ABSTRACT Latin America presents a high prevalence of Helicobacter pylori (Hp) infection. Between 1996-2003, the prevalence in Santiago, Chile, was 70%; recent studies indicate a decrease in this infection. Updating the frequency of Hp is crucial due to its associated health impact. Objective: Our objective was to describe the trend in Hp infection in patients undergoing ambulatory esophagogastroduodenoscopy (EGD) in a Chilean population. Materials and methods: A retrospective observational study was conducted on patients over 18 years old who attended a first EGD with a rapid urease test between 2010-2020. Time trends were described through time series analysis. A Poisson model was constructed to estimate the risk of infection, adjusted for age and gender. Results: 11,355 patients were included [66.9% females; mean age 52 years; Hp 41.6%]. Male gender presented a higher frequency of Hp infection [RR 1.13; (95% CI: 1.08-1.18)]. Hp frequency infection decreased significantly from 45.1% in 2010 to 29% in 2020, with a 36% lower probability of Hp infection in 2020 compared to 2010 [RR 0.64; (95% CI: 0.55-0.74)]. A progressive decline in Hp infection trend was projected, reaching values close to 25% by year 2025. Conclusion: A significant reduction in Hp infection was observed between 2010-2020. This decrease could be explained by the implementation of public health policies in the last decade associated with socio-sanitary changes.

RESUMEN Latinoamérica presenta una alta prevalencia de infección por Helicobacter pylori (Hp). Entre 1996-2003 la prevalencia en Santiago de Chile fue del 70%; estudios recientes presentan una disminución en esta infección. Actualizar la frecuencia de Hp es fundamental debido a su impacto en la salud asociado. Objetivo: Nuestro objetivo fue describir la tendencia de la infección por Hp en pacientes que asisten a endoscopía digestiva alta (EDA) ambulatoria en una población chilena. Materiales y métodos: Se realizó un estudio observacional retrospectivo de pacientes mayores de 18 años que asistieron a una primera EDA con test rápido de ureasa entre 2010-2020. La tendencia en el tiempo fue descrita mediante análisis de series de tiempo. Se construyó un modelo Poisson para estimar el riesgo de infección, ajustado por edad y sexo. Resultados: Se incluyeron 11 355 pacientes [66,9% mujeres; edad media 52 años; Hp 41,6%]. El sexo masculino presentó una mayor frecuencia de infección por Hp [RR 1,13; (IC95%:1,08-1,18)]. La frecuencia de Hp disminuyó significativamente desde 45,1% en 2010 hasta 29% en 2020, con 36% menor probabilidad de presentar infección por Hp en 2020 con respecto al 2010 [RR 0,64; (IC95%:0,55-0,74)]. Se proyectó un descenso progresivo en la tendencia de infección por Hp hasta valores cercanos al 25% para el año 2025. Conclusión: Se observó una reducción significativa en la infección por Hp entre los años 2010-2020. Esta disminución pudiese ser explicada mediante la incorporación de políticas públicas de salud en la última década asociadas a cambios sociosanitarios.

ABSTRACT: Introduction: Moderate, severe or deep infections of the maxillofacial territory (IMT) are a relevant problem in hospital centres. Objective: To demonstrate and update the epidemiology of IMT´s with surgical resolution under general Anesthesia in mayor operating rooms at the Public Assistance Emergency Hospital (HUAP) during the period from December 2014 to December 2019, and to compare it with the epidemiological reality of other hospital centres in Chile and abroad. Materials and Method: A retrospective study analyzed the operative protocols of patients for 60 months. Studied variables were age, sex, compromised anatomical space and clinical presentation. Results: 291 surgical procedures were performed to resolve 452 infections. The average age of the operated patients was 38 years, with a slight predominance of the male gender (57.3%); the most affected age range was between 30 and 39 years (26.1%); the submandibular space was the most compromised (29.5%). Discussion: The exposed results agree with studies carried out at national and international level. Conclusion: It is necessary to continue an epidemiological investigation in order to establish efficient prevention and treatment policies for each service and altogether to unify public health statistics.

RESUMEN Introducción: Infecciones moderadas, severas y/o profundas del territorio maxilofacial (ITM) constituyen un desafío de gran relevancia en los centros hospitalarios de alta complejidad. Objetivo: Actualizar esta epidemiología de resolución quirúrgica bajo anestesia general, en pabellón central tratado en el Hospital de Urgencia Asistencia Pública (HUAP) durante el período comprendido entre diciembre de 2014 a diciembre de 2019 y compararla con la realidad de otros centros hospitalarios de alta complejidad en Chile y en el extranjero. Materiales y Método: Estudio retrospectivo que analizó los protocolos operatorios de los pacientes intervenidos quirúrgicamente por ITM, en pabellón central, bajo anestesia general, en un período de 60 meses. Las variables analizadas fueron edad, género, espacio anatómico comprometido y presentación clínica. Resultados: Se realizaron 291 procedimientos quirúrgicos, para 452 infecciones. La edad promedio de los pacientes fue 38 años, con predominio del sexo masculino (57,3%); el rango de edad más afectado fue entre los 30-39 años (26,1%); el espacio submandibular fue el más comprometido (29,5%). Discusión: Los resultados expuestos concuerdan con estudios a nivel nacional e internacional. Conclusión: Resulta necesario continuar la investigación epidemiológica para establecer políticas de prevención y tratamiento eficientes en relación a cada servicio y en conjunto a nivel de salud pública.

Background: In a decade, we faced two pandemic viruses, influenza A H1N1pdm09 and SARS CoV-2, whose most serious manifestation is pneumonia. Aim: To compare the clinical, epidemiological and management aspects of pneumonias caused by each pandemic virus in adults requiring hospitalization. Material and Methods: Comparative, observational study carried out at a regional Chilean hospital, including 75 patients with influenza A H1N1pdm09 prospectively studied in 2009 and 142 patients with SARS-CoV-2 studied in 2020. Results: Patients with SARS-CoV-2 pneumonia were older (56 and 39.7 years respectively, p < 0.01) and had significantly more comorbidities. Cough, fever and myalgias were more frequent in influenza. Dyspnea was more frequent in COVID-19. Patients with COVID-19 had more extensive lung involvement and a longer hospitalization (13.6 and 8.6 days respectively, p = 0.01). There was no difference on ICU admission requirements and mortality attributable to pneumonia. Patients with influenza had greater APACHE scores and a higher frequency of a PaO2/FiO2 ratio ≤ 200. During COVID-19pandemic chest sean replaced x-ray examination. Also high-flow nasal cannulas and awake prone position ventilation were added as treatments. Conclusions: COVID-19 patients were older, had fewer classic flu symptoms but more dyspnea and longer hospitalization periods than patients with influenza.

ABSTRACT Background: Leishmaniasis is a vector-borne disease caused by a parasite protozoon from the genus Leishmania. Among the molecular techniques applied for detecting these parasites, real-time PCR with High Resolution Melting (PCR-HRM) proved advantageous since it simultaneously determines both the presence and species of the pathogen in one step, through amplification and later analysis of curves generated by melting temperature. Methods: Based on this molecular technique, the goal of this study was to estimate the PCR-HRM sensitivity for Leishmania spp. detection in different canine tissues by evaluating biological samples obtained from popliteal, submandibular, and pre-scapular lymph nodes, from bone marrow and ear pinnae of 28 stray dogs captured in the metropolitan area of Asunción (Paraguay). Results: The rk39 immunochromatographic test showed that 25/28 tested dogs (89%) presented antibodies against L. infantum. In 20/25 dogs that tested positive for rk39 (80%), it was possible to detect Leishmania spp. by PCR-HRM and determine that the species corresponded entirely to L. infantum. Regarding the analysis of different tissues, the parasite was detected in all popliteal lymph node samples, followed by high detection in submandibular (at 95%) and pre-scapular lymph nodes (at 90%), bone marrow (at 85%), and ear pinnae (at 85%). Conclusions: This study demonstrated that the use of real-time PCR-HRM using the molecular marker hsp70 was a highly sensitive method for simultaneously detecting and identifying Leishmania species in different tissues taken from infected dogs. In addition, the usefulness of ear pinnae as easily accessible tissue for molecular diagnosis was emphasized.

Aim: To describe the design and creation of a high-fidelity thoracic trauma surgery simulation model incorporating 3D printing technology using a cadaveric human torso as a model. Materials and Method: This is a descriptive study that aims to illustrate the creation process of a thoracic trauma surgery simulation model throughout the incorporation of prototypes and dynamic iteration technologies. Results: A high-fidelity reusable thoracic trauma surgery simulation model was created from the digitalization of a cadaveric torso using a computed tomography scan. Throughout digital reconstruction tools, the subcutaneous, muscular, and skeletal structures were modeled from images obtained before and after an anterolateral thoracotomy. Using 3D printing and synthetic materials, a high-fidelity thoracic cavity was built so that perfused and ventilated porcine heart and lungs could be placed. A thoracotomy patch for the anterolateral thoracotomy was designed in a reusable and low-cost fashion. This simulation model is suitable for high fidelity training in the surgical management of cardiopulmonary traumatic injuries. Conclusion: The described methodology allowed the creation of a simulation model for training and assessment of surgical skills in thoracic trauma. The main components of the simulation model are made from reusable materials, broadening access to low-cost, high fidelity training.

Resumen Objetivo: Presentar la elaboración de un simulador de trauma torácico de alta fidelidad elaborado mediante modelamiento e impresión 3D a partir de un torso humano cadavérico. Materiales y Método: Estudio descriptivo del desarrollo de un simulador de trauma torácico utilizando metodología centrada en el prototipado y la iteración basada en testeos. Resultados: Se elaboró un simulador reutilizable mediante la digitalización de un torso cadavérico utilizando tomografía computada. Se realizó una reconstrucción digital del torso diseñando los planos subcutáneos, muscular y óseo en base a las imágenes del paciente pre y postoracotomía anterolateral. Utilizando impresión 3D y materiales sintéticos, se elaboró la caja torácica para luego instalar un corazón y pulmón porcino ventilado y perfundido. Los parches de la toracotomía son reemplazables y de bajo costo. En conjunto, este simulador permite el entrenamiento en manejo de lesiones traumáticas cardiacas y pulmonares de alta fidelidad. Conclusión: La metodología presentada permite la creación de un modelo para el entrenamiento y evaluación de habilidades quirúrgicas en trauma torácico. Los elementos principales del simulador son reutilizables y permiten mantener bajos los costos del entrenamiento.

Introduction: Pneumomediastinum is defined as the presence of air or gas within the fascial planes of the mediastinum. It is usually a phenomenon secondary to traumatic perforations of the aerodigestive tract. Pneumomediastinum secondary to an orbital fracture is a rare event. And it is related to life-threatening complications such as pneumothorax, pneumopericardium and mediastinitis. Aim: To describe a case of pneumomediastinum secondary to an isolated orbital floor fracture and its medical-surgical management. Clinical case: A 42-year-old female patient who suffers trauma to the facial, cervical and thoracic regions, secondary development of a subcutaneous panfacial emphysema and pneumomediastinum, which resolves successfully. Discussion: Pneumomediastinum following an isolated orbital floor fracture is a very rare event. The air can descend along the fascial spaces to the mediastinum. In this sense, blowing your nose is a risk factor to develop this pathology. Conclusion: After a maxillofacial trauma, emphysema of the deep spaces of the head, neck and even the mediastinum can occur

Resumen Introducción: El neumomediastino se define como la presencia de aire o gas dentro de los planos fasciales del mediastino. Por lo general, es un fenómeno secundario a perforaciones traumáticas del tracto aerodigestivo. El neumomediastino secundario a una fractura orbitaria es un evento raro. Se asocia a complicaciones potencialmente mortales como el neumotórax, el neumopericardio y la mediastinitis. Objetivo: Describir un caso de neumomediastino secundario a una fractura aislada de piso orbitario y su manejo médico-quirúrgico. Caso clínico: Paciente de sexo femenino de 42 años que sufre traumatismo en regiones facial, cervical y torácica desarrollando secundariamente un enfisema subcutáneo panfacial y un neumomediastino, el cual se resuelve exitosamente. Discusión: El neumomediastino secundario a una fractura aislada de piso orbitario es un evento muy raro. El aire puede descender a lo largo de los espacios fasciales hasta el mediastino. En este sentido, sonarse la nariz es un factor de riesgo para desarrollar esta pa-tología. Conclusión: Ocurrido un trauma maxilofacial puede presentarse enfisemas de espacios profundos de la cabeza, cuello e incluso el mediastino.

Resumo O artigo pretende analisar as possíveis implicações da compreensão do período colonial ibero-americano em termos de hegemonia política. Esta preocupação decorre do livro editado por Pedro Cardim, Tamar Herzog, José Javier Ruiz e Gaetano Sabatini Polycentric Monarchies. How Did Early Modern Spain and Portugal Achieve and Maintain a Global Hegemony? (2012), em que os governos espanhol e português dos séculos XVI a XVIII são definidos como hegemonias. Essa designação não é caprichosa, mas é teoricamente baseada na dinâmica gramsciana de consenso e coerção. A partir disso, o artigo propõe que essa abordagem hegemônica tem ou pode ter efeitos importantes em pelo menos três áreas: em um nível teórico, ao estender temporal e espacialmente a noção de hegemonia; no nível histórico, na medida em que questiona a categoria de "colonial" e retoma o debate em torno dela, que diz respeito especialmente à historiografia e ao pensamento crítico latino-americano; e no nível literário, uma área na qual se propõe abordar textos coloniais não apenas como exercícios de dominação ou resistência, mas também como recursos negociadores.

Abstract The article aims to analyze the possible implications of understanding the Ibero-American colonial period in terms of a political hegemony. This concern arises from the book edited by Pedro Cardim, Tamar Herzog, José Javier Ruiz and Gaetano Sabatini Polycentric Monarchies. How Did Early Modern Spain and Portugal Achieve and Maintain a Global Hegemony? (2012), in which the Spanish and Portuguese governments of the 16th to 18th centuries are defined as hegemonies. This designation is not capricious, but is theoretically based on the Gramscian dynamic of consensus and coercion. Based on this notion, the paper proposes that this hegemonic approach has or can have important effects in at least three areas: at a theoretical level, as it extends temporally and spatially the notion of hegemony; at a historical level, insofar as it questions the category of "colonial" and resumes the debate around it, which especially concerns historiography and Latin American critical thinking; and at a literary level, an area in which it is proposed to address colonial texts not only as exercises of domination or resistance, but also as negotiating resources.

Resumen El artículo tiene por objetivo analizar las posibles implicancias de comprender el periodo colonial iberoamericano en los términos de una hegemonía política. Esta inquietud surge a raíz del libro editado por Pedro Cardim, Tamar Herzog, José Javier Ruiz y Gaetano Sabatini Polycentric Monarchies. How Did Early Modern Spain and Portugal Achieve and Maintain a Global Hegemony? (2012), en el cual los gobiernos español y portugués de los siglos XVI al XVIII son definidos como hegemonías. Esta designación no es antojadiza, sino que se sustenta teóricamente en la dinámica gramsciana de consenso y coerción. A partir de esto, el trabajo propone que este enfoque hegemónico tiene o puede tener efectos importantes en al menos tres ámbitos: a nivel teórico, en cuanto amplía temporal y espacialmente la noción de hegemonía; a nivel histórico, en la medida en que cuestiona la categoría de “colonial” y reanuda el debate en torno a ella, lo que toca especialmente a la historiografía y el pensamiento crítico latinoamericano; y a nivel literario, ámbito en el cual se propone abordar los textos coloniales no sólo como ejercicios de dominación o resistencia, sino también como recursos de negociación.

Abstract Objective: To compare the acquisition of basic procedural suture skills in medical students according to practical teaching by surgeons versus peers. Methods: Pre-experimental study before and after, a practical suture workshop was held for 46 eighth-semester medical students of the University of Concepción between November and December 2017. Participants were randomly distributed in such a way that half of them were trained by sub-specialists surgeons and the other by medical students (suture instructor). The continuous and discontinuous suture was evaluated on the biological model using the “the objective structured assessment of technical skills” (OSATS) scale. A satisfaction survey was applied at the end of the workshop. Results of the OSATS scale are compared before and after the workshop, SPSS24® was used for statistical analysis by Student’s t-test for independent samples, considering significant p < 0.05. Results: Both groups progressed significantly on the OSATS scale (13.0 vs. 26.0, p < 0.001 for surgeons and 16.8 vs. 27.9, p < 0.001 for suture instructors) when comparing pre- versus post-workshop results, respectively. The post-workshop results do not show significant differences. Conclusion: Participants acquire basic surgical suture skills evidencing significant progression and similar degree of satisfaction regardless of whether they are trained by subspecialist surgeons or trained peers.

Resumen Objetivo: Comparar la adquisición de habilidades básicas de sutura en estudiantes de medicina según la enseñanza práctica por cirujanos o por pares. Método: Estudio preexperimental antes y después. Se realizó un taller práctico de suturas para 46 estudiantes de medicina de octavo semestre de la Universidad de Concepción, entre noviembre y diciembre de 2017. Se distribuyó aleatoriamente a los participantes. La mitad de ellos fueron entrenados por cirujanos subespecialistas y la otra mitad por estudiantes de medicina (monitores de sutura). Se evaluaron la sutura continua y discontinua sobre un modelo biológico mediante la escala “The Objective Structured Assessment Of Technical Skills” (OSATS). Se aplicó una encuesta de satisfacción al finalizar el taller. Se comparan los resultados de la escala OSATS antes y después del taller. Se utilizó SPSS24â para el análisis estadístico mediante la prueba t de Student para muestras independientes, y se consideró significativo un valor de p < 0.05. Resultados: Ambos grupos progresaron significativamente en la escala OSATS al comparar los resultados antes y después del taller: 13.0 vs. 26.0 (p < 0.001) para cirujanos y 16.8 vs. 28.0 (p < 0.001) para monitores de sutura. Los resultados después del taller no presentan diferencias significativas. Conclusión: Los participantes adquieren habilidades básicas de sutura evidenciando una progresión significativa y similar grado de satisfacción independientemente de si son entrenados por cirujanos subespecialistas o por pares entrenados.

Aim: Our objective is to compare the effectiveness of tutoring taught by 6th versus 14th semester peer students in the acquisition of basic procedural skills in medical students. Materials and Method: Quasi experimental study, before and after. The intervention initially consists of a training workshop for suture monitors (SM) for two students of 6th and two students of 14th semester of medicine. Subsequently, a suture workshop taught by SM to 23 fourth-year medical students was implemented. Continuous and discontinuous suture was evaluated using the instrument: “Objective structured evaluation of technical skills” (OSATS) and satisfaction through a survey validated by experts. The results of pre and post intervention and student satisfaction are described and compared, according to the semester attended by the SM. Informed consent was applied. Excel® and SPSS24® were used for statistical analysis by Mann Whitney test. It was considered significant p < 0.05. Results: Both groups progressed significantly on the OSATS scale, group tutored by 6° semester SM: 18.1 vs 28,1 (p < 0.001) and group tutored by 14° semester SM: 15.5 vs 27,8 and (p < 0.001). The final scores did not they present significant differences. The intervention was well evaluated with 66 out of 68 points, without significant differences according to the semester coursed of the SM. Conclusion: Our experience shows that it is possible to use peer tutoring by trained tutors to teach surgical skills, regardless of whether the teaching is given by pairs of lower or higher courses, achieving significant progress and equivalent procedural performance, in addition to high satisfaction among students.

Resumen Objetivo: Nuestro objetivo es comparar la efectividad de la tutoría impartida por pares de 6° versus 14° semestre en la adquisición de habilidades procedimentales básicas en estudiantes de medicina. Materiales y Método: Estudio cuasi-experimental, antes y después. La intervención consta inicialmente de un curso de formación de monitores de sutura (MS) para dos estudiantes de 6° y dos de 14° semestre de medicina. Posteriormente se implementó un taller de sutura tutorizado por MS a 23 estudiantes de 8° semestre de medicina. Se evaluó sutura continua y discontinua mediante el instrumento: “The Objective Structured Assessment Of Technical Skills” (OSATS) y satisfacción mediante encuesta tipo Likert validada por expertos. Se describen y comparan los resultados pre y postintervención y satisfacción de los estudiantes, de acuerdo al semestre cursado del MS. Se aplicó consentimiento informado. Se utilizó SPSS24® para análisis estadístico mediante prueba de Mann Whitney. Se consideró significativo p < 0,05. Resultados: Ambos grupos progresaron significativamente en la escala OSATS, grupo tutorizado por MS de 6° semestre: 18,1 vs 28,1 (p < 0,001) y grupo tutorizado por MS de 14° semestre: 15,5 vs 27,8 (p < 0,001). Los puntajes finales no presentan diferencias significativas. La intervención fue evaluada con 66 de 68 puntos, sin diferencias significativas según el semestre cursado del MS. Conclusión: Nuestra experiencia muestra que es posible utilizar la tutoría por pares entrenados para la enseñanza de habilidades quirúrgicas, independientemente si la tutoría es impartida por pares de cursos inferiores o superiores, logrando un progreso significativo y un desempeño procedimental equivalente, además de una alta satisfacción entre los estudiantes.

Background: Continuing education is essential for health professions and online courses can be a good way for professional development. Aim: To describe the experience with online courses for continuing education in hepatology and gastroenterology and to analyze their educational impact. Material and Methods: A three years' experience in courses on liver diseases and digestive tract is described. Their curricular design, methodology, and the educational impact was analyzed using the four levels of the Kirkpatrick's model. Results: On average, there were 321 students per course (2015-2017). 94% were Chilean and 6% from abroad (20 countries). In the educational impact analysis, in level 1 “reaction”: 93% said that the course fulfilled their expectations and 92% would recommend it. In level 2 “learning”: 42% approved the courses. Level 3 “behavior” was not evaluated and level 4 “organizational change” highlighted that the traditional face-to-face continuing education model of Chilean Gastroenterology Society (SChG) changed to full distance model in these three courses, with 1284 students from South America, Asia and Europe, in a 3-years-period. Additionally, these programs were included in the Medical Society of Santiago (SMS) continuing education agenda. Conclusions: The alliance between the SMS and the SChG generated on line courses that meet the educational needs of physicians and medical students, with excellent results and student perception.

Background: A portfolio is a compilation of academic work that demonstrates student's knowledge, reflection and critical thinking. Aim: To describe the development and implementation of an undergraduate portfolio in the School of Medicine at the Pontificia Universidad Católica de Chile, its temporal evolution and its educational impact after 10 years of experience. Material and Methods: The development and implementation of a portfolio for 4th-year undergraduate medical student was analyzed. Its design, teaching and learning methodologies, results and perceptions of students and teachers were assessed. The educational impact was measured using Kirkpatrick's levels. Results: A total of 1,320 students participated between 2007 and 2017, supported by six teachers and 190 assistant-students. The portfolio included clinical cases, narrative medicine, palliative care and evidence-based medicine (EBM). The overall student's perception was positive, highlighting the development of critical analysis, clinical reasoning and professionalism. The delivery of feedback and learning assessment, allowed students to obtain excellent grades. There were only two cases of plagiarism reported. Fifteen EBM articles and two books with 52 narrative medicine essays were published. The greatest organizational impact of this teaching innovation, was that it evolved to become an established and continuous assessment instrument in 10 consecutive years. Conclusions: This portfolio is a project with a high educational impact, with a favorable perception by students and tutors, excellent results related to grades, stimulating both scientific writing and reflective practice.

Introduction: Suture techniques are considered the minimum of a medical examination and are fundamental in the practice of medicine. Currently, the students of the Universidad de Concepción do not have a formal instance to acquire these competences. Aim: To evaluate the validity of a training program for Suture Instructor (SI) students through the results obtained through a standardized assessment method, carried out in undergraduate students of medicine at the University of Concepción. Method: Preexperimental before and after study. A theoretical-practical intervention was carried out for six medical students of different semesters of the career, between the months of May and July 2017. It consisted of three modules: theoretical classes, practice in biological model and module in surgical pavilion supervised by subspecialists. Continuous and interrupted sutures were evaluated in the biological model using the “The Objective Structured Assessment of Technical Skills” (OSATS) scale. Results of the OSATS scale are described and compared before and after the course. Informed consent was applied. SPSS® was used for statistical analysis by Mann-Whitney test for non-parametric variables. It was considered significant p < 0.05. Results: All participants improved score on OSATS scale. The participants progressed significantly their results in the different OSATS scales (5.2 vs 8.8, p < 0.05 and 16.5 vs 27.2, p < 0.05) when comparing pre vs post intervention results respectively. Discussion: Our experience shows that it is possible to create an SI training workshop with excellent results for medical students, through a three phase training program, with theory classes, simulation and “in vivo” practice. It also constitutes the basis of future research that seeks to solve the lack of a formal program of teaching suture techniques to medical students of our university.

Resumen Introducción: Las técnicas de sutura básicas se consideran competencias mínimas de un egresado de medicina y son fundamentales en el ejercicio de la medicina general. Actualmente, los estudiantes de la Universidad de Concepción no poseen una instancia formal para adquirir estas competencias. Objetivos: Evaluar la validez de un programa de formación de alumnos monitores de sutura a través de los resultados obtenidos mediante un método de evaluación estandarizado, realizado en estudiantes de pregrado de medicina de la Universidad de Concepción. Metodología: Estudio preexperimental antes y después. Se realizó intervención teórico-práctica para seis estudiantes de medicina de distintos semestres cursados, entre los meses de mayo y julio de 2017. Consistió en tres módulos: clases teóricas, práctica en modelo biológico y módulo en pabellón quirúrgico supervisado por subespecialistas. Se evaluó punto de sutura continuo y discontinuo en modelo biológico mediante la escala “The Objective Structured Assessment Of Technical Skills” (OSATS). Se describen y comparan resultados de la escala OSATS antes y después del curso. Se aplicó consentimiento informado. Se utilizó SPSS® para análisis estadístico mediante prueba de Mann-Whitney para variables no paramétricas. Se consideró significativo p < 0,05. Resultados: Todos los participantes mejoraron puntuación en escala OSATS. Los participantes progresaron significativamente sus resultados en las distintas escalas OSATS (5,2 vs 8,8; p < 0,05 y 16,5 vs 27,2; p < 0,05) al comparar resultados pre vs posintervención respectivamente. Discusión: Nuestra experiencia demuestra que es posible crear un taller de formación de MS con muy buenos resultados, para estudiantes de medicina, a través de una capacitación trimodal, con clases teóricas, simulación y práctica in vivo. Además, constituye la base de futuras investigaciones que buscan solucionar la inexistencia de un programa formal de enseñanza de técnicas de sutura a los estudiantes de medicina de nuestra facultad.

Backgroud: Tuberculosis (TB) is still a problem that impacts on hospitals of high complexity. Aim: To assess demand for care and/or hospitalization because of TB in Puerto Montt Hospital (PMH), located in the southern of Chile. Patients and Methods: Retrospective study of all Reloncaví Health Service (RHS) and PMH clinical records, between 2011 and 2015. We include all ambulatory or hospitalized cases of active TB registered in PMH during the period of the study. Results: In RHS there were 298 cases of TB and 64% of them (192/298) was detected in HPM. We present social, economic, epidemiological, clinical, laboratory studies, and specific type of diagnosis of 180 cases that met inclusion criteria: men 62%, mean age 45 ± 19 years-old. The population with lower income was 72%, 4% homeless, 14% with complete high school, 11% illiterate and 19% lived at country side. Main co-morbidities were alcoholism 17%, HIV 12%, Diabetes Mellitus 10%. In the specific group of lung/pleural TB (128 cases) the time with symptoms was often prolonged (15% > 90 days) and imagen studies showed advanced pathology: bilateral infiltrates 73%>, affecting three or more lobes 55%, cavitations 34%. 71% (126/180) were hospitalized, because of necessity of more study (50%) or severity (48%), 8% required to enter to the Critical Care Unit (CCU). Twenty-four patients died (13%). Illiteracy and the need for CCU were associated with mortality. Conclusions: In RHS TB is a sanitary problem that affects principally the most poor and vulnerable populations.

Resumen Objetivo: Dimensionar la demanda de atención y/u hospitalización de la tuberculosis (TBC) en el Hospital de Puerto Montt (HPM). Método: Revisión retrospectiva de los registros de TBC del Servicio de Salud del Reloncaví (SSDR) y del HPM entre los años 2011 y 2015. Se incluyeron todos los casos de TBC activa vistos en forma ambulatoria u hospitalizada en el HPM. Resultados: Se diagnosticaron en el SSDR 298 casos de TBC, y de ellos un 64% (192/298) fue pesquisado en el HPM. Se presentan datos socioeconómicos, epidemiológicos, clínicos, de laboratorio y forma de diagnóstico de 180 casos, que cumplieron criterios de inclusión: varones 62%, edad media 44 ± 19 años. El 72% correspondieron al estrato social de menores ingresos, 4% indigentes, solo 14% poseía enseñanza media completa, 11% analfabetos, ruralidad 19%. Las principales co-morbilidades fueron alcoholismo (17%), VIH (12%), Diabetes (10%). En aquellos con TBC pulmonar o pleural (128) el tiempo con síntomas con frecuencia era prolongado (15% > 90 días) y la radiología mostraba enfermedad avanzada: infiltrados bilaterales 73%, compromiso > 3 lóbulos 55%, una o más cavitaciones 34%. Se hospitalizó el 71% (126/180), 50% por necesidad de estudio, 48%por gravedad. El 8% necesitó Unidad de Paciente Crítico (UPC). Fallecieron 24 pacientes (13%). Se asoció significativamente a mortalidad el analfabetismo y necesidad de UPC. Conclusiones: En el SSDR la TBC es un problema sanitario que afecta principalmente a poblaciones más pobres y vulnerables.

Background: Bacteremic pneumococcal pneumonia (BPP) is a preventable disease with high morbimortality. Aim: To evaluate clinical aspects and mortality on BPP patients admitted to a Chilean regional hospital. Patients and Methods: We looked for adult patients with Streptococcus pneumoniae isolated from blood cultures between 2010 and 2014 years and reviewed clinical records of those who were admitted with pneumonia. Results: We identified 70 BPP patients: 58% were men, mean age was 56 years, 30% were > 65 years, 70% with basic public health insurance, 26% were alcoholics, 86% had comorbidities. Only two patients were vaccinated against S. pneumoniae. CURB-65 severity index for community acquired pneumonia was > 3 in 37% of patients. Twenty-four patients were admitted to ICU, twenty required mechanical ventilation and twenty-four died (34%). Mortality was associated with an age over 65 years, presence of comorbidities and complications of pneumonia. A total of 22 serotypes of S. pneumoniae were identified, five of them (1,3,7F,14 y 9V) were present in 57% of cases. Conclusions: Elevated mortality of our BNN patients was associated with comorbidities and possibly with socio economic factors, which conditioned a late access to medical care.

Background: Simulation is a useful training tool for undergraduate medical students. A valid instrument is needed to assess students’ perception of simulation workshops. Aim: To adapt and validate an instrument to assess the undergraduate medical student’s perception of simulation workshops of clinical procedures. Material and Methods: Delphi Methodology was used to adapt the instrument. Exploratory and confirmatory analyses were performed to determine the construct validity and Cronbach’s Alpha (0 to 1) for internal consistency of the instrument. Results: A Delphi panel of 10 experts adapted a seven-item questionnaire (Likert scale 1-5; ranging from 7 to 35) and four open-questions. After 3-delphi-rounds, the instrument was administered to 210 students in six simulation training programs (Paracentesis, Cardiopulmonary Resuscitation, Airway management, Sutures, Thoracentesis and Nursing Procedures). The instrument was considered unidimensional in the factorial analysis. The overall median (Q1-Q3) score was 34 ranging from 32 to 35 and the Cronbach Alpha coefficient was 0.72, indicating a good reliability. Conclusions: The perception questionnaire is a useful and reliable instrument to assess students’ perceptions of clinical simulations.