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Resumo Objetivo Avaliar e comparar as fórmulas CKD-EPI, BIS1 e MDRD e o limiar diagnóstico de 45 e 60 ml/min/1,73m2 em pacientes idosos. Método Estudo observacional do tipo transversal, de caráter descritivo e analítico. Foram incluídos pacientes atendidos em ambulatório de referência entre janeiro/2020 e junho/2022, com idade ≥65 anos. Foram excluídos pacientes com apenas uma dosagem de creatinina ou com alterações transitórias da TFG. Resultados Observou-se que entre o grupo de pacientes com idade entre 65-74 anos e 75-84 anos as estimativas da TFG feitas pela fórmula CKD-EPI foram superiores às fórmulas BIS1 e MDRD. Enquanto, no grupo de pacientes com 85-94 anos a CKD-EPI não apresentou diferença quando comparada com MDRD, permaneceu com estimativas maiores apenas quando comparada com a BIS1. Observamos maior dispersão entre CKD-EPI e BIS1, mostrando menor concordância entre essas fórmulas, confirmada pelo teste Kappa (76,7%) e a concordância quase perfeita entre CKD-EPI e MDRD. Conclusão A fórmula BIS1 apresentou melhor correlação da diminuição da TFGe conforme o avanço das faixas etárias, podendo-se relacionar com o processo de envelhecimento renal fisiológico, podendo ser uma ferramenta auxiliar na estimativa da TFG em idosos, auxiliando no diagnóstico mais preciso da DRC, assim como, no planejamento de intervenções que possam retardar a progressão da DRC e prever risco de mortalidade por doenças cardiovasculares.

Abstract Objective To evaluate and compare the CKD-EPI, BIS1 and MDRD formulas and diagnostic thresholds of 45 and 60 ml/min/1.73m2 in older patients. Method A cross-sectional, descriptive, analytical observational study was conducted. Patients aged ≥65 years treated at a referral outpatient clinic between January 2020 and June 2022, were assessed. Patients with only one creatinine level or with transient GFR abnormalities were excluded. Results The GFR estimates using the CKD-EPI formula were higher than both the BIS1 and MDRD formulas in patient groups aged 65-74 years and 75-84 years. In the group of patients aged 85-94 years, the CKD-EPI showed no difference when compared with the MDRD, yielding higher estimates only compared with the BIS1. Greater dispersion was found between the CKD-EPI and BIS1, showing less agreement between these formulas, as confirmed by the Kappa test (76.7%), while there was almost perfect agreement between the CKD-EPI and MDRD. Conclusion The BIS1 formula showed stronger correlation of the decrease in eGFR with advancing age, reflecting the physiological renal aging process and serving as a potentially useful tool for estimating GFR in older adults. The formula can help provide a more accurate diagnosis of CKD and aid planning of interventions to slow the progression of CKD and predict the risk of mortality from cardiovascular diseases.

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The rapid molecular test (RMT) performed on the GeneXpert® system is widely used as a control strategy and surveillance technique for tuberculosis (TB). In the region of the Americas, TB incidence is slowly increasing owing to an upward trend in Brazil, which is among the high TB-burden countries (HBCs), ranking in the 19th position. In this context, we aimed to (i) describe the implementation and history of RMT-TB (Xpert® MTB/RIF and Xpert® MTB/RIF Ultra) in Brazil; (ii) to evaluate the national RMT laboratory distribution, TB, and resistance to RIF detection by RMT; and (iii) to correlate these data with Brazilian TB incidence. The quantitative data of Xpert® MTB/RIF and Xpert® MTB/RIF Ultra assays performed in the pulmonary TB investigation from 2014 to 2020 were provided by the Brazilian Ministry of Health. A spatial visualization using ArcGIS software was performed. The Southeast region constituted about half of the RMT laboratories-from 39.4% to 45.9% of the total value over the five regions. Regarding the federal units, the São Paulo state alone represented from 20.2% to 34.1% (5.0 to 8.5 times the value) of RMT laboratories over the years observed. There were significant differences (p < 0.0001) in the frequency of RMT laboratories between all years of the historical series. There was an unequal distribution of RMT laboratories between Brazilian regions and federal units. This alerts us for the surveillance of rapid molecular detection of TB in different parts of the country, with the possibility of improving the distribution of tests in areas of higher incidence in order to achieve the level of disease control recommended by national and worldwide authorities.

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Arboviruses, such as yellow fever virus (YFV), dengue virus (DENV), and chikungunya virus (CHIKV), present wide global dissemination and a pathogenic profile developed in infected individuals, from non-specific clinical conditions to severe forms, characterised by the promotion of significant lesions in different organs of the harbourer, culminating in multiple organ dysfunction. An analytical cross-sectional study was carried out via the histopathological analysis of 70 samples of liver patients, collected between 2000 and 2017, with confirmed laboratory diagnoses, who died due to infection and complications due to yellow fever (YF), dengue fever (DF), and chikungunya fever (CF), to characterise, quantify, and compare the patterns of histopathological alterations in the liver between the samples. Of the histopathological findings in the human liver samples, there was a significant difference between the control and infection groups, with a predominance of alterations in the midzonal area of the three cases analysed. Hepatic involvement in cases of YF showed a greater intensity of histopathological changes. Among the alterations evaluated, cell swelling, microvesicular steatosis, and apoptosis were classified according to the degree of tissue damage from severe to very severe. Pathological abnormalities associated with YFV, DENV, and CHIKV infections showed a predominance of changes in the midzonal area. We also noted that, among the arboviruses studied, liver involvement in cases of YFV infection was more intense.

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BACKGROUND: The inferior vena cava is the most frequently injured vascular structure in penetrating abdominal trauma. We aimed to review inferior vena cava injury cases treated at a limited resources facility and to discuss the surgical management for such injures. METHODS: This was a retrospective study of patients with inferior vena cava injuries who were treated at a single center between January 2011 and January 2020. Data pertaining to the following were assessed: demographic parameters, hypovolemic shock at admission, the distance that the patient had to be transported to reach the hospital, affected anatomical segment, treatment, concomitant injuries, complications, and mortality. Non-parametric data were analyzed using Fisher's exact, Chi-square, Mann-Whitney, or Kruskal-Wallis test, as applicable. The Student's t-test was used to assess parametric data. Moreover, multiple logistic regression analyses (including data of possible death-related variables) were performed. Statistical significance was set at P <0.05. RESULTS: Among 114 patients with inferior vena cava injuries, 90.4% were male, and the majority were aged 20-29 years. Penetrating injuries accounted for 98.2% of the injuries, and the infrarenal segment was affected in 52.7% of the patients. Suturing was perfomed in 69.5% and cava ligation in 29.5% of the patients, and 1 patient with retrohepatic vena cava injury was managed non-operatively. The overall mortality was 52.6% with no case of compartment syndrome in the limbs. A total of 7.9% of the patients died during surgery. CONCLUSION: The inferior vena cava is often injured by penetrating mechanisms, and the most frequently affected segment was the infrarenal segment. A higher probability of death was not associated with injury to a specific anatomical segment. Additionally, cava ligation was not related to an increased probability of compartment syndrome in the leg; therefore, prophylactic fasciotomy was not supported.

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Resumo: Introdução: A pandemia da Covid-19 trouxe diversos desafios para as instituições de ensino superior (IES) de todos os países. Nesse contexto, destacou-se a necessidade de reestruturação do processo de ensino-aprendizagem de forma a garantir a aquisição real de conhecimentos, bem como o desenvolvimento de métodos de estudo para que os discentes conseguissem conviver com o ensino remoto emergencial (ERE) e seus contratempos. Objetivo: Este estudo teve como objetivo investigar como ocorreu o estudo dirigido e a percepção dos discentes quanto aos ganhos de habilidades de autogestão durante o ERE. Método: Trata-se de um estudo transversal quantitativo e qualitativo, realizado com 93 estudantes de Medicina de diferentes IES brasileiras. Utilizou-se questionário semiestruturado para a coleta dos dados. Os dados foram processados no software Iramuteq, e utilizaram-se análise de similitude e nuvem de palavras, além de estatística descritiva. Resultado: Em relação ao tempo dedicado ao estudo dirigido, 59,1% dos estudantes relataram que o estabeleceram, e 57,0% afirmaram que traçaram estratégias para melhor geri-lo; 68,8% mencionaram que perceberam diferenças ao compararem os métodos de fixação de conteúdo utilizados antes e durante no ERE, e, desses, 70,3% consideraram que essas novas técnicas foram eficientes. Na análise qualitativa, analisaram-se seis corpora monotemáticos, relacionados à opinião sobre o que auxiliou e o que prejudicou a gestão das emoções e do tempo, quais estratégias de fixação de conteúdo foram utilizadas e quais habilidades de autogestão foram desenvolvidas no período do ERE. Conclusão: Evidenciou-se que, apesar das dificuldades encontradas, elas foram superadas com a adoção de estratégias centradas no desenvolvimento de habilidades de autogestão de tempo, emoções e fixação de conteúdo por parte dos estudantes, e, dessa forma, pode-se inferir que eles perceberam o desenvolvimento de algumas das habilidades essenciais para superar os novos e recentes desafios impostos pelas mudanças no planeta, como organização pessoal, dos estudos e do tempo, além das relacionadas às emoções e ao gerenciamento de recursos tecnológicos.

Abstract: Introduction: The Covid-19 pandemic presented several challenges to Higher Education Institutions (HEIs) in all countries. In this context, there is a prominent need to restructure the teaching-learning process in order to guarantee genuine knowledge acquisition, as well as the development of study methods to enable students to deal with the emergency remote teaching (ERT) and its setbacks. Objective: To investigate directed study was implemented and how students viewed the gains in self-management skills during ERT. Method: Quantitative and qualitative cross-sectional study, conducted with 93 medical students from different Brazilian HEIs. A semi-structured questionnaire was used for data collection. The data were processed using the IRAMUTEQ software, similarity analysis and word cloud, in addition to the use of descriptive statistics. Results: In relation to the time dedicated to directed study, 59.1% of the students reported having established it and 57.0% said they had outlined strategies to better manage this time; 68.8% reported having perceived differences when comparing the learning consolidation methods used before and during ERT and, of these, 70.3% considered that these new techniques were efficient. In the qualitative analysis, six monothematic corpora were analysed, relating to opinions on what helped and what hindered emotional and time management, which learning consolidation strategies were used and which self-management skills were developed during ERT. Conclusion: It was demonstrated that the difficulties encountered were overcome through the adoption of strategies to help students develop self-management skills in relation to time, emotions and learning consolidation. It can therefore be inferred that students successfully mastered some of the essential skills to overcome new and recent challenges imposed by changes in the world, such as their personal organization, studies and time, in addition to those related to emotions and management of technological resources.

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The transmission and evolution of leprosy depends on several aspects, including immunological and genetic factors of the host, as well as genetic factors of Mycobacterium leprae. The present study evaluated the association of single nucleotide polymorphisms (SNPs) on the FokI (rs2228570), TaqI (rs731236), ApaI (rs7975232) regions of the vitamin D receptor (VDR) gene with leprosy. A total of 405 individuals were evaluated, composed by groups of 100 multibacillary (MB) and 57 paucibacillary (PB) patients, and 248 healthy contacts. Blood samples were collected from patients and contacts. The genotyping was performed by sequencing of the interest regions. The alleles of the studied SNPs, and SNP FokI genotypes, were not associated with leprosy. For the SNP on TaqI region, the relationship between the tt genotype, and for the SNP ApaI, the AA genotype, revealed an association with susceptibility to MB form, while Aa genotype with protection. The extended genotypes AaTT and AaTt of ApaI and TaqI were associated with protection against MB form. Further studies analyzing the expression of the VDR gene and the correlation with its SNPs might help to clarify the role of polymorphisms on the immune response in leprosy.

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BACKGROUND: Medium and large animal models allow researchers to evaluate the efficacy and safety of cardiovascular procedures in systems that resemble human anatomy and can be used to simulate scenarios for training purposes. Although porcine models have been used extensively, many physiological and anatomical features remain unknown or only superficially described. OBJECTIVES: To describe the normal porcine vascular anatomy on computed tomography scans, compare it to human vascular anatomy, and discuss the application of porcine models for open and endovascular procedures. METHODS: Three male Landrace pigs underwent computed tomography. The vascular anatomy of the neck, thorax, abdomen, and limbs was analyzed and described; relevant similarities and differences between porcine and human vascular anatomies and the implications for vascular procedures in pigs are highlighted. RESULTS: The carotid territory, aortic arch, and terminal aorta branches all show marked differences in pigs compared to their human counterparts. Compressions of both left renal and common iliac veins were detected, analogous to those seen in human Nutcracker and May-Thurner syndromes. Vascular measurements (diameters, lengths, and angles) of several different porcine territories are presented. CONCLUSIONS: The data presented should be useful for planning preclinical trials and basic research and for refining surgical training using porcine models in vascular fields.

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Surgical site infection (SSI) following caesarean section is associated with increased morbidity, mortality, and significant health care costs. This study evaluated the epidemiological, clinical, and microbiological features of Acinetobacter spp. in women with SSIs who have undergone caesarean section at a referral hospital in the Brazilian Amazon region. This study included 69 women with post-caesarean SSI by Acinetobacter spp. admitted to the hospital between January 2012 and May 2015. The 69 Acinetobacter isolates were subjected to molecular species identification, antimicrobial susceptibility testing, detection of carbapenemase-encoding genes, and genotyping. The main complications of post-caesarean SSI by Acinetobacter were inadequate and prolonged antibiotic therapy, sepsis, prolonged hospitalization, and re-suture procedures. A. baumannii, A. nosocomialis and A. colistiniresistens species were identified among the isolates. Carbapenem resistance was associated with OXA-23-producing A. baumannii isolates and IMP-1-producing A. nosocomialis isolate. Patients with multidrug-resistant A. baumannii infection showed worse clinical courses. Dissemination of persistent epidemic clones was observed, and the main clonal complexes (CC) for A. baumannii were CC231 and CC236 (Oxford scheme) and CC1 and CC15 (Pasteur scheme). This is the first report of a long-term Acinetobacter spp. outbreak in women who underwent caesarean section at a Brazilian hospital. This study demonstrates the impact of multidrug resistance on the clinical course of post-caesarean infections.

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Molecular-typing can help in unraveling epidemiological scenarios and improvement for disease control strategies. A literature review of Mycobacterium tuberculosis transmission in Brazil through genotyping on 56 studies published from 1996-2019 was performed. The clustering rate for mycobacterial interspersed repetitive units - variable tandem repeats (MIRU-VNTR) of 1,613 isolates were: 73%, 33% and 28% based on 12, 15 and 24-loci, respectively; while for RFLP-IS6110 were: 84% among prison population in Rio de Janeiro, 69% among multidrug-resistant isolates in Rio Grande do Sul, and 56.2% in general population in São Paulo. These findings could improve tuberculosis (TB) surveillance and set up a solid basis to build a database of Mycobacterium genomes.

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BACKGROUND: The evaluation of procedures for drug susceptibility prediction of Mycobacterium tuberculosis based on genomic data against the conventional reference method test based on culture is realistic considering the scenario of growing number of tools proposals based on whole-genome sequences (WGS). OBJECTIVES: This study aimed to evaluate drug susceptibility testing (DST) outcome based on WGS tools and the phenotypic methods performed on isolates of M. tuberculosis Lineage 1 from the state of Pará, Brazil, generally associated with low levels of drug resistance. METHODOLOGY: Culture based DST was performed using the Proportion Method in Löwenstein-Jensen medium on 71 isolates that had been submitted to WGS. We analysed the seven main genome sequence-based tools for resistance and lineage prediction applied to M. tuberculosis and for comparison evaluation we have used the Kappa concordance test. FINDINGS: When comparing the WGS-based tools against the DST, we observed the highest level of agreement using TB-profiler. Among the tools, TB-profiler, KvarQ and Mykrobe were those which identified the largest number of TB-MDR cases. Comparing the four most sensitive tools regarding resistance prediction, agreement was observed for 43 genomes. MAIN CONCLUSIONS: Drug resistance profiling using next-generation sequencing offers rapid assessment of resistance-associated mutations, therefore facilitating rapid access to effective treatment.

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