Anthropogenic Contamination in the Free Aquifer of the San Luis Potosí Valley.

The San Luis Potosí valley is an endorheic basin that contains three aquifers: a shallow unconfined aquifer of alluvial material and two deep aquifers, free and confined. The groundwater contamination documented for the shallow aquifer generates contamination of the deep unconfined type aquifer, from which part of the population's drinking water needs are met. This study records incipient anthropogenic contamination of two types: biogenic and potentially toxic trace elements. The studied contaminants include fecal coliform bacteria, total coliform, nitrate, and potentially toxic elements such as: manganese (Mn), mercury (Hg), arsenic (As), and cadmium (Cd). This contamination in some locations exceeds the permissible limit for human consumption. Some major consequences to health, including severe illness, may be caused by the trace elements. The present results give a first signal about the contamination of the deep unconfined type aquifer due to anthropogenic activity in the valley. This is a priority issue because this aquifer supplies drinking water, and in the short or medium term it will have an effect on public health.

PM2.5-bound trace metals in an urban area of Northern Mexico during the COVID-19 pandemic: characterization, sources, and health risk.

Abstract: A field study was carried out in the Metropolitan Area of Monterrey (MAM), the second most populated city in Mexico, characterized by increasing urbanization, high traffic density, and intense industrial activity. These characteristics commonly present high concentrations of air pollutants leading to the degradation of air quality. PM2.5 was analyzed for heavy metals at two urban sites located within the MAM (Juarez and San Bernabe) in order to determine sources, health risk, morphology, and elemental content during the COVID-19 pandemic (autumn 2020 and spring 2021). Twenty-four-hour samples of PM2.5 were collected at each site during 30-day periods using high-volume equipment. Gravimetric concentrations and 11 metals were measured (Ca, Cd, Co, Cu, Fe, K, Mg, Mn, Ni, Cr, and Pb) by different analytical techniques (flame atomic absorption spectroscopy, graphite furnace atomic absorption spectroscopy, and inductively coupled plasma optical emission spectroscopy). Selected samples were analyzed by scanning electron microscopy-energy-disperse spectroscopy in order to characterize their morphology and elemental content. PM2.5 concentrations exceeded the Mexican standard and WHO guidelines in Juarez during spring 2021. Cu, Cd, and Co were highly enriched by anthropogenic sources, and Ni, K, Cr, and Pb had a moderate enrichment. Mg, Mn, and Ca were of crustal origin. Bivariate statistics and PCA confirmed that alkaline metals originated from crustal sources and that the main sources of trace metals included traffic emissions, resuspension from soil/road dust, steel industry, smelting, and non-exhaust emissions at both sites. Lifetime cancer risk coefficients did not exceed the permissible levels established by EPA and WHO, implying that local residents are not at risk of developing cancer. Non-carcinogenic risk coefficients revealed that there is a possible risk of suffering cardiovascular and respiratory diseases due to inhalation of cobalt at the study sites. Supplementary Information: The online version contains supplementary material available at 10.1007/s11869-023-01372-7.

Extended vertical rectus abdominis myocutaneous flap for reconstruction of large pelviperineal defects following oncologic resection.

BACKGROUND AND OBJECTIVES: Extended vertical rectus abdominis myocutaneous (eVRAM) flap has been proposed for reconstruction of large pelviperineal defects where traditional VRAM flap is insufficient. We present our experience with eVRAM flap for pelviperineal reconstruction following oncologic resection. METHODS: A retrospective study was conducted, including all the patients who underwent reconstruction with eVRAM flap after complex pelvic resection, between 2012 and 2020. EVRAM flap was indicated when traditional VRAM was considered deficient to cover or reach the skin defect or to fill the dead space. RESULTS: Forty-four patients were included in the study. Successful reconstruction with eVRAM flap was achieved in 40 patients. There were three flap failures, and one patient died in the second postoperative day because of multiple organ failure. Perineal wound complications occurred in 17 patients (38.6%), eight of them requiring surgical reoperation. Donor site problems were present in five patients (11.4%), and only one patient required surgical closure because of a major dehiscence. CONCLUSIONS: The authors found the eVRAM flap to be a useful and reliable flap for reconstruction of complex pelviperineal wounds, with a low rate of donor site morbidity.

Seasonal and Diurnal Variations of BTEX in Ambient Air from a Site Impacted by the Oil Industry in Southeast Mexico.

Atmospheric concentrations of BTEX were measured in an urban site located in the vicinity of an oil storage-distribution facility in Paraiso, Tabasco, Mexico. Samples were collected during two seasons (nortes 2018 and dry 2019). The relative abundance of BTEX mean concentrations was: toluene (5.24 µg m-3) > ethylbenzene (3.92 µg m-3) > m, p-xylene (3.89 µg m-3) > benzene (2.43 µg m-3). BTEX concentrations had a clear diurnal and seasonal pattern, showing higher levels during the dry season due to differences in wind conditions, rainfall patterns and temperature. Statistical analysis showed significant positive correlations among BTEX, indicating that these compounds had common sources. Interspecies ratios revealed that BTEX were originated from sources beyond vehicular traffic and that they were influenced by the transport of local air masses. The assessment of lifetime cancer risk showed that the population in the study area is at possible risk of developing cancer.

Metodologias ativas de ensino-aprendizagem e educação popular: encontros e desencontros no contexto da formação dos profissionais de saúde / Active teaching-learning methodologies and popular education: agreements and disagreements in the context of health professionals’ education / Metodologías activas de enseñanza-aprendizaje y educación popular: encuentros y desencuentros en el contexto de la formación de los professionales de salud

Trata-se de reflexão acerca dos encontros e desencontros entre as metodologias pedagógicas ativas e a educação popular, no contexto da formação dos profissionais de saúde. Parte-se de uma reflexão acerca das bases epistemológicas da educação popular e das principais metodologias ativas, consideradas no contexto de sua utilização na formação dos profissionais de saúde. A educação popular propõe uma fusão radical entre os meios e fins pedagógicos, já que a conscientização é ao mesmo tempo metodologia e objetivo formativo. As metodologias ativas podem ser métodos identificados com um processo pedagógico centrado no aluno e produtor de autonomia, desde que não sejam utilizadas como métodos isolados, dentro de uma lógica utilitária característica da educação bancária. Neste sentido, conclui-se que a educação popular pode ser um importante analisador das metodologias ativas, ajudando a consolidar sua utilização em processos formativos libertadores, no contexto dos cursos de saúde...

This study reflects the similarities and differences between the active teaching-learning methodologies and popular education in the training of health professionals. Moreover, it reflects the epistemological foundations of popular education and the core active teaching-learning methodologies considered in the context of its use in the training of health professionals. Popular education proposes a radical fusion between the media and education because awareness is both an aim and a method of training. Under different circumstances, although identified with a student-centered pedagogical process and autonomy motivation, the active methods can be used in isolation with a utilitarian logic, which is a characteristic of banking education. Thus, popular education can be an important analyzer of active methodologies in the context of health courses, facilitating to consolidate their use in liberating formative processes...

Reflexión sobre la relación entre las metodologías activas de enseñanza y la educación popular en la formación de profesionales de salud. Se parte de una reflexión sobre los fundamentos de la educación popular y las principales metodologías activas consideradas en el contexto de su utilización en la formación de los profesionales de salud. La educación popular propone una fusión entre los medios y fines educativos, ya que la conciencia es a la vez objetivo y metodología de entrenamiento. Aunque los métodos activos se identifiquen con un proceso pedagógico centrado en el estudiante y puedan producir autonomía, pueden ser utilizados como métodos aislados, dentro de la lógica utilitaria de la educación bancaria. Se concluye que la educación popular puede ser un analizador importante de las metodologías activas, consolidando su uso en los procesos formativos libertadores de los cursos de salud...

Self-medication and adherence to treatment in psoriasis.

BACKGROUND: Self-medication and non-adherence to treatment are very common practice. This often implies bad results for the patients, as well as for the physicians. Several studies suggest that up to 30-40% of the population is non-adherent to treatments. This problem generates 5% of all hospitalizations, having caused about 45,000 deaths in 2007 in Argentina. MATERIALS AND METHODS: A 21-question survey was carried out among 176 patients with psoriasis in the Psoriasis Center at the Fernandez Hospital in Buenos Aires, Argentina. RESULTS: Seventy-seven percent of the patients were non-adherent to treatment, and 33% were self-medicated. The two groups combined accounted for 82% of the population studied. We found no significant differences among the variables studied in either the non-adherence or the combined group, although males comprised 67% and females 33% of the self-medicated group, and that difference was statistically significant (P<0.025). CONCLUSIONS: Self-care is a very complex behavior to be explained by a single cause, which clearly makes it a multifactorial problem. In our view, patient education, the physician-patient relationship, and availability of more effective therapeutic options would be significant factors in modifying a deep-rooted behavior pattern.

[Contact lens in children: epidemiological aspects]. / Lente de contato em crianças: aspectos epidemiológicos.

PURPOSE: To describe the epidemiology of children submitted to contact lens fit. METHODS: Retrospective study of 73 children that had been submitted to contact lens fit at the "Universidade Federal de São Paulo". This study analyzed sex distribution, age, diagnosis, indications and contact lens fitted at first examination. RESULTS: 34 children (46.6%) were male and 39 (53.4%) female, aged between 2 and 12 years with mean of 10.2 and standard deviation of 2.42. The most common diagnosis was aphakia, in 16 (21.9%) cases. Keratoconus was present in 14 (19.1%), leucoma in 11 (15%), anisometropia in 10 (13.7%), refractive errors in 9 (12.3%), irregular astigmatism in 7 (9.5%), ectopia lentis in 4 (5.4%), high myopia in one case (1.3%) and one child (1.3%) had no ocular pathology, just wishing to change eye color. 52 (71.2%) had medical indication, 9 (12.3%) had optical indication and 12 (16.4%) had cosmetic indication. Contact lenses were fitted in 103 eyes, the most tested lens was rigid gas permeable in 43 (41.7%), soft lens in 41 (39.8%) and cosmetic soft lens in 11 (10.6%). CONCLUSION: Aphakia was the most common diagnosis among children in use of contact lens. The incidence of medical indication was higher than the others and the most tested lens was the rigid gas permeable one.

Lente de contato em crianças: aspectos epidemiológicos / Contact lens in children: epidemiological aspects

OBJETIVO: Traçar o perfil epidemiológico de crianças encaminhadas para adaptação de lente de contato. MÉTODOS: Foi realizado estudo retrospectivo de pacientes registrados no Setor de lente de contato da Universidade Federal de São Paulo. Os pacientes com até 12 anos de idade foram avaliados quanto ao sexo, idade, diagnóstico, indicação e tipo de lente de contato testada na primeira consulta. RESULTADOS: Dos 73 prontuários avaliados, 34 (46,6 por cento) pertenciam a crianças do sexo masculino e 39 (53,4 por cento) a crianças do sexo feminino. A idade variou de 2 a 12 com média de 10,2 e desvio-padrão de 2,42 anos. O diagnóstico mais encontrado foi afacia em 16 (21,9 por cento) crianças, seguido de ceratocone em 14 (19,1 por cento), leucoma em 11 (15 por cento), anisometropia em 10 (13,7 por cento), ametropia em 9 (12,3 por cento), astigmatismo irregular em 7 (9,5 por cento) e ectopia lentis em 4 (5,4 por cento). Uma criança era alta míope (1,3 por cento) e outra emétrope (1,3 por cento) que possuía desejo de usar lente de contato estética. Em relação às indicações, 52 (71,2 por cento) pacientes tinham indicação médica, 9 (12,3 por cento) indicação óptica e 12 (16,4 por cento) indicação cosmética. Foram testadas lentes em 103 olhos sendo as mais testadas a rígida gás permeável esférica em 43 (41,7 por cento), a gelatinosa esférica em 41 (39,8 por cento) e a gelatinosa cosmética em 11 (10,6 por cento). CONCLUSÃO: O perfil epidemiológico dos usuários de lente de contato nessa faixa etária tem como diagnóstico mais prevalente a afacia, a indicação mais freqüente a de ordem médica e a lente mais testada a rígida gás permeável esférica.

PURPOSE: To describe the epidemiology of children submitted to contact lens fit. METHODS: Retrospective study of 73 children that had been submitted to contact lens fit at the "Universidade Federal de São Paulo". This study analyzed sex distribution, age, diagnosis, indications and contact lens fitted at first examination. RESULTS: 34 children (46.6 percent) were male and 39 (53.4 percent) female, aged between 2 and 12 years with mean of 10.2 and standard deviation of 2.42. The most common diagnosis was aphakia, in 16 (21.9 percent) cases. Keratoconus was present in 14 (19.1 percent), leucoma in 11 (15 percent), anisometropia in 10 (13.7 percent), refractive errors in 9 (12.3 percent), irregular astigmatism in 7 (9.5 percent), ectopia lentis in 4 (5.4 percent), high myopia in one case (1.3 percent) and one child (1.3 percent) had no ocular pathology, just wishing to change eye color. 52 (71.2 percent) had medical indication, 9 (12.3 percent) had optical indication and 12 (16.4 percent) had cosmetic indication. Contact lenses were fitted in 103 eyes, the most tested lens was rigid gas permeable in 43 (41.7 percent), soft lens in 41 (39.8 percent) and cosmetic soft lens in 11 (10.6 percent). CONCLUSION: Aphakia was the most common diagnosis among children in use of contact lens. The incidence of medical indication was higher than the others and the most tested lens was the rigid gas permeable one.

Fatores de risco cardiovascular - Perfil clínico e epidemiológico dos participantes do projeto Atividade Física na Vila / Cardiovascular Risk Factors - Clinical and Epidemiologic profiles in the subjects of the "Atividade Física na Vila" Project

As doenças cardiovasculares aterotrombóticas representam uma das principais causas de morte no mundo. A aterosclerose é uma patologia de origem multifatorial com grande dependência genética e familiar, que apresenta elevada suscetibilidade de agravamento, segundo o estilo de vida. Nosso objetivo foi descrever as prevalências dos fatores de risco cardiovascular (RCV) e da Síndrome Metabólica (SM), além de estimar o RCV nos participantes do projeto Atividade Física na Vila. Mediante estudo de corte seccional, 48 pacientes entre 23 e 74 anos (41 mulheres e 7 homens), foram avaliados quanto à presença de sedentarismo, tabagismo, história familiar de diabetes mellitus tipo 2 (DM2) ou doença arterial coronariana, obesidade, obesidade abdominal, hipertensão arterial (HA), DM2, glicemia de jejum alterada (GjA), dislipidemia e SM. As prevalências dos fatores de risco foram comparadas com os dados disponíveis para a população geral. A SM foi definida pelos critérios da NCEP. O RCV foi estimado pelo Escore de Framingham (EF) e comparado entre os participantes com e sem SM. Dos pacientes, 67% tinham mais de 50 anos e 46%, mais de 55. Houve alta prevalência dos fatores de RCV comparando-se aos dados populacionais, destacando-se sedentarismo (52% x 56%; NS), obesidade (homens 14% x 9%; NS; mulheres 39% x 13%; p<0,05), HA (56% x 32%; p<0,05) e hipercolesterolemia (63% x 40%; p<0,05). As prevalências de DM, GjA, obesidade abdominal e SM foram de 10%, 21%, 60% e 27%, respectivamente. O EF foi de 5,2 ± 5,5, sendo significativamente maior nos pacientes com SM (9,5 ± 3,1x 3,5 ± 5,4; p<0,05). Esses dados evidenciam a alta prevalência dos fatores de risco e sugerem sua ação sinérgica no aumento do RCV global representado pelo EF e a necessidade das mudanças no estilo de vida desses pacientes.

The group of atherothrombotic cardiovascular diseases represents one of the leading causes of death around the world. Atherosclerosis is a condition of multifactorial origin, with great genetic and familiar dependence, besides being characterized by an elevated aggravation trend related to lifestyle. Our objective was to describe the prevalence of cardiovascular risk (CVR) factors and Metabolic Syndrome (MS), as well as to estimate the cardiovascular risk in the subjects of the "Atividade Física na Vila" Project. By means of a cross sectional study, 48 patients aged between 23 and 74 (41 women and 7 men) were screened for the presence of sedentary lifestyle, smoking, family antecedents of Diabetes mellitus type 22 (DM) or Coronary artery disease, obesity, abdominal obesity, High Blood Pressure (HBP), DM2, Impaired Fasting Glucose (IFG), Lipid abnormalities, and MS. This prevalence was compared to the available general population data. The MS definition was that of the NCEP. The CVR was estimated using the Framingham Score (FS), and compared among the groups with and without MS. 67% of the patients were 50 or older and 46% were 55 or older. There was a high prevalence of CVR factors compared to the population data, specially in the case of sedentary lifestyle (52% x 56%, NS), obesity (men 14% x 9%, NS; women 39% x 13%, P<0.05), HBP (56% x 32%, P<0.05), high total cholesterol (63% x 40%, P<0.05). The prevalence of DM2, IFG, abdominal obesity and MS was 10%, 21%, 60% and 27%, respectively. The mean FS was 5,2 ± 5,5, significantly higher in the patients with MS (9,5 ± 3,1 x 3,5 ± 5,4 p<0.05). These data indicate the high prevalence of CVR factors, and suggest its synergy in elevating the global CVR represented by the FS, as well as strongly support the need for changes in the lifestyle of these patients.

La extubación inmediata en el quirófano como conducta de primera elección después de cirugía cardíaca en adultos / Is routine immediate extubation after cardiac surgery the best option?

Antecedentes: En los últimos años ha habido una tendencia a modificar el manejo anestésico y el cuidado postoperatorio para facilitar una extubación más temprana en los pacientes sometidos a cirugía cardíaca; sin embargo, aún no existe consenso sobre el beneficio de la extubación inmediata en el quirófano. Objetivo: Evaluar la seguridad de una práctica rutinaria de extubación inmediata en el quirófano después de una cirugía cardíaca. Lugar de aplicación: Servicios de cirugía cardíaca y anestesiología. Diseño: Observacional longitudinal prospectivo. Población: 200 pacientes adultos sometidos a cirugía cardíaca. Método: Los pacientes se incorporaron a un protocolo de extubación temprana dentro del quirófano basado en una anestesia inhalatoria con mínimo uso de opiáceos y benzodiazepinas. Se evaluaron las tasas de extubación fallida, la necesidad de reintubación y la aparición de complicaciones mayores o muerte en el postoperatorio inmediato. Resultados: De 154 pacientes en condiciones de evaluar el cumplimiento de criterios de extubación, la misma pudo realizarse en 113 (73 por ciento) (riesgo de extubación fallida 0.27, IC95 por ciento 0.20-0.34). Cuando se comparó el grupo de operados "sin bomba" versus el grupo de operados con circulación extracorpórea se encontró una tasa menor de extubaciones fallidas en los primeros (RR = OAO, IC95 por ciento 0.19-0.85, P = 0.01). El 5.3 por ciento (6/113) de los pacientes extubados en el quirófano requirió reintubación dentro de las primeras 24 horas. Cuando se confrontó el grupo de extubados versus el de extubación fallida (n = 41) se encontró que las tasas de complicaciones fueron 19.5 por ciento (22/113) y 29.3 por ciento (12/41), respectivamente (RR = 0.67, IC95 por ciento 0.36-1.22, P = 0.28), y las de muerte 3.5 por ciento (4/113) y 14.6 por ciento (6/41) (RR = 0.24, IC95 por ciento 0.06-0.81, P = 0.02). Las tasas de complicaciones y muerte en el grupo control que no fue incluído entre el grupo con intención de extubar fueron 17.5 por ciento (7/40) y 5 por ciento (2/40); la comparación con las tasas del grupo de pacientes extubados resultó en un RR = 1.31, IC95 por ciento 0.60-2.85, P = 0.64 para las complicaciones, y en un RR = 0.71, IC95 por ciento 0.13-3.72, P = 0.65 para las muertes. Conclusiones: El uso de una técnica anestésica basada en agentes inhalatorios y bajas dosis de opiáceos permitió la extubación en el quirófano de alrededor del 70 por ciento de los pacientes... (TRUNCADO) (AU)

La extubación inmediata en el quirófano como conducta de primera elección después de cirugía cardíaca en adultos / Is routine immediate extubation after cardiac surgery the best option?

Antecedentes: En los últimos años ha habido una tendencia a modificar el manejo anestésico y el cuidado postoperatorio para facilitar una extubación más temprana en los pacientes sometidos a cirugía cardíaca; sin embargo, aún no existe consenso sobre el beneficio de la extubación inmediata en el quirófano. Objetivo: Evaluar la seguridad de una práctica rutinaria de extubación inmediata en el quirófano después de una cirugía cardíaca. Lugar de aplicación: Servicios de cirugía cardíaca y anestesiología. Diseño: Observacional longitudinal prospectivo. Población: 200 pacientes adultos sometidos a cirugía cardíaca. Método: Los pacientes se incorporaron a un protocolo de extubación temprana dentro del quirófano basado en una anestesia inhalatoria con mínimo uso de opiáceos y benzodiazepinas. Se evaluaron las tasas de extubación fallida, la necesidad de reintubación y la aparición de complicaciones mayores o muerte en el postoperatorio inmediato. Resultados: De 154 pacientes en condiciones de evaluar el cumplimiento de criterios de extubación, la misma pudo realizarse en 113 (73 por ciento) (riesgo de extubación fallida 0.27, IC95 por ciento 0.20-0.34). Cuando se comparó el grupo de operados "sin bomba" versus el grupo de operados con circulación extracorpórea se encontró una tasa menor de extubaciones fallidas en los primeros (RR = OAO, IC95 por ciento 0.19-0.85, P = 0.01). El 5.3 por ciento (6/113) de los pacientes extubados en el quirófano requirió reintubación dentro de las primeras 24 horas. Cuando se confrontó el grupo de extubados versus el de extubación fallida (n = 41) se encontró que las tasas de complicaciones fueron 19.5 por ciento (22/113) y 29.3 por ciento (12/41), respectivamente (RR = 0.67, IC95 por ciento 0.36-1.22, P = 0.28), y las de muerte 3.5 por ciento (4/113) y 14.6 por ciento (6/41) (RR = 0.24, IC95 por ciento 0.06-0.81, P = 0.02). Las tasas de complicaciones y muerte en el grupo control que no fue incluído entre el grupo con intención de extubar fueron 17.5 por ciento (7/40) y 5 por ciento (2/40); la comparación con las tasas del grupo de pacientes extubados resultó en un RR = 1.31, IC95 por ciento 0.60-2.85, P = 0.64 para las complicaciones, y en un RR = 0.71, IC95 por ciento 0.13-3.72, P = 0.65 para las muertes. Conclusiones: El uso de una técnica anestésica basada en agentes inhalatorios y bajas dosis de opiáceos permitió la extubación en el quirófano de alrededor del 70 por ciento de los pacientes... (TRUNCADO)

Tumor de Celulas da Granulosa Juvenil - Relato de Caso em Atenção Primária / Granulosa Juvenile Cell Tumor - Case Report in Primary Care / Tumor de Celulas de la Granulosa Juvenil - Relato de Caso en Atención Primaria

Os autores relatam o caso de urna criança de 2 anos e 4 meses com queixas ginecológicas (secreção vaginal branca), dor abdominal difusa e pseudopuberdade precoce (telarca). Iniciada investigação em Unidade de Saúde PSF de Porto Alegre, sendo referenciada ao nível secundário onde foi diagnosticada neoplasia ovariana (Tumor de Células da Granulosa Juvenil).

The authors report the case of a 2 year and 4 month old child with gynecological complaints (white vaginal secretion), diffuse abdominal pain and early pseudopuberty (telarch). Initiated research in PSF Health Unit of Porto Alegre, being referred to the secondary level where it was diagnosed ovarian neoplasia (Tumor of cells of the Granulosa Juvenil).

Los autores relatan el caso de un niño de 2 años y 4 meses con quejas ginecológicas (secreción vaginal blanca), dolor abdominal difuso y pseudopuberidad precoz (telarca). Se inició una investigación en Unidad de Salud PSF de Porto Alegre, siendo referenciada al nivel secundario donde fue diagnosticada neoplasia ovárica (Tumor de Células de la Granulosa Juvenil).

Reconstruction of the upper lip, columella and premaxilla with an extended Abbé flap: report of a case.

The resection of malignant tumours affecting the upper lip, columella, premaxilla and/or caudal septum requires reconstructive surgery, which does not always produce satisfactory results-either aesthetic or functional. We have designed a modification of the Abbé flap consisting of the extension of the distal portion of the latter over the chin, and the inclusion of a fragment of rib cartilage in this portion of the flap. The columella is reconstructed in this way, and the cartilage serves to buttress the pyramid tip and prevent its collapse. A case is reported, with good aesthetic and functional results. Other surgical procedures are discussed, analysing their advantages and inconveniences.

Nuevo emplazamiento aeropuertuario en la ciudad de Guayaramerin

Contenido: Cap.I. Introduccion: el departamento del Beni. La cuenca Ichilo-Mamore. Criterios para la eleccion de un aeropuerto. Aeropuerto actual. Nuevo emplazamiento. Cap.II. Analisis meteorologico: Vientos. Temperaturas. Precipitación. Humedad. Visibilidad-condiciones. Cap.III. Estudio del trafico aereo. Tráfico aereo probable de la zona. Analisis de la poblacion de Guayaramerin. El transporte aereo en Bolivia. El transporte aereo en Guayaramerin. Cap.IV. Diseño geometrico: Pista. Calles de rodaje. Calles de salida. Plataformas de estacionamiento. Ensanchamiento de cabezas de pista. Balizaje. Servicios aeroportuarios. Cap. V: Pavimentos: Suelos. Consideraciones para la elección del tipo de pavimento. Diseño de pavimentos flexibles. Diseño de pavimentos rigidos. Juntas de union de placas. Cap.VI: Drenaje: Consideraciones previas. Distribución de las probabilidades de las maximas precipitaciones diarias. Determinacion de la maxima altura de precipitacion en un punto A., en 24 horas consecutivas. Tiempo de concentración. Eñleccion de las obras hidraulicas. Calculo de caudales. Calculo de secciones de tubos. Cap.VII. Estimacion de costos al año 1980.