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.

Evaluation of Plant-Based Byproducts as Green Fining Agents for Precision Winemaking.

Consumers are increasingly looking for foods, including wine, that are free of animal-derived proteins. This study seeks to evaluate patatin, a new, plant-based and allergen-free fining agent, by comparing it with the fining agents polyvinipolypyrrolidone, bovine serum albumin, and methylcellulose. Specifically, its effects on the phenolic profile of enological tannins were analyzed with four spectrophotometric assays: OD 280 nm, Folin−Ciocâlteu, Adams−Harbertson, and methylcellulose. In addition, changes in the polyphenol composition of Sangiovese red wine were determined by UV-Vis spectrophotometry and HPLC with adsorption trials, and the solid−liquid interaction in a wine solution was modeled by both Langmuir and Freundlich equations. Our findings highlight the occurrence of systematic proportional error between the selected spectrophotometric assays. As a result, direct comparisons of protein precipitation assays can be made only among results obtained with the same spectrophotometric method. However, it is clear that patatin has an impact on the phenolic profile of Sangiovese red wine: it removes simple phenolics (gallic acid, (+)-catechin, (−)-epicatechin, epicatechin gallate, syringic acid, fertaric acid, coutaric acid, and rutin) as well as both oligomeric and polymeric tannins to different extents. In concentrations of less than 1 g/L, the patatin isotherm showed a linear relation between the equilibrium concentration and the quantity absorbed, obeying the Freundlich model reasonably well (KF 1.46; 1/n 1.07; R2 0.996 with 1/n > 1). Thus, the adsorption process is strongly dependent on the fining dosage.

Trypanosoma cruzi infection follow-up in a sylvatic vector of Chagas disease: Comparing early and late stage nymphs.

Chagas disease is caused by Trypanosoma cruzi and transmitted by the triatomine Mepraia spinolai in the southwest of South America. Here, we examined the T. cruzi-infection dynamics of field-caught M. spinolai after laboratory feeding, with a follow-up procedure on bug populations collected in winter and spring of 2017 and 2018. Bugs were analyzed twice to evaluate T. cruzi-infection by PCR assays of urine/fecal samples, the first evaluation right after collection and the second 40 days after the first feeding. We detected bugs with: the first sample positive and second negative (+/-), the first sample negative and second positive (-/+), and with both samples positive or negative (+/+; -/-). Bugs that resulted positive on both occasions were the most frequent, with the exception of those collected in winter 2018. Infection rate in spring was higher than winter only in 2018. Early and late stage nymphs presented similar T. cruzi-infection rates except for winter 2017; therefore, all nymphs may contribute to T. cruzi-transmission to humans. Assessment of infection using two samples represents a realistic way to determine the infection a triatomine can harbor. The underlying mechanism may be that some bugs do not excrete parasites unless they are fed and maintained for some time under environmentally controlled conditions before releasing T. cruzi, which persists in the vector hindgut. We suggest that T. cruzi-infection dynamics regarding the three types of positive-PCR results detected by follow-up represent: residual T. cruzi in the rectal lumen (+/-), colonization of parasites attached to the rectal wall (-/+), and presence of both kinds of flagellates in the hindgut of triatomines (+/+). We suggest residual T. cruzi-infections are released after feeding, and result 60-90 days after infection persisting in the rectal lumen after a fasting event, a phenomenon that might vary between contrasting seasons and years.