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Search Results: 1 - 10 of 64142 matches for " Belisa Barreto Gomes da;Siqueira "
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GuaragnaSCORE satisfactorily predicts outcomes in heart valve surgery in a Brazilian hospital
, Michel Pompeu Barros de Oliveira;Sá, Marcus Villander Barros de Oliveira;Albuquerque, Ana Carla Lopes de;Silva, Belisa Barreto Gomes da;Siqueira, José Williams Muniz de;Brito, Phabllo Rodrigo Santos de;Vasconcelos, Frederico Pires;Lima, Ricardo de Carvalho;
Revista Brasileira de Cirurgia Cardiovascular , 2012, DOI: 10.5935/1678-9741.20120003
Abstract: objective: the aim of this study is to evaluate the applicability of guaragnascore for predicting mortality in patients undergoing heart valve surgery in the division of cardiovascular surgery of pronto socorro cardiológico de pernambuco - procape, recife, pe, brazil. methods: retrospective study involving 491 consecutive patients operated between may/2007 and december/2010. the registers contained all the information used to calculate the score. the outcome of interest was death. association of model factors with death (univariate analysis and multivariate logistic regression analysis), association of risk score classes with death and accuracy of the model by the area under the roc (receiver operating characteristic) curve were calculated. results: the incidence of death was 15.1%. the nine variables of the score were predictive of perioperative death in both univariate and multivariate analysis. we observed that the higher the risk class of the patient (low, medium, high, very high, extremely high), the greater is the incidence of postoperative af (0%; 7.2%; 25.5%; 38.5%; 52.4%), showing that the model seems to be a good predictor of risk of postoperative death, in a statistically significant association (p <0.001). the score presented a good accuracy, since the discrimination power of the model in this study according to the roc curve was 78.1%. conclusions: the brazilian score proved to be a simple and objective index, revealing a satisfactory predictor of perioperative mortality in patients undergoing heart valve surgery at our institution.
Predicting risk of atrial fibrillation after heart valve surgery: evaluation of a Brazilian risk score
, Michel Pompeu Barros de Oliveira;Sá, Marcus Villander Barros de Oliveira;Albuquerque, Ana Carla Lopes de;Silva, Belisa Barreto Gomes da;Siqueira, José Williams Muniz de;Brito, Phabllo Rodrigo Santos de;Ferraz, Paulo Ernando;Lima, Ricardo de Carvalho;
Revista Brasileira de Cirurgia Cardiovascular , 2012, DOI: 10.5935/1678-9741.20120017
Abstract: objective: the aim of this study is to evaluate the applicability of a brazilian score for predicting atrial fibrillation (af) in patients undergoing heart valve surgery in the division of cardiovascular surgery of pronto socorro cardiológico de pernambuco - procape (recife, pe, brazil). methods: retrospective study involving 491 consecutive patients operated between may/2007 and december/2010. the registers contained all the information used to calculate the score. the outcome of interest was af. we calculated association of model factors with af (univariate analysis and multivariate logistic regression analysis), and association of risk score classes with af. results: the incidence of af was 31.2%. in multivariate analysis, the four variables of the score were predictors of postoperative af: age >70 years (or 6.82; 95%ci 3.34-14.10; p<0.001), mitral valve disease (or 3.18; 95%ci 1.83-5.20; p<0.001), no use of beta-blocker or discontinuation of its use in the postoperative period (or 1.63; 95%ci 1.05-2.51; p=0.028), total fluid balance > 1500 ml at first 24 hours (or 1.92; 95%ci 1.28-2.88; p=0.002). we observed that the higher the risk class of the patient (low, medium, high, very high), the greater is the incidence of postoperative af (4.2%; 18.1%; 30.8%; 49.2%), showing that the model seems to be a good predictor of risk of postoperative af, in a statistically significant association (p<0.001). conclusions: the brazilian score proved to be a simple and objective index, revealing a satisfactory predictor of development of postoperative af in patients undergoing heart valve surgery at our institution.
Risk Factors and Characterization of Plasmodium Vivax-Associated Admissions to Pediatric Intensive Care Units in the Brazilian Amazon
Ellen Fátima Caetano Lan?a, Belisa Maria Lopes Magalh?es, Sheila Vitor-Silva, André Machado Siqueira, Silvana Gomes Benzecry, Márcia Almeida Araújo Alexandre, Connor O'Brien, Quique Bassat, Marcus Vinícius Guimar?es Lacerda
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0035406
Abstract: Background Plasmodium vivax is responsible for a significant proportion of malaria cases worldwide and is increasingly reported as a cause of severe disease. The objective of this study was to characterize severe vivax disease among children hospitalized in intensive care units (ICUs) in the Western Brazilian Amazon, and to identify risk factors associated with disease severity. Methods and Findings In this retrospective study, clinical records of 34 children, 0–14 years of age hospitalized in the 11 public pediatric and neonatal ICUs of the Manaus area, were reviewed. P. falciparum monoinfection or P. falciparum/P. vivax mixed infection was diagnosed by microscopy in 10 cases, while P. vivax monoinfection was confirmed in the remaining 24 cases. Two of the 24 patients with P. vivax monoinfection died. Respiratory distress, shock and severe anemia were the most frequent complications associated with P. vivax infection. Ninety-one children hospitalized with P. vivax monoinfections but not requiring ICU were consecutively recruited in a tertiary care hospital for infectious diseases to serve as a reference population (comparators). Male sex (p = 0.039), age less than five years (p = 0.028), parasitemia greater than 500/mm3 (p = 0.018), and the presence of any acute (p = 0.023) or chronic (p = 0.017) co-morbidity were independently associated with ICU admission. At least one of the WHO severity criteria for malaria (formerly validated for P. falciparum) was present in 23/24 (95.8%) of the patients admitted to the ICU and in 17/91 (18.7%) of controls, making these criteria a good predictor of ICU admission (p = 0.001). The only investigated criterion not associated with ICU admission was hyperbilirubinemia (p = 0.513)]. Conclusions Our study points to the importance of P. vivax-associated severe disease in children, causing 72.5% of the malaria admissions to pediatric ICUs. WHO severity criteria demonstrated good sensitivity in predicting severe P. vivax infection in this small case series.
Rheumatoid factor and tobacco exposure
Skare Thelma Larocca,Silva Marilia Barreto Gameiro,Silva M?nica Gomes da,Gomes Fábio
Brazilian Archives of Biology and Technology , 2002,
Abstract: This study was carried out to analyse the possible influence of smoking on the positivity of rheumatoid factor (RF) in healthy individuals in the region of Curitiba, Brazil. One hundred fifty blood donors (84 smokers and 66 non-smokers ) were studied for the presence of RF using nephelometry. Smoking was found not to be correlated to the positivity of RF, independently of the smokers sex (men with p=0.09 and women with p=0.49), the number of cigarettes/day (p=0.20), duration of smoking (p=0.18) and cumulative exposure (time X quantity) to cigarettes (p=0.13).
Soil Analysis as a Pedagogical Strategy in High School with PBL Methodology  [PDF]
Cristiane Heredia Gomes, Natália Borges Pinheiro, Isabel Cristina Teixeira da Silva, Vanessa Fagundes Siqueira, Cássius Fernandes Mirapalhete, Rafael Lima Dessart
Creative Education (CE) , 2018, DOI: 10.4236/ce.2018.96068
Abstract: This study aims at discussing the implementation of Problem Based Learning (PBL) in activities carried out in a first grade high school class. The analysis of soil was used as a didactic tool capable of facilitating student teaching and learning, and as a way for understanding the environment that surrounds them, aiming at achieving three main goals: to acquire knowledge, to develop skills, and attitudes. During the activities,?it was noticed a great student involvement with the activities, especially in the practical ones. In that sense, it was concluded that it is important to work with active methodologies, which are able to increase interest and motivation in the students. Thus, through a thematic approach,?it is possible to raise students’ critical awareness.
Classification of Segments in PolSAR Imagery by Minimum Stochastic Distances Between Wishart Distributions
Wagner Barreto da Silva,Corina da Costa Freitas,Sidnei Jo?o Siqueira Sant'Anna,Alejandro C. Frery
Computer Science , 2013,
Abstract: A new classifier for Polarimetric SAR (PolSAR) images is proposed and assessed in this paper. Its input consists of segments, and each one is assigned the class which minimizes a stochastic distance. Assuming the complex Wishart model, several stochastic distances are obtained from the h-phi family of divergences, and they are employed to derive hypothesis test statistics that are also used in the classification process. This article also presents, as a novelty, analytic expressions for the test statistics based on the following stochastic distances between complex Wishart models: Kullback-Leibler, Bhattacharyya, Hellinger, R\'enyi, and Chi-Square; also, the test statistic based on the Bhattacharyya distance between multivariate Gaussian distributions is presented. The classifier performance is evaluated using simulated and real PolSAR data. The simulated data are based on the complex Wishart model, aiming at the analysis of the proposal well controlled data. The real data refer to the complex L-band image, acquired during the 1994 SIR-C mission. The results of the proposed classifier are compared with those obtained by a Wishart per-pixel/contextual classifier, and we show the better performance of the region-based classification. The influence of the statistical modeling is assessed by comparing the results using the Bhattacharyya distance between multivariate Gaussian distributions for amplitude data. The results with simulated data indicate that the proposed classification method has a very good performance when the data follow the Wishart model. The proposed classifier also performs better than the per-pixel/contextual classifier and the Bhattacharyya Gaussian distance using SIR-C PolSAR data.
Importancia do co-cultivo com fibroblastos de camundongo 3T3 para estabelecer cultura de suspens?o de células epiteliais do limbo humano
Cristovam, Priscila Cardoso;Glória, Maria Aparecida da;Melo, Gustavo Barreto;Gomes, José álvaro Pereira;
Arquivos Brasileiros de Oftalmologia , 2008, DOI: 10.1590/S0004-27492008000500015
Abstract: purpose: to evaluate the importance of the presence of 3t3 fibroblasts for establishing limbal epithelial cultures from cell suspension obtained from corneo-scleral rims (csr). methods: corneo-scleral rims from different donors (n=6) had their posterior stroma and endothelium stripped away. each corneo-scleral rim was divided into three equal segments that were set up in tissue culture in three different conditions: one of the segments was placed with the epithelial side up on the bottom of a 6-well culture plate (group a). the other two fragments were trypsinized and the obtained cell suspension was cultured with (group b) or without (group c) irradiaded 3t3 cells. the cells were cultured in supplemental hormonal epithelial medium (shem), the epithelial migration and clone formation in groups a, b and c were evaluated with phase contrast microscopy and rodamine b staining. results: epithelial cell growth was observed in 4/6 rims (group a). all epithelial cell suspensions that were cultured with 3t3 cells (group b) formed clones. no adhesion or true clone formation (holo- or meroclones) was observed in the cell suspensions that were cultivated without 3t3 (group c) (p=0.009). conclusions: epithelial cell suspension obtained from corneo-scleral rims in this model needs to be cultivated with 3t3 cells in order to form clones and establish limbal epithelial cell colonies with the potential to be used for ocular surface reconstruction.
Valida??o e estimativa da incerteza de método para análise de licopeno e β-caroteno em polpa de tomate por cromatografia líquida de alta eficiência
Alves, Adriana Barreto;Silva, Marta Gomes da;Carvalho, Paulo Roberto Nogueira;Vissotto, Lizziane Cynara;Bragagnolo, Neura;
Química Nova , 2010, DOI: 10.1590/S0100-40422010000900025
Abstract: a method to quantify lycopene and β-carotene in freeze dried tomato pulp by high performance liquid chromatography (hlpc) was validated according to the criteria of selectivity, sensitivity, precision and accuracy, and uncertainty estimation of measurement was determined with data obtained in the validation. the validated method presented is selective in terms of analysis, and it had a good precision and accuracy. detection limit for lycopene and β-carotene was 4.2 and 0.23 mg 100 g-1, respectively. the estimation of expanded uncertainty (k = 2) for lycopene was 104 ± 21 mg 100 g-1 and for β-carotene was 6.4 ± 1.5 mg 100 g-1.
Separa??o cromatográfica quiral de anestésicos a partir de solu??es diluídas e concentradas em escala preparativa
Silva Jr., Ivanildo José da;Barreto Jr., Amaro Gomes;Santana, Cesar Costapinto;
Química Nova , 2009, DOI: 10.1590/S0100-40422009000200017
Abstract: in this work the separation of the chiral anesthetic compounds ketamine and bupivacaine was development using two chiral stationary phases (csp). ketamine enantiomers were well separate in the polysaccharide-based csp (microcrystalline cellulose triacetate - mcta) while bupivacaine in the tartardiamide-based csp (kromasil chi-tbb). in both cases, the effect of temperature was investigated under analytical conditions. an improvement in the separation performance with temperature was observed. thermodynamic parameters were evaluated by the van't hoff plot. we concluded that enthalpic effects controlled the retention in these chiral columns. the enantiomers of ketamine and bupivacaine were separated under overloaded conditions with a good performance.
Rheumatoid factor and tobacco exposure
Skare, Thelma Larocca;Silva, Marilia Barreto Gameiro;Silva, M?nica Gomes da;Gomes, Fábio;Rumor, Carla;Giacomini, Glaucio;
Brazilian Archives of Biology and Technology , 2002, DOI: 10.1590/S1516-89132002000200012
Abstract: this study was carried out to analyse the possible influence of smoking on the positivity of rheumatoid factor (rf) in healthy individuals in the region of curitiba, brazil. one hundred fifty blood donors (84 smokers and 66 non-smokers ) were studied for the presence of rf using nephelometry. smoking was found not to be correlated to the positivity of rf, independently of the smokers sex (men with p=0.09 and women with p=0.49), the number of cigarettes/day (p=0.20), duration of smoking (p=0.18) and cumulative exposure (time x quantity) to cigarettes (p=0.13).
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