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https://www.readbyqxmd.com/read/28538996/the-relationship-between-surface-curvature-and-abdominal-aortic-aneurysm-wall-stress
#1
Sergio Ruiz de Galarreta, Aitor Cazon, Raúl Antón, Ender A Finol
The maximum diameter criterion is the most important factor when predicting risk of rupture of abdominal aortic aneurysms (AAA). An elevated wall stress has also been linked to a high risk of aneurysm rupture, yet is an uncommon clinical practice to compute AAA wall stress. The purpose of this study is to assess whether other characteristics of the AAA geometry are statistically correlated with wall stress. Using in-house segmentation and meshing algorithms, thirty patient-specific AAA models were generated for finite element analysis...
May 24, 2017: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/28538023/magnetic-resonance-imaging-based-assessment-of-breast-cancer-related-lymphoedema-tissue-composition
#2
Marco Borri, Kristiana D Gordon, Julie C Hughes, Erica D Scurr, Dow-Mu Koh, Martin O Leach, Peter S Mortimer, Maria A Schmidt
OBJECTIVES: The aim of this study was to propose a magnetic resonance imaging acquisition and analysis protocol that uses image segmentation to measure and depict fluid, fat, and muscle volumes in breast cancer-related lymphoedema (BCRL). This study also aims to compare affected and control (unaffected) arms of patients with diagnosed BCRL, providing an analysis of both the volume and the distribution of the different tissue components. MATERIALS AND METHODS: The entire arm was imaged with a fluid-sensitive STIR and a 2-point 3-dimensional T1W gradient-echo-based Dixon sequences, acquired in sagittal orientation and covering the same imaging volume...
May 19, 2017: Investigative Radiology
https://www.readbyqxmd.com/read/28537977/perioperative-use-of-focused-transthoracic-cardiac-ultrasound-a-survey-of-current-practice-and-opinion
#3
Frederick Conlin, Neil R Connelly, Michael P Eaton, Patrick J Broderick, Jennifer Friderici, Adam C Adler
BACKGROUND: The advent of portable ultrasound machines in recent years has led to greater availability of focused cardiac ultrasound (FoCUS) in the perioperative and critical care setting. To our knowledge, its use in the perioperative setting among anesthesiologists remains undefined. We sought to assess the use of FoCUS by members of the Society of Cardiovascular Anesthesiologists (SCA) in clinical practice, to identify variations in its application, to outline limits to its use, and to understand the level of training of physicians using this technology...
May 19, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28537691/the-influence-of-previous-robotic-experience-in-the-initial-learning-curve-of-laparoscopic-radical-prostatectomy
#4
José Anastácio Dias, Marcos F Dall'oglio, João Roberto Colombo, Rafael F Coelho, William Carlos Nahas
INTRODUCTION: This study analyzed the impact of the experience with Robotic-Assisted Laparoscopic Prostatectomy (RALP) on the initial experience with Laparoscopic Radical Prostatectomy (LRP) by examining perioperative results and early outcomes of 110 patients. LRPs were performed by two ro-botic fellowship trained surgeons with daily practice in RALP. PATIENTS AND METHODS: 110 LRP were performed to treat aleatory selected patients. The patients were divided into 4 groups for prospective analyses...
May 23, 2017: International Braz J Urol: Official Journal of the Brazilian Society of Urology
https://www.readbyqxmd.com/read/28534810/non-invasive-fetal-monitoring-a-maternal-surface-ecg-electrode-placement-based-novel-approach-for-optimization-of-adaptive-filter-control-parameters-using-the-lms-and-rls-algorithms
#5
Radek Martinek, Radana Kahankova, Homer Nazeran, Jaromir Konecny, Janusz Jezewski, Petr Janku, Petr Bilik, Jan Zidek, Jan Nedoma, Marcel Fajkus
This paper is focused on the design, implementation and verification of a novel method for the optimization of the control parameters (such as step size μ and filter order N) of LMS and RLS adaptive filters used for noninvasive fetal monitoring. The optimization algorithm is driven by considering the ECG electrode positions on the maternal body surface in improving the performance of these adaptive filters. The main criterion for optimal parameter selection was the Signal-to-Noise Ratio (SNR). We conducted experiments using signals supplied by the latest version of our LabVIEW-Based Multi-Channel Non-Invasive Abdominal Maternal-Fetal Electrocardiogram Signal Generator, which provides the flexibility and capability of modeling the principal distribution of maternal/fetal ECGs in the human body...
May 19, 2017: Sensors
https://www.readbyqxmd.com/read/28534393/simple-approach-to-high-performance-stretchable-heaters-based-on-kirigami-patterning-of-conductive-paper-for-wearable-thermotherapy-applications
#6
Nam-Su Jang, Kang-Hyun Kim, Sung-Hun Ha, Soo-Ho Jung, Hye Moon Lee, Jong-Man Kim
Recent efforts to develop stretchable resistive heaters open up the possibility for their use in wearable thermotherapy applications. Such heaters should have high electrothermal performance and stability to be used practically, and the fabrication must be simple, economic, reproducible, and scalable. Here we present a simple yet highly efficient way of producing high-performance stretchable heaters, which is based on a facile kirigami pattering (the art of cutting and folding paper) of a highly conductive paper for practical wearable thermotherapy...
May 23, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28534233/is-the-ao-guideline-for-postoperative-treatment-of-tibial-plateau-fractures-still-decisive-a-survey-among-orthopaedic-surgeons-and-trauma-surgeons-in-the-netherlands
#7
M van der Vusse, P H S Kalmet, C H G Bastiaenen, Y Y van Horn, P R G Brink, H A M Seelen
INTRODUCTION: The standard aftercare treatment (according to the AO guideline) for surgically treated trauma patients with fractures of the tibial plateau is non-weight bearing or partial weight bearing for 10-12 weeks. The purpose of this study was to investigate the current state of practice among orthopaedic surgeons and trauma surgeons in choosing the criteria and the time period of restricted weight bearing after surgically treated tibial plateau fractures. MATERIALS AND METHODS: A web-based survey was distributed among members of the Dutch Trauma Society and Dutch Orthopaedic Society to identify the most commonly applied protocols in terms of the post-operative initiation and level of weight bearing in patients with tibial plateau fractures...
May 22, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28534169/-capacity-to-consent-to-treatment-in-dementia-patients-interdisciplinary-perspectives
#8
REVIEW
Julia Haberstroh, Tanja Müller
BACKGROUND: Currently, there are no concrete, evidence-based default procedures to adequately assess the capacity to consent to medical treatment. This explains why different raters use individual heuristics, differing both within and between disciplines. The lack of a procedure that is standardized, validated, and equally accepted across disciplines to assess the capacity to consent to treatment has led to an uncertainty in legal and medical practice regarding appropriate action and decision making...
May 22, 2017: Zeitschrift Für Gerontologie und Geriatrie
https://www.readbyqxmd.com/read/28533795/a-kasp-genotyping-method-to-identify-northern-watermilfoil-eurasian-watermilfoil-and-their-interspecific-hybrids
#9
Eric L Patterson, Margaret B Fleming, Kallie C Kessler, Scott J Nissen, Todd A Gaines
The invasive aquatic plant Eurasian watermilfoil (Myriophyllum spicatum L.) can hybridize with the related North American native species northern watermilfoil (M. sibiricum Kom.). Hybrid watermilfoil (M. spicatum × M. sibiricum) populations have higher fitness and reduced sensitivity to some commonly used aquatic herbicides, making management more difficult. There is growing concern that management practices using herbicides in lakes with mixed populations of watermilfoil species may further select for hybrid individuals due to the difference in herbicide sensitivity...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28533476/neutrophil-lymphocyte-ratio-is-a-prognostic-marker-in-patients-with-locally-advanced-stage-iiia-and-iiib-non-small-cell-lung-cancer-treated-with-combined-modality-therapy
#10
Katherine A Scilla, Søren M Bentzen, Vincent K Lam, Pranshu Mohindra, Elizabeth M Nichols, Melissa A Vyfhuis, Neha Bhooshan, Steven J Feigenberg, Martin J Edelman, Josephine L Feliciano
BACKGROUND: Neutrophil-lymphocyte ratio (NLR) is a measure of systemic inflammation that appears prognostic in localized and advanced non-small cell lung cancer (NSCLC). Increased systemic inflammation portends a poorer prognosis in cancer patients. We hypothesized that low NLR at diagnosis is associated with improved overall survival (OS) in locally advanced NSCLC (LANSCLC) patients. PATIENTS AND METHODS: Records from 276 patients with stage IIIA and IIIB NSCLC treated with definitive chemoradiation with or without surgery between 2000 and 2010 with adequate data were retrospectively reviewed...
May 22, 2017: Oncologist
https://www.readbyqxmd.com/read/28532693/a-prospective-national-survey-of-coronary-ct-angiography-radiation-doses-in-the-united-kingdom
#11
Isabel A Castellano, Edward D Nicol, Russell K Bull, Carl A Roobottom, Michelle C Williams, Stephen P Harden
BACKGROUND: Little real-world radiation dose data exist for the majority of cardiovascular CT. Some data have been published for coronary CT angiography (coronary CTA) specifically, but they invariably arise from high-volume centres with access to the most recent technology. OBJECTIVE: The aim of this study was to document real-world radiation doses for coronary CTA in the United Kingdom, and to establish their relationship to clinical protocol selection, acquisition heart rate, and scanner technology...
May 8, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28532541/-analysis-of-growth-curve-type-in-pulmonary-nodules-with%C3%A2-different-characteristics
#12
Xinyue Wang, Rongcheng Han, Fangfang Guo, Xinling Li, Wensong Zheng, Qing Wang, Wenjing Song, Tielian Yu, Ying Wang
BACKGROUND: Background and objective Follow up by computed tomography (CT) and growth evaluation are routine methods for the differential diagnosis of indeterminate pulmonary nodules in clinical practice. Pulmonary nodules with diverse biological behaviors may show different growth patterns and velocities. The aim of this study is to identify the volume growth curve of both benign and malignant pulmonary nodules. This work also intends to determine these nodules' growth patterns and provide evidence for the establishment of a follow-up strategy...
May 20, 2017: Zhongguo Fei Ai za Zhi, Chinese Journal of Lung Cancer
https://www.readbyqxmd.com/read/28531261/age-of-acquiring-causal-human-papillomavirus-hpv-infections-leveraging-simulation-models-to-explore-the-natural-history-of-hpv-induced-cervical-cancer
#13
Emily A Burger, Jane J Kim, Stephen Sy, Philip E Castle
Background.: Although new human papillomavirus (HPV) infections can occur at all ages, the age at which women acquire their "causal" HPV infection that develops into cervical cancer is poorly understood and practically unobservable. We aimed to estimate the age distribution at which individuals acquired their causal HPV infection in the absence of HPV vaccination or screening to help guide the optimal use of both. Methods.: Using an empirically calibrated mathematical model that simulates the natural history of cervical cancer, we estimated the cumulative number of causal HPV infections by age, stratified by HPV genotype (HPV16 vs...
May 20, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28531094/cost-effectiveness-of-a-community-exercise-and-nutrition-program-for-older-adults-texercise-select
#14
Olufolake Odufuwa Akanni, Matthew Lee Smith, Marcia G Ory
The wide-spread dissemination of evidence-based programs that can improve health outcomes among older populations often requires an understanding of factors influencing community adoption of such programs. One such program is Texercise Select, a community-based health promotion program previously shown to improve functional health, physical activity, nutritional habits and quality of the life among older adults. This paper assesses the cost-effectiveness of Texercise Select in the context of supportive environments to facilitate its delivery and statewide sustainability...
May 20, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28530213/-the-model-of-perioperative-risk-assessment-in-elderly-patients-interim-analysis
#15
Izabela Grabowska, Lucyna Ścisło, Szymon Pietruszka, Elzbieta Walewska, Agata Paszko, Benita Siarkiewicz, Piotr Richter, Andrzej Budzyński, Antoni M Szczepanik
Demographic changes in contemporary society require implementation of proper perioperative care of elderly patients due to an increased risk of perioperative complications in this group. Preoperative assessment of health status identifies risks and enables preventive interventions, improving outcomes of surgical treatment. The Comprehensive Geriatric Assessment contains numerous diagnostic tests and consultations, which is expensive and difficult to use in everyday practice. The development of a simplified model of perioperative assessment of elderly patients will help identifying the group of patients who require further diagnostic workup...
April 21, 2017: Polski Merkuriusz Lekarski: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/28528194/analysis-of-peg-oligomers-in-black-gel-inks-discrimination-and-ink-dating
#16
Qiran Sun, Yiwen Luo, Ping Xiang, Xu Yang, Min Shen
Carbon-based black gel inks are common samples in forensic practice of questioned document examination in China, but there are few analytical methods for this type of ink. In this study, a liquid chromatography-.high resolution mass spectrometry (LC-HRMS) method was established for the analysis of PEG oligomers in carbon-based black gel ink entries. The coupled instruments achieve both the identification and quantification of PEG oligomers in ink entries with reproducible results. Twenty carbon-based black gel inks, whose Raman spectra appeared identical, were analyzed using the LC-HRMS method...
May 4, 2017: Forensic Science International
https://www.readbyqxmd.com/read/28527750/estimating-serum-concentrations-of-dioxin-like-compounds-in-the-u-s-population-effective-2005-2006-and-2007-2008-a-multiple-imputation-and-trending-approach-incorporating-nhanes-pooled-sample-data
#17
Anne Bichteler, Daniele S Wikoff, Francis Loko, Mark A Harris
Dioxin-like compounds (DLCs) are monitored in the U.S. population using data collected with the National Health and Nutrition Examination Survey (NHANES). Until recently, participants' serum samples have been analyzed individually, and summary statistics defining reference ranges by age, gender, and race/ethnicity have served as the background by which other biomonitoring data can be evaluated. In the most recent NHANES DLC data, 2005-2006 and 2007-2008, participants' sera have been physically pooled prior to laboratory analysis, introducing major challenges to their utility as a reference population: variability among individuals and relations with covariates are lost, and individual design effects cannot be applied...
May 18, 2017: Environment International
https://www.readbyqxmd.com/read/28527505/data-sharing-and-data-registries-in-physical-medicine-and-rehabilitation
#18
REVIEW
Carmen E Capó-Lugo, Abel N Kho, Linda C O'Dwyer, Marc B Rosenman
The field of physical medicine & rehabilitation (PM&R), along with all the disciplines it encompasses, has evolved rapidly in the past 50 years. The number of controlled trials, systematic reviews, and meta-analyses in PM&R increased 5-fold from 1998 to 2013. In recent years, professional, private, and governmental institutions have identified the need to track function and functional status across providers and settings of care and on a larger scale. Because function and functional status are key aspects of PM&R, access to and sharing of reliable data will have an important impact on clinical practice...
May 2017: PM & R: the Journal of Injury, Function, and Rehabilitation
https://www.readbyqxmd.com/read/28527448/estimating-thermodynamic-expectations-and-free-energies-in-expanded-ensemble-simulations-systematic-variance-reduction-through-conditioning
#19
Manuel Athènes, Pierre Terrier
Markov chain Monte Carlo methods are primarily used for sampling from a given probability distribution and estimating multi-dimensional integrals based on the information contained in the generated samples. Whenever it is possible, more accurate estimates are obtained by combining Monte Carlo integration and integration by numerical quadrature along particular coordinates. We show that this variance reduction technique, referred to as conditioning in probability theory, can be advantageously implemented in expanded ensemble simulations...
May 21, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28526020/salmonella-serotypes-and-their-antimicrobial-susceptibility-in-apparently-healthy-dogs-in-addis-ababa-ethiopia
#20
Bitsu Kiflu, Haile Alemayehu, Mukarim Abdurahaman, Yohannes Negash, Tadesse Eguale
BACKGROUND: The close bond between pet animals and family members poses risk of infection with zoonotic bacterial pathogens such as Salmonella. No data is available on occurrence of Salmonella in dogs in Ethiopia. The aim of this study was therefore to determine the prevalence, serotype distribution and antimicrobial resistance of Salmonella from feces of apparently healthy dogs in Addis Ababa, Ethiopia. RESULTS: Of the total 360 dogs examined, 42 (11.7%; 95% Confidence limit of 8...
May 19, 2017: BMC Veterinary Research
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