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https://www.readbyqxmd.com/read/28226949/combined-gait-asymmetry-metric
#1
Tyagi Ramakrishnan, Haris Muratagic, Kyle B Reed, Tyagi Ramakrishnan, Haris Muratagic, Kyle B Reed, Kyle B Reed, Tyagi Ramakrishnan, Haris Muratagic
People with physical impairments often have asymmetric gait. To evaluate if their overall symmetry is improving during intervention, there needs to be a simple metric that can help classify gait patterns that includes multiple measures of gait asymmetry. The Combined Gait Asymmetry Metric presented here is based on the Mahalanobis distance of multiple step parameters. We tested able-bodied subjects with perturbations that involve a change in leg length, the addition of ankle weights, and a combination of both perturbations...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28224214/predictors-of-the-outcome-of%C3%A2-lumbar-disc-herniation-following-classical-surgery-laminotomy-with-discectomy
#2
Augustine Balaara, Xiao-Feng Xu, Young-Hui Huang, Li Dapeng
BACKGROUND: Several surgical variables and patient characteristics play an influential role in the prognosis of lumbar disc herniation following laminotomy with discectomy. This paper seeks to evaluate the perioperative predictor variables for the outcome of lumbar disc herniation. PATIENTS AND METHODS: From October 2013 to July 2016, 166 surgical patients were evaluated using prospectively collected data. Patients' preoperative independent variables (age, sex, body mass index, level of disc herniation, pain duration, and American Society of Anesthesiologists Physical Score) were correlated with functional outcome measures such as primary outcome measures (length of hospital stay; postoperative visual analog scale, VAS; Oswestry disability index, ODI) and secondary outcome measures (operation room time; estimated intraoperative blood loss, EBL; complications; readmission) as dependent variables...
February 21, 2017: Der Orthopäde
https://www.readbyqxmd.com/read/28222212/excellent-mid-term-results-of-a-new-polished-tapered-modular-cemented-stem-a-study-of-113-hip-replacements-with-minimum-5-year-follow-up
#3
Jens Vanbiervliet, Jan F A Somers
BACKGROUND: This prospective cohort study reports the medium-term clinical and radiographic results of 113 hips treated with a hybrid total hip replacement (THR) with a new cemented tapered cobalt-chrome (Co-Cr) stem with a titanium (Ti) modular neck (ProfemurXm®). METHOD: Between October 2008 and December 2010 we performed 115 consecutive hybrid THR with the ProfemurXm® in 105 patients. RESULTS: Survivorship of the implant (stem and modular neck) at a mean of 6...
February 18, 2017: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/28222211/the-learning-curve-for-the-direct-anterior-approach-for-total-hip-arthroplasty-a-single-surgeon-s-first-500-cases
#4
James M Hartford, Michael J Bellino
BACKGROUND: Concerns arise over the early complications encountered during the learning curve for the direct anterior approach for total hip arthroplasty. PURPOSE: The purpose of this study is to examine the learning experience of a single surgeon in adapting this approach. METHODS: The 1st 500 primary total hip arthroplasties are reviewed. The patients were evaluated out to 3 months. Rates of major complications, reoperations, periprosthetic fractures, heterotopic ossification, leg length discrepancies and lateral femoral cutaneous nerve deficits were identified for each of 100 patients...
February 17, 2017: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/28220260/three-stage-treatment-protocol-for-recalcitrant-distal-femoral-nonunion
#5
Ching-Hou Ma, Yen-Chun Chiu, Yuan-Kun Tu, Cheng-Yo Yen, Chin-Hsien Wu
INTRODUCTION: In this study, we proposed a three-stage treatment protocol for recalcitrant distal femoral nonunion and aimed to analyze the clinical results. MATERIALS AND METHODS: We retrospective reviewed 12 consecutive patients with recalcitrant distal femoral nonunion undergoing our three-stage treatment protocol from January 2010 to December 2014 in our institute. The three-stage treatment protocol comprised debridement of the nonunion site, lengthening to eliminate leg length discrepancy, deformity correction, stabilization with a locked plate, filling of the defect with cement spacer for inducing membrane formation, and bone reconstruction using a cancellous bone autograft (Masquelet technique) or free vascularized fibular bone graft...
February 20, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28218393/the-relative-position-of-the-human-fibula-to-the-tibia-influences-cross-sectional-properties-of-the-tibia
#6
Benjamin M Auerbach, Alice F Gooding, Colin N Shaw, Adam D Sylvester
OBJECTIVES: The fibula transmits loads within the lower limb of hominids. The few studies of variation in the cross-sectional geometric (CSG) properties of the fibula have established differences in its rigidity among groups engaged in distinct habitual loading activities. This study adds to this research by considering the relationship between CSG properties and the anatomical position of the fibula relative to the tibia among groups with differences in documented activity patterns. MATERIAL AND METHODS: We used pQCT scans taken at 50% of the length of the lower leg in 83 healthy young adult collegiate-aged individuals divided into five activity groups: runners, swimmers, cricketers, field hockey players, and non-athletes...
February 20, 2017: American Journal of Physical Anthropology
https://www.readbyqxmd.com/read/28215886/effect-of-following-recommendations-for-tiestall-configuration-on-neck-and-leg-lesions-lameness-cleanliness-and-lying-time-in-dairy-cows
#7
V Bouffard, A M de Passillé, J Rushen, E Vasseur, C G R Nash, D B Haley, D Pellerin
Cow comfort in tiestalls is directly affected by stall dimensions, for which some recommendations exist. To evaluate how well Canadian dairy farms with tiestalls complied with recommendations for stall dimensions, as well as the effect of compliance on cow comfort and cleanliness, we assessed lactating Holstein cows (n = 3,485) on 100 tiestall dairy farms for neck and leg lesions, lameness, and cleanliness and measured time spent lying down. Data on stall dimensions (width and length of the stall, position and height of the tie rail, length of the chain, and height of the manger curb) were recorded for each cow...
February 16, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28208109/stability-against-backward-balance-loss-age-related-modifications-following-slip-like-perturbations-of-multiple-amplitudes
#8
Dario Martelli, Federica Aprigliano, Peppino Tropea, Guido Pasquini, Silvestro Micera, Vito Monaco
Falls are one of the most serious problems in the elderly. Although previous studies clearly link the increased risk of falls with ageing, the mechanisms responsible for the modifications of reactive motor behaviours in response to external perturbations are not yet fully understood. This study investigated how the stability against backward balance loss is affected by aging and intensity of perturbations. The Margin of Stability (MoS) was estimated while eight young and eight elderly adults managed three slip-like perturbations of different intensities while walking at the same normalized speed...
February 9, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28208087/morphomechanical-alterations-in-the-medial-gastrocnemius-muscle-in-patients-with-a-repaired-achilles-tendon-associations-with-outcome-measures
#9
Wei-Chen Peng, Yi-Ping Chang, Yuan-Hung Chao, S N Fu, Christer Rolf, Tiffany Tf Shih, Sheng-Chu Su, Hsing-Kuo Wang
BACKGROUND: Functional deficits are found in ankles that have sustained an Achilles rupture. This study sought to evaluate and compare the morphomechanical characteristics of the medial gastrocnemius muscle in the legs of participants within six months of a unilateral Achilles repair to determine any correlations between those characteristics and objective outcomes and self-reported functional levels. METHODS: Fifteen participants were assessed via measurements of muscle morphologies (fascicle length, pennation angle, and muscle thickness) in a resting state, the mechanical properties of the proximal aponeurosis of the medial gastrocnemius muscle, the pennation angle during ramping maximal voluntary isometric contractions (MVIC), the heel raise test, and the Taiwan Chinese version of the Lower Extremity Functional Scale (LEFS-TC) questionnaire...
February 8, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28207972/anatomical-study-of-the-inferior-patellar-pole-and-patellar-tendon
#10
M Edama, I Kageyama, M Nakamura, T Kikumoto, E Nakamura, W Ito, T Takabayashi, T Inai, H Onishi
In this study, detailed investigations of the shape of the inferior patellar pole, the site of the patellar tendon attachment, and the length and course of the patellar tendon were performed with the aim of examining the anatomical factors involved in the developmental mechanism of patellar tendinitis.  The investigation examined 100 legs from 50 cadavers. The inferior patellar pole was classified into three types: Pointed, Intermediate, and Blunt. The attachment of the patellar tendon to the inferior patellar pole was classified into two types: an anterior and a posterior...
February 16, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28188335/posterior-cruciate-ligament-reconstruction-in-skeletal-immature-children
#11
Ole Gade Sørensen, Peter Faunø, Svend Erik Christiansen, Martin Lind
PURPOSE: Rupture of the posterior cruciate ligament (PCL) is a rare knee injury in children with open growth plates. The follow-up results of six patients with open physes treated with PCL reconstruction are presented. The objective is to evaluate the clinical outcomes of PCL reconstruction for six skeletally immature patients. METHODS: Between 2006 and 2010, six skeletally immature patients were treated with PCL reconstruction. At the time of surgery, the median age was 9 years (range 6-14)...
February 10, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28187305/improvement-of-upper-trunk-posture-during-walking-in-hemiplegic-patients-after-injections-of-botulinum-toxin-into-the-arm
#12
Harald Hefter, Dietmar Rosenthal
BACKGROUND: It has been hypothesized that altered trunk movements during gait in post-stroke patients or children with cerebral palsy are compensatory to lower limb impairment. Improvement of trunk movements and posture after injections of botulinum toxin into the affected arm would be at variance with this hypothesis and hint towards a multifactorial trunk control deficit. PATIENTS AND METHODS: Clinical gait analysis was performed in 11 consecutively recruited hemiplegic patients immediately before and 4weeks after a botulinum toxin type A-injection into the affected arm...
January 26, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28183152/genetic-correlations-between-male-reproductive-traits-and-growth-traits-in-growth-performance-tested-duroc-landrace-and-yorkshire-breed-boars
#13
Hsiu-Luan Chang, Yung-Yu Lai, Ming-Che Wu, Osamu Sasaki
Male-related traits at 180-225 days of age for 6464 grow-finish performance tested boars were measured from 2000 to 2016. Heritability estimates and genetic correlations among average daily gain, feed efficiency, back fat thickness, teat counts, mounting libido, leg locomotion, penile length, sperm motility, sperm concentration and total sperm counts were estimated by VCE software using a multiple traits animal model in each breed. Growth-tested boars had heritability estimates of male reproductive traits in 0...
February 9, 2017: Animal Science Journal, Nihon Chikusan Gakkaihō
https://www.readbyqxmd.com/read/28182970/reconstruction-of-human-swing-leg-motion-with-passive-biarticular-muscle-models
#14
Maziar Ahmad Sharbafi, Aida Mohammadi Nejad Rashty, Christian Rode, Andre Seyfarth
Template models, which are utilized to demonstrate general aspects in human locomotion, mostly investigate stance leg operation. The goal of this paper is presenting a new conceptual walking model benefiting from swing leg dynamics. Considering a double pendulum equipped with combinations of biarticular springs for the swing leg beside spring-mass (SLIP) model for the stance leg, a novel SLIP-based model, is proposed to explain human-like leg behavior in walking. The action of biarticular muscles in swing leg motion helps represent human walking features, like leg retraction, ground reaction force and generating symmetric walking patterns, in simulations...
February 6, 2017: Human Movement Science
https://www.readbyqxmd.com/read/28167324/re-organizing-inpatient-care-saves-legs-in-patients-with-diabetic-foot-infections
#15
Miska Laakso, Mikael Honkasalo, Juha Kiiski, Meri Ala-Houhala, Heidi Haapasalo, Heikki-Jussi Laine, Tiina Luukkaala, Jorma Lahtela, Ilkka Kaartinen
AIMS: In this study, we evaluated the effects of the re-organization of inpatient care for patients with a diabetic foot infection, and the implementation of a specialized multi-disciplinary wound department at an academic tertiary hospital. METHODS: This was a retrospective cohort study, comprising 272 patients treated for diabetic foot infections in 2006-2007 (Group 1, n=124) and 2013-2014 (Group 2, n=148). In 2012, inpatient care of all chronic wounds was centralized at a single wound department with a multi-disciplinary team...
January 22, 2017: Diabetes Research and Clinical Practice
https://www.readbyqxmd.com/read/28164055/proximal-tibial-epiphysis-injury-flexion-type-salter-harris-type-1
#16
Pratik Israni, Mangesh Panat
INTRODUCTION: Fractures of the proximal tibial epiphysis rare. It has been estimated that fractures of the upper tibial epiphysis account for 0.5-3.1% of all epiphyseal injuries. Who had no neurovascular deficit, with fixed extension deformity at the left knee was treated early with closed reduction techniques. CASE REPORT: We present a case of a 16-year-old boy who while playing cricket on the road was hit by a car. The patient presented in emergency room with extremely swollen knee and soft tissue swelling (hemarthrosis), he was unable to lift his leg actively due to severe pain because of hamstrings spasm, and he had no wound over his left knee and had no other associated injuries...
September 2016: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/28160082/periodization-effects-during-short-term-resistance-training-with-equated-exercise-variables-in-females
#17
Thiemo Pelzer, Boris Ullrich, Mark Pfeiffer
PURPOSE: During resistance training, volume and load can be altered either gradually (traditional periodization: TP) or with frequent changes between subsequent sessions (daily undulating periodization: DUP). We hypothesized that the periodization model employed would not impact upon training-induced adaptations when exercise variables are equated. METHODS: Nineteen females (22.0 years, moderate resistance training experience of 27.9 months) performed 6 weeks of knee extensor training with 3 weekly sessions exercising one leg using TP and the contralateral leg using DUP...
February 3, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28159052/complex-ankle-arthrodesis-with-step-cut-osteotomy-in-charcot-arthropathy-with-bone-loss
#18
Sean Booth, Moez Ballal, Anand Pillai
We report a case of a complex limb salvage ankle arthrodesis in a patient with Charcot arthropathy. A step-cut osteotomy was performed in order to tackle the issues of anterior tibial bone loss; worsening leg length discrepancy; soft tissue contraction; joint instability and high risk of non-union. The construct formed by the step-cut allowed for the preservation of good bone stock; avoidance of further limb shortening; increased torsional stability and increased surface area for bony union. This resulted in a patient with a stable, plantigrade foot appropriate for footwear...
March 2017: Foot and Ankle Surgery: Official Journal of the European Society of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/28157918/influence-of-axial-force-errors-on-the-deformation-of-the-4%C3%A2-%C3%A2-m-lightweight-mirror-and-its-correction
#19
Bin Lan, Xiaoxia Wu, Jianfeng Li, Ming Ming, Xiangyi Liu, Hongbo Yang
The lightweight primary mirror of the four meter Chinese telescope is supported axially by a passive hydraulic system, in parallel with an active system. The figure is sensitive to the errors in the axial forces, which can be effectively corrected using active optics. The squared RMS of this figure approximately follows the χ<sup>2</sup> distribution, as verified by Monte Carlo analysis. The probability distributions of the squared norm of the active-forces vector, of the squared norm of the leg-lengths vector in the hexapod platform, and of the squared RMS of the residual figure are discussed in terms of the bending modes obtained by singular-value decomposition of the influence matrix, the optical sensitivity matrix deduced through ray trace, and the Jacobian matrix of the hexapod platform...
January 20, 2017: Applied Optics
https://www.readbyqxmd.com/read/28157576/alterations-in-over-ground-walking-patterns-in-obese-and-overweight-adults
#20
Hao Meng, Daniel P O'Connor, Beom-Chan Lee, Charles S Layne, Stacey L Gorniak
Obesity has been associated with negative effects on postural control, including falls. Previous studies revealed different outcomes regarding the effects of obesity on gait features, and the use of BMI may lead to bias in assessing the true effects of obesity on gait. To better understand the effects of obesity on gait, it is important to examine gait features and associated body composition measures. The purpose of this study was: (1) to assess gait features of normal weight, overweight and obese adults, and (2) to assess the relationship between body composition measures and gait features...
January 24, 2017: Gait & Posture
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