Publications by authors named "Flavio Freitas"

Purpose: We compared the immediate and sustained effects of 500 mL of crystalloid administered at slow (333 mL/h) versus fast rates (999 mL/h) on mean arterial pressure (MAP) in critically ill patients.

Materials And Methods: Hemodynamic variables were collected immediately before and every 30 min up to 60 min after the end of the infusion. The primary outcome was the adjusted difference in MAP.

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Objective: To evaluate whether changes in central venous pressure during fluid expansion and baseline cyclic respiratory variation in the central venous pressure amplitude (RespCVP) curve could be used to discriminate between fluid responders and nonresponders.

Methods: This prospective observational study included critically ill adult patients who underwent fluid expansion in the form of a fluid bolus or fluid challenge with crystalloids. All patients were under mechanical ventilation and adequately sedated.

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Objective: To identify the feeling of helplessness in assisted reproduction patients, along with the experience in the out patient surgical center of an assisted reproduction clinic.

Methods: A prospective study of care and psychological interventions performed in the outpatient surgical center (OSC) of the assisted reproduction clinic from January 2019 to December 2022. Patients are first seen by the nursing staff.

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Extensive research in the last few decades has conclusively demonstrated the significant influence of experimental conditions, surfactants, and synthesis methods on semiconductors' properties in technological applications. Therefore, in this study, the synthesis of molybdenum oxide (MoO) was reported by the addition of 2.5 (MoO_2.

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Objective: To evaluate the prevalence of burnout among the intensive care unit team of a university hospital after the second wave of COVID-19 and identify the key factors associated with its development.

Methods: This single-center study included 395 employees from a multidisciplinary team. The participants completed a questionnaire based on the Maslach Burnout Inventory.

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Purpose: To assess the effect of antisense therapy to block kallikrein-kinin pathway in COVID-19 patients.

Material And Methods: Randomized, placebo-controlled, double blind, controlled trial enrolling hospitalized COVID-19 patients that required supplementary oxygen to sustain peripheral oxygen saturation. Key exclusion criteria included use of mechanical ventilation or vasopressors, and patients with more than 10 days since symptom onset or more than 48 h of oxygen use.

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Dye effluents cause diverse environmental problems. Methylene blue (MB) dye stands out since it is widely used in the textile industry. To reduce the pollution caused by the MB, we developed biosorbents from tucumã seeds, where the in natura seeds were treated with NaOH (BT) and HPO (AT) solutions and characterized by Boehm titration, point of zero charges, FTIR, TGA, BET, and SEM.

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Purpose Of Review: Herein, we conducted a review of the literature to better understand the issue of prolonged emergency department (ED) boarding by providing an overview of the current evidence on the available causes, consequences, and mitigation strategies.

Recent Findings: Severely ill patients awaiting transfer to intensive care units (ICU) imposes additional burdens on the emergency care team from both a clinical and management perspective. The reasons for prolonged ED boarding are multifactorial.

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Background: The optimal amount for initial fluid resuscitation is still controversial in sepsis and the contribution of non-resuscitation fluids in fluid balance is unclear. We aimed to investigate the main components of fluid intake and fluid balance in both survivors and non-survivor patients with septic shock within the first 72 hours.

Methods: In this prospective observational study in two intensive care units, we recorded all fluids administered intravenously, orally, or enterally, and losses during specific time intervals from vasopressor initiation: T1 (up to 24 hours), T2 (24 to 48 hours) and T3 (48 to 72 hours).

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Although the placement of an intraventricular catheter remains the gold standard method for the diagnosis of intracranial hypertension (ICH), the technique has several limitations including but not limited to its invasiveness. Current noninvasive methods, however, still lack robust evidence to support their clinical use. We aimed to estimate, as an exploratory hypothesis generating analysis, the discriminative power of four noninvasive methods to diagnose ICH.

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Background: Nosocomial sepsis is a major healthcare issue, but there are few data on estimates of its attributable mortality. We aimed to estimate attributable mortality fraction (AF) due to nosocomial sepsis.

Methods: Matched 1:1 case-control study in 37 hospitals in Brazil.

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Article Synopsis
  • The study aimed to investigate the impact of using balanced solutions compared to saline on short-term outcomes for traumatic brain injury patients in the BaSICS trial.
  • A total of 483 patients were enrolled, with findings indicating that those receiving balanced solutions had a high probability of increased 90-day mortality and fewer days free from intensive care.
  • The conclusion suggests a strong link between balanced solution use and worse outcomes, especially for patients with more severe brain injuries (Glasgow coma scale score ≤ 6).
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Optimal infusion rate for fluid challenges in critically ill patients is unknown. A large clinical trial comparing two different infusion rates yielded neutral results. Conditional average treatment effect (CATE) assessment may aid in tailoring therapy.

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Objective: To evaluate clinical outcomes and factors associated with mortality, focusing on secondary infections, in critically ill patients with COVID-19 in three Brazilian hospitals during the first pandemic wave.

Methods: This was a retrospective observational study involving adult patients with COVID-19 admitted to one of the participating ICUs between March and August of 2020. We analyzed clinical features, comorbidities, source of SARS-CoV-2 infection, laboratory data, microbiology data, complications, and causes of death.

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Perovskites are in the hotspot of material science and technology. Outstanding properties have been discovered, fundamental mechanisms of defect formation and degradation elucidated, and applications in a wide variety of optoelectronic devices demonstrated. Advances through adjusting the bulk-perovskite composition, as well as the integration of layered and nanostructured perovskites in the devices, allowed improvement in performance and stability.

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Background: Police officers are exposed to specific occupational tasks, which require lifting, trunk flexion and rotation, carrying weight, and frequent standing periods, which may be associated with an increased risk of experiencing low back pain (LBP).

Objective: To describe the prevalence and intensity of chronic LBP (CLBP) in Brazilian Federal Highway Police officers (FHPO) from the Rio Grande do Sul state and evaluate its associated factors.

Methods: A total of 208 FHPOs participated in this study.

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Objective: To analyze the mortality trend from all causes in Brazilian federal highway police officers from 2001 to 2020.

Methods: This is an ecological time-series study based on mortality official data from the Brazilian federal highway police registry system and death certificates from the federal registry system. Deaths of active police officers from 2001 to 2020 were assessed.

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Purpose: To reanalyze the results of the Balanced Solutions in Intensive Care Study (BaSICS) through hierarchical endpoint analysis with win ratio.

Methods: All patients with full data in BaSICS trial were elected for the analysis. BaSICS compared balanced solutions (Plasma Lye 148) versus 0.

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In this study, the multi-marker approach was used for the first time with a highly urbanized lake located in the city of Fortaleza, Brazil, to provide a comprehensive view of temporal trends in sources of pollutants and evaluate the relation between the influence of anthropogenic activities and socioeconomic development. Total concentrations of the markers analyzed ranged from 21.0 to 103.

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Sodium is the main cation present in the extracellular fluid. Sodium and water content in the body are responsible for volume and osmotic homeostasis through mechanisms involving sodium and water excretion and intake. When body sodium content decreases below the homeostatic threshold, a condition termed sodium deficiency, highly motivated sodium seeking, and intake occurs.

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The effects of balanced crystalloid versus saline on clinical outcomes for ICU patients may be modified by the type of fluid that patients received for initial resuscitation and by the type of admission. To assess whether the results of a randomized controlled trial could be affected by fluid use before enrollment and admission type. Secondary analysis of the BaSICS (Balanced Solution in Intensive Care Study) trial, which compared a balanced solution (Plasma-Lyte 148) with 0.

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Article Synopsis
  • The study aimed to compare the wave morphology of intracranial pressure (ICP) measured via standard intraventricular catheter and a new noninvasive monitor (ICPni) in stroke patients.
  • Data from 18 patients were analyzed, focusing on two key parameters of ICP wave morphology: time-to-peak (TTP) and the P2/P1 ratio, with the goal of assessing the accuracy of the ICPni monitor in detecting intracranial hypertension.
  • Results showed strong correlation for the P2/P1 ratio and moderate for TTP between the two methods, indicating that the noninvasive method may be a reliable alternative for monitoring ICP in clinical settings.
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Sepsis is a global health emergency, which is caused by various sources of infection that lead to changes in gene expression, protein-coding, and metabolism. Advancements in "omics" technologies have provided valuable tools to unravel the mechanisms involved in the pathogenesis of this disease. In this study, we performed shotgun mass spectrometry in peripheral blood mononuclear cells (PBMC) from septic patients (N=24) and healthy controls (N=9) and combined these results with two public microarray leukocytes datasets.

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Importance: Slower intravenous fluid infusion rates could reduce the formation of tissue edema and organ dysfunction in critically ill patients; however, there are no data to support different infusion rates during fluid challenges for important outcomes such as mortality.

Objective: To determine the effect of a slower infusion rate vs control infusion rate on 90-day survival in patients in the intensive care unit (ICU).

Design, Setting, And Participants: Unblinded randomized factorial clinical trial in 75 ICUs in Brazil, involving 11 052 patients requiring at least 1 fluid challenge and with 1 risk factor for worse outcomes were randomized from May 29, 2017, to March 2, 2020.

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