This study compares the tribological behavior of two ionic liquids (BMPFAP and (NEMM)MOEFAP) used as oil additive for the lubrication of a steel–steel contact. Friction and wear experiments were ...performed using a HFRR test machine. Friction coefficient and electrical contact resistance were measured during the tests, and the wear surface was analyzed by confocal microscopy and XPS. The tribological results showed that both ionic liquids used as additive decrease friction and wear but the BMPFAP had a better performance than the (NEMM)MOEFAP due to its higher reactivity with the steel.
In an effort to standardize perioperative management and improve postoperative outcomes of adult patients undergoing surgery, the Ministry of Health, through the Spanish Multimodal Rehabilitation ...Group (GERM), and the Aragonese Institute of Health Sciences, in collaboration with multiple Spanish scientific societies and based on the available evidence, published in 2021 the Spanish Intensified Adult Recovery (RICA) guideline. This document includes 12 perioperative measures related to fluid therapy and hemodynamic monitoring. Fluid administration and hemodynamic monitoring are not straightforward but are directly related to postoperative patient outcomes.
The Fluid Therapy and Hemodynamic Monitoring Subcommittee of the Hemostasis, Transfusion Medicine and Fluid Therapy Section (SHTF) of the Spanish Society of Anesthesiology and Critical Care (SEDAR) has reviewed these recommendations and concluded that they should be revised as they do not follow an adequate methodology.
En un esfuerzo por estandarizar el manejo perioperatorio y mejorar los resultados posoperatorios de los pacientes adultos sometidos a cirugía, el Ministerio de Sanidad, a través del Grupo Español de Rehabilitación Multimodal (GERM) y el Instituto Aragonés de Ciencias de la Salud, en colaboración con diversas sociedades científicas españolas, y sobre la base de la evidencia disponible, publicó en 2021 la guía Recuperación intensificada en cirugía del adulto (RICA). Dicho documento incluye 12 medidas perioperatorias relacionadas con la fluidoterapia y la monitorización hemodinámica. La administración de fluidos y la monitorización hemodinámica no son sencillas, pero están directamente relacionadas con los resultados de los pacientes.
El Subcomité de Fluidoterapia y monitorización hemodinámica de la Sección de Hemostasia, Medicina transfusional y Fluidoterapia (SHTF) de la Sociedad Española de Anestesiología y Reanimación (SEDAR) ha analizado dichas recomendaciones, concluyendo que deberían ser revisadas, ya que no siguen la metodología adecuada.
Perioperative fluid management, a critical aspect of major surgeries, is characterized by pronounced stress responses, altered capillary permeability, and significant fluid shifts. Recognized as a ...cornerstone of enhanced recovery protocols, effective perioperative fluid management is crucial for optimizing patient recovery and preventing postoperative complications, especially in high-risk patients. The scientific literature has extensively investigated various fluid infusion regimens, but recent publications indicate that not only the volume but also the type of fluid infused significantly influences surgical outcomes. Adequate fluid therapy prescription requires a thorough understanding of the physiological and biochemical principles that govern the body’s internal environment and the potential perioperative alterations that may arise. Recently published clinical trials have questioned the safety of synthetic colloids, widely used in the surgical field. A new clinical scenario has arisen in which crystalloids could play a pivotal role in perioperative fluid therapy. This review aims to offer evidence-based clinical principles for prescribing fluid therapy tailored to the patient’s physiology during the perioperative period. The approach combines these principles with current recommendations for enhanced recovery programs for surgical patients, grounded in physiological and biochemical principles.
Research in fluid therapy and perioperative hemodynamic monitoring is difficult and expensive. The objectives of this study were to summarize these topics and to prioritize these topics in order of ...research importance.
Electronic structured Delphi questionnaire over three rounds among 30 experts in fluid therapy and hemodynamic monitoring identified through the Fluid Therapy and Hemodynamic Monitoring Subcommittee of the Hemostasis, Transfusion Medicine and Fluid Therapy Section of the Spanish Society of Anesthesiology and Critical Care.
77 topics were identified and ranked in order of prioritization. Topics were categorized into themes of crystalloids, colloids, hemodynamic monitoring and others. 31 topics were ranked as essential research priority. To determine whether intraoperative hemodynamic optimization algorithms based on the invasive or noninvasive Hypotension Prediction Index versus other management strategies could decrease the incidence of postoperative complications. As well as whether the use of renal stress biomarkers together with a goal-directed fluid therapy protocol could reduce hospital stay and the incidence of acute kidney injury in adult patients undergoing non-cardiac surgery, reached the highest consensus.
The Fluid Therapy and Hemodynamic Monitoring Subcommittee of the Hemostasis, Transfusion Medicine and Fluid Therapy Section of the Spanish Society of Anesthesiology and Critical Care will use these results to carry out the research.
La investigación sobre fluidoterapia y monitorización hemodinámica perioperatorias es difícil y costosa.
Los objetivos del presente estudio fueron resumir y priorizar estas cuestiones, en orden de importancia investigadora.
Cuestionario estructurado electrónico Delphi a lo largo de tres rondas entre 30 expertos en fluidoterapia y monitorización hemodinámica identificados a través del Subcomité de Fluidoterapia y Monitorización hemodinámica de la Sección de Hemostasis, Medicina Transfusional y Fluidoterapia de la Sociedad española de Anestesiología y Reanimación.
Se identificaron 77 cuestiones, que se clasificaron en orden de priorización. Las cuestiones se categorizaron en temas de cristaloides, coloides, monitorización hemodinámica y otros. Se categorizaron 31 cuestiones como de prioridad investigadora esencial, para determinar si los algoritmos de optimización hemodinámica intraoperatorios basados en el Índice de predicción de hipotensión invasivo o no invasivo frente a otras estrategias de manejo podrían reducir la incidencia de complicaciones postoperatorias, así como si el uso de biomarcadores del estrés renal junto con un protocolo de fluidoterapia dirigido por objetivos podría reducir la estancia hospitalaria y la incidencia de insuficiencia renal aguda en pacientes adultos sometidos a cirugía no cardiaca, lográndose el más alto consenso.
El Subcomité de Fluidoterapia y Monitorización hemodinámica de la Sección de Hemostasis, Medicina Transfusional y Fluidoterapia de la Sociedad española de Anestesiología y Reanimación utilizará estos resultados para la realización de investigación.
Overview of the pandemic In December 2019, a new virus named SARS-CoV-2 was reported in Wuhan province, China. The first case of COVID-19 in Mexico was confirmed on February 28, 2020, and the World ...Health Organization declared the pandemic on March 11.
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We have adapted the model of two consecutive pairs to the study of the triplet-doublet (T-D) interaction in molecular crystals. We have applied this model to the modulation of the photoconductivity ...in crystalline anthracene by a static magnetic field (MFE) and a microwave field (PDMR). We were able to reproduce, for the first time, quite perfectly two types of experiments with the same set of kinetic constants.
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