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https://www.readbyqxmd.com/read/28541797/the-effect-of-intraoperative-graft-coverage-with-preserved-remnant-tissue-on-the-results-of-the-pivot-shift-test-after-anatomic-double-bundle-anterior-cruciate-ligament-reconstruction-quantitative-evaluations-with-an-electromagnetic-sensor-system
#1
Nobuto Kitamura, Kazunori Yasuda, Masashi Yokota, Keiko Goto, Susumu Wada, Jun Onodera, Eiji Kondo
BACKGROUND: Remnant tissue preservation may be important in improving graft healing after anterior cruciate ligament (ACL) reconstruction, but it has yet to be established whether remnant tissue preservation improves the control of pivot-shift laxity. HYPOTHESIS: The amount of ACL graft coverage with preserved remnant tissue improves the control of pivot-shift laxity, as qualitatively determined with an electromagnetic device. STUDY DESIGN: Cohort study; Level of evidence, 3...
May 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28541177/when-teachable-moments-become-ethically-problematic
#2
Elizabeth Dzeng
There is frequently tension in medical education between teaching moments that provide skills and knowledge for medical trainees, and instrumentalizing patients for the purpose of teaching. In this commentary, I question the ethical acceptability of the practice of providing cardiopulmonary resuscitation (CPR) and advanced cardiac life support (ACLS) to dying patients who would be unlikely to survive resuscitation, as a teaching opportunity for medical trainees. This practice violates the principle of informed consent, as the patient agreed to resuscitation for the purpose of potentially prolonging life rather than to futile resuscitation as a teaching opportunity...
July 2017: Cambridge Quarterly of Healthcare Ethics: CQ: the International Journal of Healthcare Ethics Committees
https://www.readbyqxmd.com/read/28540619/medial-collateral-ligament-reconstruction-is-necessary-to-restore-anterior-stability-with-anterior-cruciate-and-medial-collateral-ligament-injury
#3
Junjun Zhu, Jiangtao Dong, Brandon Marshall, Monica A Linde, Patrick Smolinski, Freddie H Fu
PURPOSE: The purpose of this study was to compare knee kinematics and graft forces in anterior cruciate ligament (ACL) reconstruction combined with one of two superficial medial collateral ligament (sMCL) reconstruction techniques (parallel or triangular vector sMCL reconstruction). METHODS: Twenty porcine knees were divided into two groups (n = 20), parallel or triangular vector sMCL reconstruction, with both groups having anatomic single-bundle ACL reconstruction...
May 24, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28540317/relationship-of-musculotendinous-junction-location-to-harvested-semitendinosus-and-gracilis-tendon-length
#4
Omer A Ilahi, Eugene F Stautberg, David J Mansfield, Ali A Qadeer
BACKGROUND: Harvested hamstring tendon length has received scant attention in published anterior cruciate ligament (ACL) reconstruction literature, yet length can limit the ability to increase graft diameter by folding the tendon over more than once. Indeed, some ultrashort tendons may be too short to yield a clinically useful graft after being folded over just once. Ultimately, the total length of a harvested hamstring tendon may depend on the length of the tendon distal to its musculotendinous (MT) junction...
May 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28538301/proposal-of-a-new-specific-cardiopulmonary-exercise-test-for-taekwondo-athletes
#5
Marcus P Araujo, Antônio C L Nóbrega, Gabriel Espinosa, Matheus R Hausen, Renata R T Castro, Pedro P Soares, Jonas L Gurgel
Araujo, MP, Nóbrega, ACL, Espinosa, G, Hausen, MR, Castro, RRT, Soares, PP, and Gurgel, JL. Proposal of a new specific cardiopulmonary exercise test for taekwondo athletes. J Strength Cond Res 31(6): 1525-1535, 2017-The objective of this study is to evaluate the cardiorespiratory variables of Taekwondo athletes while performing incremental exercise test on an ergometer using a ramp protocol and to propose a specific protocol for assessing these physiological variables during Taekwondo practice. Fourteen athletes participated in 2 incremental exercise tests: a treadmill exercise test (TREADtest) and a Taekwondo-specific exercise test (TKDtest)...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28536977/finite-element-simulations-of-different-hamstring-tendon-graft-lengths-and-related-fixations-in-anterior-cruciate-ligament-reconstruction
#6
Chao Wan, Zhixiu Hao, Zhichang Li, Jianhao Lin
As one of the most frequently used grafts in anterior cruciate ligament (ACL) reconstruction, hamstring tendon (HT) grafts are prepared with different lengths and fixed by specific fixations in knee joints. However, there are incomplete studies to investigate both the joint kinematics and graft biomechanics in the ACL reconstructions with different HT graft lengths. In this paper, three different graft lengths (i.e., 30, 50, and 70 mm) were developed in the ACL reconstruction and analyzed using finite element method under two usual clinical test loads (i...
May 23, 2017: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/28536855/rotational-laxity-control-by-the-anterolateral-ligament-and-the-lateral-meniscus-is-dependent-on-knee-flexion-angle-a-cadaveric-biomechanical-study
#7
Timothy Lording, Gillian Corbo, Dianne Bryant, Timothy A Burkhart, Alan Getgood
BACKGROUND: Injury to the anterolateral ligament (ALL) has been reported to contribute to high-grade anterolateral laxity after anterior cruciate ligament (ACL) injury. Failure to address ALL injury has been suggested as a cause of persistent rotational laxity after ACL reconstruction. Lateral meniscus posterior root (LMPR) tears have also been shown to cause increased internal rotation of the knee. QUESTIONS/PURPOSES: The purpose of this study was to determine the functional relationship between the ALL and LMPR in the control of internal rotation of the ACL-deficient knee...
May 23, 2017: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/28536794/good-clinical-results-can-be-obtained-along-with-reduced-risk-of-tunnel-communication-with-a-new-technique-in-concomitant-meniscus-transplantation-and-acl-reconstruction
#8
Murat Bozkurt, Mesut Tahta, Mustafa Akkaya, Cetin Isik, Safa Gursoy
PURPOSE: The purpose of this study was to introduce our technical modification for concomitant meniscus transplantation and ACL reconstruction with preliminary results of our cases. METHODS: The current study comprised of two sections: first is the cadaveric study of 20 specimens. The distances between tunnel entry and exit points of tunnels for 27 meniscal transplants and ACL reconstruction in CT slices were measured. The second section was evaluation of our cases including six patients...
May 23, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28535749/analysis-of-change-in-gait-in-the-ovine-stifle-normal-injured-and-anterior-cruciate-ligament-reconstructed
#9
B J Heard, J E Beveridge, M Atarod, E J O'Brien, C Rolian, C B Frank, D A Hart, N G Shrive
BACKGROUND: Many patients who undergo anterior cruciate ligament (ACL) reconstructive surgery develop post-traumatic osteoarthritis (PTOA). ACL reconstructive surgery may not fully restore pre-injury joint biomechanics, thereby resulting in further joint damage and contributing to the development of PTOA. In an ovine model of idealized ACL reconstruction (ACL-R), it has been shown that signs of PTOA develop within surgical joints by 20 weeks post-surgery. The aim of the present study was to investigate whether altered kinematics contribute to early PTOA development within ACL-R joints of the ovine injury model by comparing the gait of these surgical animals to the gait of a stable normal control group, and an unstable injury group in which the ACL and medial collateral ligament (MCL) had been transected...
May 23, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28534847/low-power-multi-hop-networking-analysis-in-intelligent-environments
#10
Josu Etxaniz, Gerardo Aranguren
Intelligent systems are driven by the latest technological advances in many different areas such as sensing, embedded systems, wireless communications or context recognition. This paper focuses on some of those areas. Concretely, the paper deals with wireless communications issues in embedded systems. More precisely, the paper combines the multi-hop networking with Bluetooth technology and a quality of service (QoS) metric, the latency. Bluetooth is a radio license-free worldwide communication standard that makes low power multi-hop wireless networking available...
May 19, 2017: Sensors
https://www.readbyqxmd.com/read/28534321/does-anatomic-single-bundle-acl-reconstruction-using-hamstring-autograft-produce-anterolateral-meniscal-root-tearing
#11
Sebastián Irarrázaval, Angel Masferrer-Pino, Maximiliano Ibañez, Tamer M A Shehata, María Naharro, Joan C Monllau
BACKGROUND: To determine if tibial tunnel reaming during anatomic single-bundle anterior cruciate ligament (ACL) reconstruction using hamstring autograft can result in anterolateral meniscal root injury, as diagnosed by magnetic resonance imaging (MRI). METHODS: A case series of 104 primary anatomic single-bundle ACL reconstructions using hamstring autograft was retrospectively reviewed. Pre- and post-operative (>1 year) MRIs were radiologically evaluated for each patient, with a lateral meniscus extrusion > 3 mm at the level of the medial collateral ligament midportion on a coronal MRI, to establish anterolateral meniscal root injury...
December 2017: Journal of Experimental Orthopaedics
https://www.readbyqxmd.com/read/28533837/-simultaneous-bilateral-rupture-in-both-cruciate-knee-ligaments-about-a-case
#12
Mounir Yahyaoui, Abdelhafid Derfoufi, Najib Abbassi, Abdelkarim Daoudi, Omar Agoumi, Hicham Yacoubi, Abdeljaouad Najib
Bilateral cruciate ligament rupture is rare while simultaneous rupture in both anterior cruciate ligaments (ACL) is exceptional; that's why post-traumatic simultaneous bilateral cruciate ligament rupture has never been described in the literature making this case study based on patient's observation, follow-up and therapeutic discussion very interesting. The procedure was performed in two surgical steps spaced in time and results were very satisfactory for both us and patient.
2017: Pan African Medical Journal
https://www.readbyqxmd.com/read/28532890/fascial-manipulation-%C3%A2-for-persistent-knee-pain-following-acl-and-meniscus-repair
#13
Sannasi Rajasekar, Aurélie Marie Marchand
Fascial Manipulation(®) (FM) is a manual therapy approach for the treatment of musculoskeletal pain. Anomalous fascial tension is common following surgery due to surgical scar, inadequate mobility and fear of movement. Fascial tension may result in pain and loss of mobility. This case report aims at investigating the effectiveness of FM(®) on pain and function in a patient following knee surgery. A 32 years old male patient, with persisting knee pain following anterior cruciate ligament reconstruction (hamstring graft) and meniscal repair, underwent the systematic FM(®) assessment process, the selected centers of coordination of myofascial units were treated...
April 2017: Journal of Bodywork and Movement Therapies
https://www.readbyqxmd.com/read/28532507/isoprenoid-biosynthesis-in-dandelion-latex-is-enhanced-by-the-overexpression-of-three-key-enzymes-involved-in-the-mevalonate-pathway
#14
Katharina M Pütter, Nicole van Deenen, Kristina Unland, Dirk Prüfer, Christian Schulze Gronover
BACKGROUND: Latex from the dandelion species Taraxacum brevicorniculatum contains many high-value isoprenoid end products, e.g. triterpenes and polyisoprenes such as natural rubber. The isopentenyl pyrophosphate units required as precursors for these isoprenoids are provided by the mevalonate (MVA) pathway. The key enzyme in this pathway is 3-hydroxy-methyl-glutaryl-CoA reductase (HMGR) and its activity has been thoroughly characterized in many plant species including dandelion. However, two enzymes acting upstream of HMGR have not been characterized in dandelion latex: ATP citrate lyase (ACL), which provides the acetyl-CoA utilized in the MVA pathway, and acetoacetyl-CoA thiolase (AACT), which catalyzes the first step in the pathway to produce acetoacetyl-CoA...
May 22, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/28530851/chondral-injuries-and-irreparable-meniscal-tears-among-adolescents-with-anterior-cruciate-ligament-or-meniscal-tears-are-more-common-in-patients-with-public-insurance
#15
Ariel A Williams, Nickolas S Mancini, Matthew J Solomito, Carl W Nissen, Matthew D Milewski
BACKGROUND: Access to health care services is a critical component of health care reform and may differ among patients with different types of insurance. Hypothesis/Purpose: The purpose was to compare adolescents with private and public insurance undergoing surgery for anterior cruciate ligament (ACL) and/or meniscal tears. We hypothesized that patients with public insurance would have a delayed presentation from the time of injury and therefore would have a higher incidence of chondral injuries and irreparable meniscal tears and lower preoperative International Knee Documentation Committee (IKDC) scores than patients with private insurance...
May 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28530157/muscle-secreted-factors-improve-anterior-cruciate-ligament-graft-healing-an-in-vitro-and-in-vivo-analysis
#16
Corina Adriana Ghebes, Nathalie Groen, Yau Chuk Cheuk, Sai Chuen Fu, Hugo Fernandes, Daniel B Saris
One of the ligaments most often damaged during sports - the anterior cruciate ligament (ACL) - has poor healing capacity. Upon damage, reconstructive surgery is performed to restore the mechanical stability of the knee and to reduce the inflammatory milieu otherwise present in the joint. A return to normal activities, however, takes between 9 and 12 months. Thus, strategies capable of improving ACL graft healing are needed. Embryonic development of tendon and ligament (T/L) is regulated by a crosstalk between different cell types...
May 20, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28530131/a-novel-combination-of-a-polycaprolactone-fumarate-pclf-scaffold-with-polyethylene-terephthalate-pet-sutures-for-intra-articular-ligament-regeneration
#17
Joshua Parry, Eric R Wagner, Peter Kok, Mahrokh Dadsetan, Michael J Yaszemski, Andre J van Wijnen, Sanjeev Kakar
Intra-articular ligamentous injuries are typically unrepairable and have limited outcomes after graft reconstruction. A combination of porous polycaprolactone fumarate (PCLF) scaffolds with polyethylene terephthalate (PET) sutures was developed with the goal of regenerating intra-articular ligaments. Scaffolds were fabricated by injecting PCLF over 3D-printed molds containing two strands of PET suture down its central pore followed by crosslinking. Scaffolds were seeded with human mesenchymal stem cells (MSCs) from adipose tissue...
May 20, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28524769/machine-learning-for-epigenetics-and-future-medical-applications
#18
Lawrence B Holder, M Muksitul Haque, Michael K Skinner
Understanding epigenetic processes holds immense promise for medical applications. Advances in Machine Learning (ML) are critical to realize this promise. Previous studies used epigenetic data sets associated with the germline transmission of epigenetic transgenerational inheritance of disease and novel ML approaches to predict genome-wide locations of critical epimutations. A combination of Active Learning (ACL) and Imbalanced Class Learning (ICL) was used to address past problems with ML to develop a more efficient feature selection process and address the imbalance problem in all genomic data sets...
May 19, 2017: Epigenetics: Official Journal of the DNA Methylation Society
https://www.readbyqxmd.com/read/28523340/patient-and-surgical-characteristics-that-affect-revision-risk-in-dynamic-intraligamentary-stabilization-of-the-anterior-cruciate-ligament
#19
Philipp Henle, Kathrin S Bieri, Manuel Brand, Emin Aghayev, Jessica Bettfuehr, Janosch Haeberli, Martina Kess, Stefan Eggli
PURPOSE: Failure of dynamic intraligamentary stabilization (DIS) that requires revision surgery of the anterior cruciate ligament (ACL) has not been studied. The aim of this study was to investigate the incidence of revision ACL surgery, and the patient characteristics and surgery-related factors that are associated with an increased risk of ACL revision after DIS. METHODS: This study analysed a prospective, consecutively documented single-centre case series using standardized case report forms over a 2...
May 18, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28522238/biomechanical-comparison-of-four-coupled-fixation-systems-for-acl-reconstruction-with-bone-socket-or-full-tunnel-on-the-tibial-side
#20
Edoardo Monaco, Mattia Fabbri, Riccardo Maria Lanzetti, Andrea Del Duca, Luca Labianca, Andrea Ferretti
BACKGROUND: To compare in an animal model the biomechanical properties of four coupled fixation devices currently used in ACL reconstruction. Three out of four devices used a full tibial tunnel with an interference screw, while the other one system used a tibial socket and an adjustable loop suspension device. The null hypothesis is that there are no biomechanical differences between all the techniques tested. METHODS: Thirty two femur-graft-tibia complexes were mounted on a tensile machine using bovine digital extensor tendons, porcine knees and four different fixation device combinations: After a preconditioning with a tensile load of 90N for five minutes, 1000cycles between 0 and 150N were applied to the complex before the final pulled to failure...
May 15, 2017: Knee
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