Ajuste fino de un modelo de producción vocal para estimar el estrés de impacto utilizando un método metaheurístico

Introducción: En modelos de producción vocal que emplean estructuras de resorte-masa-amortiguador, la precisión en la determinación de coeficientes de amortiguamiento que se asemejen a las características fisiológicas de las cuerdas vocales es crucial, teniendo en cuenta posibles variaciones en la representación de la viscoelasticidad. Objetivo: Este estudio tiene como objetivo realizar un ajuste paramétrico de un modelo de producción vocal basado en un sistema de resorte-masa-amortiguador que incorpora interacción con la presión subglótica, con el fin de modelar de manera precisa las fuerzas de colisión ejercidas por las cuerdas vocales durante la fonación. Método: Se utilizó un algoritmo de búsqueda metaheurística para la síntesis paramétrica. El algoritmo se aplicó a los coeficientes de elasticidad c1 y c2, así como a los coeficientes de amortiguamiento ε1 y ε2, que se correlacionan directamente con las matrices de masa del modelo. Esto facilita el ajuste de la composición de las cuerdas para lograr un comportamiento fisiológico deseado. Resultados: El comportamiento del sistema vocal para cada ciclo de simulación se comparó con un estándar predefinido en condiciones normales. El algoritmo determinó el punto final de la simulación evaluando las discrepancias entre características clave de las señales obtenidas y las deseadas. Conclusión: El ajuste paramétrico permitió la aproximación del comportamiento fisiológico de la producción vocal, proporcionando estimaciones de las fuerzas de impacto experimentadas por las cuerdas vocales durante la fonación.

Introduction: In vocal production models employing spring-mass-damper frameworks, precision in determining damping coefficients that align with physiological vocal fold characteristics is crucial, accounting for potential variations in the representation of viscosity-elasticity properties. Objective: This study aims to conduct a parametric fitting of a vocal production model based on a mass-spring-damper system incorporating subglottic pressure interaction, with the purpose of accurately modeling the collision forces exerted by vocal folds during phonation. Method: A metaheuristic search algorithm was employed for parametric synthesis. The algorithm was applied to elasticity coefficients c1 and c2, as well as damping coefficients ε1 and ε2, which directly correlate with the mass matrices of the model. This facilitates the adjustment of fold composition to achieve desired physiological behavior. Results: The vocal system's behavior for each simulation cycle was compared to a predefined standard under normal conditions. The algorithm determined the simulation endpoint by evaluating discrepancies between key features of the obtained signals and the desired ones. Conclusion: Parametric fitting enabled the approximation of physiological vocal production behavior, providing estimates of the impact forces experienced by vocal folds during phonation.

Identification of microorganisms in wet coffee fermentation Coffea arabica Var Catimor and Castillo in Jardín, Antioquia-Colombia, using culture-dependent methods / Identificación de microorganismos en fermentación húmeda de café Coffea arabica Var Catimor y Castillo en Jardín, Antioquia-Colombia, usando métodos cultivo-dependientes

Background: Mild Colombian coffees are recognized worldwide for their high-quality coffee cup. However, there have been some failures in post-harvest practices, such as coffee grain fermentation. These failures could occasionally lead to defects and inconsistencies in quality products and economic losses for coffee farmers. In Colombia, one of the fermentation methods most used by coffee growers is wet fermentation, conducted by submerging the de-pulped coffee beans for enough time in water tanks to remove the mucilage. Objectives: We evaluated the effect of the water (g)/de-pulped coffee (g) ratio (I: 0/25, II: 10/25, III: 20/25) and final fermentation time (24, 48, and 72 hours) on the total number of microbial groups. We also identified microorganisms of interest as starter cultures. Methods: We used a completely randomized experimental design with two factors; the effect of the water (g)/de-pulped coffee (g) ratio (I: 0/25, II: 10/25, III: 20/25) and final fermentation time (24, 48, and 72 hours), for 9 treatments with two replicates. During the coffee fermentation (1,950 g), the pH and °Brix were monitored. Total counts of different microbial groups (mesophiles, coliforms, lactic-acid bacteria, acetic-acid bacteria, and yeasts) were performed. Various isolates of microorganisms of interest as starter cultures (lactic-acid bacteria and yeasts) were identified using molecular sequencing techniques. Results: 21 lactic-acid bacteria (LAB) isolates and 22 yeasts were obtained from the different mini-batch fermentation systems. The most abundant lactic-acid bacteria species found were Lactiplantibacillus plantarum (46%) and Levilactobacillus brevis (31%). Pichia kluivery (39%) and Torulaspora delbrueckii (22%) were the most abundant yeast species. Conclusion The studied factors did not have effect over the microorganism's development. The identified bacterial and yeasts species have potential as starter cultures for better-quality coffees and in fermentation-related applications.

Antecedentes: Los cafés suaves lavados colombianos son reconocidos a nivel mundial por su buena puntuación sensorial; sin embargo, se han detectado fallas en las prácticas de postcosecha, como lo es la fermentación de los granos de café. Dichas fallas pueden causar defectos y carecer de consistencia en la calidad del producto, ocasionando pérdidas económicas para los caficultores. En Colombia, uno de los métodos más usados por los caficultores es la fermentación húmeda, la cual consiste en sumergir los granos de café despulpado en tanques con agua por un período de tiempo que permita la remoción del mucílago. Objetivos: La presente investigación evaluó la incidencia que tienen la proporción agua/granos despulpados de café (I: 0/25, II: 10/25, III: 20/25) y el tiempo final de fermentación (24, 48 y 72 horas) en el recuento final de grupos microbianos. Por otra parte, se identificaron taxonómicamente microorganismos de interés para su uso como cultivos iniciadores. Métodos: Mini-lotes consistieron en café despulpado (1950 g) puesto en recipientes de plástico abiertos y sumergidos en agua. Se aplicó un diseño experimental completamente aleatorizado de dos factores (proporción agua/ granos de café despulpado y tiempo) a tres niveles, para un total de nueve tratamientos con dos replicas. Durante las fermentaciones de café (1,950 g), el pH y los grados ºBrix, fueron monitoreados. Se realizaron los recuentos totales de los diferentes grupos microbianos: mesófilos, coliformes, bacterias ácido-lácticas, bacterias ácido-acéticas y levaduras. Se identificaron molecularmente diferentes aislados con potencial para ser usados como cultivos iniciadores (bacterias ácido-lácticas y levaduras). Resultados: Los resultados obtenidos mostraron que no hubo diferencia estádisticamente significativa entre los tratamientos aplicados y el recuento final de microorganismos. Un total de 21 aislados de bacterias ácido-lácticas (BAL) y 22 levaduras lograron obtenerse a partir de los diferentes sistemas de fermentación en mini-lote. Las especies de bacterias ácido-lácticas con mayor porcentaje acorde a su identificación taxonómica, corresponden a Lactiplantibacillus plantarum (46%), Levilactobacillus brevis (31%). Las especies de levaduras con mayor porcentaje acorde a su identificación taxonómica corresponden a Pichia kluivery (39%) y Torulaspora delbrueckii (22%). Conclusión Los factores estudiados no afectaron el crecimiento de ninguno de los grupos microbianos presentes en la fermentacion del café. Las especies de microorganismos identificados tienen potencial para se usados como cultivos starter o en aplicaciones dentro de las ciencias de fermentación.

Portfólio: percepção de estudantes de graduação da área da saúde / Portafolio: percepción de los estudiantes de pregrado en eláreade la salud / Portfolio: perception of undergraduate students in the healthcare field

Introdução:A formação em saúde norteia a prática profissional, incidindo diretamente na atenção e assistência à saúde ofertada à população. Nesse sentido, o uso de métodos ativos de aprendizagem e avaliação, como por exemplo, o portfólio, podem contribuir para a construção de conhecimentos crítico-reflexivos. Objetivo:Evidenciara percepção de estudantes dos cursos da área da saúde, que cursam a disciplina de Saúde e Cidadania na Universidade Federal do Rio Grande do Norte sobre o uso do portfólio enquanto instrumento de avaliação do ensino aprendizagem. Metodologia:Os dados foram obtidos por meio da formação de grupo focaleanalisados pela análise do conteúdo. Definiram-se, então, as categorias temáticas:percepção sobre o portfólio; a elaboração do portfólio e a sua contribuição para a formação; dificuldades para formulação doportfólio;o portfólio como instrumento de avaliação. Resultados:Os estudantes compreendem o portfólio como instrumento de diálogo entre docentes e discentes, através dos relatos das vivências em grupo nos equipamentos sociais e reflexões individuais na construção de conceitos e aprofundamento teórico. Ainda referem inseguranças e dúvidas acerca da estruturação e confecção do instrumento, no entanto, percebem o portfólio como potente e inovador no auxílio aconstrução do conhecimento uma vez que permite oacompanhamento do processo de ensino-aprendizagem, possibilitando maior interação entre educador-educando, com produção de uma aprendizagem significativa.Conclusões:o portfólio estimula a reflexão e a crítica acerca das vivências nos cenários de práticas onde se desenvolve o componente curricular Saúde e Cidadaniacorroborando, sobremaneira, para a construção do conhecimento dos estudantes (AU).

Introduction:A degreein healthcare guides the professional practice, directly affecting the healthcare attention and assistance offered to the population. In this sense, the use of active learning and assessment methods, such as portfolios, can contribute to the construction of critical-reflective knowledge. Objective:To highlight the perception of students from health courses, who study the Health and Citizenship discipline at the Federal University of Rio Grande do Norte, regarding the use of the portfolio as an instrument for evaluating teaching and learning.Methodology:Data were obtained through the formation of a focus group and analyzed using content analysis. Thematic categories were then defined: perception of the portfolio; the preparation of the portfolio and its contribution to training; difficulties in formulating the portfolio; the portfolio as an assessment tool. Results:Students understand the portfolio as an instrument of dialogue between teachers and students, through reports of group experiences in social facilities and individual reflections in the construction of concepts and theoretical deepening. They still report insecurities and doubts about the structuring and creation of the instrument, however, they perceive the portfolio as powerful and innovativein helping to build knowledge as it allows the monitoring of the teaching-learning process, enabling greater interaction between educator and student, with the production of significant learning. Conclusions:The portfolio encourages reflection and criticism about the experiences in the practical scenarios where the curricular component -SACI is developed, greatly supporting the construction of students' knowledge (AU).

Introducción:La formación en salud orienta la práctica profesional, incidiendo directamente en la atención y asistencia sanitaria que se ofrece a la población. En este sentido, el uso de métodos activos de aprendizaje y evaluación, como los portafolios, puedecontribuir a la construcción de conocimiento crítico-reflexivo. Objetivo:Resaltar la percepción de estudiantes de carreras de salud, que cursan la disciplina Salud y Ciudadanía de la Universidad Federal de Rio Grande do Norte, sobre el uso del portafolios como instrumento de evaluación de la enseñanza y del aprendizaje. Metodología:Los datos se obtuvieron mediante la formación de un grupo focal y se analizaron mediante análisis de contenido. Luego se definieron categorías temáticas: percepción del portafolio; la elaboración del portafolio y su contribución a la formación; dificultades para formular el portafolio; el portafolio como herramienta de evaluación.Resultados:Los estudiantes entienden el portafolio como un instrumento de diálogo entre docentes y estudiantes, a través de relatos de experiencias grupales en establecimientos sociales y reflexiones individuales en la construcción de conceptos y profundización teórica. Aún reportan inseguridades y dudas sobre la estructuración y creación del instrumento, sin embargo, perciben el portafolio como poderoso e innovador para ayudar a la construcción de conocimiento ya que permite el seguimiento del proceso de enseñanza-aprendizaje, posibilitando una mayor interacción entre educador y estudiante, con la producción de aprendizajes significativos.Conclusiones: El portafolio incentiva la reflexión y crítica sobre las experiencias en los escenarios prácticos donde se desarrolla el componente curricular -SACI, apoyando en gran medida la construcción del conocimiento de los estudiantes (AU).

Evidence-Based Dampness-Heat ZHENG (Syndrome) in Cancer: Current Progress toward Establishing Relevant Animal Model with Pancreatic Tumor / 中国结合医学杂志

Cancer is one of the deadliest diseases affecting the health of human beings. With limited therapeutic options available, complementary and alternative medicine has been widely adopted in cancer management and is increasingly becoming accepted by both patients and healthcare workers alike. Chinese medicine characterized by its unique diagnostic and treatment system is the most widely applied complementary and alternative medicine. It emphasizes symptoms and ZHENG (syndrome)-based treatment combined with contemporary disease diagnosis and further stratifies patients into individualized medicine subgroups. As a representative cancer with the highest degree of malignancy, pancreatic cancer is traditionally classified into the "amassment and accumulation". Emerging perspectives define the core pathogenesis of pancreatic cancer as "dampness-heat" and the respective treatment "clearing heat and resolving dampness" has been demonstrated to prolong survival in pancreatic cancer patients, as has been observed in many other cancers. This clinical advantage encourages an exploration of the essence of dampness-heat ZHENG (DHZ) in cancer and investigation into underlying mechanisms of action of herbal formulations against dampness-heat. However, at present, there is a lack of understanding of the molecular characteristics of DHZ in cancer and no standardized and widely accepted animal model to study this core syndrome in vivo. The shortage of animal models limits the ability to uncover the antitumor mechanisms of herbal medicines and to assess the safety profile of the natural products derived from them. This review summarizes the current research on DHZ in cancer in terms of the clinical aspects, molecular landscape, and animal models. This study aims to provide comprehensive insight that can be used for the establishment of a future standardized ZHENG-based cancer animal model.

Meta-analysis of the efficacy of invisible orthodontic appliances for maxillary molar distalization in adult patients / 口腔疾病防治

Objective@#To evaluate the clinical efficacy of invisible orthodontic appliances without brackets for the distal movement of maxillary molars to improve the ability of orthodontists to predict treatment outcomes.@*Methods@#Web of Science, Cochrane Library, Embase, PubMed, Wanfang Database, CNKI Database, and VIP Database were searched for studies investigating the efficacy of invisible orthodontic appliances for distal movement of maxillary molars in adult patients and published from database inception to August 1, 2023. A total of three researchers screened the studies and evaluated their quality and conducted a meta-analysis of those that met quality standards.@*Results@#This study included 13 pre- and postcontrol trials with a total sample size of 281 patients. The meta-analysis revealed no significant differences in the sagittal or vertical parameters of the jawbone after treatment when compared with those before treatment (P>0.05). The displacement of the first molar was MD=-2.34, 95% CI (-2.83, -1.85); the displacement was MD=-0.95, 95% CI (-1.34, -0.56); and the inclination was MD=-2.51, 95% CI (-3.56, -1.46). There was a statistically significant difference in the change in sagittal, vertical, and axial tilt of the first molar before and after treatment. After treatment, the average adduction distance of the incisors was MD=-0.82, 95% CI (-1.54, -0.09), and the decrease in lip inclination was MD=-1.61, 95% CI (-2.86, -0.36); these values were significantly different from those before treatment (P<0.05).@*Conclusion@#Invisible orthodontic appliances can effectively move the upper molars in a distal direction and control the vertical position of the molars. When the molars move further away, there is some degree of compression and distal tilt movement, which is beneficial for patients with high angles. The sagittal movement of incisors is beneficial for improving the patient's profile.

Thinking of Traditional Chinese Medicine in Prevention and Treatment of Panvascular Diseases Based on ''Blood Vessel-Zangfu Organ-Syndrome Differentiation and Treatment'' / 中国实验方剂学杂志

The term ''panvascular'' refers to the human vascular system， which is a complex network of arteries， veins， and lymphatic vessels. Panvascular diseases refer to a group of vascular system diseases， with vascular atherosclerosis as the common pathological feature. The panvascular diseases in target organs such as the heart， brain， kidney， and limbs are caused by ischemia or bleeding， including arterial system diseases， venous system diseases， microcirculation system diseases， and Zangfu organ-blood vessel diseases. The concept of panvascular diseases integrates vascular lesions and target organ damage. In clinical practice， blood vessels in multiple regions are regarded as a large vascular unit system， and vascular lesions and the induced target organ damage are considered as a whole. Based on the holistic concept and the Zangxiang theory in traditional Chinese medicine （TCM）， the ''blood vessel-Zangfu organ-syndrome differentiation and treatment'' network is built， on the basis of which a pattern of vascular disease-Zangfu organ dysfunction-syndrome differentiation and treatment is applied to the TCM diagnosis and treatment of panvascular diseases. The theory of treating arterial system diseases from the heart， venous system diseases from the kidneys， and microvascular system diseases from the liver is proposed. According to the causes identified based on syndrome differentiation， this paper summarizes the methods of reinforcing Yang and activating blood （including warming Yang and activating blood， replenishing Qi and activating blood， replenishing Qi， nourishing Yin and activating blood， activating Yang and blood， dispersing cold and activating blood）， cooling blood and resolving stasis， tonifying kidney and promoting urination coupled with activating blood and dredging vessels， nourishing Yin and tonifying kidney coupled with activating blood and dredging vessels， and soothing liver and regulating Qi coupled with activating blood and dredging collaterals， as well as wind-extinguishing medicines， applied to the treatment of panvascular diseases， aiming to provide methods and ideas for the treatment of vascular diseases with TCM.

Application of Narrative Education in Nursing Education in China / 中国医学伦理学

In recent years, through the research and practice of narrative education, certain results have been achieved.The application of narrative education has become an inevitable trend. In recent years, through the research and practical development of narrative education, some results have been achieved. In order to make narrative education not only meet the needs of contemporary nursing students, but also conform to the development of today’s nursing field, we should effectively cultivate the narrative ability of nursing professionals and promote effective communication between nurses and patients. Make up for the shortcomings of traditional teaching, and create a teaching model that is in line with the characteristics of Chinese social culture and nursing specialty; Improve the evaluation method and index system to test the effect of narrative education; Strengthening the educational scheme of theoretical knowledge and practical narration; Developing narrative education mode combining with evidence-based nursing in nursing teaching.

Herbal Textual Research on Selaginellae Herba in Famous Classical Formulas / 中国实验方剂学杂志

By consulting the ancient Chinese herbal books， medical books and formularies of the past dynasties， and combining with modern research data， this paper makes a systematic textual research on the name， origin， place of origin， traditional quality evaluation， harvesting and processing of Selaginellae Herba， so as to provide a basis for the development and utilization of the relevant famous classical formulas. According to the textual research， Juanbai is the correct name of the herbal medicine in all dynasties， and there are also aliases such as Baozu， Qiugu， Jiaoshi and Jiusi Huanhuncao. The origin of Selaginellae Herba in the ancient herbal books was Selaginella tamariscina in all dynasties. Since the Republic of China， S. pulvinata has been gradually used as another origin of Selaginellae Herba. In ancient times， the producing area of S. tamariscina was mainly in Shandong， Hebei， Henan， Shaanxi， Jiangsu and Sichuan， etc. Nowadays， it is produced all over the country. S. pulvinata is mainly produced in Guangxi， Fujian， Sichuan， Guizhou， Yunnan， Hebei and so on. Since the recent times， it is concluded that the quality of the green color， complete and unbroken is good. Before the Qing dynasty， it was recorded that the harvesting time of Selaginellae Herba was generally from April to July， and it was expanded to all year round since the Qing dynasty. After harvesting， remove the sediment（sand and mud）， cut off the fibrous roots and dry in the shade or in the sun. The processing methods in all dynasties were mainly carbonizing by stir-frying and stir-bake to brown， and some ancient books contained the processing method of brine boiling， which was rarely used in modern times. Based on the results， it is recommended that S. tamariscina should be used as the base material of Selaginellae Herba. Because of more impurities， it should be fully purified to ensure the cleanliness of the herb， and the processing method can be based on the prescription requirements， if the processing requirements are not specified， the raw products can be used， charcoal products is recommended for use as an hemostatic.

Lipid nanovehicles overcome barriers to systemic RNA delivery: Lipid components, fabrication methods, and rational design

Lipid nanovehicles are currently the most advanced vehicles used for RNA delivery, as demonstrated by the approval of patisiran for amyloidosis therapy in 2018. To illuminate the unique superiority of lipid nanovehicles in RNA delivery, in this review, we first introduce various RNA therapeutics, describe systemic delivery barriers, and explain the lipid components and methods used for lipid nanovehicle preparation. Then, we emphasize crucial advances in lipid nanovehicle design for overcoming barriers to systemic RNA delivery. Finally, the current status and challenges of lipid nanovehicle-based RNA therapeutics in clinical applications are also discussed. Our objective is to provide a comprehensive overview showing how to utilize lipid nanovehicles to overcome multiple barriers to systemic RNA delivery, inspiring the development of more high-performance RNA lipid nanovesicles in the future.

Transição alimentar de prematuros internados na Unidade Canguru: revisão sistemática / Transición alimentaria de prematuros internados en la Unidad Canguro: revisión sistemática / Food transition of premature infants admitted to the Kangaroo Unit: systematic review

Resumo Objetivo Analisar as evidências disponíveis sobre a transição alimentar de sonda orogástrica para aleitamento materno diretamente na mama com prematuros internados em unidades hospitalares. Métodos Revisão sistemática da literatura com busca nas bases de dados PubMed/MEDLINE, Web of Science, EMBASE, Scopus, Cochrane CENTRAL, CINAHL, com os critérios de inclusão: estudos experimentais, sem restrição temporal e nos idiomas português, espanhol e inglês. A avaliação metodológica foi realizada por meio das ferramentas Grading of Recommendations Assessment, Development and Evaluation (GRADE) e Revised Cochrane risk-of-bias tool for randomized trials (RoB 2.0) e consistiu em duas etapas: qualidade metodológica e o risco de viés dos estudos. Resultados Foram identificados 10 artigos, todos ensaios clínicos randomizados. As técnicas utilizadas na transição da dieta dos prematuros encontradas foram: sonda-dedo e seringa, copo e sonda-dedo, copo e mamadeira, colher e sucção não-nutritiva, sucção não-nutritiva, sucção não-nutritiva e estimulação oral, comportamento dos prematuros, cheiro do leite materno. Conclusão As técnicas evidenciadas permitiram a transição da dieta, em um período mais curto, reduzindo o tempo de internação, aumentando o ganho de peso e se mostraram seguras, desde que o prematuro tenha maturidade para ser realizada. Contudo, a mamadeira foi desaconselhada, pela ocorrência de episódios de dessaturação, aumento da frequência cardíaca e confusão de bico.

Resumen Objetivo Analizar las evidencias disponibles sobre la transición alimentaria de sonda orogástrica a lactancia materna directamente de la mama con prematuros internados en unidades hospitalarias. Métodos Revisión sistemática de la literatura con búsqueda en las bases de datos PubMed/MEDLINE, Web of Science, EMBASE, Scopus, Cochrane CENTRAL, CINAHL, con los siguientes criterios de inclusión: estudios experimentales, sin restricción temporal y en idioma portugués, español e inglés. La evaluación metodológica se realizó por medio de las herramientas Grading of Recommendations Assessment, Development and Evaluation (GRADE) y Revised Cochrane risk-of-bias tool for randomized trials (RoB 2.0) y consistió en dos etapas: calidad metodológica y riesgo de sesgo de los estudios. Resultados Se identificaron 10 artículos, todos ensayos clínicos aleatorizados. Las técnicas utilizadas para la transición de la dieta de prematuros fueron: dedo-jeringa y jeringa, vaso y dedo-jeringa, vaso y mamadera, cuchara y succión no nutritiva, succión no nutritiva, succión no nutritiva y estimulación oral, comportamiento de los prematuros, olor de la leche materna. Conclusión Las técnicas observadas permitieron realizar la transición de la dieta en un período más corto, con reducción del tiempo de internación y mejor aumento de peso y demostraron ser seguras, siempre que el prematuro tenga madurez para realizarlas. No obstante, se desaconseja la mamadera por la presencia de episodios de desaturación, aumento de la frecuencia cardíaca y confusión tetina-pezón. Número de registro da revisão sistemática: CRD42021240725 (https://www.crd.york.ac.uk/prospero/display_record.php?RecordID=240725)

Abstract Objective To analyze the available evidence on the transition from orogastric tube feeding to breastfeeding directly from the breast with premature infants admitted to hospital units. Methods Systematic literature review with search in the following databases: PubMed/MEDLINE, Web of Science, EMBASE, Scopus, Cochrane CENTRAL, CINAHL, with the inclusion criteria: experimental studies, without temporal restrictions and in Portuguese, Spanish and English. The methodological assessment was carried out using the Grading of Recommendations Assessment, Development and Evaluation (GRADE) and Revised Cochrane risk-of-bias tool for randomized trials (RoB 2.0) tools and consisted of two stages: methodological quality and the risk of bias of the studies. Results 10 papers were identified, all randomized clinical trials. The techniques used in transitioning the premature babies' diet were: finger tube and syringe, cup and finger tube, cup and bottle, spoon and non-nutritive sucking, non-nutritive sucking, non-nutritive sucking and oral stimulation, behavior of premature babies, and smell of breast milk. Conclusion The demonstrated techniques allowed the transition of the diet in a shorter period, reducing the length of hospital stay, increasing weight gain 1and proved to be safe, as long as the premature baby is mature enough to undergo the procedure. However, bottle feeding was not recommended due to the occurrence of episodes of desaturation, increased heart rate and nipple confusion. Systematic review registration number: CRD42021240725 (https://www.crd.york.ac.uk/prospero/display_record.php?RecordID=240725)

Fibroelastoma, uma Doença Incidentaloma? - Imagem de Casos de Fibroelastomas como Achados Incidentais em Quatro Pacientes, Quatro Valvas Diferentes / Fibroelastoma, an Incidentaloma Disease? - Image Cases of Fibroelastomas as Incidental Findings in Four Patients, Four Different Valves

Resumo Os fibroelastomas são o segundo tumor cardíaco benigno mais comum. São estruturas pequenas, avasculares, com uma dimensão média de 9mm, podendo atingir até 70mm, habitualmente aderentes à superfície das válvulas cardíacas (válvulas aórtica e mitral são as mais comumente afetadas, seguidas das válvulas tricúspide e pulmonar). A etiologia não é clara, sendo a hipótese de formação de microtrombos nas margens de coaptação das válvulas a mais aceite. Na ecocardiografia apresentam aspeto pediculado, móvel, com superfície filamentosa, tipicamente com uma aparência pontilhada nas margens e ecolucente. Do ponto de vista clínico, podem estar associados a fenómenos embólicos, no entanto, na maioria dos casos o diagnóstico é incidental. Apresentamos de seguida quatro casos de diagnóstico incidental de fibroelastomas nas quatro válvulas cardíacas, diagnosticados por ecocardiograma transtorácico (ETT) (Vídeo 1; Figura 1). Vídeo 1 Da esquerda para a direita, de cima para baixo: fibroelastomas no folheto anterior da válvula tricúspide, folheto anterior da válvula mitral, cúspide esquerda da válvula pulmonar e cúspide esquerda da válvula aórtica, cada um correspondendo a um doente diferente. Em: http://abccardiol.org/supplementary-material/2024/12102/2023-0222_IM_video01.mp4 Figura 1 Da esquerda para a direita, de cima para baixo: fibroelastomas no folheto anterior da válvula tricúspide, folheto anterior da válvula mitral, cúspide esquerda da válvula pulmonar e cúspide esquerda da válvula aórtica, cada um correspondendo a um doente diferente.

Abstract Fibroelastomas are the second most common benign cardiac tumor1. They are small avascular structures with a mean size of 9mm, ranging up to 70mm, usually attached to the heart valves' surface (aortic and mitral are the most affected, followed by tricuspid and pulmonary valves). Their etiology is unclear, but the hypothesis of coalescence of microthrombus at the coaptation margins of valves is the most widely accepted theory. On echocardiography, they are pedicled, mobile, with a filamentous surface, and usually have a speckled appearance with echolucencies and a stippled pattern near the edges. Clinically, they may be associated with embolic phenomena; however, in most cases, the diagnosis is incidental. We present a series of four clinical cases with an incidental diagnosis of fibroelastomas across the four cardiac valves as assessed by transthoracic echocardiography (Video 1; Figure 1). Video 1 From left to right and top to bottom: fibroelastomas of the anterior leaflet of the tricuspid valve, anterior leaflet of the mitral valve, left cusp of the pulmonary valve and left cuspid of the aortic valve, each corresponding to a different patient. Link: http://abccardiol.org/supplementary-material/2024/12102/2023-0222_IM_video01.mp4 Figure 1 From left to right and top to bottom: fibroelastomas of the anterior leaflet of the tricuspid valve, anterior leaflet of the mitral valve, left cusp of the pulmonary valve and left cuspid of the aortic valve, each corresponding to a different patient.

Choroidal macrovascular and capillary alterations in eyes with idiopathic epiretinal membranes

ABSTRACT Purpose: To evaluate the choroidal vascular alterations and effect of surgical treatment in the setting of idiopathic epiretinal membranes. Methods: The structure of the choroid was studied in 33 patients with unilateral idiopathic epiretinal membrane using optical coherence tomography with enhanced depth imaging and optical coherence tomography angiography. Eyes with epiretinal membrane underwent 25-gauge vitrectomy with epiretinal membrane and internal limiting membrane peeling. The choroidal vascularity index, Haller layer/choroidal thickness ratio, and choriocapillaris flow density were used to evaluate changes in choroidal structure after surgery and compare with the healthy fellow eyes. Results: The choroidal vascularity index and Haller layer/choroidal thickness ratio of the eyes with epiretinal membrane were higher than those of the fellow eyes at baseline (p=0.009 and p=0.04, respectively) and decreased postoperatively compared with preoperative values (p=0.009 and p=0.001, respectively). The choriocapillaris flow of eyes with epiretinal membrane was lower than that of the fellow eyes at baseline (p=0.001) and increased after surgery compared with the preoperative value (p=0.04). The choroidal vascularity index, Haller layer/choroidal thickness ratio, and choriocapillaris flow values of the healthy fellow eyes were comparable at baseline and final visit. In eyes with epiretinal membrane, the final choroidal vascularity index correlated with the final choriocapillaris flow (r=-0.749, p=0.008) in the multivariate analysis. Conclusion: Idiopathic epiretinal membrane appears to affect the choroidal structure with increased choroidal vascularity index and Haller layer/choroidal thickness ratio and decreased choriocapillaris flow. These macrovascular (choroidal vascularity index and Haller layer/choroidal thickness) and microvascular (choriocapillaris flow) alterations appear to be relieved by surgical treatment of the epiretinal membranes.

Effect of the COVID-19 pandemic on cataract surgery by residents who had routine surgical simulator training during residency

ABSTRACT Purpose: To assess the effect of the coronavirus disease 2019 (COVID-19) pandemic on cataract surgery by residents who had mandatory surgical simulator training during residency. Methods: In this retrospective, observational analytical study, the total number of cataract surgeries and surgical complications by all senior residents of 2019 (2019 class; prepandemic) and 2020 (2020 class; affected by the reduced number of elective surgeries due to the COVID-19 pandemic) were collected and compared. All residents had routine mandatory cataract surgery training on a virtual surgical simulator during residency. The total score obtained by these residents on cataract challenges of the surgical simulator was also evaluated. Results: The 2020 and 2019 classes performed 1275 and 2561 cataract surgeries, respectively. This revealed a reduction of 50.2% in the total number of procedures performed by the 2020 class because of the pandemic. The incidence of surgical complications was not statistically different between the two groups (4.2% in the 2019 class and 4.9% in the 2020 class; p=0.314). Both groups also did not differ in their mean scores on the simulator's cataract challenges (p<0.696). Conclusion: Despite the reduction of 50.2% in the total number of cataract surgeries performed by senior residents of 2020 during the COVID-19 pandemic, the incidence of surgical complications did not increase. This suggests that surgical simulator training during residency mitigated the negative effects of the reduced surgical volume during the pandemic.

Prevalence of Critical Congenital Heart Disease Detected in the Pulse Oximetry Test in Asymptomatic Newborns, ≥35 Gestational Weeks, in a Maternity in Southern Brazil

Abstract Background Congenital heart diseases (CHD) are one of the most prevalent malformations, and the screening tests to identify critical congenital heart disease (CCHD) is the pulse oximetry test, with subsequent investigation and treatment. Objective To quantify positive pulse oximetry tests and verify the prevalence of CCHD detected by it in asymptomatic newborns, ≥35 gestational weeks, in a Brazilian maternity hospital. Methodology This is an observational, retrospective, quantitative, analytical and cross-sectional study, conducted from October 2020 to May 2022, in a maternity hospital in southern Brazil, through the collection of records of positive oximetry pulse tests, following the norms of screening CCHD test of the Brazilian Society of Pediatrics (SBP), after they were evaluated with echocardiography for confirmation or exclusion of CHD. Results A total of 5,667 newborns were evaluated in this study, according to the inclusion criteria; 0.17% (n = 10) had a positive pulse oximetry test. Regarding the results of the echocardiography of the neonates with a positive test, two were normal, seven were cases of patent foramen ovale (PFO), and one was a case (0,017%) with interatrial communication (IAC) diagnosis. In the same period, five neonates with CCHD were born, symptomatic, diagnosed by physical examination, and referred to neonatal intensive care units (NICU) before taking the neonatal cardiac screening (< 24 hours of life). Conclusion The prevalence of positive pulse oximetry tests was 0.17% and none CCHD was detected. Five cases of CCHD were born in this period, but they were diagnosed before the recommend time to perform the screening test.

Polyphenol analysis in human milk by a rapid, cost-effective, and accurate micromethod: translational development / Análise de polifenóis no leite humano por meio de um micrométodo rápido, econômico e preciso: desenvolvimento translacional

ABSTRACT Objective: To develop a rapid method for analysing polyphenols, which are potentially active antioxidants against neonatal oxidative stress, from small human milk (HM) volumes. Methods: Acid and alkaline extractions were compared using two dyes: Folin-Ciocalteu and Fast Blue BB. Linearity, sensitivity, recovery percentage, polyphenol content, precision, and stability were assessed in 14 HM samples and compared using the Kruskal-Wallis H test (p<0.05). The best technique was applied to 284 HM samples to determine their polyphenolic content and its association with maternal diet by multifactorial linear regression. Results: Acidic extraction successfully recovered the gallic acid reference standard, whereas alkaline extraction overestimated it. Calibration curves for all methods were linear (R2>0.96) up to 500 mg/L. All bicarbonate-based Folin-Ciocalteu methods assayed were stable and repeatable, whereas Fast Blue BB-based variants were not. HM polyphenols (mean=94.68 mg/L) positively correlated to the dietary intake of hydroxycinnamic acids, the most consumed polyphenolic family in this population. Conclusions: A bicarbonate-based Folin-Ciocalteu micromethod allowed the accurate determination of polyphenols in HM, which might be useful for translational research settings and HM banks.

RESUMO Objetivo: Desenvolver um método rápido para analisar polifenóis, que são antioxidantes potencialmente ativos contra o estresse oxidativo neonatal, em pequenos volumes de leite humano (LH). Métodos: Foram comparadas extrações ácidas e alcalinas usando dois corantes: Folin-Ciocalteu e Fast Blue BB. Foram avaliadas variáveis como linearidade, sensibilidade, percentagem de recuperação, teor de polifenóis, precisão e estabilidade em 14 amostras de LH, comparadas usando o teste de Kruskal-Wallis H (p<0,05). A melhor técnica foi aplicada a 284 amostras de LH para determinar seu teor polifenólico e sua associação com a dieta materna por regressão linear multifatorial. Resultados: A extração ácida recuperou com sucesso o padrão de referência do ácido gálico, enquanto a extração alcalina o superestimou. As curvas de calibração para todos os métodos foram lineares (R2>0,96) até os 500 mg/L. Todos os métodos testados baseados em Folin-Ciocalteu com bicarbonato foram estáveis e repetíveis, enquanto as variantes baseadas em Fast Blue BB não. Os polifenóis do HM (média=94,68 mg/L) correlacionaram-se positivamente com a ingestão dietética de ácidos hidroxicinâmicos, a família de polifenóis mais consumida nesta população. Conclusões: Um micrométodo baseado em bicarbonato de Folin-Ciocalteu permitiu a determinação precisa de polifenóis no HM, o que pode ser útil para configurações de pesquisa translacional e bancos de HM.

Brazilian version of the Pasero Opioid-Induced Sedation Scale: cross-cultural adaptation study / Versión brasileña de la escala Pasero Opioid-Induced Sedation Scale: estudio de adaptación transcultural / Versão brasileira da Pasero Opioid-Induced Sedation Scale: estudo de adaptação transcultural

ABSTRACT Objective: Perform a cross-cultural adaptation of the Pasero Opioid-induced Sedation Scale to the Brazilian setting. Method: This is a methodological study using Beaton's framework, which consists in six stages: translation, synthesis of translations, re-translation, expert committee, pre-test, and sending the adapted version of the instrument to the author of the original. The study was carried out from April to December 2021. The research was conducted in a private hospitalin the city of São Paulo, in the adult hospitalization and critical care units. It was approved by the research ethics committee. Results: After translation, translation synthesis and back-translation steps, the version was evaluated by the expert committee, requiring two rounds to obtain acceptable CVI values above 0.80. In the pre-test phase, the scale was well understood, with a CVI of 0.98. Conclusion: The scale was adapted for the Brazilian context; however, further studies will be needed to analyze validity and reliability evidence.

RESUMEN Objetivo: Realizar la adaptación transcultural de la escala de Pasero Opioid-induced Sedation Scale para el contexto brasileño. Método: Estudio metodológico, utilizando el marco de referencia de Beaton, que consta de seis fases: traducción, síntesis de traducciones, traducción inversa, comité de expertos, prueba previa, y envío del instrumento adaptado ala autora del instrumento original. El estudio se realizó de abril a diciembre de 2021, y a la investigación se condujo en un hospital privado, ubicado en la ciudad de São Paulo, en las unidades de hospitalización de adultos y cuidados críticos. Recibió la aprobación del comité de ética. Resultados: Después de las etapas de traducción, síntesis de traducción y traducción inversa, la versión fue evaluada por un comité de expertos, con dos rondas para obtener valores aceptables de índice de validez de contenido superiores a 0,80. En la fase previa a la prueba, la escala mostró una buena comprensión, con una puntuación de 0,98. Conclusión: La escala fue adaptada para el contexto brasileño, sin embargo, serán necesarios más estudios para analizar las evidencias de validez y confiabilidad.

RESUMO Objetivo: Realizar adaptação transcultural da escala Pasero Opioid-Induced Sedation para o cenário brasileiro. Método: Estudo metodológico, utilizado referencial de Beaton, composto por seis fases: tradução, síntese das traduções, retradução, comitê de especialistas, pré-teste e envio dos instrumentos adaptados ao autor do instrumento original. Estudo foi realizado de abril a dezembro de 2021. A pesquisa desenvolveu-se em um hospital privado, localizado no município de São Paulo, nas unidades de internação e críticas adultos. Recebeu aprovação do comitê de ética. Resultados: Após as etapas de tradução, síntese de tradução e retrotradução a versão foi avaliada pelo comitê de especialistas, com duas rodadas para obtenção de valores aceitáveis de índice de validade de conteúdo acima de 0,80. Na fase de pré-teste a escala apresentou boa compreensão com score de 0,98. Conclusão: A escala foi adaptada para o contexto brasileiro, no entanto, novos estudos serão necessários para análises de evidências de validade e confiabilidade.

Evaluation of unilateral corneal collagen cross-linking on fellow untreated eyes of patients with keratoconus / A avaliação da reticulação unilateral do colágeno corneano em olhos não tratados de pacientes com ceratocone

ABSTRACT Purpose: This study aimed to examine the effects of unilateral corneal collagen cross-linking treatment on visual acuity and the topographic findings of the fellow untreated eye of patients who had bilateral progressive keratoconus. Methods: Patients with progressive keratoconus who underwent cross-linking treatment were screened retrospectively. A total of 188 untreated eyes of 188 patients whose eyes were treated unilaterally with either standard or accelerated cross-linking and refused cross-linking procedure for the fellow eye were included. Visual acuity and topographic findings of the fellow untreated eyes were obtained preoperatively and postoperatively at the 1st, 3rd, 6th, 12th, 24th, 30th, and 36th months. Results: The change over time of variables examined was similar in the untreated eyes of patients who received standard and accelerated cross-linking methods (p>0.05). At the 12th month, 136 (95.8%) untreated eyes were stable according to progression criteria. Only 4 (8%) eyes were progressive at the 24th month. No progression was observed in any of the 16 patients with a 36-month follow up. Conclusions: The results showed that the fellow untreated eyes of patients with bilateral progressive keratoconus did not have significant progression rates after unilateral cross-linking treatment.

RESUMO Objetivo: Examinar os efeitos do tratamento de reticulação unilateral do colágeno corneano na acuidade visual e os achados topográficos em olhos não tratados de pacientes com ceratocone progressivo bilateral. Métodos: Foram rastreados retrospectivamente pacientes com ceratocone progressivo submetidos a tratamento de reticulação. Foram incluídos no estudo 188 olhos não tratados de 188 pacientes tratado unilateralmente com reticulação padrão ou acelerada e que recusaram o procedimento de reticulação no outro olho. A acuidade visual e os achados topográficos dos olhos não tratados foram obtidos no pré- e pós-operatório no 1º, 3º, 6º, 12º, 24º, 30º e 36º mês. Resultados: As alterações ao longo do tempo foram semelhantes para as variáveis examinadas nos olhos não tratados de pacientes tratados com métodos de reticulação padrão e acelerado (p>0,05). No 12º mês, 136 olhos não tratados (95,8%) estavam estáveis, de acordo com os critérios de progressão. Apenas quatro olhos (8%) mostraram progressão no 24º mês. Nenhuma progressão foi observada nos 16 pacientes que tiveram um acompanhamento de 36 meses. Conclusões: O estudo mostrou que os olhos não tratados de pacientes com ceratocone progressivo bilateral não apresentaram taxas de progressão significativas após o tratamento unilateral com reticulação.