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Search Results: 1 - 10 of 205624 matches for " Clara; Galván-Castillo "
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Consumo de drogas entre adolescentes: resultados de la Encuesta Nacional de Adicciones, 1998
Medina-Mora,Ma Elena; Cravioto,Patricia; Villatoro,Jorge; Fleiz,Clara; Galván-Castillo,Fernando; Tapia-Conyer,Roberto;
Salud Pública de México , 2003, DOI: 10.1590/S0036-36342003000700005
Abstract: objective: the aim of this paper is to describe drug and associated factors use among adolescents (12 to 17 years of age). material and methods: data come from the recent encuesta nacional de adicciones, 1998 (national survey on addictions) undertaken in urban areas of mexico. a probabilistic, multi-stage, stratified cluster sampling design was used to select the study population. the sampling unit was the individual in each household. statistical analysis consisted of the estimation of prevalences of drug use, with 95% confidence intervals. associations were analyzed using logistic regressions models. results: excluding tobacco and alcohol, 3.57% of males and 0.6% of females have used one or more drugs; 2.14% and 0.45% used them in the 12 months previous to the survey, and 1.4% and 0.3% in the previous 30 days, respectively. marihuana was the drug more often used by males (2.4%) and females (0.45%), followed by inhaled solvents (1.08% and 0.20%), and cocaine (0.99% and 0.22%), respectively. the risk of using illicit drugs was associated to being male, having dropped out from school, perceiving availability, drug use by family and friends, social tolerance among friends, and symptoms of depression. conclusions: adolescents between 12 to 17 years of age are exposed to increasing drug use. the rates of drug use have risen, especially in the northern region of mexico and in the big urban areas (tijuana, mexico city and guadalajara). these findings emphasize the need to develop campaigns to detect emotional problems. preventive measures should provide appropriate care to prevent drug use as a mechanism to cope with such emotional conflicts. also, more intense preventive interventions should be targeted to adolescents with a high probability of developing drug abuse.
Astrocitoma pilocítico de nervio óptico con afectación de retina
Rodríguez-Francia,P; Sánchez-Tocino,H; García-Cantera,M; Martín-Castillo,J;
Archivos de la Sociedad Espa?ola de Oftalmología , 2005, DOI: 10.4321/S0365-66912005001200010
Abstract: introduction: this is an atypical case of a pilocytic astrocytoma that involved the optic nerve (on) and the retina. clinical case: the patient was a 30-year-old male, who had attended once since his early childhood because of the suspicion of an intraocular tumor. the ophthalmology exploration showed an on and retinal coloboma in the right eye and microphthalmy, shutting of the pupil, retinal detachment and proof of an intraocular tumor in the left eye. the mr revealed an on tumor that involved the retina. the histopathological study after enucleation was pilocytic astrocytoma. discussion: long standing congenital pathology in a blind patient does not exclude the possibility of the patient suffering from other pathology as well.
Astrocitoma pilocítico de nervio óptico con afectación de retina Optic nerve pilocytic astrocytoma with retinal involvement
P Rodríguez-Francia,H Sánchez-Tocino,M García-Cantera,J Martín-Castillo
Archivos de la Sociedad Espa?ola de Oftalmología , 2005,
Abstract: Introducción: Se presenta un caso atípico de astrocitoma pilocítico de nervio óptico (NO) y retina. Caso clínico: Varón de 30 a os afiliado a la ONCE desde ni o, con sospecha de tumoración intraocular. En la exploración oftalmológica: coloboma de NO y retina en ojo derecho y microftalmos, seclusión pupilar, desprendimiento de retina y evidencia de una masa retiniana en ojo izquierdo. La RNM mostró una tumoración de NO y retina. El estudio anatomopatológico tras la enucleación diagnosticó astrocitoma pilocítico de NO y de retina. Discusión: La existencia de una patología congénita en un paciente con ceguera legal no excluye el que pueda presentar otras patologías. Introduction: This is an atypical case of a pilocytic astrocytoma that involved the optic nerve (ON) and the retina. Clinical case: The patient was a 30-year-old male, who had attended ONCE since his early childhood because of the suspicion of an intraocular tumor. The ophthalmology exploration showed an ON and retinal coloboma in the right eye and microphthalmy, shutting of the pupil, retinal detachment and proof of an intraocular tumor in the left eye. The MR revealed an ON tumor that involved the retina. The histopathological study after enucleation was pilocytic astrocytoma. Discussion: Long standing congenital pathology in a blind patient does not exclude the possibility of the patient suffering from other pathology as well.
Solubilidad de cobre complejado en CO2 supercrítico
Javier Rivera-De-la-Rosa,Juan Manuel Barbarín-Castillo,Josué Rodríguez-Díaz,Julio Isidro-Almaguer
Tecnología, Ciencia, Educación , 2005,
Abstract:
Objetivos de la reanimación hemodinámica en el traumatismo cráneo-encefálico grave: Otro punto de vista Objectives of hemodynamic resuscitation in severe head injuries: Another point of view
M.L. Gascón-Castillo,J.J. Egea-Guerrero,J. Revuelto-Rey,F. Murillo-Cabezas
Medicina Intensiva , 2012,
Abstract:
Ultrasonografía doppler transcraneal urgente: utilidad predictiva del vasoespasmo sintomático en la hemorragia subaracnoidea espontánea en pacientes con buena situación neurológica Emergency transcranial doppler ultrasound: predictive value for the development of symptomatic vasospasm in spontaneous subarachnoid hemorrhage in patients in good neurological condition
M.A. Mu?oz-Sánchez,F. Murillo-Cabezas,J.J. Egea-Guerrero,M.L. Gascón-Castillo
Medicina Intensiva , 2012,
Abstract: Objetivo: Establecer el valor predictivo, para desarrollar deterioro neurológico tardío de origen isquémico (DNI), de un estudio doppler transcraneal (DTC) en pacientes con hemorragia subaracnoidea espontánea (HSA) en buena situación neurológica. Dise o: Estudio descriptivo-observacional desarrollado durante 3 a os. ámbito: Cuidados Críticos y Urgencias. Pacientes: Se incluyeron de forma consecutiva aquellos pacientes con HSA en buena situación neurológica (Hunt-Hess I-III). Variables de Interés: DNI (disminución en 2 puntos del GCS o déficit focal), velocidad media (VM) en arterias cerebrales medias, índice de Lindegaard (IL). Se consideró patrón sonográfico de vasoespasmo (PSV) cuando la VM fue>120cm/s y existía un IL>3. Resultados: La media de edad de los 122 pacientes fue de 54,1±13,7 a os. El 57,3% eran mujeres. Se detectaron 24 pacientes con PSV (19,7%) encontrándose VM elevadas en 38 pacientes (31,1%). 21 pacientes desarrollaron DNI (VM 183+/-49cm/s), todos presentaron PSV. En los pacientes con DNI se detectó un aumento de VM de 22+/-5cm/s/24h durante los 3 primeros días. Al comparar aquellos pacientes que no presentaron VM elevadas (85 pacientes/VM 67+/-16,6cm/s) con respecto a los que desarrollaron DNI encontramos diferencias en las VM (p<0,001) y en el ΔVM/24h (8,30+/-4,5cm/s Vs 22+/-5cm/s) durante los 3 primeros días (p=0,009). Mediante curvas ROC, se fijó que el ΔVM/día de 21cm/s (p<0,001), era el que mejor predecía el DNI. Conclusión: Durante los 3 primeros días un incremento en la VM de 21cm/s/24h se asoció con el desarrollo de vasoespamo sintomático. El DTC es una herramienta útil para la detección de aquellos pacientes con HSA en riesgo de desarrollar DNI. Purpose: To examine the predictive value of an early transcranial Doppler ultrasound (TCD) study performed in the emergency department in patients with spontaneous subarachoniod hemorrhage (SAH) in good neurological condition, in order to know which patients are at high risk of developing delayed cerebral ischemia (DCI). Design: A descriptive observational study was carried out involving a period of 3 years. Setting: Critical Care and Emergency Department. Patients: The study consecutively included patients with SAH of grade I-III on the Hunt and Hess scale. Variables of Interest: DCI (decrease of 2 points in GCS or focal deficit), Mean Velocity (MV) of middle cerebral arteries (MCA), Lindegaard Index (IL). Sonographic vasospasm pattern (SVP) was considered if MCA-MV>120cm/sc and IL>3. Results: The mean age of the 122 patients was 54.1±13.7 years; 57.3% were women. SVP was detected in
Solvent-Free Synthesis of Carboxylic Acids and Amide Analogs of CAPE (Caffeic Acid Phenethyl Ester) under Infrared Irradiation Conditions  [PDF]
Pablo A. Martínez-Soriano, José R. Macías-Pérez, Ana María Velázquez, Brígida del Carmen Camacho-Enriquez, Gustavo Pretelín-Castillo, Mónica B. Ruiz-Sánchez, Víctor H. Abrego-Reyes, Saúl Villa-Trevi?o, Enrique Angeles
Green and Sustainable Chemistry (GSC) , 2015, DOI: 10.4236/gsc.2015.52011
Abstract: A convenient and easy method is described for the formation of carboxamides from carboxylic acids and primary amines in solventless conditions using infrared (IR) light. Thus, under IR light, cinnamic acid derivatives and amines can produce yields ranging from 50% to 85% of the resulting amide.
Ultrasonografía doppler transcraneal urgente: utilidad predictiva del vasoespasmo sintomático en la hemorragia subaracnoidea espontánea en pacientes con buena situación neurológica
Mu?oz-Sánchez,M.A.; Murillo-Cabezas,F.; Egea-Guerrero,J.J.; Gascón-Castillo,M.L.; Cancela,P.; Amaya-Villar,R.; Rincón-Ferrari,M.D.; Flores-Cordero,J.M.; Cayuela,A.; García-Alfaro,C.;
Medicina Intensiva , 2012, DOI: 10.1016/j.medin.2012.01.013
Abstract: purpose: to examine the predictive value of an early transcranial doppler ultrasound (tcd) study performed in the emergency department in patients with spontaneous subarachoniod hemorrhage (sah) in good neurological condition, in order to know which patients are at high risk of developing delayed cerebral ischemia (dci). design: a descriptive observational study was carried out involving a period of 3 years. setting: critical care and emergency department. patients: the study consecutively included patients with sah of grade i-iii on the hunt and hess scale. variables of interest: dci (decrease of 2 points in gcs or focal deficit), mean velocity (mv) of middle cerebral arteries (mca), lindegaard index (il). sonographic vasospasm pattern (svp) was considered if mca-mv>120cm/sc and il>3. results: the mean age of the 122 patients was 54.1±13.7 years; 57.3% were women. svp was detected in 24 patients (19.7%), although high velocities patterns (hvp) were present in 38 patients (31.1%). dci developed in 21 patients (mv183+/-49cm/sc), all with previous svp. in this group mv increased 22+/-5cm/sc/day during the first 3 days. the group without hvp (84 patients/mv of 67+/-16.6cm/sc), compared with dci group, showed differences in highest mv (p<0.001), and also δmv/day (8.30+/-4,5cm/sc vs 22+/-5cm/sc) during the first 3 days (p=0.009). in our series, roc analysis selected the best cut-off value for δmv/day as 21cm/sc (p<0.001). conclusion: during the first 3 days, an increase of 21cm/s/24h in mca-mv was associated with the development of symptomatic vasospasm. tcd is a useful tool for the early detection of patients at risk of dci after sah.
Cal, un antiguo material como una renovada opción para la construcción
Galván-Ruiz, M;Velázquez-Castillo, R;
Ingeniería, investigación y tecnología , 2011,
Abstract: in this research the transitions of the materials of the cycle of lime were studied. samples of calcium carbonate were obtained from a bank at the surroundings of bernal, querétaro. the calcium carbonate is the raw material to obtain calcium oxide after a process of calcination, and calcium hydroxide following a hydration. as a final stage of the lime cycle, the calcium hydroxide interacts with the carbon dioxide of the air to form calcium carbonate all over again. the changes during the cycle were described through x-ray diffraction by powders, for the identification of the crystalline phases. scanning electron microscopy was done to review the morphology, topology, structure and crystalline growth habit. to obtain the particles sizes distribution of the calcium hydroxide, dynamic dispersion of light was used. fourier transformed infrared spectroscopy was done to identify molecules and atomic connections. these results are a contribution to the field of the construction industry, as much as a starting point to new applications of the calcium hydroxide for the current engineering activities, and in conservation and restoration processes of the historical patrimony.
Radiografía de tórax: un recurso usualmente innecesario para el diagnóstico de la bronquiolitis
Castillo Galván, Ricardo;Cuello García, Carlos A.;
Boletín médico del Hospital Infantil de México , 2011,
Abstract: background. bronchiolitis is one of the leading controversial pediatric diseases because of its variations in diagnosis and treatment. use of diagnostic resources beyond the clinical features is usually unnecessary in its classic presentation. the objective of this study was to evaluate the prevalence of significant abnormalities in radiographic findings performed on infants <24 months of age who were hospitalized through the emergency department with the diagnosis of bronchiolitis, as well as to assess whether clinical variables can accurately identify children with abnormal chest x-ray in order to reduce unnecessary radiation exposure. methods. from september 2006 to march 2007, infants aged <24 months evaluated and hospitalized through the emergency department of the hospital san jose tec de monterrey with a diagnosis of bronchiolitis were included in the study. clinical variables were registered (age, gender, time since onset, oxygen saturation) and laboratory variables as well (leukocytes, lymphocytes, virus identified). information from the chest x-ray was also obtained. results. there were 128 patients included; 70% were aged <12 months. chest x-ray was performed in 122 patients (95.31 %) and respiratory virus studies were done in 119 patients (92.96%). there were 69 patients who were positive (57.99%); respiratory syncytial virus was demonstrated in 62 samples (89.85%) and 15 patients (12.29%) showed abnormal chest x-ray (atelectasis/consolidation). no differences were found between patients with and without chest x-ray abnormalities in clinical and laboratory variables. conclusions. most patients with bronchiolitis had a normal chest x-ray. our study suggests that x-rays in children with typical bronchiolitis have limited value.
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