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Search Results: 1 - 10 of 68326 matches for " José Espinoza "
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Púrpura trombocitopénico trombótico con respuesta exitosa a vincristina
Espinoza,Francisco; Leal,José Luis; Arenas,Guillermo;
Revista médica de Chile , 2007, DOI: 10.4067/S0034-98872007001200011
Abstract: thrombotic thrombocytopenic purpura presents as a multisystemic disease with thrombocytopenia, microangiopathic hemolytic anemia, fever, neurological and renal involvement. we report a 24 years-old male presenting with purpura and a generalized seizure. his blood tests showed an hemolytic anemia, unconjungated hyperbilirubinemia, increased lactated dehydrogenase, thrombocytopenia and impairment of renal function. he was initially treated with daily plasmapheresis and steroids without improvement. due to persistence of the disease, he was treated with two doses of intravenous vincristine in four days, with clinical and laboratory improvement. he was discharged 40 days after the last dose of vincristine, in good conditions
Púrpura trombocitopénico trombótico con respuesta exitosa a vincristina Successful treatment of thrombotic thrombocytopenic purpura with vincristine report of one case
Francisco Espinoza,José Luis Leal,Guillermo Arenas
Revista médica de Chile , 2007,
Abstract: Thrombotic thrombocytopenic purpura presents as a multisystemic disease with thrombocytopenia, microangiopathic hemolytic anemia, fever, neurological and renal involvement. We report a 24 years-old male presenting with purpura and a generalized seizure. His blood tests showed an hemolytic anemia, unconjungated hyperbilirubinemia, increased lactated dehydrogenase, thrombocytopenia and impairment of renal function. He was initially treated with daily plasmapheresis and steroids without improvement. Due to persistence of the disease, he was treated with two doses of intravenous vincristine in four days, with clinical and laboratory improvement. He was discharged 40 days after the last dose of vincristine, in good conditions
Intra- and inter-examiner reproducibility of manual probing depth
Andrade, Roberto;Espinoza, Manuel;Gómez, Elena Maria;Rolando Espinoza, José;Cruz, Elizabeth;
Brazilian Oral Research , 2012, DOI: 10.1590/S1806-83242012000100010
Abstract: the periodontal probe remains the best clinical diagnostic tool for the collection of information regarding the health status and the attachment level of periodontal tissues. the aim of this study was to evaluate intra- and inter-examiner reproducibility of probing depth (pd) measurements made with a manual probe. with the approval of an ethics committee, 20 individuals without periodontal disease were selected if they presented at least 6 teeth per quadrant. using a williams periodontal probe, three calibrated thesis-level students (k > 0.6) assessed pd at 6 sites per tooth, from the gingival margin to the bottom of the periodontal sulcus (rounded to the next 0.5 mm). initial and repeated measurements were performed by the same three examiners. the intra-examiner agreement (± 1 mm > 90%) was 99.85%, 100%, and 100% for the three examiners, respectively. when the variables vestibular/lingual surfaces, mesial/distal surfaces, or superior/inferior jaws were evaluated, no significant differences in reproducibility were detected at the inter-examiner level (p < 0.05). at this level, the only significant differences observed were in the three examiners' measurements of the anterior and posterior sites. while high intra-examiner reproducibility was detected, inter-examiner level proved to be low. we can conclude that measurement of pd with a manual periodontal probe produced high reproducibility in healthy individuals. the operator's position can affect the reproducibility of repeated measures of pd. calibration and operator training, rather than operator experience, were fundamental for reproducibility. other factors, such as individual technique and probing depth force, can affect inter-examiner reproducibility.
La incorporación de la mujer en la cirugía chilena The incorporation of women in Chilean surgery
Ricardo Espinoza G,Camila Onetto C,Juan José Lombardi A,Juan Pablo Espinoza G
Revista Chilena de Cirugía , 2012,
Abstract: Se ha observado un aumento del número de mujeres que estudia medicina. No obstante, la incorporación de la mujer a la cirugía sigue siendo baja. En Chile no conocemos de información sobre este tema. Nuestro objetivo fue recopilar información que proporcionara cifras y tendencias en este sentido. Se obtuvo información de la Sociedad de Cirujanos de Chile (SCCh), del Capítulo Chileno del Colegio Americano de Cirujanos (CCh CAC), de la Comisión Nacional Autónoma de Especialidades Médicas (CONACEM) y de la Superintendencia de Salud de Chile (SS), hasta junio de 2011. La SCCh tiene 854 socios y 64 corresponden a mujeres (7,5%). El Capítulo Chileno del CAC tiene 162 miembros y 4 son mujeres (2,5%). Ante CONACEM se han certificado 1.070 cirujanos, de los cuales 80 son mujeres (7,5%). En el registro de la SS hay 1.177 cirujanos, 8,4% de sexo femenino. El a o 1959 se incorporó la primera mujer a la SCCh. Desde ahí, el número ha sido progresivo, aumentando principalmente en las dos décadas recientes hasta alcanzar el 7,5% actual. No obstante este aumento, en todas las fuentes consultadas el porcentaje de mujeres en práctica quirúrgica es inferior al 10%. Pareciera ser que la mujer intenta realmente una mayor participación en el campo quirúrgico. Sin embargo, el "estilo de vida del cirujano", choca con una compatibilización mayor entre vida laboral y familiar. Creemos que hay espacio para investigaciones cualitativas en este campo, que reflejen mejor las motivaciones y dificultades de la mujer por acceder al mundo quirúrgico en nuestro medio. It has been observed an increasing number of women studying medicine. However, the incorporation of women to surgery remains low. In Chile we do not have information on this topic. Our goal was to collect information to provide the figures and trends in this regard. Information was obtained from the Society of Surgeons of Chile (SCCH), the Chilean Chapter of the American College of Surgeons (CCh CAC), the Autonomous National Commission of Medical Specialties (CONACEM) and the Superintendent of Health of Chile (SS), until June 2011. The SCCH has 854 partners and 64 were women (7.5%). The Chilean Chapter of the CCh CAC has 162 members and 4 women (2.5%). At CONACEM, 1.070 persons have been certified as surgeons, 80 are women (7.5%). In the register of SS there are 1.177 surgeons, 8.4% female. In 1959 the first women joined SCCH. Since then, the number has been progressive, growing mainly in the last two decades to reach the 7.5% now. Nevertheless, in all consulted sources, the percentage of women in surgical practice, still les
Transfus?o de sangue em terapia intensiva: um estudo epidemiológico observacional
Rocco, José Rodolfo;Soares, Márcio;Espinoza, Rodolfo Andrade;
Revista Brasileira de Terapia Intensiva , 2006, DOI: 10.1590/S0103-507X2006000300005
Abstract: background and objectives: packed red blood cell (prbc) transfusion is frequent in intensive care unit (icu). however, the consequences of anemia in icu patients are poorly understood. our aim was to evaluate the prevalence, indications, pre-transfusion hematocrit and hemoglobin levels, and outcomes of icu patients transfused with prbc. methods: prospective cohort study conducted at a medical-surgical icu of a teaching hospital during a 16-month period. patients' demographic, clinical, laboratory and transfusion-related data were collected. logistic regression was used after univariate analyses. results: a total of 698 patients were evaluated and 244 (35%) received prbc, mainly within the first four days of icu (82.4%). transfusion was more frequent in medical and emergency surgical patients. the mean pre-transfusion hematocrit and hemoglobin were 22.8% ± 4.5% and 7.9 ± 1.4 g/dl, respectively. transfused patients received 4.4 ± 3.7 prbc during icu stay and 2.2 ± 1 prbc at each transfusion. the icu (39.8% versus 13.2%; p < 0.0001) and hospital (48.8% versus 20.3%; p < 0.0001) mortality rates were higher in transfused patients. mortality increased as the number of transfused prbc increased (r2 = 0.91). in logistic regression, predictive factors for prbc transfusion were hepatic cirrhosis, mechanical ventilation (mv), type and duration of icu admission, and hematocrit. the independent factors associated to hospital mortality were mv, transfusions of more than five prbc and saps ii score. conclusions: prbc transfusions are frequent in icu patients, especially in those with medical and emergency surgical complications, longer icu stay, and hepatic cirrhosis and in need of mv. pre-transfusion hemoglobin levels were lower than those previously reported. in our study, prbc transfusion was associated with increased mortality.
Lagos S.,Rudecindo; Espinoza G.,Rodolfo; Orellana C,Juan José;
Revista chilena de nutrición , 2004, DOI: 10.4067/S0717-75182004000100007
Abstract: the association between maternal nutrition during the first trimester of pregnancy (bmi at 8-12th weeks) and foetal growth at term (mean birth weight) is shown in 9.735 pregnant women who gave birth in the maternity ward at the hospital regional de temuco (from 1994 to 2002). gestational age was well established and deliveries occurred at term (38 to 42 weeks). the centiles 10 and 90 of bmi observed at the beginning of pregnancy were 20.7 and 30.6 respectively. average birth weight at term (38-42 weeks) was 3560±442 g. a positive correlation was observed between bmi at the beginning of pregnancy and mean birth weight (r = 0.0611) for each unit of change of bmi (kg/m2) an increase of 27.9 g was founded in birth weight. a multiple regression analysis was performed using birth weight as depending variable and four independent variables (gestational age at delivery, sex of newborn, parity ,a and to a lesser degree, maternal age), indicating that bmi continued to be positively associated to birth weight (p<0.00). in this case, for every additional unit of maternal bmi at the beginning of pregnancy, an increase of 23.9 g in birth weight was observed. maternal body mass index at the beginning of pregnancy continues to be a predictive factor of birth weight, after correcting for intervening variables such as gestational age at delivery, newborn gender, parity and maternal age
Three-dimensional simulation of the entrance-impeller interaction of a hydraulic disc pump
Pérez,José Leonardo; Carrillo,Luis Pati?o; Espinoza,Henry;
Revista Técnica de la Facultad de Ingeniería Universidad del Zulia , 2006,
Abstract: a study of the fluidynamic behavior of the entrance-impeller interaction of a hydraulic disc pump is presented, through numerical simulations, using the finite volume method. a three-dimensional numerical model was developed, using the technique of multiblocks and structured meshes, by means of the commercial code cfx 4.3tm. the simulated model corresponds the flat impeller of (203 mm) of diameter to the exit, of a disc pump of simple suction. 8 flows were simulated, in those that the nominal flow, the maximum flow and the minimum flow were included. the simulations were carried out in stationary state and it took advantage the periodic condition of the flow inside the impeller, being reduced to section ?. the obtained load-flow curve was compared with the experimental pump curve given by the maker. the obtained curve, through the numerical results of the simulations, possesses a similar behavior to the experimental one, with values of load superiors to 15%, for the near flows to the nominal one. additionally, the interaction entrance-impeller was analyzed through of pressure and velocities profiles, that which allowed to know and to understand the behavior of these variables for the simulated conditions.
Espinoza,Omar; Bustos-Obregón,Eduardo; Suja,José A;
Revista chilena de anatomía , 2002, DOI: 10.4067/S0716-98682002000100005
Abstract: chemical environmental pollution is a major problem at present. agropesticides are relevant in this regard, since they affect human and animal health (draper, 1985; rodríguez & bustos-obregón, 2000). parathion" (pt), an organophosphorate pesticide inhibits acetylcholinesterase and is metabolized in liver, lung and brain. it is transformed in paraoxon (po), its active metabolite (chambers & chambers, 1990 and siller et al., 1997). this work analizes the effect of a single dose of pt on the apoptotic index of cf1 mouse hepatocytes. male cf1 mice (8 to 10 weeks old, average weight of 30 g) were treated with a single injection of pt, of 20 mg/kg body weight (sobarzo & bustos-obregón, 2000). the animals were sacrificed at 1, 8, 16, 28 and 50 days after injection. histological analysis of hepatic tissue was done by light microscopy for counting of apoptotic (and binucleated) cells in he stained slides. it has been postulated that pt is carcinogenic and that it modifies the ability of hepatocytes to regenerate (metcalfe & streuli, 1997 and fausto, 2000). we conclude that pt is cytotoxic even at low concentrations, since it increases apoptosis and affects the normal homeostasis of the hepatic tissue
Efecto de la fertilización con fósforo en la relación suelo-planta-animal en suelos ácidos del estado Cojedes, Venezuela
Díaz,Yris; Espinoza,Freddy; Gil,José L;
Zootecnia Tropical , 2004,
Abstract: with the purpose of evaluating the effect of two phosphorus sources on pasture yield and beef production, it was carried out an experiment in the central savannas of cojedes state, venezuela. treatments were randomly distributed as, t1: control (no p), t2: 300 kg/ha of partially acidulated rock phosphate (parp), and t3: 500 kg/ha of rock phosphate (rp). the variables were: dry matter pasture yield, crude protein, crude fiber content, calcium content, p content in grass, soil, blood and feces, and beef production by area. no significant differences were found among treatments (p>0.05) for any of the variables; however, it was observed an increase in y matter yield when pasture received p (2.4 and 2.6 t/ha/cut for parp and rp, respectively), compared to control (2.3 t/ha/cut). also, animal production by area was higher with parp treatment (206.4 kg/ha). it was not observed a response to p fertilization, possibly due to the lack of some other macro and micro nutrients, mainly nitrogen. phosphorus applications improved the balance of this element in the system, which would indicate the need of periodical p fertilization to avoid pasture degradation.
El dise?o cruzado: un dise?o para la experimentación con vacas lecheras
Obispo,Nestor E; Espinoza,Yusmary; Gil,José Luis;
Zootecnia Tropical , 2004,
Abstract: an arrangement in sequences of latin squares was demonstrated to be statistically efficient to detect the presence of residual effects in the experimentation with milk cows. with this purpose, the milk production of five cows was simulated in the application of three treatments during three periods of 15 days each. a program was generated to estimate the residual effects, and other three to be executed by the proc glm of sas: one for a complete model where all the present sources of variation were included, other to detect at least a period with residual effect, and finally a model similar to a classic latin square without taking into account the residual effects. the sequence of latin squares allowed to detect the residual effects of treatments and the calculation of the least squares means corrected by this effect.
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