Prevalencia de factores asociados al acceso venoso periférico difícil en población pediátrica en un hospital chileno / Prevalence of factors associated with difficult peripheral venous access in a paediatric population in a Chilean hospital / Prevalência de fatores associados ao acesso venoso periférico difícil em uma população pediátrica em um hospital chileno

INTRODUCCIÓN: La mitad de las instalaciones pediátricas de un catéter venoso periférico resultan ser en el contexto de un paciente, un acceso venoso difícil, definido como instalación de un catéter venoso periférico frustrado en la primera punción. Actualmente se utiliza como herramienta predictiva de acceso venoso difícil el DIVAscore, sin embargo, existen investigaciones que proponen nuevos factores asociados, surgiendo la necesidad de estudiarlos en profundidad. OBJETIVO: Identificar la prevalencia de factores asociados al acceso venoso difícil en pacientes pediátricos atendidos en el servicio de cirugía de un hospital en Chile, 2022. METODOLOGÍA: Investigación cuantitativa descriptiva transversal con muestreo intencionado. Fueron incluidos pacientes de edad entre 0a 14 años cumplidos con acceso venoso difícil. Para investigar estos antecedentes clínicos, se seleccionaron 5 de los más mencionados en la literatura: Obesidad, Diabetes, Anemia de Células Falciformes, Quimioterapia y Diálisis. Se utilizó una grilla de cotejo realizada Ad Hoc, los resultados fueron analizados mediante un software y el intervalo de confianza fue de 95%. RESULTADOS: La mediana de edad fue de 1 año, con un rango intercuartílico de 3. El antecedente evaluado más prevalente en los pacientes con acceso venoso difícil fue obesidad, presente en el 31% de la muestra y el segundo, fue anemia de células falciformes, presente en un 5%. CONCLUSIONES: Se evidenció una amplia diferencia entre las variables estudiadas, siendo obesidad la de mayor prevalencia; la investigación logró el propósito de aportar evidencia que ayude a la toma de decisiones para el cuidado del capital venoso del paciente.

INTRODUCTION: Half of the pediatric installations of a peripheral venous catheter turn out to be in the context of a patient, a difficult venous access, defined as the installation of a peripheral venous catheterfrustrated in the first puncture. Currently, the DIVAscore is used as a predictive tool for difficult venous access, however, there is research that proposes new associated factors, arising the need to study them in depth. AIM:To identify the prevalence of factors associated with difficult venous access in pediatric patients treated in the surgery service of a hospital in Chile, 2022. METHODOLOGY: Cross-sectional descriptive quantitative research with purposive sampling. Patients aged 0 to 14 years with difficult venous access were included. To investigate these clinical antecedents, 5 of the most mentioned in the literature were selected: Obesity, Diabetes, Sickle Cell Anemia, Chemotherapy and Dialysis. An Ad Hoc comparison grid was used, the results were analyzed using software and the confidence interval was 95%. RESULTS:The median age was 1 year, with an interquartile range of 3. The most prevalent antecedent evaluated in patients with difficult venous access was obesity, present in 31% of the sample and the second, was sickle cell anemia, present in 5%. CONCLUSIONS: A wide difference was evidenced between the variables studied, with obesity being the most prevalent; the research achieved the purpose of providing evidence that helps decision-making for the care of the patient's venous capital.

INTRODUÇÃO: Metade das instalações pediátricas de um cateter venoso periférico acaba por ser no contexto de um paciente, um acesso venoso difícil, definido como a instalação de um cateter venoso periférico frustrado na primeira punção. Atualmente, o DIVAscore é utilizado como ferramenta preditiva para acesso venoso difícil, entretanto, há pesquisas que propõem novos fatores associados, surgindo a necessidade de estudá-los a fundo. OBJETIVO: Identificar a prevalência de fatores associados à dificuldade de acesso venoso em pacientes pediátricos atendidos no serviço de cirurgia de um hospital no Chile, 2022. METODOLOGIA: Pesquisa quantitativa descritiva transversal com amostragem intencional. Foram incluídos pacientes de 0 a 14 anos com acesso venoso difícil.Para investigar esses antecedentes clínicos, foram selecionados 5 dos mais citados na literatura: Obesidade, Diabetes, Anemia Falciforme, Quimioterapia e Diálise. Uma grade de comparação Ad Hoc foi usada, os resultados foram analisados usando software eo intervalo de confiança foi de 95%.RESULTADOS: A mediana de idade foi de 1 ano, com intervalo interquartil de 3. O antecedente mais prevalente avaliado em pacientes com acesso venoso difícil foi a obesidade, presente em 31% da amostra e o segundo, foi aanemia falciforme, presente em 5 %. CONCLUSÕES: Evidenciou-se ampla diferença entre as variáveis estudadas, sendo a obesidade a mais prevalente; A pesquisa atingiu o objetivo de fornecer evidências que auxiliem na tomada de decisão para o cuidado com o capital venoso do paciente.

Neutral space analysis for a Boolean network model of the fission yeast cell cycle network

BACKGROUND: Interactions between genes and their products give rise to complex circuits known as gene regulatory networks (GRN) that enable cells to process information and respond to external stimuli. Several important processes for life, depend of an accurate and context-specific regulation of gene expression, such as the cell cycle, which can be analyzed through its GRN, where deregulation can lead to cancer in animals or a directed regulation could be applied for biotechnological processes using yeast. An approach to study the robustness of GRN is through the neutral space. In this paper, we explore the neutral space of a Schizosaccharomyces pombe (fission yeast) cell cycle network through an evolution strategy to generate a neutral graph, composed of Boolean regulatory networks that share the same state sequences of the fission yeast cell cycle. RESULTS: Through simulations it was found that in the generated neutral graph, the functional networks that are not in the wildtype connected component have in general a Hamming distance more than 3 with the wildtype, and more than 10 between the other disconnected functional networks. Significant differences were found between the functional networks in the connected component of the wildtype network and the rest of the network, not only at a topological level, but also at the state space level, where significant differences in the distribution of the basin of attraction for the G1 fixed point was found for deterministic updating schemes. CONCLUSIONS: In general, functional networks in the wildtype network connected component, can mutate up to no more than 3 times, then they reach a point of no return where the networks leave the connected component of the wildtype. The proposed method to construct a neutral graph is general and can be used to explore the neutral space of other biologically interesting networks, and also formulate new biological hypotheses studying the functional networks in the wildtype network connected component.