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Search Results: 1 - 10 of 130692 matches for " Drina Véjar "
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Chromosomes of Girella laevifrons (Tschudi 1846) (Osteichthyes: Kyphosidae)
Northland-Leppe,Irma; Véjar,Drina; Jara-Seguel,Pedro; Fuentes,Nelson; Nú?ez,Cristian;
Gayana (Concepción) , 2010, DOI: 10.4067/S0717-65382010000200007
Abstract: the chromosome number and karyotype morphology of girella laevifrons (tschudi 1846) are described for the first time. g. laevifrons presents a chromosome number of 2n = 48 and its karyotype is formed in both sexes by 24 acrocentric chromosome pairs, similar to what has been described for other species of girella gray, 1835.
Chromosomes of Girella laevifrons (Tschudi 1846) (Osteichthyes: Kyphosidae) Cromosomas de Girella laevifrons (Tschudi 1846) (Osteichthyes: Kyphosidae)
Irma Northland-Leppe,Drina Véjar,Pedro Jara-Seguel,Nelson Fuentes
Gayana (Concepción) , 2010,
Abstract: The chromosome number and karyotype morphology of Girella laevifrons (Tschudi 1846) are described for the first time. G. laevifrons presents a chromosome number of 2n = 48 and its karyotype is formed in both sexes by 24 acrocentric chromosome pairs, similar to what has been described for other species of Girella Gray, 1835. El número cromosómico y la morfología del cariotipo de Girella laevifrons (Tschudi 1846) son descritos por primera vez. G. laevifrons presenta un número cromosómico 2n = 48 y su cariotipo está constituido por 24 pares de cromosomas acrocéntricos en ambos sexos, similar a lo documentado previamente para otras especies del género Girella Gray, 1835.
Hemosiderosis pulmonar
Leonardo Véjar M.
Revista chilena de pediatría , 1999,
Abstract:
Tuberculosis latente
Leonardo Véjar M
Revista Chilena de Enfermedades Respiratorias , 2012,
Abstract:
Adherencia a quimioprofilaxis de ni?os chilenos expuestos a tuberculosis del adulto
Véjar Mourgués,Leonardo; Henao R,Madrid;
Revista chilena de enfermedades respiratorias , 2006, DOI: 10.4067/S0717-73482006000300003
Abstract: the protection of exposed children (ec) is one of the cornerstones of tuberculosis (tb) control. there are limited information about chemoprophylaxis (cp) compliance in chile and worldwide. we evaluate this situation in south eastern metropolitan health service located in a poor district, providing free care for more than 400,000 children. we enroll in this study all kids under five years old, living in close contact with tb all forms patients. the children were referred between 2003 and 2005 to the pediatric pneumology unit. our tb contacts management protocol considers four visits: the first one for cxr, sputum smear (baar) and tuberculin (ppd 2 ut). the 2nd on is for diagnosis. the 3rd one 3 month follow up to check compliance and repeat ppd if previously negative; and 6 mo cxr for discharge. we indicate qp with isoniacide (hin) 5 mg/k/day for 6 mo to all exposed (cxr and baar negative independently of ppd). we stop qp on visit 3 if index case became baar (-) and if ppd is (-) twice. we follow with qp to all ppd (+) children till 6 mo. primary care centers had the responsibility to administer hin weekly to parents. compliance was evaluated verifying attendance to follow up in the pediatric unit. tb index case patients were 123, they had 318 exposed children, were excluded 21: moved houses 6; developed hin allergy 2; non pulmonary tb contacts ppd (-) 11; secondary cases 2 (in dot). at the second visit (diagnosis), 27 children quit (8%). 270 left for analysis. at the third visit, 160 turned up (59%) and 136 turned up for the 6 mo checkup (50%). it is possible some degree of inaccuracy in the information provided by parents about drugs administration but is clear that in our environment, compliance is deficient and increase with length of chemoprophylaxis
Lesiones subepicárdicas en Chile (Infarto Agudo del Miocardio con supradesnivel del Segmento ST): Experiencia con Telemedicina
Escobar C,Edgardo; Véjar J,Margarita; del Pino,Roberto;
Revista chilena de cardiología , 2009,
Abstract: background: telephonic transmission of an electrocardiogram (ecg) from rural areas to a center with cardiologist in place to analyze the records has been recently incorporated in chile, allowing earlier diagnosis of an acute myocardial infarction, even in remote places. such early diagnosis should prompt faster thrombolysis or primary angioplasty. aim: to describe demographics of the population in which diagnostic ecg were taken, plus date and time of the day when the diagnosis of ami was made. method: out of 523.371 ecg, we identified 3.656 records with epicardial lesions, defined as st elevation of at least 1 mm in 2 concordant leads (steami). the records were obtained with systems aerotel or cardiette, and were analyzed by 2 cardiologists. results: we found higher incidence of steami in man (69.2% vs 30.8%). older age was more frequently seen in women with steami. a higher incidence of steami was found between april and june, being more frequently observed between 9 am and 13 pm. the delay between the reception of the ecg and its interpretation was no longer than 10 min, regardless the time of the day, and including holidays conclusion: we confirmed some epidemiological data regarding steami in chile. this technology allows the early diagnosis of the steami from remotes areas of our country.
Adherencia a quimioprofilaxis de ni os chilenos expuestos a tuberculosis del adulto Chemoprofilaxis compliance in chilean children exposed to tuberculosis
Leonardo Véjar Mourgués,Madrid Henao R
Revista Chilena de Enfermedades Respiratorias , 2006,
Abstract: Se desconoce el grado de cumplimiento de la quimioprofilaxis (QP) en Chile y las publicaciones disponibles en el mundo son escasas. Las tasas de tuberculosis (TBC) del país al a o 2002 habían bajado a 20 por 100.000 y continúan bajando. Se está enfatizando ahora la protección de los expuestos, lo que se hace mediante administración de isoniacida (HIN). El manejo de contactos infantiles en nuestro hospital consiste en seguimiento de todos los expuestos a TBC bacilífera por 6 meses mediante 4 visitas. 1a ingreso para PPD 2 UT, radiografía de tórax (RXT) y Koch en caso de expectoración. 2a visita 72 h diagnóstico, 3a visita al tercer mes para control y eventualmente repetir PPD y 4a visita al 6o mes para dar alta con RXT. Evaluamos el grado de cumplimiento de QP verificando la asistencia a controles de los ni os contactos de enfermos TBC referidos desde 2003 a 2005 a la Unidad de Neumología Pediátrica. Se indicó QP según tuberculina: si PPD > 10 mm HIN 6 meses. Si PPD < 10 mm recibían HIN hasta repetir PPD en control de 3 meses. Si este resultaba positivo se continuaba con HIN hasta el sexto mes. Sin PPD (falla ocasional) HIN 6 meses. El HIN era entregado semanalmente desde los centros de atención primaria a los padres o personas a cargo de los ni os. Los casos índices estudiados fueron 123, contactos infantiles menores de 15 a os 318. Fueron excluidos 21: 6 traslados, 2 alergias HIN, 11 contactos de TBC extra pulmonar con PPD negativo (no se les indica control), 2 casos secundarios (en tratamiento directamente observado). Faltaron al 2o control (de diagnóstico) 27 (8%), quedando para análisis posterior 270 ni os. Asistieron al 3o control habiendo cumplido 3 meses de QP 160 ni os (59%) y al 6o mes 136 (50%). Cuando el PPD era positivo el cumplimiento fue mejor (75% y 69% respectivamente). Se concluye que en nuestro sector el cumplimiento de asistencia a controles es deficiente a los 3 meses y disminuye más aún al sexto mes The protection of exposed children (EC) is one of the cornerstones of tuberculosis (TB) control. There are limited information about chemoprophylaxis (CP) compliance in Chile and worldwide. We evaluate this situation in South Eastern Metropolitan Health Service located in a poor district, providing free care for more than 400,000 children. We enroll in this study all kids under five years old, living in close contact with TB all forms patients. The children were referred between 2003 and 2005 to the Pediatric Pneumology Unit. Our TB contacts management protocol considers four visits: The first one for CXR, sputum smear (BAAR) and tubercul
Lesiones subepicárdicas en Chile (Infarto Agudo del Miocardio con supradesnivel del Segmento ST): Experiencia con Telemedicina Telephonic transmission of electrocardiograms for early diagnosis of ST elevation Acute Myocardial Infarction in Chile
Edgardo Escobar C,Margarita Véjar J,Roberto del Pino
Revista Chilena de Cardiología , 2009,
Abstract: Antecedentes: La transmisión telefónica del electrocardiograma (ECG) a un centro de análisis ha permitido el diagnóstico precoz del infarto agudo del miocardio (IAM), incluso en lugares remotos de nuestro país. La ley AUGE exige el tratamiento inmediato del IAM con trombolisis y/o el traslado del paciente a un centro de referencia para su ulterior tratamiento. Objetivo: Tabularlas características demográficas, distribución geográfica de la población estudiada, fecha y hora de presentación del IAM. Métodos: De un total de 523.371 ECG se analizaron 3.656 trazados con lesiones subepicárdicas definidas por desnivel superior de ST de a lo menos de 1 mm en dos o más derivaciones consecutivas (IAM con SDST). Los ECG fueron adquiridos con sistemas Aerotel o Cardiette y analizados por dos cardiólogos. Resultados: Se confirmó la mayor incidencia de IAM en hombres (69.2% vs 30.8%) y la presentación del IAM a una edad mayor en mujeres. Se registró un mayor número de IAM entre los meses de Abril y Julio, y entre las 09 y 13 horas. Los tiempos de respuesta del sistema desde el momento de la recepción del ECG hasta el envío del informe no superó los 10 min, a cualquier hora del día o la noche, tanto en días hábiles como no hábiles. Conclusión: Se consignaron antecedentes epidemiológicos del IAM en el país, a la vez que se comprobó que el sistema permite un diagnóstico precoz del IAM, lo cual puede tener un impacto positivo en el tratamiento de esta patología. Background: Telephonic transmission of an electrocardiogram (ECG) from rural areas to a center with cardiologist in place to analyze the records has been recently incorporated in Chile, allowing earlier diagnosis of an Acute Myocardial Infarction, even in remote places. Such early diagnosis should prompt faster thrombolysis or primary angioplasty. Aim: To describe demographics of the population in which diagnostic ECG were taken, plus date and time of the day when the diagnosis of AMI was made. Method: Out of 523.371 ECG, we identified 3.656 records with epicardial lesions, defined as ST elevation of at least 1 mm in 2 concordant leads (STEAMI). The records were obtained with systems Aerotel or Cardiette, and were analyzed by 2 cardiologists. Results: We found higher incidence of STEAMI in man (69.2% vs 30.8%). Older age was more frequently seen in women with STEAMI. A higher incidence of STEAMI was found between April and June, being more frequently observed between 9 AM and 13 PM. The delay between the reception of the ECG and its interpretation was no longer than 10 min, regardless the time of the day, and inc
Marriage in Honey Bees Optimization Algorithm for Flow-shop Problems
Pedro PALOMINOS,Francisco TOLEDO,Andrés VéJAR,Miguel ALFARO
Informatica Economica Journal , 2012,
Abstract: The objective of this work is to make a comparative study of the Marriage in Honeybees Op-timization (MBO) metaheuristic for flow-shop scheduling problems. This paper is focused on the design possibilities of the mating flight space shared by queens and drones. The proposed algorithm uses a 2-dimensional torus as an explicit mating space instead of the simulated an-nealing one in the original MBO. After testing different alternatives with benchmark datasets, the results show that the modeled and implemented metaheuristic is effective to solve flow-shop type problems, providing a new approach to solve other NP-Hard problems.
Sistemas de ingeniería: problemas, modelos y algoritmos de solución para la ayuda en la toma de decisiones Engineering systems: problems, models and algorithms in decision making
Alfredo Candia-Véjar,Marcela González
Ingeniare : Revista Chilena de Ingeniería , 2011,
Abstract:
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