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Dive into the research topics where Luis E Vega-Briceño is active.

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Featured researches published by Luis E Vega-Briceño.


Archivos De Bronconeumologia | 2004

Utilidad del lavado broncoalveolar en niños inmunodeprimidos: rendimiento y complicaciones

Luis E Vega-Briceño; N. Holmgren; Pablo Bertrand; J.I. Rodríguez; F. Barriga; Ilse Contreras; Ignacio Sánchez

Objetivo Los ninos inmunodeprimidos presentan el riesgo de desarrollar neumonia por germenes oportunistas. El papel del lavado broncoalveolar (LBA) en la evaluacion de estos pacientes es aun controvertido. Material Y Metodo Se revisaron las fichas de pacientes con inmunodepresion y sintomas respiratorios a los que se les habia practicado un LBA en el Servicio de Pediatria del Hospital Clinico de la Pontificia Universidad Catolica de Chile. Resultados Se practicaron 68 LBA en 54 ninos inmunodeprimidos (edad media: 7,5 anos). Los sintomas respiratorios mas frecuentes fueron fiebre (90%) y tos y dificultad respiratoria (81%); el 18% tenia neutropenia y el 43%, trombocitopenia. Todos los pacientes estaban en tratamiento antibiotico de amplio espectro. Las muestras del LBA proporcionaron un germen especifico en 25 pacientes (37%). Los patogenos aislados fueron: bacterias en 21 casos, virus en 6, Pneumocystis carinii en 5, hongos en 4 y Mycobacterium tuberculosis en uno. Catorce (19%) LBA se realizaron a ninos que recibian ventilacion mecanica. La evolucion fue satisfactoria en todos los casos. Se registraron 21 complicaciones, 17 menores (hipoxemia leve o fiebre) y 4 mayores que requirieron intubacion traqueal. No se registraron muertes. Conclusiones La evaluacion fibrobroncoscopica asociada a un LBA fue un metodo seguro, con un adecuado rendimiento, que permitio evaluar la etiologia de los infiltrados pulmonares en la radiografia de torax. Tanto los resultados positivos como los negativos del LBA contribuyeron al tratamiento de estos pacientes.


Revista Chilena De Infectologia | 2007

Empiema y efusión pleural en niños

Luis E Vega-Briceño; Dahiana Pulgar B; Nils Holmgren P; Pablo Bertrand N; José l Rodríguez C; Ignacio Sánchez D

Introduccion: El empiema pleural (EP) es una complicacion grave de la neumonia adquirida en la comunidad (NAC). Objetivos: Describir las caracteristicas de los pacientes hospitalizados por EP en el Servicio de Pediatria del Hospital de la Universidad Catolica durante el periodo 2000-2005. Se identificaron 86 hospitalizaciones por NAC con efusion pleural, practicandose en 59 (70%), al menos una toracocentesis. Se considero EP a la presencia de pus, tincion de Gram con bacterias, cultivo positivo o pH < 7,10 en el liquido pleural, siendo las efusiones para-neumonicas los controles. Resultados: Se analizaron 24 EP y 25 controles [promedio 2,9 anos (rango: 8 meses - 14,3 anos)], 78% de edad inferior a 5 anos con diferencia entre los grupos EP y controles [1,6 vs 3,3 anos, respectivamente (p = 0,01)]. El promedio global (dias) de sintomas previo al ingreso en los EP fue 7 (rango: 2-21), siendo los mas frecuentes fiebre (100%) y tos (96%). Se identifico algun microorganismo en 15/24 EP, Streptococcus pneumoniae fue el mas frecuente (n: 9). En 48 ninos, el manejo inicial fue conservador, requiriendose cuatro rescates quirurgicos luego del cuarto dia. El promedio (dias) de hospitalizacion fue significativamente superior en el grupo EP vs controles [15 (rango: 5-38) vs 9 (rango: 3-16) (p < 0,01)]. Requirieron drenaje pleural 83% del grupo EP y 36% de los controles (p = 0,002). No hubo diferencia en el numero de dias de empleo de oxigeno [6 vs 4,5 (p = 0,36)] o drenaje pleural [3 vs 2,5 (p = 0,29)]. No se registraron fallecidos. Conclusion: El EP en ninos fue una condicion respiratoria aguda que se asocio a estadias hospitalarias prolongadas, especialmente en los de menor edad, no requiriendose, en la mayoria, una intervencion quirurgica de rescate


Revista chilena de pediatría | 2005

Fibrosis quística: Actualización en sus aspectos básicos

Luis E Vega-Briceño; Ignacio Sánchez D

Los avances en torno al conocimiento de la proteina de regulacion de transmembrana de la fibrosis quistica (CFTR) han permitido entender mejor la fisiopatologia de esta enfermedad y la compleja relacion genotipo-fenotipo. Los diversos fenotipos clinicos estan influenciados no solo por la clase de mutacion registrada, sino tambien por factores ambientales y probablemente otros genes reguladores. CFTR regula la composicion y cantidad de liquido en el epitelio de la via aerea, primariamente por su accion sobre el cloro, pero tambien regula diferentes canales y transporta otras moleculas. Ademas, CFTR regula una respuesta inflamatoria frente a bacterias como Pseudomona aeruginosa y Staphylococcus aureus. Es probable que todos estos factores influyen en la historia natural de la FQ de cada paciente. El entendimiento de los aspectos basicos y sus implicancias clinicas podria brindar futuras y nuevas aproximaciones terapeuticas


Revista Medica De Chile | 2005

Infección respiratoria por virus influenza en niños: ¿Qué aprendimos durante el año 2004?

Luis E Vega-Briceño; Marcela Potin; Pablo Bertrand; Ignacio Sánchez

BACKGROUND Infants and toddlers have the highest influenza hospitalization rate in pediatrics. Although the impact of this virus in children has been recognized, there is no defined statement related to vaccination in this population. AIM To describe clinical and epidemiological characteristics of complicated influenza infections in hospitalized children. MATERIAL AND METHODS All hospitalizations due to influenza virus were recorded prospectively between March and June 2004. RESULTS We registered 40 laboratory-confirmed influenza admissions. Median age was 24 months (range: 15 days-14.5 years), 52% males, 18 younger than 2 years. Most of them had an underlying medical condition. The most common conditions were recurrent wheeze in 17, a neurological disease in 7 and asthma in 6. Twenty had more than one condition and 15 were previously healthy. The average days of respiratory symptoms and fever prior to admission were 5 and 3, respectively. The most common discharge diagnoses were concomitant viral-bacterial pneumonia in 53%, viral pneumonia in 38% and laryngitis in 8%. Influenza virus A was identified in 34/40 children. Oxygen supplementation was required by 34 cases; 20% of which required an O2 inspired fraction over 40%. The average days of hospitalization and oxygen were 4 and 3, respectively. Eleven children were treated with amantadine and 21 with antimicrobials. Four children were admitted to pediatric intensive care units and two cases required non-invasive ventilatory support. No deaths were recorded. CONCLUSIONS Our data confirms the importance of influenza virus infection in children, as measured by admission rates, complications and length of hospital stay. Young children are a risk group for which immunization is recognized as protective.


Archivos De Bronconeumologia | 2004

Utility of Bronchoalveolar Lavage in Immunocompromised Children: Diagnostic Yield and Complications

Luis E Vega-Briceño; N. Holmgren; Pablo Bertrand; J.I. Rodríguez; F. Barriga; Ilse Contreras; Ignacio Sánchez

OBJECTIVE Immunocompromised children are at high risk for developing pneumonia due to opportunistic pathogens. The role of bronchoalveolar lavage (BAL) in the evaluation of such patients is still controversial. MATERIAL AND METHOD We reviewed the hospital records of immunosuppressed patients with respiratory symptoms who had undergone BAL in the pediatric department of the Hospital Clinico de la Pontificia Universidad Católica of Chile. RESULTS Sixty-eight BAL were performed on 54 children (mean age: 7.5 years) receiving wide-spectrum antibiotic treatment. The most frequent respiratory signs and symptoms were fever (90%) and cough and respiratory distress (81%); 18% had neutropenia and 43% thrombocytopenia. A specific pathogen was identified in BAL samples for 25 patients (37%). The pathogens isolated were bacteria in 21 cases, viruses in 6, Pneumocystis carinii in 5, fungi in 4, and Mycobacterium tuberculosis in one. Fourteen (19%) of the children who underwent BAL were on mechanical ventilation. Outcome was satisfactory in all cases. Twenty-one complications were recorded, 17 of which were minor (mild hypoxemia or fever) and 4 major, requiring tracheal intubation. No deaths were recorded. CONCLUSIONS Evaluation by fiberoptic bronchoscopy together with BAL proved to be a safe procedure with an adequate diagnostic yield that made it possible to determine the etiology of the pulmonary infiltrates seen in chest x-rays. Both positive and negative results of BAL were useful for treating the patients.


Revista Medica De Chile | 2006

Fibrosis quística: enfrentando la transición desde el pediatra hacia el internista

Luis E Vega-Briceño; Ernesto Guiraldes C; Ignacio Sánchez D

The increased survival of patients with cystic fibrosis (CF) resulted inthe appearance of new pulmonary and non-pulmonary complications. Even though subjects with CFpresent with inflammatory pulmonary changes at birth, several pathogens such as Staphyloccocusaureus, Haemophilus influenzae and Pseudomona aeruginosa contribute to the progression ofpulmonary injury. Clinical presentations vary according to patient age; even though mild forms exist,patients with severe forms, develop respiratory insufficiency and end-stage disease at an early stage.Today, new diagnostic and therapeutic tools, increase the possibility of an early diagnosis and ofgreater survival. Successful management will depend on the timely selection of adequateantimicrobials, the use of pancreatic enzyme supplementation and early institution to respiratoryphysiotherapy. The transition from pediatric care to adult care must occur according to developmentof each patient. This timing must be flexible and there should be a constant communication andcoordination within the different specialists in internal medicine. Thus, it is crucial to recognize thedisease progression as a continuous process, giving the appropriate physiologic support andevaluating the needs of the patient and close relatives (Rev Med Chile 2006; 134: 365-71).(


Revista Chilena De Infectologia | 2008

Hospitalización por influenza en un Servicio de Pediatría de Santiago de Chile, 2001-2005

Luis E Vega-Briceño; Lisbeth Platzer M; Katia Abarca; Dahiana Pulgar B; Ignacio Sánchez D

BACKGROUND Influenza cause high hospitalization rates and complications in children. OBJECTIVE To describe clinical and epidemiological characteristics of influenza infection in hospitalized children. PATIENTS AND METHODS In Universidad Católica Hospital, all hospitalizations due to influenza in children aged 15 days to 14 years, occurring between January 2001 and December 2005 were reviewed. RESULTS Of a total of 3570 admissions associated with a respiratory illness, 124 (3.5%) were due to influenza, of which 75% presented between the months of April and June. Median age was 20.5 months (60% younger than 2 years) and 24% had an underlying risk factor. Most common symptoms were fever (94%) and dry cough (61%) and 75% of the children required oxygen. The most frequent complication was pneumonia (53%). The mean duration of hospitalization and oxygen use were 4.4 and 2.5 days respectively. Fifty two children (49.1%) received an antibiotic and nine children were admitted to intensive care unit. No deaths were recorded. CONCLUSION Influenza virus cause serious complications and affects mostly healthy children younger than 2 years.


Revista chilena de pediatría | 2005

Laringotraqueobronquitis en niños hospitalizados: Características clínicas

Fernando Iñiguez O.; Luis E Vega-Briceño; Dahiana Pulgar B; Carla Díaz P.; Ignacio Sánchez D

Introduccion: Laringotraqueobronquitis (LTB) es una condicion frecuente en ninos, con escasos estudios publicados en la literatura nacional. Objetivo: Caracterizar los episodios de LTB en nuestra institucion. Metodo: Estudio retrospectivo descriptivo del 2001 al 2003. Resultados: 68 pacientes sufrieron 72 episodios de LTB. La edad promedio fue 16,5 meses, 62% eran varones. La mayoria de los ingresos ocurrieron en otono (65%). El numero de dias promedio de sintomas previo al ingreso fue 2, siendo los mas frecuentes estridor (85%), tos seca (78%) y fiebre (72%). La estadia promedio duro 1 dia. Se identifico virus Parainfluenza en 12 de 23 inmunofluorescencias. La terapia incluyo adrenalina (100%), corticoides (96%), oxigeno (15%), salbutamol (11%) y antibioticos (11%). Las complicaciones fueron neumonia (3%) y traqueitis bacteriana (2%). Conclusion: En nuestra serie, LTB fue mas frecuente en varones y menores de 2 anos, con clara estacionalidad, estadias hospitalarias cortas y un bajo riesgo de complicaciones


Revista Chilena De Infectologia | 2009

Características clínicas de la enfermedad respiratoria causada por Mycoplasma pneumoniae en niños hospitalizados

Luis E Vega-Briceño; Marcela Potin S; Marcela Ferrés G; Dahiana Pulgar B; Cristián García B; Linus Holmgren P; Ignacio Sánchez D

Resumen Introduccion: La infeccion por Mycoplasma pneu-moniae es una condicion respiratoria poco estudiada en nuestro medio. Objetivo: Describir las caracteristicas clinicas de los ninos hospitalizados por M. pneumoniae . Materiales y Metodos: Se analizaron todos los pacientes hospitalizados por infecciones respiratorias durante el 2000-2005, con IgM especifica; se utilizo como diag-nostico de enfermedad por M. pneumoniae la presencia de fluorescencia verde manzana 2 a 3 positivo en titulos ≥ 1:32 diluciones. Resultados: Se analizaron 50 hospita-lizaciones, con estadia promedio de 4 dias (rango: 1-10); la edad promedio fue 5,4 anos (46% bajo 5 anos). Los sintomas mas frecuentes fueron tos (92%), fiebre (82%), compromiso del estado general (74%) y dificultad respi-ratoria (72%). Al momento del ingreso 40/45 presentaron hipoxemia. La radiografia de torax (RT) revelo infiltrado intersticial (69,3%), foco de consolidacion (51%) e hi-perinsuflacion (28,5%). Seis presentaron efusion pleural asociada. En 84% la evolucion fue favorable; sin embargo, 8 ninos ingresaron a la Unidad de Paciente Critico para monitorizacion. No hubo decesos


Pediatric Pulmonology | 2008

Plethysmographic Lung Volumes in Normal Chilean Children and Adolescents

Solange Caussade; Dahiana Pulgar; Luis E Vega-Briceño; Paola Viviani; Carla Díaz; Ilse Contreras; Ignacio Sánchez

Plethysmographic measurement is the most reliable method for evaluating lung volumes in children. Current published normative data are based on studies in primarily Caucasian children.

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Ignacio Sánchez D

Pontifical Catholic University of Chile

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Ignacio Sánchez

Pontifical Catholic University of Chile

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Dahiana Pulgar B

Pontifical Catholic University of Chile

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Ilse Contreras

Pontifical Catholic University of Chile

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Pablo Bertrand N

Pontifical Catholic University of Chile

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Nils Holmgren P

Pontifical Catholic University of Chile

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Pablo Bertrand

Pontifical Catholic University of Chile

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Cristián García B

Pontifical Catholic University of Chile

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Lisbeth Platzer M

Pontifical Catholic University of Chile

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N. Holmgren

Pontifical Catholic University of Chile

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