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https://www.readbyqxmd.com/read/28227993/modeling-fiber-like-conductivity-structures-via-the-boundary-element-method-using-thin-wire-approximation-i-construction-of-basis-functions
#1
Sergey N Makarov, Alvaro Pascual-Leone, Aapo Nummenmaa, Sergey N Makarov, Alvaro Pascual-Leone, Aapo Nummenmaa, Aapo Nummenmaa, Sergey N Makarov, Alvaro Pascual-Leone
A set of one-dimensional basis functions is proposed and tested in order to model a thin homogeneous fiber of a higher conductivity within a medium with a lower conductivity. This set allows us to greatly speed up computations while keeping a good accuracy for the total fiber current and the resulting charge distribution averaged over the fiber cross-section.
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227501/feasibility-of-a-chronic-minimally-invasive-endovascular-neural-interface
#2
Nicholas L Opie, Gil S Rind, Sam E John, Stephen M Ronayne, David B Grayden, Anthony N Burkitt, Clive N May, Terence J O'Brien, Thomas J Oxley, Nicholas L Opie, Gil S Rind, Sam E John, Stephen M Ronayne, David B Grayden, Anthony N Burkitt, Clive N May, Terence J O'Brien, Thomas J Oxley, Sam E John, Stephen M Ronayne, David B Grayden, Nicholas L Opie, Anthony N Burkitt, Terence J O'Brien, Clive N May, Thomas J Oxley, Gil S Rind
Development of a neural interface that can be implanted without risky, open brain surgery will increase the safety and viability of chronic neural recording arrays. We have developed a minimally invasive surgical procedure and an endovascular electrode-array that can be delivered to overlie the cortex through blood vessels. Here, we describe feasibility of the endovascular interface through electrode viability, recording potential and safety. Electrochemical impedance spectroscopy demonstrated that electrode impedance was stable over 91 days and low frequency phase could be used to infer electrode incorporation into the vessel wall...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227253/does-the-degree-of-coarctation-of-the-aorta-influence-wall-shear-stress-focal-heterogeneity
#3
John Gounley, Rafeed Chaudhury, Madhurima Vardhan, Michael Driscoll, Girish Pathangey, Kevin Winarta, Justin Ryan, David Frakes, Amanda Randles, John Gounley, Rafeed Chaudhury, Madhurima Vardhan, Michael Driscoll, Girish Pathangey, Kevin Winarta, Justin Ryan, David Frakes, Amanda Randles, Justin Ryan, Rafeed Chaudhury, Girish Pathangey, Amanda Randles, David Frakes, Kevin Winarta, Michael Driscoll, John Gounley, Madhurima Vardhan
The development of atherosclerosis in the aorta is associated with low and oscillatory wall shear stress for normal patients. Moreover, localized differences in wall shear stress heterogeneity have been correlated with the presence of complex plaques in the descending aorta. While it is known that coarctation of the aorta can influence indices of wall shear stress, it is unclear how the degree of narrowing influences resulting patterns. We hypothesized that the degree of coarctation would have a strong influence on focal heterogeneity of wall shear stress...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227233/austinman-and-austinwoman-high-fidelity-anatomical-voxel-models-developed-from-the-vhp-color-images
#4
Jackson W Massey, Ali E Yilmaz, Jackson W Massey, Ali E Yilmaz, Jackson W Massey
The current versions (v2.3) of AustinMan and AustinWoman anatomical voxel models are presented with the methodology used to generate them from the Visible Human Project's color cross-sectional anatomical images. Both models are freely available online and documented in detail to increase their reproducibility. Visualizations of the models are shown to highlight their complexity.
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227231/the-visible-human-project-%C3%A2-from-body-to-bits
#5
Michael J Ackerman, Michael J Ackerman, Michael J Ackerman
In the middle 1990's the U.S. National Library sponsored the acquisition and development of the Visible Human Project(®) data base. This image database contains anatomical cross-sectional images which allow the reconstruction of three dimensional male and female anatomy to an accuracy of less than 1.0 mm. The male anatomy is contained in a 15 gigabyte database, the female in a 39 gigabyte database. This talk will describe why and how this project was accomplished and demonstrate some of the products which the Visible Human dataset has made possible...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226743/adaptive-higuchi-s-dimension-based-retinal-vessel-diameter-measurement
#6
Behzad Aliahmad, Dinesh K Kumar, Behzad Aliahmad, Dinesh K Kumar, Behzad Aliahmad, Dinesh K Kumar
This paper proposes the use of an adaptive model to measure the width of retinal vessels in fundus photographs. It is based on the hypothesis that the Higuchi's dimension of the cross-section is proportional to the vessel diameter. This approach does not require image segmentation and binarization of the vessels and therefore is suitable for machine based measurements. The model is developed using a synthetic image of the vessel of known diameter and added noise. As a first step, the vessel cross-section profiles were manually obtained and analyzed using Higuchi's fractal dimension method...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226294/extruded-dielectric-sample-tubes-of-complex-cross-section-for-epr-signal-enhancement-of-aqueous-samples
#7
Jason W Sidabras, Richard R Mett, James S Hyde
This paper builds on the work of Mett and Hyde (2003) and Sidabras et al. (2005) where multiple flat aqueous sample cells placed perpendicular to electric fields in microwave cavities were used to reduce the RF losses and increase the EPR signal. In this work, we present three novel sample holders for loop-gap resonators (LGRs) and cylindrical cavity geometries. Two sample holders have been commissioned and built by polytetrafluoroethylene (PTFE) extrusion techniques: a 1mm O.D. capillary with a septum down the middle, named DoubleDee, and a 3...
February 14, 2017: Journal of Magnetic Resonance
https://www.readbyqxmd.com/read/28226286/peripheral-nerve-ultrasonography-in-patients-with-transthyretin-amyloidosis
#8
Simon Podnar, Stayko Sarafov, Ivailo Tournev, Gregor Omejec, Janez Zidar
OBJECTIVE: To systematically study peripheral nerve morphology in patients with transthyretin (TTR) amyloidosis and TTR gene mutation carriers using high-resolution ultrasonography (US). METHODS: In this prospective cross-sectional study we took a structured history, performed neurological examination, and measured peripheral nerve cross-sectional areas (CSAs) bilaterally at 28 standard locations using US. Demographic and US findings were compared to controls. RESULTS: Peripheral nerve CSAs were significantly larger in 33 patients with familial amyloid polyneuropathy (FAP) compared to 50 controls, most dramatically at the common entrapment sites (median nerve at the wrist, ulnar nerve at the elbow), and in the proximal nerve segments (median nerve in the upper arm, sciatic nerve in the thigh)...
January 29, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28226180/a33-shows-similar-sensitivity-to-but-is-more-specific-than-cdx2-as-an-immunomarker-of-colorectal-carcinoma
#9
Newton A C S Wong, Lukasz A Adamczyk, Shanna Evans, Jayne Cullen, Anca Oniscu, Karin A Oien
AIMS: CDX2 is widely used as a sensitive and specific immunomarker for colorectal carcinoma (CRC) but neither this sensitivity nor specificity is absolute. This study is the first known comparison of CDX1 and A33 against CDX2 as immunomarkers for CRC. METHODS AND RESULTS: As a pilot study, whole sections of 51 cases of liver metastatic carcinoma of different origins - colorectum (n=32), breast (n=3), oesophagogastric tract (n=4), lung (n=3), pancreas (n=8), and prostate (n=1) - were immunostained with CDX1, CDX2 and A33...
February 22, 2017: Histopathology
https://www.readbyqxmd.com/read/28226066/chlamydia-trachomatis-infection-in-young-pregnant-women-in-southern-brazil-a-cross-sectional-study
#10
Mariângela Freitas da Silveira, Iândora Krolow Timm Sclowitz, Ludmila Gonçalves Entiauspe, Marilia Arndt Mesenburg, Dulce Stauffert, Guilherme Lucas de Oliveira Bicca, Carine Pieniz, Adriane Brod Manta
This study estimated the prevalence of Chlamydia trachomatis infection during pregnancy in a sample of women up to 29 years of age in the city of Pelotas, Rio Grande do Sul State, Brazil, and investigated socio-demographic risk factors such as maternal age, marital status, maternal schooling, and family income. C. trachomatis infection was diagnosed with PCR using BD ProbeTecTM CT/GC Amplified DNA Assay. Socio-demographic, behavioral, and reproductive data were collected using structured questionnaires. All collections were performed by previously trained medical students...
February 13, 2017: Cadernos de Saúde Pública
https://www.readbyqxmd.com/read/28226055/functional-health-literacy-and-knowledge-of-renal-patients-on-pre-dialytic-treatment
#11
Katarinne Lima Moraes, Virginia Visconde Brasil, Gabriela Ferreira de Oliveira, Jacqueline Andréia Bernardes Leão Cordeiro, Antonio Márcio Teodoro Cordeiro Silva, Rafaela Peres Boaventura, Denize Bouttelet Munari, Mônica Ribeiro Canhestro
Objective: to analyze the functional health literacy (FHL), i.e., understanding and knowledge about chronic renal disease of 60 patients in pre-dialytic treatment. Method: this is a cross-sectional study. FHL was measured by B-TOFHLA; and the knowledge, by questionnaire. Pearson correlation and Chi-square tests were carried out as well as linear regression models. Results: all respondents presented inadequate FHL, and most showed insufficient knowledge about the disease and treatment...
January 2017: Revista Brasileira de Enfermagem
https://www.readbyqxmd.com/read/28226052/factors-associated-with-occupational-exposure-to-biological-material-among-nursing-professionals
#12
Nádia Bruna da Silva Negrinho, Silmara Elaine Malaguti-Toffano, Renata Karina Reis, Fernanda Maria Vieira Pereira, Elucir Gir
Objective: to identify factors associated with occupational exposure to biological material among nursing professionals. Method: a cross-sectional study was conducted in a high complexity hospital of a city in the state of São Paulo, Brazil. Nursing professionals were interviewed from March to November 2015. All ethical aspects were observed. Result: among the 226 professionals interviewed, 17.3% suffered occupational exposure to potentially contaminated biological material, with 61...
January 2017: Revista Brasileira de Enfermagem
https://www.readbyqxmd.com/read/28226049/predictors-for-the-functional-incapacity-of-the-elderly-in-primary-health-care
#13
Lívia Carvalho Pereira, Maria do Livramento Fortes Figueiredo, Cinara Maria Feitosa Beleza, Elaine Maria Leite Rangel Andrade, Maria Josefina da Silva, Antonio Francisco Machado Pereira
Objectives: to assess the predictors for the functional incapacity of the elderly in primary health care. Method: cross-sectional study, of which 388 older people participated, conducted in three Primary health care Units, using the Katz index and Lawton's scale. The research project was approved by the Research Ethics Committee. Results: regarding the degree of dependency for Basic Activities, 90.2% were less independent for dressing themselves; and for Instrumental Activities, 77...
January 2017: Revista Brasileira de Enfermagem
https://www.readbyqxmd.com/read/28226048/fetal-and-neonatal-deaths-of-children-of-patients-classified-as-near-miss
#14
Daniele Marin Nardello, Alzira Maria D Avila Nery Guimarães, Ikaro Daniel de Carvalho Barreto, Ricardo Queiroz Gurgel, Eleonora Ramos de Oliveira Ribeiro, Cristiane Franca Lisboa Gois
Objective: identify the epidemiological aspects of early fetal and neonatal deaths in children of patients classified with near miss and the factors associated with this outcome. Method: a cross-sectional study of 79 women identified with near miss and their newborns. The variables were analyzed using Fisher's exact test. Risk factors were estimated based on unadjusted and adjusted odds ratios, and by means of multiple correspondence analysis, with significance for p <0...
January 2017: Revista Brasileira de Enfermagem
https://www.readbyqxmd.com/read/28226047/adherence-to-standard-precautions-in-a-teaching-hospital
#15
Lúcia Aparecida Ferreira, Camila de Assunção Peixoto, Luciana Paiva, Quenia Cristina Gonçalves da Silva, Marina Pereira Rezende, Maria Helena Barbosa
Objective: analyze related factors and the level of adherence to standard precautions of nursing professionals from the clinical medical division of a teaching hospital. Method: a quantitative, cross-sectional, analytical study was conducted with 54 nursing professionals using the Psychometric Scale of Adherence to Standard Precautions, translated and validated to Brazilian Portuguese. Results: the global score of adherence was intermediate (4...
January 2017: Revista Brasileira de Enfermagem
https://www.readbyqxmd.com/read/28226045/nursing-practice-environment-and-work-satisfaction-in-critical-units
#16
Elaine Machado de Oliveira, Ricardo Luis Barbosa, Rafaela Andolhe, Flavia Regina Cocuzza das Eiras, Katia Grillo Padilha
Objective: to analyze the association between the environment of nursing practices and work satisfaction in Intensive Care Units (ICU). Method: a cross-sectional study was performed in eight adult ICUs of a public university hospital between 2012 and 2015. The Nursing Work Index-Revised (NWI-R), in their short forms, and the Index of Work Satisfaction (IWS) were applied to investigate the environment of nursing practices and work satisfaction, respectively. Results: a total of 100 (34...
January 2017: Revista Brasileira de Enfermagem
https://www.readbyqxmd.com/read/28226037/excess-fluid-volume-sociodemographic-and-clinical-analysis-in-haemodialysis-patients
#17
Maria Isabel da Conceição Dias Fernandes, Camila de Souza Soares, Jéssica Dantas de Sá Tinôco, Millena Freire Delgado, Maria das Graças Mariano Nunes de Paiva, Marcos Venícios de Oliveira Lopes, Ana Luisa Brandão de Carvalho Lira
Objective: To analyse the defining characteristics and related factors in the nursing diagnosis Excess fluid volume and its relationship to sociodemographic and clinical variables in haemodialysis patients. Method: Cross-sectional study, conducted using a form and physical examination, with a sample of 100 patients, between December 2012 and April 2013 at a university hospital and a dialysis clinic. Results: It was found 10 significant statistical associations between the defining characteristics/ related factors of Excess fluid volume and the sociodemographic and clinical variables...
January 2017: Revista Brasileira de Enfermagem
https://www.readbyqxmd.com/read/28226027/serum-25-hydroxyvitamin-d-levels-are-associated-with-functional-capacity-but-not-with-postural-balance-in-osteoporotic-postmenopausal-women
#18
Guilherme Carlos Brech, Emmanuel Gomes Ciolac, Mark D Peterson, Júlia Maria D'Andréa Greve
OBJECTIVES: In post-menopausal women with osteoporosis, insufficient vitamin D levels decrease calcium fixation in the bones and calcium transport in the sarcoplasmic reticulum, which impairs muscle strength, possibly leading to detrimental consequences for the preservation of functional capacity and postural balance, fall prevention, and fracture risk. The aim of this study was to evaluate the association between vitamin D levels and knee muscle strength, postural balance and functional mobility among postmenopausal women with osteoporosis...
January 1, 2017: Clinics
https://www.readbyqxmd.com/read/28226026/diabetes-mellitus-and-sensorineural-hearing-loss-is-there-an-association-baseline-of-the-brazilian-longitudinal-study-of-adult-health-elsa-brasil
#19
Alessandra G Samelli, Itamar S Santos, Renata R Moreira, Camila M Rabelo, Laurie P Rolim, Isabela J Bensenõr, Paulo A Lotufo
OBJECTIVES: Although several studies have investigated the effects of diabetes on hearing loss, the relationship between these two conditions remains unclear. Some studies have suggested that diabetes may cause sensorineural hearing loss, whereas others have failed to find an association. The biggest challenge in investigating the association between diabetes and hearing loss is the presence of confounding variables and the complexity of the auditory system. Our study investigated the association between diabetes and sensorineural hearing loss...
January 1, 2017: Clinics
https://www.readbyqxmd.com/read/28226019/hospitalizations-of-brazilian-children-under-fiver-years-old-a-systematic-review
#20
Dixis Figueroa Pedraza, Erika Morganna Neves de Araujo
Objective: to describe the causes of hospitalization of Brazilian children under five years old. Methods: this is a systematic review of articles published from 2008 to 2015, searched in the databases Medline and LILACS; selected studies were critically analyzed through a validated instrument. Results: eleven articles were included, four of them are ecological and seven are cross-sectional studies; respiratory diseases (n=5), parasitic infections (n=4) and perinatal diseases (n=2) were the main causes for hospitalizations in the reviwed articles; in the studies that analyzed the sensitive conditions, pneumonia (n=6), gastroenteritis (n=5), and asthma (n=5) were the mais causes pointed out...
January 2017: Epidemiologia e Servicos de Saude: Revista do Sistema Unico de Saude do Brasil
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