H John Cooper
BACKGROUND: There has been a great increase in the use of navigation technology in joint arthroplasty. In most types of navigation-assisted surgery, several temporary navigation pins are placed in the patient. Goals of this study are (1) to identify complications and (2) risk factors associated with placement of these pins. METHODS: This is a retrospective cohort study of all navigation-assisted hip and knee arthroplasty performed a single institution over a 3-year period...
April 20, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28522189/preoperative-joint-aspiration-in-the-diagnosis-of-non-acute-hip-and-knee-prosthetic-joint-infections
#4
A Bicart-See, J Lourtet, C Delpierre, C Livideanu, T Pollon, J Remi, M P Felice, G Giordano, E Bonnet
No abstract text is available yet for this article.
May 15, 2017: Médecine et Maladies Infectieuses
https://www.readbyqxmd.com/read/28501110/arachidonic-acid-causes-hidden-blood-loss-like-red-blood-cell-damage-through-oxidative-stress-reactions
#5
Tao Yuan, Yu Cong, Jia Meng, Hong Qian, Wei Ye, Wen-Shuang Sun, Jian-Ning Zhao, Ni-Rong Bao
BACKGROUND: Hidden blood loss (HBL) often occurs in the prosthetic replacement for joint, but the mechanism is still not clear. MATERIALS AND METHODS: This study tried to establish an animal model of HBL by injecting arachidonic acid (AA) into the Sprague-Dawley rats. Different concentrations of AA were injected into the tail veins of the rats, and blood samples were collected before and after administration at 24, 48, and 72 h. A complete blood count was obtained by to find the hemoglobin (Hb) and red blood cell (RBC) count changes...
May 1, 2017: Journal of Surgical Research
https://www.readbyqxmd.com/read/28500999/effects-of-working-gas-pressure-on-zirconium-dioxide-thin-film-prepared-by-pulsed-plasma-deposition-roughness-wettability-friction-and-wear-characteristics
#6
M Berni, G Marchiori, A Gambardella, M Boi, M Bianchi, A Russo, A Visani, M Marcacci, P G Pavan, N F Lopomo
In joint arthroplasty one of the main issues related to the failure of prosthetic implants is due to the wear of the ultra-high molecular weight polyethylene (UHMWPE) component. Surface treatments and coatings have been recognized as enhancing methods, able to improve the tribological properties of the implants. Therefore, the main objective of this work was to investigate the possibility to fabricate yttria-stabilized zirconia (YSZ) coatings on a metal (AISI 316-L) substrate by means of Pulsed Electron Deposition, in order to improve the tribological behavior of the polymer-metal coupling, by reducing the initial wear of the UHMWPE component...
May 4, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28499159/sensitivity-of-biomechanical-outcomes-to-independent-variations-of-hindfoot-and-forefoot-stiffness-in-foot-prostheses
#7
Peter Gabriel Adamczyk, Michelle Roland, Michael E Hahn
Many studies have reported the effects of different foot prostheses on gait, but most results cannot be generalized because the prostheses' properties are seldom reported. We varied hindfoot and forefoot stiffness in an experimental foot prosthesis, in increments of 15N/mm, and tested the parametric effects of these variations on treadmill walking in unilateral transtibial amputees, at speeds from 0.7 to 1.5m/s. We computed outcomes such as prosthesis energy return, center of mass (COM) mechanics, ground reaction forces, and joint mechanics, and computed their sensitivity to component stiffness...
May 9, 2017: Human Movement Science
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/28490492/molecular-diagnosis-of-orthopaedic-device-infection-direct-from-sonication-fluid-by-metagenomic-sequencing
#9
Teresa L Street, Nicholas D Sanderson, Bridget L Atkins, Andrew J Brent, Kevin Cole, Dona Foster, Martin A McNally, Sarah Oakley, Leon Peto, Adrian Taylor, Tim E A Peto, Derrick W Crook, David W Eyre
Culture of multiple periprosthetic tissue samples is the current gold-standard for microbiological diagnosis of prosthetic joint infections (PJI). Additional diagnostic information may be obtained through sonication fluid culture of explants. However, current techniques can have relatively low sensitivity, with prior antimicrobial therapy and infection by fastidious organisms influencing results. We assessed if metagenomic sequencing of total DNA extracts obtained direct from sonication fluid can provide an alternative rapid and sensitive tool for diagnosis of PJI...
May 10, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28488017/c-reactive-protein-course-during-the-first-5-days-after-total-knee-arthroplasty-cannot-predict-early-prosthetic-joint-infection
#10
Christoph Windisch, Steffen Brodt, Eric Roehner, Georg Matziolis
INTRODUCTION: Periprosthetic joint infection (PJI) is one of the most devastating major complications after total knee arthroplasty (TKA). The laboratory value C-reactive protein (CRP) is the inflammatory biomarker most suitable for detecting a potential postoperative (p.o.) early infection in orthopaedic surgery. However, on the basis of multiple receiver operating characteristic (ROC) analyses, CRP only has limited sensitivity and specificity. The objective of the present study was to test the hypothesis that, besides the absolute preoperative CRP value, also the absolute postoperative CRP value and its course over the first 5 days after TKA are valid indicators of periprosthetic early infection...
May 9, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28487630/analysis-of-interrelationships-among-voluntary-and-prosthetic-leg-joint-parameters-using-cyclograms
#11
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/28483043/diagnosis-of-prosthetic-joint-infection-cultures-biomarker-and-criteria
#12
REVIEW
Eric O Gomez-Urena, Aaron J Tande, Douglas R Osmon, Elie F Berbari
Prosthetic joint infections (PJIs) are devastating complications after joint arthroplasty that continue to pose a diagnostic challenge. Currently, a single, stand-alone test with the adequate accuracy and reliability for diagnosis of PJI is not available; therefore, physicians who care for patients with PJI must rely on a combination of diagnostic tests for the diagnosis of PJI. This article reviews conventional laboratory test modalities, diagnostic accuracy and limitations of current tests, and novel emerging tests for the diagnosis of PJI...
June 2017: Infectious Disease Clinics of North America
https://www.readbyqxmd.com/read/28482618/effects-of-carbon-addition-on-wear-mechanisms-of-cocrmo-metal-on-metal-hip-joint-bearings
#13
Yan Chen, Yunping Li, Yuichiro Koizumi, Hani Haider, Akihiko Chiba
The wear behaviors of biomedical CoCrMo prosthetic alloys containing various amounts of carbon were investigated using a standard hip joint simulator in a simulated body fluid. A few chunks and punctate σ-phase precipitates were observed in the low-carbon (LC) alloy; these were responsible for the abrasion and run-in wear. Increasing the carbon content led to greater precipitation of globular M23C6-type carbides. As a result, lower wear loss was observed in the high-carbon (HC) alloy. However, the Student's t-test analysis on wear loss indicated that there was no significant difference in wear loss between the LC-LC and HC-HC combinations...
July 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28480283/using-nuclear-medicine-imaging-wisely-in-diagnosing-infectious-diseases
#14
REVIEW
Andrea Censullo, Tara Vijayan
In recent years, there has been an increasing emphasis on efficient and accurate diagnostic testing, exemplified by the American Board of Internal Medicine's "Choosing Wisely" campaign. Nuclear imaging studies can provide early and accurate diagnoses of many infectious disease syndromes, particularly in complex cases where the differential remains broad. This review paper offers clinicians a rational, evidence-based guide to approaching nuclear medicine tests, using an example case of methicillin-sensitive Staphylococcus aureus (MSSA) bacteremia in a patient with multiple potential sources...
2017: Open Forum Infectious Diseases
https://www.readbyqxmd.com/read/28479058/how-many-cultures-are-necessary-to-identify-pathogens-in-the-management-of-total-hip-and-knee-arthroplasty-infections
#15
Rikesh Gandhi, Edward Silverman, Paul M Courtney, Gwo-Chin Lee
BACKGROUND: Identification of the infecting organism is critical to the successful management of deep prosthetic joint infections about the hip and the knee. However, the number of culture specimens and which culture specimens are best to identify these organisms is unknown. METHODS: We evaluated 113 consecutive patients with infected total hip and total knee arthroplasties and correlated the type of culture specimen and number of specimens taken during surgery to the likelihood of a positive culture result...
April 14, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28473693/serum-and-synovial-fluid-interleukin-6-for-the-diagnosis-of-periprosthetic-joint-infection
#16
Kai Xie, Kerong Dai, Xinhua Qu, Mengning Yan
A gold standard for diagnosis of periprosthetic joint infection (PJI) has not yet been established. The objective of this study was to evaluate the diagnostic value of serum and synovial fluid interleukin (IL)-6 levels for PJI. The MEDLINE and EMBASE databases were searched for studies describing PJI diagnosis using serum and synovial fluid IL-6 and published between January 1990 and October 2016. Seventeen studies were included in the analysis. The pooled sensitivities of serum and synovial fluid IL-6 were 0...
May 4, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28470462/-connecting-adapter-for-coupling-exoprostheses-to-endoshafts-demands-on-orthopedic-technicians-with-respect-to-planning-and-application
#17
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/28463204/design-and-characterization-of-a-quasi-passive-pneumatic-foot-ankle-prosthesis
#18
Jeffrey Lee, Luke Mooney, Elliott Rouse
The majority of commercially available passive prosthetic feet are not capable of providing joint mechanics that match that of the intact human ankle. Due to their cantilever design, their stiffness characteristics contrast with what has been observed in the biological ankle; namely, an increase in stiffness during the stance phase of walking. In this study, we introduce the design and control of a pneumatic foot-ankle prosthesis that attempts to provide biomimetic mechanics. The prosthesis is comprised of a pneumatic cylinder in series with a fiberglass leaf spring, and a solenoid valve to control the flow of air between the two sides of the cylinder...
April 28, 2017: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/28461965/total-knee-arthroplasty-and-infection-how-surgeons-can-reduce-the-risks
#19
REVIEW
Nicola Ratto, Chiara Arrigoni, Federica Rosso, Matteo Bruzzone, Federico Dettoni, Davide Edoardo Bonasia, Roberto Rossi
Total joint arthroplasty (TJA) is one of the most common orthopaedic procedures. Nevertheless, several complications can lead to implant failure.Peri-prosthetic joint infections (PJI) certainly represent a significant challenge in TJA, constituting a major cause of prosthetic revision. The surgeon may have an important role in reducing the PJI rate by limiting the impact of significant risk factors associated to either the patient, the operative environment or the post-operative care.In the pre-operative period, several preventive measures may be adopted to manage reversible medical comorbidities...
September 2016: EFORT Open Rev
https://www.readbyqxmd.com/read/28458734/designing-a-new-molecular-probe-the-potential-role-for-tilmanocept-lymphoseek-%C3%A2-in-the-assessment-of-patients-with-painful-hip-and-knee-joint-prostheses
#20
O O Adesanya, C E Hutchinson
BACKGROUND: There is a long history of nuclear medicine developments in orthopaedics beginning in the early 20(th) century. Technetium-99m ((99m)Tc) has a short half-life of six hours, emits 140 keV gamma rays and is the most widely used isotope, imaged with the Anger (gamma) camera. Gamma image quality and test sensitivity in painful prosthetic joints can be improved with single photon emission computed tomography (SPECT) and SPECT/CT. Positron Emission Tomography-Computed Tomography (PET-CT) with Sodium Fluoride ((18)F-NaF) and (18)Fluorine-fluorodeoxyglucose ((18)F-FDG) PET have promising and limited roles respectively in the investigation of painful prosthetic joints...
2017: Open Orthopaedics Journal
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