Reducción de la infección por Helicobacter pylori en pacientes derivados a endoscopia digestiva alta en Santiago de Chile entre 2010-2020 / Reduction in Helicobacter pylori infection among patients referred for upper gastrointestinal endoscopy in Santiago, Chile, between 2010-2020

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 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.

Implementación de la reforma curricular de la Escuela de Medicina de la Pontificia Universidad Católica de Chile: analizando la experiencia / Implementation of curricular changes at a medical school

The accelerated scientific, technological, and social advances in recent years have posed new challenges for professional training institutions, where universities play a leading role. Medical schools have not been oblivious to this process. This is how Pontificia Universidad Católica de Chile implemented in 2015 a curricular reform derived from the joint work of academics, students and graduates. For this purpose, a model consisting of stages was followed, including the identification of the problem, general assessment of needs, definition of purpose and learning objectives. We worked with surveys, focus groups and committees of academics and students to identify and map content within the mesh, review terminal learning objectives while creating and reviewing courses for the vertically and horizontally integrated delivery of content and competencies. The first cohort of the new curriculum entered in 2015, consisting of 126 students. The implementation required constant follow-up and monitoring, establishing changes and adjustments according to educational needs and unforeseen conditions such as the COVID-19 pandemic. The implementation process of the new curriculum has been positive, adjusting to the defined strategic planning and responding to unexpected events.

Percepción de estudiantes de pregrado de Medicina de talleres de simulación de procedimientos médico-quirúrgicos / Undergraduate student's perception of clinical simulation workshops: assessment of an instrument

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.

Diseño e implementación de un modelo de enseñanza en ambiente simulado de paracentesis abdomina / Design and implementation of an environment teaching model simulated abdominal paracentesis

Resumen: El aprendizaje de los estudiantes de Medicina de Pregrado en ambiente simulado constituye una alternativa en la obtención de competencias técnicas y no técnicas. Objetivo: Desarrollar un fantoma e implementar un taller modular de entrenamiento de paracentesis abdominal en ambiente simulado para estudiantes de Medicina. Métodos: Se diseñaron y desarrollaron modelos para la realización de paracentesis abdominal en la Escuela de Diseño de la Pontificia Universidad Católica de Chile (PUC) y se implementó un taller para alumnos de 4to año de Medicina de la PUC, utilizando un enfoque constructivista, sesiones de entrenamiento simulado con debriefing basadas en el modelo plus-delta y evaluación pre y post-procedimiento siguiendo los principios de evaluación para el aprendizaje. Resultados: Se desarrollaron 3 prototipos hasta llegar a un modelo definitivo de alta fidelidad basado en la percepción de 20 expertos. 237 alumnos asistieron a un taller de paracentesis abdominal en el Centro de Cirugía Experimental y Simulación Universidad Católica (UC). Este consistió en una actividad práctica grupal (7-8 alumnos por sesión) que incluyó: una evaluación pre-sesión, un vídeo instruccional, una demostración en tiempo real en el fantoma por parte de un docente, la realización guiada del procedimiento por parte de los alumnos, debriefing y cierre de la sesión. Conclusiones: Un modelo de enseñanza en ambiente simulado es posible de ser diseñado e implementado exitosamente en un centro educacional para estudiantes de Medicina de Pregrado. Este taller de paracentesis permite entrenar a los alumnos en la realización de paracentesis abdominal en un ambiente seguro para los alumnos y pacientes y puede ser implementado a bajo costo en otros centros o instituciones. (AU)

Abstract: Simulated environments are an option in the learning process of undergraduate medical students in order to obtain technical and non-technical. Aim: To develop a mannequin for abdominal paracentesis and the implementation of a training workshop to perform abdominal paracentesis in a simulated environment for undergraduate medical students. Methods: The prototypes were designed and developed to perform abdominal paracentesis at the School of Design at the Pontificia Universidad Católica de Chile (PUC) and a workshop was implemented in a course with 4-year medical students at the PUC, using a constructivist approach and simulated training sessions and providing debriefing (based on plus-delta model) and pre-post training assessment following the principles of Assessment for Learning. Results: Three prototypes were developed until the final high-fidelity-mannequin was achieved. The abdominal paracentesis workshop was attended by 237 students at the Universidad Católica (UC) Experimental Surgery and Simulation Center. This was a hands-on group activity (7-8 students per session) including pre-session assessment, instructional video-tape, real-time demonstration of abdominal paracentesis procedure by the clinical teacher, followed by abdominal paracentesis performed by the students, debriefing and closing session. Conclusions: A teaching model in a simulated environment is feasible to be successfully designed and implemented in an educational center for undergraduate medical students. This workshop allows students training process to perform abdominal paracentesis in a safe environment for students and patients and it can be implemented in other centers or institutions with low cost.(AU)

Evaluación para el aprendizaje: experiencia en un curso teórico de pregrado en medicina / Assessment for learning: experience in an undergraduate medical theoretical course

Background: Assessment for learning is a paradigm that is taking shape in the field of medical education. This approach aims to embed the assessment process within the educational and learning process. Aim: To evaluate the impact of curricular changes, from a focus of assessment of learning to one of assessment for learning, in the perception of undergraduate students of medicine and their final grades obtained in a theoretical course (TCG). Material and Methods: In the year 2011 lectures were reduced and intermediate assessments followed by a feedback session were introduced. The activities of each program course, surveys about student perceptions of the course and the final grades of students (assessments with multiple choice questions) were compared between the periods prior and after curricular changes (2005-2010 and 2011-2013). Results: As a consequence of curricular changes, time for lectures was reduced by 19.5%, time for summative assessments was increased by 8.5%, and feedback activity, occupying 7.3% of the course time was added. There were significant improvements in student is perceptions in all areas assessed by surveys, emphasizing feedback and assessments. The overall grade assigned to the course dictated after implementing the changes increased from 6.18 to 6.59 (p < 0.001, 1-7 scale). The grades of students also improved from an average of 5.78 to 6.43 (p < 0.001, 1-7 scale). Conclusions: Assessment for learning achieved the desired educational impact without increasing the assigned curricular time. Programmatic assessment is favorably perceived by students.

Experiencias en la implementación de un programa de formación en docencia para profesores de medicina en una Universidad de Chile / Experiences in the implementation of a faculty development program for teching for professors of a University of Medicine in Chile

Objetivos. Describir la experiencia y resultados de la implementación de un programa de formación en docencia para profesores de Medicina del Diplomado en Educación Médica, desarrollado en la Escuela de Medicina de la Pontificia Universidad Católica de Chile. Materiales y métodos. Estudio descriptivo, transversal, de carácter cuantitativo y cualitativo. La población estuvo compuesta por todos los graduados del programa hasta el 2011. Se aplicó un cuestionario con preguntas abiertas y cerradas explorando diferentes niveles de impacto, utilizando el modelo de evaluación de Kirkpatrick. Resultados. Sobre el 97% expresó un alto grado de satisfacción (nivel 1 Kirkpatrick). La mayoría reportó cambios en el aprendizaje de conocimientos y competencias docentes (nivel 2 Kirkpatrick) con diferencias pre y posretrospectivas estadísticamente significativas. El 93% refirió haber mejorado globalmente su desempeño docente y sobre el 85% en desempeños específicos (nivel 3 Kirkpatrick). En el nivel 4 de Kirkpatrick, la mayoría percibió un incremento del interés por la docencia y 69% reconoció una mayor valoración a nivel institucional. Del análisis cualitativo emergieron cinco categorías: valoración de la docencia y de la formación en docencia, relevancia de las habilidades docentes, aporte de la docencia al rol profesional, contribución al desarrollo personal y fortalecimiento de la comunidad académica. Conclusiones. Los efectos de este programa de formación en educación médica han sido positivos. Los profesores de Medicina, además de perfeccionar sus desempeños docentes, perciben cambios en el desarrollo personal, en su rol de médico, en la comunidad académica y en la institución...

Objectives. To describe the experience and results of the implementation of a faculty development program for professors of Medicine in the Medical Education Certificate program developed at the School of Medicine, Pontificia Uniersidad Catolica de Chile. Materials and methods. This was a descriptive, cross-sectional, quantitative and qualitative study. The population consisted of all graduates of the program until 2011. A questionnaire with open and closed-ended questions was applied, exploring different levels of impact using the Kirkpatrick evaluation model. Results. Over 97% expressed a high degree of satisfaction (Kirkpatrick level 1). Most respondents reported changes in learning, knowledge and teaching skills (Kirkpatrick Level 2) with statistically significant differences in retrospective pre-post questionnaires 93% reported having improved their teaching performance generally, and 85% in a specific performance (Kirkpatrick Level 3). At level 4 of the Kirkpatrick evaluation model, most perceived an increased interest in teaching and 69% reported being valued more highly at the institutional level. Five categories emerged from the qualitative analysis: value given to teaching and of training in teaching, importance of teaching skills, the contribution of teaching to the professional role, contribution to personal development and strengthening of the academic community. Conclusions. The effects of this faculty development program in medical education have been positive. Professors of Medicine, in addition to improving their teaching performance, perceived changes in personal development, in their role as physicians, in the academic community and in the institution...

Logros más alla de los objetivos: evaluación cualitativa de un programa de formación en educación médica / Impact beyond the objectives: a qualitative study of a faculty development program in medical education

Background: In medical education there has been increasing emphasis on faculty development programs aimed at the professionalization of teaching and increasing students' learning. However, these programs have been shown to have an impact beyond improvement in teaching skills. The medical school of the Pontificia Universidad Católica de Chile (EMUC) has been running a faculty development program (DEM) since 2000. Aim: To explore the perception of graduates on the effects of having participated in DEM on their development as teachers and clinicians. Material and Methods: Using an exploratory, descriptive and qualitative design, the 79 teachers who graduated from DEM from 2004-2008 were sent a questionnaire containing three open questions. Their answers were analyzed using the Constant Comparative Method of Qualitative Analysis of Glaser and Strauss by four researchers. Results: Faculty development, becoming a better clinician, personal development, appreciation of the value of teaching and strengthening of the academic community were the five categories that emerged from the answers. Graduates felt that, besides learning new educational skills, they changed their attitude towards teaching. DEM was perceived as facilitating self-awareness and refection about the graduates' role as doctors and teachers. The graduates also valued meeting other faculty. Conclusions: Faculty development programs can have an impact far beyond the learning objectives. The planning and design of programs contributes to their wider impact. This should be taken into consideration in the design, planning, and evaluation of faculty development programs. Care should be taken to protect time for participation, refection and for interaction with other academics.

Barreras para la formación en docencia de los profesores de medicina: una aproximación cualitativa / Barriers for faculty development in medical education: a qualitative study

Background: Since 2000, the medical school of the Catholic University of Chile (EMUC) has offered courses for its faculty as part of a Diploma in Medical Education (DEM). However by 2009, 41% of faculty had never taken any courses. Aim: To explore the reasons why faculty choose not to participate in these courses. Material and Methods: Semi-structured interviews to seven faculty members, all of whom have an active role in teaching but who had not taken any DEM courses. The sampling was intentional and guided by theory. Based on Grounded theory, the data was analyzed using open, axial and selective coding. Results: Three categories emerged from the analysis. First, the characteristics of a "good teacher" and what it means to be a good teacher. Second, the current status of teaching. Third, the barriers to participate in courses of DEM. Non-attendance is multifactorial; teaching is seen as a natural skill that is difficult to be trained, teaching has a lower priority than other activities, and there are many barriers perceived for attendance. Conclusions: With these results we developed a model to explain the reasons why faculty choose not to participate in these courses. The lower value of teaching and the multiple roles that teachers have, are highlighted.

Desarrollo y validación de encuesta de percepción del portafolio en estudiantes de medicina de pregrado / Development and validation of a questionnaire on perception of portfolio by undergraduate medical students

Background: Portfolio is an innovative instrument that promotes reflection, creativity and professionalism among students. Aitn: To describe the development and validation process of a questionnaire to evalúate the use of portfolio in undergraduate medical students. Material andMethods: Focus groups with students and teachers were employed to identify aspects related with portfolio in undergraduate teaching. The Delphi technique was used to prioritize relevant aspects and construct the questionnaire. The validated questionnaire, consistingin 43 Ítems and 6factors, was appliedto 97students (response rote of99.9 percent) in2007and 100students (99.2 percent) in 2008. Each question had to be answered using a Likert scale,from 0 (completely disagree) to 4 (completely agree) The validity and reliability of the questionnaire was evaluated. Results: The questionnaire showed a high reliability (Cronbach alpha = 0.9). The mean total scores obtained in 2007 and 2008 were 106.2 ± 21.2 (61.7 percent ofthe maximal obtainable score) and 104.6 ± 34.0 (60.8 percent ofthe maximal obtainable score), respectively No significant differences were seen in the analysis by factors. Changes in portfolio during 2008 showed differences in Ítems related with organization, evaluation and regulation. Conclusions: The questionnaire is a valid and highly reliable instrument, measuringperceptions about the portfolio by undergraduate medical students. The students perceived an improvement in their creativity and professionalism as one ofthe strengths of portfolio. The weaknesses identified during the implementation process helped us to focus changes in organization and evaluation to improve the portfolio as a dynamic process.

Formación en educación de los docentes clínicos de medicina / Faculty development for clinicaI teachers in medicine

Effective clinical teaching is an imperative of medical education. Clinical teachers and faculty development initiatives as well as Medical Schools, need to focus their efforts to pursue common outcomes: effective learning in students, future competent physicians and healthy patients. Excellence in quality of teaching needs scholars in education. To achieve this objective, institutions must recruit a core of medical faculty according to its mission, define the attributes and teaching competences, implement faculty development programs, and finally, support academic vitality. This article describes the three main issues of medical teaching: faculty, faculty development and its organization.

Registro de incidencia de hepatitis crónica: Asociación Chilena de Hepatología: período 1994-1996 / Chronic hepatitis incidence record: Chilean Hepatology Association (1994-1996)

La Asociación Chilena de Hepatología creó un registro de casos nuevos de hepatitis crónicas diagnosticadas con biopsia hepática entre los años 1994 y 1996. Se registran y clasifican de acuerdo a su etiología 106 pacientes altamente seleccionados con hepatitis crónica provenientes de la regiones metropolitana, quinta y segunda. De acuerdo a la etiología: 13 por ciento criptogénicas y 7 por ciento Virus B. La presencia de cirrosis al diagnóstico fue de 30 por ciento para las de origen viral C y 24 por ciento para las de origen autoinmune lo que podría afectar la respuesta a las alternativas terapéuticas. De acuerdo a estos resultados, deberíamos promover el diagnóstico más temprano en pacientes con alteraciones de laboratorio asintomáticas o notificando a los donantes de sangre en los que detecta alguna infección viral. En ausencia de otras instancias que realicen este tipo de evaluaciones, sugerimos repetir o mantener registros en lo posible de cobertura nacional, tanto para los pacientes con hepatitis crónica como para otras patologías hepáticas.