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Search Results: 1 - 10 of 59056 matches for " Ciro Leite;David "
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Consenso brasileiro de monitoriza??o e suporte hemodinamico - Parte V: suporte hemodinamico
Lobo, Suzana Margareth Ajeje;Rezende, Ederlon;Mendes, Ciro Leite;Rea-Neto, álvaro;David, Cid Marcos;Dias, Fernando Suparregui;Schettino, Guilherme;
Revista Brasileira de Terapia Intensiva , 2006, DOI: 10.1590/S0103-507X2006000200010
Abstract: background and objectives: shock occurs when the circulatory system cannot maintain adequate cellular perfusion. if this condition is not reverted irreversible cellular injury establishes. shock treatment has as its initial priority the fast and vigorous correction of mean arterial pressure and cardiac output to maintain life and avoid or lessen organic dysfunctions. fluid challenge and vasoactive drugs are necessary to warrant an adequate tissue perfusion and maintenance of function of different organs and systems, always guided by cardiovascular monitorization. the recommendations built in this consensus are aimed to guide hemodynamic support needed to maintain adequate tisular perfusion. methods: modified delphi methodology was used to create and quantify the consensus between the participants. amib indicated a coordinator who invited more six experts in the area of monitoring and hemodynamic support to constitute the consensus advisory board. twenty five physician and two nurses selected from different regions of the country completed the expert panel, which reviewed the pertinent bibliography listed at the medline in the period from 1996 to 2004. results: recommendations were made answering 17 questions about hemodynamic support with focus on fluid challenge, red blood cell transfusions, vasoactive drugs and perioperative hemodynamic optimization. conclusions: hemodynamic monitoring by itself does not reduce the mortality of critically ill patients, however, we believe that the correct interpretation of the data obtained by the hemodynamic monitoring and the use of hemodynamic support protocols based on well defined tissue perfusion goals can improve the outcome of these patients.
Consenso brasileiro de monitoriza??o e suporte hemodinamico - Parte IV: monitoriza??o da perfus?o tecidual
Réa-Neto, álvaro;Rezende, Ederlon;Mendes, Ciro Leite;David, Cid Marcos;Dias, Fernando Suparregui;Schettino, Guilherme;Lobo, Suzana Margareth Ajeje;
Revista Brasileira de Terapia Intensiva , 2006, DOI: 10.1590/S0103-507X2006000200009
Abstract: background and objectives: the main cardiovascular function is to maintain the adequate perfusion e oxygen delivery to the cells. physiologically, this is controlled by the cellular metabolic rate. the critically ill patients are in high danger of tissue hipoperfusion and this is directly related to cellular injury and organ dysfunction. therefore, the tissue perfusion monitoring makes part and is indissociated of hemodynamic evaluation of the critically ill patient and is indicated to all this patients. the objective was to define recommendations about clinical utility of different tolls to bedside perfusion monitoring. methods: modified delphi methodology was used to create and quantify the consensus between the participants. amib indicated a coordinator who invited more six experts in the area of monitoring and hemodynamic support to constitute the consensus advisory board. twenty five physician and two nurses selected from different regions of the country completed the expert panel, which reviewed the pertinent bibliography listed at the medline in the period from 1996 to 2004. results: recommendations were done about the utility of clinical monitoring of tissue perfusion, temperature gradient and transcutaneous oxygen monitoring, serum lactate, base excess, svo2 and scvo2, gastric and sublingual capnometry, co2 venous-arterial gradient and orthogonal polarization spectral (ops). conclusions: the homodynamic compensation of a critically ill patient isn?t complete unless the tissue perfusion is corrected. many different methods of monitoring is available and are useful in clinical practice, however, none has accuracy and effectiveness characteristics to be used independently of clinical context.
Coffee leaf and stem anatomy under boron deficiency
Rosolem, Ciro Antonio;Leite, Vagner Maximino;
Revista Brasileira de Ciência do Solo , 2007, DOI: 10.1590/S0100-06832007000300007
Abstract: boron deficiency in coffee is widely spread in brazilian plantations, but responses to b fertilizer have been erratic, depending on the year, form and time of application and b source. a better understanding of the effects of b on plant physiology and anatomy is important to establish a rational fertilization program since b translocation within the plant may be affected by plant anatomy. in this experiment, coffee plantlets of two varieties were grown in nutrient solutions with b levels of 0.0 (deficient), 5.0 μm (adequate) and 25.0 μm (high). at the first symptoms of deficiency, leaves were evaluated, the cell walls separated and assessed for b and ca concentrations. scanning electron micrographs were taken of cuts of young leaves and branch tips. the response of both coffee varieties to b was similar and toxicity symptoms were not observed. boron concentrations in the cell walls increased with b solution while ca concentrations were unaffected. the ca/b ratio decreased with the increase of b in the nutrient solution. in deficiency of b, vascular tissues were disorganized and xylem walls thinner. b-deficient leaves had fewer and deformed stomata.
Magnetic topology and current channels in plasmas with toroidal current density inversions
David Ciro,Iberê L. Caldas
Physics , 2013, DOI: 10.1063/1.4825241
Abstract: The equilibrium magnetic field inside axisymmetric plasmas with inversions on the toroidal current density is studied. Structurally stable non-nested magnetic surfaces are considered. For any inversion in the internal current density the magnetic families define several positive current channels about a central negative one. A general expression relating the positive and negative currents is derived in terms of a topological anisotropy parameter. Next, an analytical local solution for the poloidal magnetic flux is derived and shown compatible with current hollow magnetic pitch measurements shown in the literature. Finally, the analytical solution exhibits non-nested magnetic families with positive anisotropy, indicating that the current inside the positive channels have at least twice the magnitude of the central one.
Gibberellin and cytokinin effects on soybean growth
Leite, Vagner Maximino;Rosolem, Ciro Antonio;Rodrigues, Jo?o Domingos;
Scientia Agricola , 2003, DOI: 10.1590/S0103-90162003000300019
Abstract: soybean is an important crop in brazil. nonetheless, there are no reports on the use of plant growth regulator potential in relation to this crop in the national literature. to better understand the role of these compounds, a pot experiment was carried out to study effects of ga3 and cytokinin on the vegetative growth of the soybean. ga3 (50 mg l-1) was applied as seed treatment, leaving plants with water application as control. ga3 (100 mg l-1) and cytokinin (30 mg l-1) were sprayed on leaves at the physiological stage v3/v4, and 15 days after, cytokinin (30 mg l-1), also as foliar spray. seed treatment decreased plant emergence and initial soybean root growth, but as the season progressed, differences in root growth disappeared; plants were shorter, and presented a decrease in the number of nodes, in stem diameter, in leaf area and in dry matter yield. conversely, foliar application of ga3 led to an increase in plant height, first node height and stem diameter. leaf area and dry matter production also increased as a result of ga3 foliar application. there was no effect of exogenous gibberellin and cytokinin on the number of soybean leaves, number of stem branches and root dry matter. joint application of gibberellin and cytokinin tended to inhibit gibberellin effects. cytokinin applied to leaves during soybean vegetative growth was not effective in modifying any of the evaluated plant growth variables.
Gibberellin and cytokinin effects on soybean growth
Leite Vagner Maximino,Rosolem Ciro Antonio,Rodrigues Jo?o Domingos
Scientia Agricola , 2003,
Abstract: Soybean is an important crop in Brazil. Nonetheless, there are no reports on the use of plant growth regulator potential in relation to this crop in the national literature. To better understand the role of these compounds, a pot experiment was carried out to study effects of GA3 and cytokinin on the vegetative growth of the soybean. GA3 (50 mg L-1) was applied as seed treatment, leaving plants with water application as control. GA3 (100 mg L-1) and cytokinin (30 mg L-1) were sprayed on leaves at the physiological stage V3/V4, and 15 days after, cytokinin (30 mg L-1), also as foliar spray. Seed treatment decreased plant emergence and initial soybean root growth, but as the season progressed, differences in root growth disappeared; plants were shorter, and presented a decrease in the number of nodes, in stem diameter, in leaf area and in dry matter yield. Conversely, foliar application of GA3 led to an increase in plant height, first node height and stem diameter. Leaf area and dry matter production also increased as a result of GA3 foliar application. There was no effect of exogenous gibberellin and cytokinin on the number of soybean leaves, number of stem branches and root dry matter. Joint application of gibberellin and cytokinin tended to inhibit gibberellin effects. Cytokinin applied to leaves during soybean vegetative growth was not effective in modifying any of the evaluated plant growth variables.
Consenso brasileiro de monitoriza??o e suporte hemodinamico - parte III: métodos alternativos de monitoriza??o do débito cardíaco e da volemia
Schettino, Guilherme;Ederlon, Rezende;Mendes, Ciro Leite;Réa-Neto, álvaro;David, Cid Marcos;Lobo, Suzana Margareth Ajeje;Barros, Alberto;Silva, Eliézer;Friedman, Gilberto;Amaral, José Luiz Gomes do;Park, Marcelo;Monachini, Maristela;Oliveira, Mirella Cristine de;Assun??o, Murillo Santucci César;Akamine, Nelson;Mello, Patrícia Veiga C;Pereira, Renata Andréa Pietro;Costa Filho, Rubens;Araújo, Sebasti?o;Pinto, Sérgio Félix;Ferreira, Sérgio;Mitushima, Simone Mattoso;Agareno, Sydney;Brilhante, Yuzeth Nóbrega de Assis;
Revista Brasileira de Terapia Intensiva , 2006, DOI: 10.1590/S0103-507X2006000100013
Abstract: background and objectives: cardiac output and preload as absolute data do not offer helpful information about the hemodynamic of critically ill patients. however, monitoring the response of these variables to volume challenge or inotropic drugs is a very useful tool in the critical care setting, particularly for patients with signs of tissue hypoperfusion. although pac remains the " gold standard" to measure cardiac output and preload, new and alternative technologies were developed to evaluate these hemodynamic variables. methods: modified delphi methodology was used to create and quantify the consensus between the participants. amib indicated a coordinator who invited more six experts in the area of monitoring and hemodynamic support to constitute the consensus advisory board. twenty three physician and two nurses selected from different regions of the country completed the expert panel, which reviewed the pertinent bibliography listed at the medline in the period from 1996 to 2004. results: recommendations regarding the use of arterial pulse pressure variation during mechanical ventilation, continuous arterial pulse contour and lithium dilution cardiac output measurements, esophageal doppler waveform, thoracic electrical bioimpedance, echocardiography and partial co2 rebreathing for monitoring cardiac output and preload were created. conclusions: the new and less invasive techniques for the measurement of cardiac output, preload or fluid responsiveness are accurate and may be an alternative to pac in critically ill patients.
Avalia??o da variabilidade de interven??es baseadas no cateter de artéria pulmonar: experiência brasileira
Mendes, Ciro Leite;Rezende, Ederlon;Dias, Fernando Suparregui;Réa-Neto, álvaro;
Revista Brasileira de Terapia Intensiva , 2006, DOI: 10.1590/S0103-507X2006000200006
Abstract: background and objectives: use of pulmonary artery catheter (pac) is still a debatable issue, mainly due to questions raised about its security and efficacy. this study reproduced in a sample of brazilian physicians, another one conducted amidst american doctors, in which was pointed out the heterogeneity of clinical decisions guided by data obtained from pac. methods: during the brazilian congress of intensive care medicine (curitiba 2004), doctors were asked to answer a survey form with three vignettes. each of them contained pac data and one half of the surveys contained echocardiographic information. every doctor was asked to select one of six interventions for each vignette. a homogeneous answer was considered when it was selected by at least 80% of the respondents. results: two hundred and thirty seven doctors answered the questionnaires. they selected completely different therapeutic interventions in all three vignettes and none of the interventions achieved more than 80% agreement. variability persisted with the choices guided by echocardiography. conclusions: as in the original study, we observed total heterogeneity of therapeutic interventions guided by cap and echocardiography. these results could be caused by lack of knowledge about basic pathophysiologic concepts and maybe we had to improve its teaching at the medical school benches.
Parte II: monitoriza??o hemodinamica básica e cateter de artéria pulmonar
Dias, Fernando Suparregui;Rezende, Ederlon;Mendes, Ciro Leite;Réa-Neto, álvaro;David, Cid Marcos;Schettino, Guilherme;Lobo, Suzana Margareth Ajeje;Barros, Alberto;Silva, Eliézer;Friedman, Gilberto;Amaral, José Luiz Gomes do;Park, Marcelo;Monachini, Maristela;Oliveira, Mirella Cristine de;Assun??o, Murillo Santucci César;Akamine, Nelson;Mello, Patrícia Veiga C;Pereira, Renata Andréa Pietro;Costa Filho, Rubens;Araújo, Sebasti?o;Félix Pinto, Sérgio;Ferreira, Sérgio;Mitushima, Simone Mattoso;Agareno, Sydney;Brilhante, Yuzeth Nóbrega de Assis;
Revista Brasileira de Terapia Intensiva , 2006, DOI: 10.1590/S0103-507X2006000100012
Abstract: background and objectives: monitoring of vital functions is one of the most important tools in the management of critically ill patients. nowadays is possible to detect and analyze a great deal of physiologic data using a lot of invasive and non-invasive methods. the intensivist must be able to select and carry out the most appropriate monitoring technique according to the patient requirements and taking into account the benefit/risk ratio. despite the fast development of non invasive monitoring techniques, invasive hemodynamic monitoring using pulmonary artery catheter still is one of the basic procedures in critical care. the aim was to define recommendations about clinical utility of basic hemodynamic monitoring methods and the use of pulmonary artery catheter. methods: modified delphi methodology was used to create and quantify the consensus between the participants. amib indicated a coordinator who invited more six experts in the area of monitoring and hemodynamic support to constitute the consensus advisory board. twenty-five physicians and nurses selected from different regions of the country completed the expert panel, which reviewed the pertinent bibliography listed at the medline in the period from 1996 to 2004. results: recommendations were made based on 55 questions about the use of central venous pressure, invasive arterial pressure, pulmonary artery catheter and its indications in different settings. conclusions: evaluation of central venous pressure and invasive arterial pressure, besides variables obtained by the pac allow the understanding of cardiovascular physiology that is of great value to the care of critically ill patients. however, the correct use of these tools is fundamental to achieve the benefits due to its use.
Periungual leishmaniasis
Gomes, Ciro Martins;Morais, Orlando Oliveira de;Leite, Anglya Samara Silva;Soares, Killarney Ataíde;Motta, Jorgeth de Oliveira Carneiro da;Sampaio, Raimunda Nonata Ribeiro;
Anais Brasileiros de Dermatologia , 2012, DOI: 10.1590/S0365-05962012000100024
Abstract: the vast majority of cases of cutaneous leishmaniasis are represented by limb injuries. a female patient, white, presented an ulcer with infiltrated borders located on the fourth finger of the left hand following occupational exposure in an area of native forest. diagnosis of cutaneous leishmaniasis caused by leishmania of the subgenus viannia was confirmed. the patient failed to respond to treatment with antimony, but achieved clinical cure after this was associated with pentoxifylline. the case highlights the rarity of the periungual location of the leishmanial lesion and the difficulties encountered in therapy.
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