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https://www.readbyqxmd.com/read/28632058/assessment-of-model-based-image-matching-for-future-reconstruction-of-unhelmeted-sport-head-impact-kinematics
#1
Gregory J Tierney, Hamed Joodaki, Tron Krosshaug, Jason L Forman, Jeff R Crandall, Ciaran K Simms
Player-to-player contact inherent in many unhelmeted sports means that head impacts are a frequent occurrence. Model-Based Image-Matching (MBIM) provides a technique for the assessment of three-dimensional linear and rotational motion patterns from multiple camera views of a head impact event, but the accuracy is unknown for this application. The goal of this study is to assess the accuracy of the MBIM method relative to reflective marker-based motion analysis data for estimating six degree of freedom head displacements and velocities in a staged pedestrian impact scenario at 40 km/h...
February 28, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/28631970/computerized-neuropsychological-test-performance-of-youth-football-players-at-different-positions-a-comparison-of-high-and-low-contact-players
#2
William T Tsushima, Hyeong Jun Ahn, Andrea M Siu, Tama Fukuyama, Nathan M Murata
The aim of this study was to examine the effects of head impact frequency on the neuropsychological test results of football players who participate in different positions on the team. Based on the biomechanical measures of head impact frequency reported in high school football, a High Contact group (n = 480) consisting of offensive and defensive linemen was compared with a Low Contact group (n = 640) comprised of receivers and defensive backs. The results revealed that the High Contact group obtained poorer performances on the Immediate Post-Concussion Assessment and Cognitive Testing (ImPACT) on three Composite scores (Verbal Memory, Visual Motor Speed, Impulse Control) and the Total Symptom score compared to the Low Contact group...
February 28, 2017: Applied Neuropsychology. Child
https://www.readbyqxmd.com/read/28625686/the-influence-of-contamination-and-cleaning-on-the-strength-of-modular-head-taper-fixation-in-total-hip-arthroplasty
#3
Annika Krull, Michael M Morlock, Nicholas E Bishop
BACKGROUND: Intraoperative interface contamination of modular head-stem taper junctions of hip implants can lead to poor fixation strength, causing fretting and crevice corrosion or even stem taper fracture. Careful cleaning before assembly should help to reduce these problems. The purpose of this study was to determine the effect of cleaning (with and without drying) contaminated taper interfaces on the taper fixation strength. METHODS: Metal or ceramic heads were impacted onto titanium alloy stem tapers with cleaned or contaminated (fat or saline solution) interfaces...
May 13, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28622848/average-male-and-female-virtual-dummy-model-biorid-and-evarid-simulations-with-two-seat-concepts-in-the-euro-ncap-low-severity-rear-impact-test-configuration
#4
Astrid Linder, Kristian Holmqvist, Mats Y Svensson
Soft tissue neck injuries, also referred to as whiplash injuries, which can lead to long term suffering accounts for more than 60% of the cost of all injuries leading to permanent medical impairment for the insurance companies, with respect to injuries sustained in vehicle crashes. These injuries are sustained in all impact directions, however they are most common in rear impacts. Injury statistics have since the mid-1960s consistently shown that females are subject to a higher risk of sustaining this type of injury than males, on average twice the risk of injury...
June 13, 2017: Accident; Analysis and Prevention
https://www.readbyqxmd.com/read/28620893/systemic-antibiotics-for-preventing-ventilator-associated-pneumonia-in-comatose-patients-a-systematic-review-and-meta-analysis
#5
Cássia Righy, Pedro Emmanuel Americano do Brasil, Jordi Vallés, Fernando A Bozza, Ignacio Martin-Loeches
BACKGROUND: Early-onset ventilator-associated pneumonia (EO-VAP) is the leading cause of morbidity and mortality in comatose patients. However, VAP prevention bundles focus mainly on late-onset VAP and may be less effective in preventing EO-VAP in comatose patients. Systemic antibiotic administration at the time of intubation may have a role in preventing EO-VAP. Therefore, we evaluated the effectiveness of systemic antibiotic administration in VAP prevention in comatose patients through a systematic review and meta-analysis...
December 2017: Annals of Intensive Care
https://www.readbyqxmd.com/read/28620209/using-variable-importance-measures-to-identify-a-small-set-of-snps-to-predict-heading-date-in-perennial-ryegrass
#6
Stephen L Byrne, Patrick Conaghan, Susanne Barth, Sai Krishna Arojju, Michael Casler, Thibauld Michel, Janaki Velmurugan, Dan Milbourne
Prior knowledge on heading date enables the selection of parents of synthetic cultivars that are well matched with respect to time of heading, which is essential to ensure plants put together will cross pollinate. Heading date of individual plants can be determined via direct phenotyping, which has a time and labour cost. It can also be inferred from family means, although the spread in days to heading within families demands roguing in first generation synthetics. Another option is to predict heading date from molecular markers...
June 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28614998/a-season-of-american-football-is-not-associated-with-changes-in-plasma-tau
#7
Jonathan Oliver, Margaret Jones, Anthony Anzalone, Michele Kirk, David Gable, Justin Repshas, Torie Johnson, Kina Hogland, Kaj Blennow, Henrik Zetterberg
American football athletes are routinely exposed to sub-concussive impacts over the course of the season. This study sought to examine the effect of a season of American football on plasma tau, a potential marker of axonal damage. Nineteen (n =19) National Collegiate Association (NCAA) American football athletes underwent serial blood sampling over the course of the 2014-2015 season at those times in which the number and magnitude of head impacts likely changed. Non-contact, sport-control, NCAA men's swim athletes (n=19) provided a single plasma sample for comparison...
June 14, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/28614590/chronic-ethanol-during-adolescence-impacts-corticolimbic-dendritic-spines-and-behavior
#8
Nicholas J Jury, Gabrielle A Pollack, Meredith J Ward, Jessica L Bezek, Alexandra J Ng, Courtney R Pinard, Hadley C Bergstrom, Andrew Holmes
BACKGROUND: Risk for alcohol use disorders (AUDs) in adulthood is linked to alcohol drinking during adolescence, but understanding of the neural and behavioral consequences of alcohol exposure during adolescence remains incomplete. Here, we examined the neurobehavioral impact of adolescent chronic intermittent EtOH (CIE) vapor exposure in mice. METHODS: C57BL/6J-background Thy1-EGFP mice were CIE-exposed during adolescence or adulthood and examined, as adults, for alterations in the density and morphology of dendritic spines in infralimbic (IL) cortex, prelimbic (PL) cortex, and basolateral amygdala (BLA)...
June 14, 2017: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/28614141/role-of-hemorrhagic-shock-in-experimental-polytrauma
#9
Stephanie Denk, Sebastian Weckbach, Philipp Eisele, Christian K Braun, Rebecca Wiegner, Julia J Ohmann, Lisa Wrba, Felix M Hoenes, Philipp Kellermann, Peter Radermacher, Ulrich Wachter, Sebastian Hafner, Oscar McCook, Anke Schultze, Annette Palmer, Sonja Braumüller, Florian Gebhard, Markus Huber-Lang
Hemorrhagic shock (HS) after tissue trauma increases the complication and mortality rate of polytrauma (PT) patients. Although several murine trauma models have been introduced, there is a lack of knowledge about the exact impact of an additional HS. We hypothesized that HS significantly contributes to organ injury, which can be reliably monitored by detection of specific organ damage markers.Therefore we established a novel clinically relevant PT plus HS model in C57BL/6 mice which were randomly assigned to control, HS, PT or PT+HS procedure (n = 8 per group)...
June 13, 2017: Shock
https://www.readbyqxmd.com/read/28611959/measuring-the-impact-of-femoral-head-size-on-dislocation-rates-following-total-hip-arthroplasty
#10
Min-Wook Kim, Young-Yool Chung, Ji-Won Lee, Chel-Hwan Kim
PURPOSE: The purpose of this study was to evaluate if the femoral head's size has an impact on dislocation rates following total hip arthroplasty (THA). MATERIALS AND METHODS: Five hundreds forty-three THA performed using a posterolateral approach in our hospital and followed up more than 6 months were included in this study. We evaluated dislocation rates based on the size of femoral head (28 mm vs. over 32 mm) and further investigated the dislocation rates classified into primary and revision surgery...
June 2017: Hip & Pelvis
https://www.readbyqxmd.com/read/28608777/tumor-metabolism-in-the-microenvironment-of-nodal-metastasis-in-oral-squamous-cell-carcinoma
#11
Joseph Curry, Patrick Tassone, Kurren Gill, Madalina Tuluc, Voichita BarAd, Mehri Mollaee, Diana Whitaker-Menezes, Ulrich Rodeck, Adam Luginbuhl, David Cognetti, William Keane, Ubaldo Martinez-Outschoorn
Objective In many cancers, including head and neck squamous cell carcinoma (HNSCC), different regions within a tumor have different metabolic phenotypes. Transfer of metabolites between compartments promotes tumor growth and aggressive behavior. Metabolic compartmentalization in HNSCC nodal metastases has not been studied, nor has its impact on extracapsular extension or clinical outcomes been determined. Study Design Retrospective analysis based on immunohistochemistry staining. Setting Tertiary care center...
June 1, 2017: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/28608546/developing-potentiometric-surfaces-and-flow-fields-with-a-head-specified-modflow-model
#12
Daniel B Abrams, George S Roadcap, Devin Mannix
Investigating changes in an aquifer system often involves comparison of observed heads from different synoptic measurements, generally with potentiometric surfaces developed by hand or a statistical approach. Alternatively, head-specified MODFLOW models, in which constant head cells simulate observed heads, generate gridded potentiometric surfaces that explicitly account for Darcy's Law and mass balance. We developed a transient head-specified MODFLOW model for the stratified Cambrian-Ordovician sandstone aquifer system of northeastern Illinois to analyze flow within its 275 m deep cone of depression...
June 13, 2017: Ground Water
https://www.readbyqxmd.com/read/28607676/evaluating-the-quality-improvement-impact-of-the-global-tracheostomy-collaborative-in-four-diverse-nhs-hospitals
#13
Brendan A McGrath, James Lynch, Barbarella Bonvento, Sarah Wallace, Val Poole, Ann Farrell, Cristina Diaz, Sadie Khwaja, David W Roberson
Tracheostomies are predominantly used in Head & Neck Surgery and the critically ill. The needs of these complex patients frequently cross traditional speciality working boundaries and locations and any resulting airway problems can rapidly lead to significant harm. The Global Tracheostomy Collaborative (GTC) was formed in 2012 with the aim of bringing together international expertise in tracheostomy care in order to bring about rapid adoption of best practices and to improve the quality and safety of care to this vulnerable group...
2017: BMJ Quality Improvement Reports
https://www.readbyqxmd.com/read/28605254/impact-of-immigration-status-on-cancer-outcomes-in-ontario-canada
#14
Matthew C Cheung, Craig C Earle, Hadas D Fischer, Ximena Camacho, Ning Liu, Refik Saskin, Baiju R Shah, Peter C Austin, Simron Singh
BACKGROUND: Prior studies have documented inferior health outcomes in vulnerable populations, including racial minorities and those with disadvantaged socioeconomic status. The impact of immigration on cancer-related outcomes is less clear. METHODS: Administrative databases were linked to create a cohort of incident cancer cases (colorectal, lung, prostate, head and neck, breast, and hematologic malignancies) from 2000 to 2012 in Ontario, Canada. Cancer patients who immigrated to Canada (from 1985 onward) were compared with those who were Canadian born (or immigrated before 1985)...
June 12, 2017: Journal of Oncology Practice
https://www.readbyqxmd.com/read/28605006/treating-periodontal-disease-for-preventing-adverse-birth-outcomes-in-pregnant-women
#15
REVIEW
Zipporah Iheozor-Ejiofor, Philippa Middleton, Marco Esposito, Anne-Marie Glenny
BACKGROUND: Periodontal disease has been linked with a number of conditions, such as cardiovascular disease, stroke, diabetes and adverse pregnancy outcomes, all likely through systemic inflammatory pathways. It is common in women of reproductive age and gum conditions tend to worsen during pregnancy. Some evidence from observational studies suggests that periodontal intervention may reduce adverse pregnancy outcomes. There is need for a comprehensive Cochrane review of randomised trials to assess the effect of periodontal treatment on perinatal and maternal health...
June 12, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28604803/impact-of-tumor-position-conductivity-distribution-and-tissue-homogeneity-on-the-distribution-of-tumor-treating-fields-in-a-human-brain-a-computer-modeling-study
#16
Anders Rosendal Korshoej, Frederik Lundgaard Hansen, Axel Thielscher, Gorm Burckhardt von Oettingen, Jens Christian Hedemann Sørensen
BACKGROUND: Tumor treating fields (TTFields) are increasingly used in the treatment of glioblastoma. TTFields inhibit cancer growth through induction of alternating electrical fields. To optimize TTFields efficacy, it is necessary to understand the factors determining the strength and distribution of TTFields. In this study, we provide simple guiding principles for clinicians to assess the distribution and the local efficacy of TTFields in various clinical scenarios. METHODS: We calculated the TTFields distribution using finite element methods applied to a realistic head model...
2017: PloS One
https://www.readbyqxmd.com/read/28604549/transverse-cervical-artery-perforator-flap-standardized-surgical-technique-and-multiple-reconstructive-opportunity-in-head-and-neck-surgery
#17
Nicola Luca, Maria Josè Santana, Bianca Maria Festa, Fabio Collurà, Stefano Righini
The main purpose of head and neck reconstructive surgery is to provide anatomic restoration of the demolited region and to provide preservation and recovery of function. The anatomical investigations conducted over the years has enabled a detailed knowledge of human body vascularization, giving the opportunity to design and harvest more and more versatile and refined flaps, with increasingly satisfactory results. Even if in the last 2 decades free flaps have been considered a reconstructive criterion standard, they still determine a great physical impact for the patient and require a certain surgical experience...
June 9, 2017: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/28604404/perioperative-care-of-head-and-neck-free-flap-patients
#18
Michael R Kinzinger, Arnaud F Bewley
PURPOSE OF REVIEW: This article reviews the recent literature on the perioperative care of head and neck surgical patients undergoing free tissue transfer. RECENT FINDINGS: As the overall success of head and neck free flaps has plateaued above 95%, recent literature on perioperative flap management has focused on minimizing complications, length of stay, and cost of treatment. Current areas of research include preoperative risk stratification, preoperative and postoperative nutrition, intraoperative fluid management, postoperative level of care, postoperative antibiotic prophylaxis, defining the impact of comorbidities, and developing comprehensive evidence-based perioperative care protocols...
June 9, 2017: Current Opinion in Otolaryngology & Head and Neck Surgery
https://www.readbyqxmd.com/read/28603550/health-system-governance-to-support-scale-up-of-mental-health-care-in-ethiopia-a-qualitative-study
#19
Charlotte Hanlon, Tigist Eshetu, Daniel Alemayehu, Abebaw Fekadu, Maya Semrau, Graham Thornicroft, Fred Kigozi, Debra Leigh Marais, Inge Petersen, Atalay Alem
BACKGROUND: Ethiopia is embarking upon a ground-breaking plan to address the high levels of unmet need for mental health care by scaling up mental health care integrated within primary care. Health system governance is expected to impact critically upon the success or otherwise of this important initiative. The objective of the study was to explore the barriers, facilitators and potential strategies to promote good health system governance in relation to scale-up of mental health care in Ethiopia...
2017: International Journal of Mental Health Systems
https://www.readbyqxmd.com/read/28602751/time-of-elevation-of-head-of-bed-for-patients-receiving-mechanical-ventilation-and-its-related-factors
#20
L Martí-Hereu, A Arreciado Marañón
INTRODUCTION: The semirecumbent position is a widespread recommendation for the prevention of pneumonia associated with mechanical ventilation. AIMS: To identify the time of elevation of head of bed for patients under mechanical ventilation and the factors related to such elevation in an intensive care unit. MATERIALS AND METHODS: An observational, descriptive cross-sectional study. Conducted in an intensive care unit of a tertiary hospital from April to June 2015...
June 8, 2017: Enfermería Intensiva
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