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https://www.readbyqxmd.com/read/29744948/presynaptic-inhibition-decreases-when-estrogen-level-rises
#1
M A Hoffman, J R Doeringer, M F Norcross, S T Johnson, P E Chappell
The objective was to determine estrogen's influence on control of a skeletal muscle through measurements of motorneuron excitability (H:M ratio) and presynaptic inhibition (PI). Estrogen serum concentrations were measured at menses and ovulation of female subjects and compared to male controls. Data was analyzed from 12 females and 13 males reporting no history of knee ligament injury. Females reported regular menstrual cycles and no hormone-based contraceptive use for the previous year. Females were tested at menses (Time1) and ovulation (Time2)...
May 9, 2018: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29724468/trends-in-isolated-meniscus-repair-and-meniscectomy-in-japan-2011-2016
#2
Hisako Katano, Hideyuki Koga, Nobutake Ozeki, Koji Otabe, Mitsuru Mizuno, Makoto Tomita, Takeshi Muneta, Ichiro Sekiya
BACKGROUND: Meniscus surgery is the most commonly performed orthopedic surgery, and despite recent emphasis on saving the meniscus, the current status of meniscus surgeries is little known in many countries, including Japan. The National Database of Health Insurance Claims and Specific Health Checkups of Japan and the Statistics of Medical Care Activities in Public Health Insurance track meniscus surgeries through health insurance claims. The National Database provides the numbers for 2014 and 2015, and the Statistics of Medical Care Activities provides the numbers from June 2011 to June 2016...
April 30, 2018: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/29705749/quadriceps-tendon-autograft-for-arthroscopic-knee-ligament-reconstruction-use-it-now-use-it-often
#3
REVIEW
Andrew J Sheean, Volker Musahl, Harris S Slone, John W Xerogeanes, Danko Milinkovic, Christian Fink, Christian Hoser
Traditional bone-patellar tendon-bone and hamstring tendon ACL grafts are not without limitations. A growing body of anatomic, biomechanical and clinical data has demonstrated the utility of quadriceps tendon autograft in arthroscopic knee ligament reconstruction. The quadriceps tendon autograft provides a robust volume of tissue that can be reliably harvested, mitigating the likelihood of variably sized grafts and obviating the necessity of allograft augmentation. Modern, minimally invasive harvest techniques offer the advantages of low rates of donor site morbidity and residual extensor mechanism strength deficits...
April 28, 2018: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/29687012/sex-based-differences-of-medial-collateral-ligament-and-anterior-cruciate-ligament-strains-with-cadaveric-impact-simulations
#4
Nathan D Schilaty, Nathaniel A Bates, Christopher V Nagelli, Aaron J Krych, Timothy E Hewett
Background: Female patients sustain noncontact knee ligament injuries at a greater rate compared with their male counterparts. The cause of these differences in the injury rate and the movements that load the ligaments until failure are still under dispute in the literature. Purpose/Hypotheses: This study was designed to determine differences in anterior cruciate ligament (ACL) and medial collateral ligament (MCL) strains between male and female cadaveric specimens during a simulated athletic task...
April 2018: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29659299/low-1-year-return-to-sport-rate-after-anterior-cruciate-ligament-reconstruction-regardless-of-patient-and-surgical-factors-a-prospective-cohort-study-of-272-patients
#5
Eric Hamrin Senorski, Eleonor Svantesson, Susanne Beischer, Christoffer Thomeé, Roland Thomeé, Jón Karlsson, Kristian Samuelsson
BACKGROUND: There is insufficient knowledge about the way that concomitant injuries affect the short-term likelihood of a return to a knee-strenuous sport after anterior cruciate ligament (ACL) reconstruction. Hypotheses/Purpose: The purpose was to study whether patient characteristics, concomitant injuries, and graft choice at primary ACL reconstruction can predict return to sport (RTS) 1 year after surgery. The hypotheses were that younger age at the time of ACL reconstruction would positively affect RTS, while the presence of concomitant injuries would negatively affect RTS 1 year after surgery...
April 1, 2018: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29628130/strain-imaging-of-the-lateral-collateral-ligament-using-high-frequency-and-conventional-ultrasound-imaging-an-ex-vivo-comparison
#6
Kaj Gijsbertse, André Sprengers, Hamid Naghibi Beidokhti, Maartje Nillesen, Chris de Korte, Nico Verdonschot
Recent first attempts of in situ ultrasound strain imaging in collateral ligaments encountered a number of challenges and illustrated a clear need for additional studies and more thorough validation of the available strain imaging methods. Therefore, in this study we experimentally validated ultrasound strain measurements of ex vivo human lateral collateral ligaments in an axial loading condition. Moreover, the use of high frequency ultrasound (>20 MHz) for strain measurement was explored and its performance compared to conventional ultrasound...
March 29, 2018: Journal of Biomechanics
https://www.readbyqxmd.com/read/29600679/-diagnostic-value-of-mri-for-posterior-root-tear-of-medial-and-lateral-meniscus
#7
Yue-Nan Qian, Fang Liu, Yi-Long Dong, Chun-Yuan Cai
OBJECTIVE: To explore diagnostic value of MRI on posterior root tear of medial and lateral meniscus. METHODS: From January 2012 to January 2016, clinical data of 43 patients with meniscal posterior root tear confirmed by arthroscopy were retrospective analyzed, including 25 males and 18 females, aged from 27 to 69 years old with an average age of(42.5±8.3)years old;27 cases on the right side and 16 cases on the left side. MRI examinations of 43 patients with tear of posterior meniscus root confirmed by knee arthroscopies were retrospectively reviewed...
March 25, 2018: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29568787/sex-based-differences-in-knee-kinetics-with-anterior-cruciate-ligament-strain-on-cadaveric-impact-simulations
#8
Nathan D Schilaty, Nathaniel A Bates, Christopher Nagelli, Aaron J Krych, Timothy E Hewett
Background: Females are at an increased risk of sustaining noncontact knee ligament injuries as compared with their male counterparts. The kinetics that load the anterior cruciate ligament (ACL) are still under dispute in the literature. Purpose/Hypothesis: The purpose of this study was to determine whether there are differences in knee kinetics between the sexes that lead to greater ACL strain in females when similar external loads are applied during a simulated drop vertical jump landing task...
March 2018: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29556890/septic-arthritis-after-arthroscopic-posterior-cruciate-ligament-and-multi-ligament-reconstructions-is-rare-and-can-be-successfully-treated-with-arthroscopic-irrigation-and-debridement-analysis-of-866-reconstructions
#9
Philipp Schuster, Markus Geßlein, Philipp Mayer, Michael Schlumberger, Raul Mayr, Jörg Richter
PURPOSE: The purpose of this study was to determine the incidence of septic arthritis following arthroscopic posterior cruciate ligament (PCL) and multi-ligament reconstructions, and to evaluate a treatment regime with sequential arthroscopic irrigation and debridement procedures combined with antibiotic therapy that is focused on retention of the graft. METHODS: Between 2004 and 2016 a total of 866 PCL reconstructions and multi-ligament reconstructions were performed at our institution (408 isolated PCL reconstructions, 458 combined reconstructions)...
March 20, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29549559/no-effectiveness-of-anticoagulants-for-thromboprophylaxis-after-non-major-knee-arthroscopy-a-systemic-review-and-meta-analysis-of-randomized-controlled-trials
#10
REVIEW
Gang Zheng, Qian Tang, Ping Shang, Xiao-Yun Pan, Hai-Xiao Liu
Arthroscopic knee surgery is the most commonly performed orthopedic procedure worldwide and whether thromboprophylaxis should be undertaken after knee arthroscopy is still controversial. To evaluate the efficacy of thromboprophylaxis for deep venous thrombosis (DVT) and venous thromboembolism (VTE) after knee arthroscopic surgery. A meta-analysis was conducted using data from eight randomized trials (4148 patients) to compare thromboprophylaxis with placebo or no prophylactic treatment in patients undergoing knee arthroscopy...
May 2018: Journal of Thrombosis and Thrombolysis
https://www.readbyqxmd.com/read/29534271/multiple-ligament-knee-injuries
#11
Gregory C Fanelli, David G Fanelli
The posterior cruciate ligament (PCL)-based multiple ligament injury, or dislocated knee, is often part of a multisystem injury complex that not only includes the knee ligaments, but may also include blood vessels, skin, nerves, fractures, and other organ system trauma. These factors must be considered in the scope of treating this complex knee injury. These complex knee ligament injuries can result in significant functional instability for the affected individual. This article will discuss multiple ligament knee injuries evaluation, treatment, and special considerations in the pediatric and adolescent population...
May 2018: Journal of Knee Surgery
https://www.readbyqxmd.com/read/29517924/meaningful-change-scores-in-the-knee-injury-and-osteoarthritis-outcome-score-in-patients-undergoing-anterior-cruciate-ligament-reconstruction
#12
Lina Holm Ingelsrud, Caroline B Terwee, Berend Terluin, Lars-Petter Granan, Lars Engebretsen, Kathryn A G Mills, Ewa M Roos
BACKGROUND: Meaningful change scores in the Knee injury and Osteoarthritis Outcome Score (KOOS) in patients undergoing anterior cruciate ligament (ACL) reconstruction have not yet been established. PURPOSE: To define the minimal important change (MIC) for the KOOS after ACL reconstruction. STUDY DESIGN: Cohort study (diagnosis); Level of evidence, 2. METHODS: KOOS and anchor questions with 7-point scales ranging from "better, an important improvement" to "worse, an important worsening" were completed postoperatively by randomly chosen participants from the Norwegian Knee Ligament Registry...
April 2018: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29498035/variations-in-internal-structure-composition-and-protein-distribution-between-intra-and-extra-articular-knee-ligaments-and-tendons
#13
Yalda A Kharaz, Elizabeth G Canty-Laird, Simon R Tew, Eithne J Comerford
Tendons and ligaments play key roles in the musculoskeletal system in both man and animals. Both tissues can undergo traumatic injury, age-related degeneration and chronic disease, causing discomfort, pain and increased susceptibility to wider degenerative joint disease. To date, tendon and ligament ultrastructural biology is relatively under-studied in healthy, non-diseased tissues. This information is essential to understand the pathology of these tissues with regard to function-related injury and to assist with the future development of tissue-engineered tendon and ligament structures...
March 2, 2018: Journal of Anatomy
https://www.readbyqxmd.com/read/29492642/meniscus-repair-with-simultaneous-acl-reconstruction-demonstrated-similar-clinical-outcomes-as-isolated-acl-repair-a-result-not-seen-with-meniscus-resection
#14
Mark Phillips, Erik Rönnblad, Love Lopez-Rengstig, Eleonor Svantesson, Anders Stålman, Kalle Eriksson, Olufemi R Ayeni, Kristian Samuelsson
PURPOSE: To compare Knee Injury and Osteoarthritis Outcome Score (KOOS) and EuroQol-5D (EQ-5D) subscale scores at 2-year follow-up for patients with primary isolated ACL reconstruction with patients undergoing ACL reconstruction and simultaneous meniscal treatment in terms of either resection or repair in the Swedish National Knee Ligament Register (SNKLR). METHODS: All ACL reconstruction patients within the SNKLR at 2-year follow-up were reviewed. The KOOS and EQ-5D subscales were assessed in four distinct patient groups: isolated ACL reconstruction, ACL reconstruction + medial meniscus resection, ACL reconstruction + lateral meniscus resection, ACL reconstruction + medial meniscus repair, and ACL reconstruction + lateral meniscus repair...
February 28, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29485291/differences-between-men-and-women-in-balance-and-tremor-in-relation-to-plantar-fascia-laxity-during-the-menstrual-cycle
#15
Haneul Lee, Jerrold Petrofsky
CONTEXT:   Although much attention has been paid to the effect of estrogen on the knee ligaments, little has been done to examine the ligaments in the foot, such as the plantar fascia, and how they may be altered during the menstrual cycle. OBJECTIVE:   To (1) examine sex differences in plantar fascia thickness and laxity and postural sway and (2) identify any menstrual cycle effects on plantar fascia laxity, postural sway, and neuromuscular tremor between menstruation and the ovulation phase...
March 2018: Journal of Athletic Training
https://www.readbyqxmd.com/read/29457342/soft-tissue-balancing-in-total-knee-arthroplasty-using-sensor-guided-assessment-is-there-a-learning-curve
#16
Monther A Gharaibeh, Darren B Chen, Samuel J MacDessi
BACKGROUND: Sensor-guided assessment for soft tissue balance in total knee arthroplasty (TKA) has been reported to improve patient satisfaction and self-reported outcome scores. As more surgeons adopt this technology in TKA, we performed this study to identify if there is a learning curve with its use. METHODS: Analysis of a total of 90 consecutive cases was performed in this study. Initial and final intercompartmental pressure differences were recorded before and after knee ligament balancing...
February 18, 2018: ANZ Journal of Surgery
https://www.readbyqxmd.com/read/29433154/quality-of-life-and-functional-outcomes-after-multiligament-knee-reconstruction
#17
George F Rick Hatch, Diego Villacis, Dhanur Damodar, Michael Dacey, Anthony Yi
We aimed to determine factors that affect the quality of life of patients undergoing a standardized surgical and postoperative management protocol for knee dislocations. A total of 31 patients (33 knees) were included in this study. We contacted patients at a minimum of 12 months postoperatively (mean: 38 months; range, 12-111 months) and administered the previously validated Multiligament Quality of Life questionnaire (ML-QOL), 2000 International Knee Documentation Committee Subjective Knee Form (IKDC), and Lysholm Knee Scoring Scale...
February 12, 2018: Journal of Knee Surgery
https://www.readbyqxmd.com/read/29404655/concomitant-injuries-may-not-reduce-the-likelihood-of-achieving-symmetrical-muscle-function-one-year-after-anterior-cruciate-ligament-reconstruction-a-prospective-observational-study-based-on-263-patients
#18
Eric Hamrin Senorski, Eleonor Svantesson, Susanne Beischer, Christoffer Thomeé, Alberto Grassi, Ferid Krupic, Roland Thomeé, Jón Karlsson, Kristian Samuelsson
PURPOSE: A better understanding of patient characteristics and the way common concomitant injuries affect the recovery of muscle function after surgery should help providers to treat patients with anterior cruciate ligament (ACL) injuries. The aim of this study was to determine whether patient characteristics, concomitant injuries and graft choice at ACL reconstruction were associated with symmetrical knee muscle function at one year. The hypothesis was that the presence of concomitant injuries would negatively influence the opportunity to achieve symmetrical knee function at the one-year follow-up...
February 5, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29387641/mri-evaluation-to-predict-tendon-size-for-knee-ligament-reconstruction
#19
Lawrence Camarda, Emanuele Grassedonio, Domenico Albano, Massimo Galia, Massimo Midiri, Michele D'Arienzo
Background: The aim of this study is to evaluate a possible correlation between specific anthropometric parameters and sizes of knee tendons commonly used for ACL reconstruction. We hypothesized that specific clinical and radiological knee measurements could be better tendon sizes predictors than age, gender, height and weight. Materials and methods: 100 consecutive patients were enrolled and 77 patients met the inclusion criteria of the study. All patients underwent a MRI of the knee with a 1...
July 2017: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/29381438/analysis-of-the-influence-of-passenger-vehicles-front-end-design-on-pedestrian-lower-extremity-injuries-by-means-of-the-llms-model
#20
Alessandro Scattina, Fuhao Mo, Catherine Masson, Massimiliano Avalle, Pierre Jean Arnoux
OBJECTIVE: This work aims at investigating the influence of some front-end design parameters of a passenger vehicle on the behavior and damage occurring in the human lower limbs when impacted in an accident. METHODS: The analysis is carried out by means of finite element analysis using a generic car model for the vehicle and the lower limbs model for safety (LLMS) for the purpose of pedestrian safety. Considering the pedestrian standardized impact procedure (as in the 2003/12/EC Directive), a parametric analysis, through a design of experiments plan, was performed...
January 30, 2018: Traffic Injury Prevention
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