Browsing by Autor "L Manuel Santos"

Now showing 1 - 3 of 3

CARACTERIZACIÓN DE 129 MUJERES CON CÁNCER DE CUELLO UTERINO EN EL IAHULA, MÉRIDA-VENEZUELA
(2013) Roberto Rotta Escalante; María Eugenia Noguera; Francisco J. López; L Manuel Santos
Introduction Cervical cancer is one of the main causes of death in Venezuela. This research is focused on the description of women with this pathology who attended the University of the Andes Teaching Hospital in 2009 and the importance of improving the cytological screening. Materials and Methods The medical histories of 128 patients with cervical cancer seen at the Gynaecology and Obstetrics Unit of the University of the Andes Teaching Hospital in 2009 were reviewed. The information was collected in an ad hoc data form. Results in 104 of the medical histories reviewed the average age was 49.2 years; 44.2 % of the patients came from Zulia State, in “sexarquia” the media was 17 years, the number of sexual couples 2.45, the most frequent stage (39.6%) was stage III, the epidermoid type was present in 85 patients and the treatment applied was a combination of radio therapy and chemotherapy (37%). Conclusions The risk factors of cervical cancer increases in patients having sex at an early age or having many sexual partners. If the disease is diagnosed in a late stage, life expectancy is lower. A poor coverage of the investigation is evident. This must alert the health system to attack the disease with appropriate and frequent cytological controls.
Estudios electroquímicos para la deposición de CuGaSe2 usando iones citrato como agente complejante
(European Organization for Nuclear Research, 2022) Manfredy Luigi; Márquez Olga; Márquez Jairo; Martínez Yris; Balladores Yanpiero; L Manuel Santos
Se estudió el sistema electroquímico Cu-Ga-Se en medio electrolítico 0,5M de Na2SO4 a pH 2,5 y se estudió la influencia de los iones citrato en la deposición de películas del semiconductor CuGaSe2. Los estudios mediante voltametría cíclica nos muestran un sistema Cu-Ga-Se complejo, con gran cantidad de procesos involucrados en la formación de la película. Con base en los resultados voltamétricos, se intentó sintetizar películas de CuGaSe2, usando la técnica de electrolisis potenciostática, a diferentes potenciales de deposición y usando como medio electrolítico una solución que contenía: 0,01M de SeO2, 0,01M de CuSO4, 0,02M de Ga3+ y 0,05M de ácido cítrico disueltos en 0,5M de Na2SO4. Los análisis de EDX mostraron que en el intervalo de potenciales -0,6V y -1,1V vs SCE no se detecta la presencia de galio en las películas sintetizadas. El galio se deposita, en forma irregular, no homogénea, a potenciales sobre los -1,2V vs SCE. Los resultados no evidencian algún efecto favorable en la formación del semiconductor CuGaSe2, atribuible a la presencia del complejante citrato en el medio electrolítico, si es probable que un tratamiento térmico a estas películas mejore la estequiometría de las mismas.
Preeclampsia y Actividad Simpática en Embarazada a Término. Mérida. Venezuela
(2001) Rosmeris López; Gabriela Arata de Bellabarba; Carmen Zoraida Molina; L Manuel Santos; Vanessa Villarroel
The objective was to study in preeclampsic women the sympathetic activity by the determination of the plasmatic perypheric levels of norepinephrine (NE) in supine and standing position (orthostatic test). It is a prospective, casecontrol study; 44 women with simple pregnancy were evaluated, 22 (group A) with non treated preeclampsy diagnosis, with no diabetes, hypertension (previous to the pregnancy), or renal disease, and 22 healthy pregnants as control (group B). At the beginning ithe NE concentration in supine and standing position, the blood pressure and cardiac frequency were determined. The mean age was 22 ± 5 years; the pregnancy time was 38 ± 2 weeks, and two pregnancies. Hypertension was the family disorder in 55 % of the study group and 41 % in group B. The basal systolic and diastolic blood pressures were statistically different in both groups, mean 145/97 mm Hg for group A and 94/67 mm Hg for group B. Mothers cardiac frequencies were not statistically different in both groups. The basal NE levels were 218 pg/ml and 241 pg/ml and in standing position were 274 pg/ml and 297 pg/ml respectively, without statistic significance. Group a showed a bimodal aggregation towards the extremes (n = 9) 126 pg/ml and (n = 13) 328 pg/ml, statiscally different from the control (n = 22) 241 pg/ml. The orsthostatic test answer was 25 % for group A and 23 % for group B, statistically similar but low in relation to non pregnant patients of the same age.