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Search Results: 1 - 10 of 592881 matches for " Marcelo A.;Díaz "
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Factores de mal pronóstico en pacientes internados con neutropenia al inicio del período febril
Marcelo Zylberman,Fernando A. Díaz Couselo
Medicina (Buenos Aires) , 2007,
Abstract:
Catheter-Related Acremonium kiliense Fungemia in a Patient with Ulcerative Colitis under Treatment with Infliximab
Fernando A. Díaz-Couselo,Marcelo Zylberman
Case Reports in Infectious Diseases , 2011, DOI: 10.1155/2011/710740
Abstract: Acremonium spp. are filamentous, cosmopolitan fungi commonly isolated from plant debris and soil. They are infrequent pathogens in humans. Acremonium fungemia has been reported in neutropenic patients associated with central venous catheters and in nonneutropenic patients receiving long-term total parenteral nutrition. TNF-α blockade is associated with fungal infections, but no Acremonium spp. infection had been reported up to the present. In this paper, we present a patient with ulcerative colitis who developed Acremonium kiliense fungemia associated with infliximab therapy while receiving total parenteral nutrition. The patient was successfully treated with voriconazole. Acremonium sp. infection must be suspected as another cause of fungal infection in patients under treatment with infliximab.
Filtros de vena cava en pacientes con cáncer
Díaz Couselo,Fernando A.; Crerar,Silvina; Cravero,Patricia; Santaera,Omar; Eisele,Guillermo; Zylberman,Marcelo;
Medicina (Buenos Aires) , 2012,
Abstract: cancer patients with venous thromboembolism (vte) have more complications related to the anticoagulation treatment than the general population. vena cava filters are a useful tool in cancer patients, but their use in advanced disease is controversial. in this paper, we reviewed the indications, complications and frequency of retrieval of vena cava filters in cancer patients with vte. twenty seven patients with vena cava filter placements were analyzed. twenty five had solid tumors and two non hodgkin lymphomas. twenty five were under active treatment (surgery and/or chemotherapy). nineteen were classified as stage iv of disease. indications for filter placement were perioperative prophylaxis in 14 cases (51.9%), hemorrhage (n = 5), thrombocytopenia (n = 4), central nervous system metastases (n = 2), stroke (n = 1) and previous neurosurgery (n = 1). eight (29.6%) filters were retrieved. the median time to retrieval was 21 days (range: 6-75). there was no statistically significant difference in the frequency of retrieval between perioperative prophylaxis placement (6/14) and other contraindications for anticoagulation treatment (2/13; p = 0.2087). there were no adverse events related to the placement or retrieval procedures.
Endocarditis trombótica no bacteriana bivalvular asociada a cáncer y ecocardiograma transesofágico
Zylberman,Marcelo; Díaz Couselo,Fernando A.; Sánchez,Flavio; Santos,Daniel; Nervo,Adrián;
Medicina (Buenos Aires) , 2006,
Abstract: non bacterial thrombotic endocarditis is the most frequent cause of ischemic stroke in cancer patients. up to 9% of autopsies of cancer patients show non infectious valvular masses. however, bivalvular involvement is not frequently occurring in 9% of non bacterial thrombotic endocarditis. we report a patient with ovarian cancer who presented aphasia. the mri was compatible with cerebral ischemia. the transthoracic echocardiogram was normal and a transesophageal echocardiogram showed vegetations in aortic and mitral valves. we emphasize the importance of suspecting non bacterial thrombotic endocarditis in patients with cancer and systemic embolism and the low frequency of bivalvular involvement.
Infiltrados pulmonares en pacientes con cáncer
Díaz Couselo,Fernando A.; Morero,José L.; Sánchez,Flavio; Dictar,Miguel; Zylberman,Marcelo;
Medicina (Buenos Aires) , 2008,
Abstract: pulmonary infiltrates remain as a diagnostic and therapeutic challenge in cancer patients. in order to evaluate the etiology, diagnostic methods used, intensive care unit admission and in-hospital mortality, we conduced an observational, prospective study which included all patients with cancer and recent pulmonary infiltrates admitted to the instituto alexander fleming between august 2003 and march 2006. diagnostic methods were categorized in sequential steps of complexity: 1st step: radiological pattern of the pulmonary infiltrates, blood and sputum cultures, serological tests and empirical treatment response; 2nd step: bronchoalveolar lavage (bal), non bronchoscopic tracheal aspirate and mini-bal; 3rd step: pulmonary or extrapulmonary biopsies. pulmonary infiltrate etiology was classified as: infection, treatment complication, disease progression, cardiovascular or mixed. diagnosis was classified as proved or probable. a total of 106 samples from 103 patients were included. the etiologies were infection in 61 cases, disease progression in 4, treatment complication in 6, cardiovascular in 6 and mixed in 7. proved diagnosis was obtained in 33 cases and probable diagnosis in 51 while 22 cases could not be diagnosed. nine of the 10 diagnoses of mycoses were in oncohematologic cases. seventy cases did not go further than procedures included in the 1st step. thirty two cases stopped after diagnostic procedures of the 2nd step and 4 required biopsies. forty four cases required intensive care unit admission. in-hospital mortality was 30.2%. in our study, infection was the most frequent etiology. mycoses were more frequent in oncohematologic cases. a proved or probable diagnosis was obtained in 84 (79.2%) cases. in 53.7% of the cases only non-invasive diagnostic methods were required.
Serological evidence of Rickettsia parkeri as the etiological agent of rickettsiosis in Uruguay
Conti-Díaz, Ismael A.;Moraes-Filho, Jonas;Pacheco, Richard C.;Labruna, Marcelo B.;
Revista do Instituto de Medicina Tropical de S?o Paulo , 2009, DOI: 10.1590/S0036-46652009000600005
Abstract: we report three new rickettsiosis human cases in uruguay. the three clinical cases presented clinical manifestations similar to previous reported cases of rickettsia parkeri in the united states; that is mild fever (< 40 oc), malaise, headache, rash, inoculation eschar at the tick bite site, regional lymphadenopathy, and no lethality. serological antibody-absorption tests with purified antigens of r. parkeri and rickettsia rickettsii, associated with immunofluorescence assay indicated that the patients in two cases were infected by r. parkeri. epidemiological and clinical evidences, coupled with our serological analysis, suggest that r. parkeri is the etiological agent of human cases of spotted fever in uruguay, a disease that has been recognized in that country as cutaneous-ganglionar rickettsiosis.
Perfil y Conducta Ambiental de los Estudiantes de la Universidad de Talca, Chile
Arcadio Cerda U.,Leidy García P.,Marcelo Díaz M.,Cristián Nú?ez N.
Panorama Socioeconómico , 2007,
Abstract: El objetivo general de este estudio fue analizar el perfil y la conducta ambiental de los alumnos de la Universidad de Talca. El modelo adoptado se centra en determinar el papel que juegan los valores, actitudes y creencias, tanto generales como específicas, y los antecedentes conductuales (intenciones conductuales y normas personales) como determinantes del comportamiento. La metodología utilizada corresponde al análisis factorial y de regresión. El análisis factorial sugiere que la actitud y percepción sobre el medio ambiente de los alumnos de la Universidad de Talca es positiva; se puede afirmar que los alumnos poseen una intención conductual neutra frente al medio ambiente, aunque del análisis de las normas personales, se infiere que los alumnos poseen normas personales positivas. Sin embargo, el análisis del comportamiento realizado indica que los alumnos poseen un comportamiento negativo frente al medio ambiente. Por otro lado, el análisis de regresión realizado para explicar la conducta ambiental presentó varianzas explicadas que fluctuaron entre 27,6 y 8,5% y no se obtuvieron diferencias entre los distintos modelos estimados.
Endocarditis trombótica no bacteriana bivalvular asociada a cáncer y ecocardiograma transesofágico Bivalvular non bacterial thrombotic endocarditis associated with cancer and transesophageal echocardiography
Marcelo Zylberman,Fernando A. Díaz Couselo,Flavio Sánchez,Daniel Santos
Medicina (Buenos Aires) , 2006,
Abstract: La endocarditis trombótica no bacteriana es la causa más frecuente de accidente cerebrovascular isquémico en pacientes con cáncer. En estos pacientes se hallaron vegetaciones valvulares hasta en el 9% de las autopsias. Sin embargo, la afección bivalvular es poco frecuente, observándose en el 9% de las endocarditis trombóticas. Se presenta una paciente con cáncer de ovario que presentó afasia e imágenes compatibles con isquemia cerebral. El ecocardiograma transtorácico fue normal. El ecocardiograma transesofágico evidenció vegetaciones en las válvulas aórtica y mitral. Se enfatiza la importancia de sospechar endocarditis trombótica no bacteriana en enfermos con cáncer y embolismo sistémico y en la escasa frecuencia de afección bivalvular. Non bacterial thrombotic endocarditis is the most frequent cause of ischemic stroke in cancer patients. Up to 9% of autopsies of cancer patients show non infectious valvular masses. However, bivalvular involvement is not frequently occurring in 9% of non bacterial thrombotic endocarditis. We report a patient with ovarian cancer who presented aphasia. The MRI was compatible with cerebral ischemia. The transthoracic echocardiogram was normal and a transesophageal echocardiogram showed vegetations in aortic and mitral valves. We emphasize the importance of suspecting non bacterial thrombotic endocarditis in patients with cancer and systemic embolism and the low frequency of bivalvular involvement.
La conciencia desde un punto de vista filosófico. Cuestiones conceptuales
Marcelo Díaz Soto
Revista Chilena de Neuropsicologia , 2012, DOI: 10.5839/rcnp.2012.0701.03
Abstract: In this paper we approach two controversial perspectives to be found in some philosophical approach to consciousness, the first one deals with the different uses of the terms “consciousness” and “to be aware of” so as to identify theirs uses which appears to be unsettling for neurobiologists and philosophers. For neurobiologists the contentious aspect lies on the concept of subjectivity, and for a philosopher in the category of qualia. The second one consists in upholding the thesis that puts into doubt the explicative character of the great majority of the materialist perspectives underlying current explanations of consciousness and qualia.
Tratamiento laparoscópico de quistes renales simples sintomáticos
Castillo,Octavio A.; DeGiovanni,Diego; Sánchez-Salas,Rafael; Foneron,Alejandro; Vitagliano,Gonzalo; Díaz,Manuel A.; Fajardo,Marcelo;
Archivos Espa?oles de Urología (Ed. impresa) , 2008, DOI: 10.4321/S0004-06142008000300006
Abstract: objectives: simple renal cysts (src) are usually asymptomatic and do not require any kind of treatment. laparoscopy is a reasonable minimally invasive surgical option for symptomatic cysts. herein, we present the results of the laparoscopic technique for the treatment of symptomatic renal cysts performed in our institution. methods: between november 1992 and may 2006, 41 patients with symptomatic renal cysts were laparoscopically treated. the surgical techniques employed were transperitoneal and retroperitoneal. demographic and surgical data was prospectively collected and analysis retrospectively performed. results: 41 patients were treated for symptomatic renal cysts in a fourteen year period. 23 (56%) women and 18 (44%) men, with a median age of 54 years. (range 27-74 years.). all patients in the series were symptomatic. pain was the most frequent symptom. median cyst size was 10 cm. (range 5-16 cm.). transperitoneal approach was performed in 24 patients (58%) and retroperitoneal in 17 (42%). no differences were verified between these approaches. 16 lesions were located at the left renal unit, 24 in the right renal unit (54%) and one case presented bilateral lesions (3%). median operative time was 52 min. (range 20-150 min.), median hospital stay was 42 hours (range 12-96 h.). 39 cysts (95.2%) were classified as bosniak?s type i lesions, 2 lesions (4.8%) were type ii based on bosniak?s description. final pathology confirmed every lesion as a simple renal cyst. there was only one relapse in the series. the latter was treated percutaneously. conclusions: laparoscopy is a feasible, safe and advantageous surgical therapeutic option for symptomatic renal cysts.
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