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Search Results: 1 - 10 of 656044 matches for " Mónica; Ríos P "
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Catabolic Response Profiles, Catabolic Uniformity and Richness as Microbiological Indicators in a Soil of Pergamino, Buenos Aires Province, with and without Previous Application of Glyphosate  [PDF]
Ruth P. Ríos, Lidia Giuffré, Romina I. Romaniuk, Mónica G. Pérez, Eduardo A. Pagano
Journal of Agricultural Chemistry and Environment (JACEN) , 2016, DOI: 10.4236/jacen.2016.52009
Abstract: Incubation assay in trays was performed with two soils with different application histories of glyphosate: no application, and previous application. The soils used were Typic Argiudolls of Pergamino, province of Buenos Aires, and the treatments were: control (no application), and 20, 200 and 2000 mg of active ingredient per kg of soil. Sampling was performed at the beginning (T0) and 45 days after (T45). Catabolic response profiles (CRP), catabolic richness and catabolic uniformity were determined according to the methodology based on measuring the differences in respiration induced by substrate in a short time (4 hours). The substrates used in this study were 20, namely, two amines, 5 aminoacids, two carbohydrates, and 11 carboxylic acids. The objective of this work was to compare soils with different histories of application of glyphosate, measuring its effect on catabolic response profiles, catabolic uniformity and catabolic richness. In this study, no differences were observed between catabolic richness among the different sampling times and doses of glyphosate applied. Glyphosate application affected the structure of the soil microbial communities. At the end of the test, soils with all doses of previous herbicide application showed greater catabolic uniformity than soils without previous application.
Methodologies used to estimate tobacco-attributable mortality: a review
Mónica Pérez-Ríos, Agustín Montes
BMC Public Health , 2008, DOI: 10.1186/1471-2458-8-22
Abstract: A search was made in the Medline database until March 2005 in order to obtain papers that addressed the methodology employed for attributing mortality to tobacco use.Of the total of 7 methods obtained, the most widely used were the prevalence methods, followed by the approach proposed by Peto et al, with the remainder being used in a minority of studies.Different methodologies are used to estimate tobacco attributable mortality, but their methodological foundations are quite similar in all. Mainly, they are based on the calculation of proportional attributable fractions. All methods show limitations of one type or another, sometimes common to all methods and sometimes specific.Since the association between tobacco and mortality was first discovered [1,2], the task of attributing a given number deaths to smoking has been and continues to be a controversial process, beset by limitations and questioned from different quarters, including the powerful tobacco industry. With the appearance of the successive revisions of the International Classification of Diseases (ICD), there has been considerable progress in the process of categorizing mortality, but little in methods for attributing mortality to risk factors such as tobacco. Obtaining reliable estimates of the impact of tobacco on mortality would facilitate to have a clearer picture of the problem caused by smoking and would be of help in the planning of health policy.The task of quantifying smoking-attributable mortality has been performed mainly through indirect methods. This review sought to list and to describe the different methods of estimating mortality attributed to tobacco use, to indicate the principal methodological differences existing among them, and to identify the possible sources of variability in the results.In order to obtain papers that addressed the methodology employed for attributing mortality to tobacco use, a search was made in the Medline database until March 2005, using the terms, mortality, a
Trasplante hepático en adultos: casuística de Clínica Alemana de Santiago Adult liver transplantation: A single-center experience from Chile
Juan Hepp K,Horacio Ríos R,Leopoldo Suárez P,Mónica Zaror Z
Revista médica de Chile , 2002,
Abstract: Background: The success of orthotopic liver transplantation (OLT) has resulted in its widespread use for different liver diseases. Aim: To report our 8 years experience with adult OLT at Clinica Alemana de Santiago. Patients and methods: In all transplantations done at the center, we recorded patient's overall data and survival, postoperative medical and surgical complications and causes of death. Results: Between November 1993 and September 2001, 51 consecutive OLT were performed in 44 patients (22 females, median age 45 years old). Thirty eight patients presented with chronic and 6 with acute or sub-acute liver failure. Cryptogenic cirrhosis and hepatitis C infection were the most common causes for OLT. Postoperative bleeding and extra-hepatic biliary complications were seen in 17.6 and 21.5% of cases respectively. Acute rejection, bacterial infections, CMV infection or disease and post OLT hemodialysis were the most common medical complications (51, 31, 19.6 and 19.6% of cases respectively). The overall 1 and 5 years survival rates were 80% and 73% respectively. Considering exclusively the last 22 OLT performed since January 1999, the 1 year survival rate has improved to 91%. Conclusions: Liver transplantation in Chile provides a good long term survival with acceptable morbidity, due to a multidisciplinary approach management. The survival rates have improved over the last few years probably due to better surgical techniques, ICU care and immunosuppression. These overall results are comparable with those from other Centers in developed countries (Rev Méd Chile 2002; 130: 779-86)
Verónica Chamy P,Felipe Cardemil M,Pablo Betancour M,Matías Ríos S
Revista Chilena de Obstetricia y Ginecología , 2009,
Abstract: Antecedentes: El embarazo en edades tardías es una condición que ha aumentado en los últimos a os. Objetivo: Evaluar el riesgo materno y perinatal en embarazadas mayores de 35 a os. Método: Estudio de cohorte retrospectiva de todos los embarazos atendidos en el hospital Dr. Gustavo Fricke de Vi a del Mar, entre enero de 2001 y diciembre de 2006. Se excluyeron menores de 20 a os. Se analizaron variables maternas y perinatales. Resultados: En el período hubo 16.338 partos, 10,9% fueron en mujeres entre 35 y 39 a os y 3,6% en embarazadas de 40 a os o más. Un 27,2% de los embarazos fue en primigestas. La comparación entre embarazadas de 20-34 a os y de 35-39 a os mostró mayor frecuencia de hipertensión arterial crónica, hospitalización durante el embarazo, diabetes, preeclampsia, hemorragia del tercer trimestre, parto cesárea, hemorragia puerperal, menor peso del recién nacido, y defectos congénitos, entre otros. Hubo mayor frecuencia de rotura prematura de membranas al analizar las mayores de 40 a os. Las primigestas tuvieron mayor frecuencia de obesidad, preeclampsia, diabetes, hospitalización del recién nacido, y hemorragia puerperal. Al realizar una regresión logística para determinar influencia de la edad, se apreció que el riesgo de comorbilidades y eventos adversos maternos y fetales aumentaba proporcionalmente con la edad. Conclusión: La edad materna se asoció significativamente en forma independiente con resultados maternos y perinatales adversos. Hubo mayor riesgo para la mayoría de las variables analizadas en embarazadas de 35 a os o más. Background: Pregnancy in elderly ages is a condition that has been rising in the last years. Objective: To evaluate the maternal and perinatal risk of pregnant over the 35 years-old. Methods: Retrospective cohort study of all pregnant women attended in Dr. Gustavo Fricke Hospital, Vi a del Mar, from January 2001 to December 2006. Patients under 20 years were excluded. Maternal and perinatal variables were analyzed. Results: 16,338 childbirths were analyzed, 10.9% were in women between 35 and 39 years, and 3.6% in women of 40 years or more. A 27.2% of the pregnancy was the first gestation. A greater frequency of chronic hypertension, hospitalization during pregnancy, diabetes, preeclampsia, third trimester hemorrhage, cesarean section, postpartum hemorrhage, low birth weight, and congenital defects, among others, were found when comparing pregnant of 20-34 years-old with pregnant of 35-39 years-old. Elevated frequencies of premature rupture of fetal membranes were found in women over 40 years. First gestation wom
Population-based versus hospital-based controls: are they comparable?
Ruano-Ravina,Alberto; Pérez-Ríos,Mónica; Barros-Dios,Juan Miguel;
Gaceta Sanitaria , 2008, DOI: 10.1590/S0213-91112008000600018
Abstract: objective: to compare whether there are differences among hospital and population controls. methods: two case-control studies were conducted on lung cancer risk factors in the santiago de compostela public health district. whereas one used randomly chosen census-based population controls, the other used consecutive hospital controls that went to the reference hospital for non-smoking-related trivial interventions. the differences were analyzed using logistic regression. the dependent variable was type of control (hospital or population). results: hospital controls had a similar tobacco habit than population controls, but consumed more alcohol. for those consuming more than 50 ml daily, the risk of being a hospital control was 4.83 (95%ci: 2.55-9.14). conclusions: there may be some differences between hospital and population-based controls, which must be taken into account in the design of case-control studies. it is necessary to ascertain whether such differences are reproduced at other geographic locations and whether they can affect estimation of exposure-disease.
El cáncer de pulmón como marcador de tabaquismo: relación con la mortalidad por cáncer no pulmonar
Pérez-Ríos,Mónica; Leistikow,Bruce; Montes,Agustín;
Gaceta Sanitaria , 2009, DOI: 10.1590/S0213-91112009000300012
Abstract: objective: to assess the possible role of tobacco smoke in non-lung cancer (excluding stomach cancer) using changes in lung cancer mortality rates as a proxy for tobacco exposure. methods: a time series analysis of cancer mortality was performed to evaluate the possible association between changes in mortality rates for lung cancer and for non-lung, non-stomach cancer (nlns) from 1970 to 2003 in spanish males. to avoid problems with autocorrelation, prais-winsten regression was applied. results: changes in nlns cancer death rates showed a parallel trend with lung cancer death rates in the study period, with an adjusted slope of 1.07, 95% ci of 0.98-1.17, and r2 of 0.97. conclusion: variation in nlns cancer death rates can be accurately modelled as a function of changes in lung cancer death rates for the study period, suggesting a possible association between tobacco exposure and nlns cancers.
Neuritis óptica en ni os: Experiencia clínica en 13 a os Optic Neuritis in children: Clinic experience in 13 years
Alejandra Siebert V,Mónica Troncoso Sch,Loreto Ríos P,Claudia Amarales O
Revista Chilena de Neuro-Psiquiatría , 2009,
Abstract: Antecedentes: En pediatría la neuritis óptica generalmente se presenta después de un cuadro infeccioso, con edema de papila, que suele ser bilateral y tiene buen pronóstico. La conversión a esclerosis múltiple es baja. Nuestro objetivo es presentar las características clínicas y de laboratorio de casos de neuritis óptica en pediatría. Pacientes y Método: Se analizan 10 casos clínicos de neuritis óptica en ni os y jóvenes entre 5 y 17 a os, referidos entre los a os 1995 a 2008. Resultados: La edad media de la serie fue de 11 a os. 8 casos eran de sexo femenino; cuatro tenían antecedentes de infección respiratoria. En 8 de 10 pacientes el compromiso fue bilateral y 5 casos evolucionaron con neuritis óptica retrobulbar. La resonancia magnética mostró hiperintensidad en T2 en los nervios ópticos afectados en 5 pacientes. El estudio de líquido cefalorraquídeo y bandas oligoclonales fue normal en todos los casos. Los pacientes tratados con metilprednisolona endovenosa tuvieron buena recuperación. Sólo dos casos evolucionaron a esclerosis múltiple. Discusión: En esta serie predonimaron los pacientes de sexo femenino y el antecedente infeccioso fue poco frecuente. Los casos que evolucionaron a esclerosis múltiple no mostraron diferencias clínicas; sólo presentaron mayor cantidad de lesiones hiperintensas en la RM. Tuvieron mejor pronóstico visual los enfermos tratados con metilprednisolona. Background: In pediatric optic neuritis usually occurs after an infectious event, with papilledema, bilateral and with good prognosis, with a low incidence of conversion to multiple sclerosis. The aim of this paper is to present the clinical and laboratory characteristics of cases of optic neuritis in children. Patients and Methods: 10 clinical cases of optic neuritis in children and youth aged 5 to 17 years, referred between 1995 to 2007. Results: The median age at presentation was 11 years. 8 cases were females. Four cases with a history of respiratory infection, bilateral involvement in 8 of 10 patients and 5 cases of retrobulbar optic neuritis. Magnetic resonance imaging showed T2 hyperintensity in the optic nerves affected in 5 patients. The study of cerebrospinal fluid was normal and oligoclonal bands in all cases. The cases treated with intravenous methylprednisolone had good recovery. Two cases have multiple sclerosis. Discussion: In this series of female patients predominated and limited history of previous infection. Cases with multiple sclerosis showed no clinical differences, but more hyperintense lesions on magnetic resonance. The cases treated with methylpredni
Bacteriología urinaria asintomática en mujeres diabéticas tipo 2 Prevalence of asymptomatic bacteriuria in type 2 diabetic women
Tatiana Mendoza R,Manuel García de los Ríos A,Mónica Lafourcade R,Cristina Soto P
Revista médica de Chile , 2002,
Abstract: Background: Urinary tract infection (UTI) is frequent among diabetics, especially women. It may be preceded by asymptomatic bacteriuria. Aim: To study the frequency of asymptomatic bacteriuria in type 2 diabetic women. Patients and methods: Fifty women with type 2 diabetes and 50 non diabetic women were studied. In aseptic conditions, morning midstream urine specimens were obtained for microbiological analysis. The test was repeated in similar conditions during consecutive days. Urine samples were cultured in blood agar, Mac Conkey agar and CPS ID 2. Colony forming units were counted. Asymptomatic bacteriuria was defined as the presence of 100,000 or more colony forming units per ml. Leukocyturia was also quantified. Results: There was microbial growth in 40% of samples from diabetic women and 6% of samples from controls (p <0.01). Asymptomatic bacteriuria was present in 32% of diabetics and 4% of controls (p <0.01). E Coli was the most frequently isolated strain, in 55% of patients and 100% of controls. Klebsiella pneumoni was isolated in 10% of diabetics, coagulase negative Staphylococcus in 10%, Enterococcus spp in 10% and Pseudomonas aeruginosa in 5%. Leukocyturia of more than 10 cells per field, was present in 80% of diabetic women with positive culture. Women with positive cultures had a longer lasting diabetes than those with negative cultures. There was no association between urine microbiological results and glycosilated hemoglobin, fasting blood glucose, chronic complications of diabetes and treatment received. Conclusions: This study shows a high prevalence of asymptomatic bacteriuria among diabetic women (Rev Méd Chile 2002; 130: 1001-7).
Abandono del consumo de tabaco en las fumadoras gallegas durante el embarazo o la lactancia, 1954-2004
Pérez-Ríos,Mónica; Santiago-Pérez,María Isolina; Alonso,Bego?a;
Gaceta Sanitaria , 2006, DOI: 10.1590/S0213-91112006000500009
Abstract: objective: to determine how many women living in galicia (spain) quit smoking during pregnancy and in the first 6 months of breast feeding. a second objective was to identify possible temporal changes in smoking cessation. method: data retrospectively provided by smokers and ex-smokers living in galicia were analyzed. results: a total of 31.9% (26.9-37.0) of galician smokers did not quit smoking during pregnancy or in the 6 first months of breast feeding. no statistically significant differences were found in the percentage of women who stopped smoking in relation to the period when they became pregnant. a tendency towards lower cessation rates was found. conclusions: a high percentage of pregnant women do not quit smoking during pregnancy or in the first 6 months of breast feeding. these data indicate that health policies on smoking during pregnancy and breast feeding should be improved.
Chamy P,Verónica; Cardemil M,Felipe; Betancour M,Pablo; Ríos S,Matías; Leighton V,Luis;
Revista chilena de obstetricia y ginecología , 2009, DOI: 10.4067/S0717-75262009000600003
Abstract: background: pregnancy in elderly ages is a condition that has been rising in the last years. objective: to evaluate the maternal and perinatal risk of pregnant over the 35 years-old. methods: retrospective cohort study of all pregnant women attended in dr. gustavo fricke hospital, vi?a del mar, from january 2001 to december 2006. patients under 20 years were excluded. maternal and perinatal variables were analyzed. results: 16,338 childbirths were analyzed, 10.9% were in women between 35 and 39 years, and 3.6% in women of 40 years or more. a 27.2% of the pregnancy was the first gestation. a greater frequency of chronic hypertension, hospitalization during pregnancy, diabetes, preeclampsia, third trimester hemorrhage, cesarean section, postpartum hemorrhage, low birth weight, and congenital defects, among others, were found when comparing pregnant of 20-34 years-old with pregnant of 35-39 years-old. elevated frequencies of premature rupture of fetal membranes were found in women over 40 years. first gestation women had higher frequency of obesity, preeclampsia, and hospitalization during pregnancy, diabetes and postpartum hemorrhage. using logistic regression to determinate the influence of age, we determine that the risk of co morbidity and maternal and fetal adverse events, increase according to age. conclusion: maternal age was associated independently and significantly with adverse maternal and perinatal results. major risk was observed for the majority of the variables analyzed in pregnant of 35 years or more.
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