Currently, in the scientific health research (SHR) field, there is a narrow focus in the pursuit of highly ranked journals with higher impact factors, based on citation models and journal ratings. This limitation often leads to undervalue the relevance of scientific studies by prioritizing citation impact. This limitation is a direct result of the funding needs inherent in the fields of natural sciences and engineering, where investments in equipment and infrastructures are considerably higher compared to other research areas. In the present article, the authors aimed to contribute to SHR by combining Marketing concepts, particularly the Segmentation, Targeting, and Positioning model (STP Marketing model), to the development of scientific research projects in the healthcare sector. By applying these concepts in research projects design and researchers career progression, a more comprehensive understanding can be achieved of how individuals or institutes are perceived. Furthermore, the implementation of effective STP Marketing strategies will enable researchers and institutes to gain a competitive advantage in the market by treating articles as products that require strategic positioning in a highly competitive environment. Ultimately, researchers should keep in mind that their ultimate audience is the journals audience they are targeting, as their objective is to publish in a journal that aligns with their specific goals.

ABSTRACT Introduction: Transfusion of red blood cells is recurrent in cardiac surgery despite the well-established deleterious effects. Identifying patients with higher chances of requiring blood transfusion is essential to apply strategic preventive measures to reduce such chances, considering the restricted availability of this product. The most used risk scores to predict blood transfusion are the Transfusion Risk and Clinical Knowledge (TRACK) and Transfusion Risk Understanding Scoring Tool (TRUST). However, these scores were not validated for the Brazilian population. The objective of this study was to assess the accuracy of TRACK and TRUST scores in estimating the need for postoperative transfusion of red blood cell concentrates (TRBCC) after cardiac surgery. Methods: A clinical retrospective study was conducted using the database of a Brazilian reference service composed of patients operated between November 2019 and September 2021. Scores were compared using Mann-Whitney U test. Hosmer-Lemeshow goodness of fit test assessed calibration of the scores. Accuracy was assessed using the area under the receiver operating characteristic curve (AUC). All analyses considered a level of significance of 5%. The study was approved by the research ethics committee (CAAE 55577421.4.0000.5201). Results: This study assessed 498 patients. Only the TRACK score presented good calibration (P=0.238; TRUST P=0.034). AUC of TRACK was 0.678 (95% confidence interval 0.63 to 0.73; P<0.001), showing a significant accuracy. Conclusion: Between the scores analyzed, only the TRACK score showed a good calibration, but low accuracy, to predict postoperative TRBCC after cardiac surgery.

ABSTRACT Sugarcane is one of Brazil's leading crops, and the transshipment harvesting operation represents a significant portion of operating costs. Among the primary machines used in harvesting is the tractor-transshipment set, with considerable energy demands. This study focused on evaluating the gear selection effect in an agricultural tractor on operational performance and costs during the sugarcane transshipment operation. The treatments consisted of four operational work gears at different engine speeds: r1 – 1150 rpm, r2 – 1230 rpm, r3 – 1360 rpm, and r4 – 1500 rpm on the engine. The analyzed variables were volumetric and specific fuel consumption, operational efficiency, and operational cost. The variables were adapted from ASABE (2011) methodology, and the data were submitted to parametric statistics and regression analysis. The rotation engine selection in tractors directly affected fuel consumption with positive angular coefficients and r2 between 0.92-0.96. Fuel consumption reduces by 37.5%, adopting 1150 rpm compared to 1500 rpm rotation. The highest rotation (1500 rpm - r4) increased the volumetric and productive fuel consumption, enabling savings up to reduced fuel cost by 1.08 US$ ha -1 . Thus, training sugarcane transshipment operators is essential to optimize the production process efficiency and reduce costs.

Resumo O Programa Criança Feliz (PCF) atinge 1,4 milhão de crianças brasileiras menores de três anos com visitas domiciliares visando o desenvolvimento neuropsicomotor. Com base em modelo conceitual, avaliou-se implementação e impacto do PCF em estudo randomizado, em 30 municípios. Ao todo 3.242 crianças foram alocadas para o grupo intervenção (GI) ou controle (GC), sendo 80,0% acompanhadas prospectivamente durante três anos. O desenvolvimento foi avaliado pelo Ages and Stages Questionnaire (ASQ3). Análises por intenção de tratar mostraram escores médios de 203,3 no GI e 201,3 no GC. Análises adicionais com variáveis instrumentais e emparelhamento por escores de propensão tampouco mostraram efeito, uma vez que o número de contatos recebidos não esteve associado aos escores ASQ3. Tampouco foi observado impacto sobre estimulação, interações responsivas ou atributos psicológicos das crianças. As visitas foram interrompidas durante 12 meses devido à COVID-19, sendo substituídas por contatos virtuais. O estudo de implementação revelou baixa cobertura no GI, contaminação do GC, deficiências na gestão e baixa qualidade das visitas em muitos municípios. O estudo não demonstrou impacto do PCF implementado sob condições de rotina e fornece elementos para seu aprimoramento.

Abstract The Happy Child Program (Programa Criança Feliz - PCF, in Portuguese) reaches 1.4 million Brazilian children under three years of age with home visits aimed at promoting neuropsychomotor development. Based on a conceptual model, PCF implementation and impact were evaluated in a randomized study in 30 municipalities. A total of 3,242 children were allocated to the intervention (IG) or control (CG) group, 80.0% of whom were prospectively followed up from late 2018 to late 2021. Development was assessed by the Ages and Stages Questionnaire (ASQ3). During the three-year study period, visits were replaced by virtual contacts for an average of 12 months due to COVID-19. At the endline survey, intent-to-treat analyses showed mean scores of 203.3 in the IG and 201.3 in the CG. Additional analyses using instrumental variables and propensity scores matching also showed no effect, since the number of contacts with the program was not associated with ASQ3 scores. No impact was observed on stimulation, responsive interactions or psychological attributes of children. The implementation study revealed low coverage in the IG, contamination of the CG, deficiencies in management and low quality of visits in many municipalities. The study did not demonstrate an impact of PCF implemented under routine conditions, but provides elements for its improvement.

Resumo A revolução digital nos serviços de saúde veio disponibilizar novas oportunidades para o desenvolvimento da qualidade da prestação de cuidados, investigação de novos tratamentos e uma melhor utilização dos recursos. A maioria da informação que presentemente é partilhada digitalmente, anteriormente era partilhada em papel, suscitando, assim, novos desafios e ameaças digitais ao nível da segurança e privacidade. Existiam cerca de 28 leis de proteção de dados diferentes baseados na EU Data Protection Directive de 1995, a qual foi desenhada há 20 anos atrás, antes da introdução generalizada da Internet e do crescimento das preocupações com a privacidade. Apesar dos avanços tecnológicos, a regulamentação existente permaneceu estagnada e cada vez mais inadequada para proteger os dados dos indivíduos ou das organizações. Dada esta necessidade foi desenvolvido e aprovado o Regulamento 2016/679, do Parlamento Europeu e do Conselho, de 27 de abril de 2016, relativo à proteção das pessoas singulares no que diz respeito ao tratamento de dados pessoais e à livre circulação desses dados. O Regulamento Geral sobre a Proteção de Dados veio introduzir alterações significativas ao enquadramento legal da proteção de dados pessoais dentro da União Europeia, estabelecendo regras relativas à proteção das pessoas singulares no que diz respeito ao tratamento de dados pessoais e à livre circulação desses dados. Estas alterações devem influenciar o modo de tratamento dos dados de saúde pelas entidades prestadoras de cuidados de saúde, quer no âmbito da prestação de cuidados de saúde quer para efeitos de investigação.

Abstract The digital revolution in health services has provided new opportunities for the development of quality care, research of new treatments, and better usage of resources. Most of the information that is currently digitally shared was previously shared on paper, thus raising new security and privacy challenges and digital threats. There were about 28 different data protection laws based on the 1995 EU Data Protection Directive, which was drawn up 20 years ago, before the widespread introduction of the Internet and growing privacy concerns. Despite technological advances, the existing regulation has remained stagnant and increasingly inadequate to protect individual or organizational data. Given this need, the Regulation 2016/679 of the European Parliament and Council of 27 April 2016 was elaborated and approved. The General Data Protection Regulation introduced significant changes to the legal framework for the protection of personal data within the European Union, laying down rules on the protection of individuals regarding the processing of personal data and its free movement. These changes should influence the way health care providers handle health data, both in the provision of healthcare and for research purposes.

Resumo Introdução: Nas últimas duas décadas, a abordagem de tratamento de aneurisma da aorta abdominal (AAA) mudou drasticamente de cirurgia aberta para cirurgia endovascular. A diminuição de cirurgia de AAA convencional , open aneurysm repair (OAR), levanta preocupações relativamente à competência dos futuros cirurgiões vasculares para executar este procedimento complexo e de alto risco. O principal objetivo deste estudo foi avaliar as tendências de tratamento de AAA entre internos de Cirurgia Vascular, ao longo de 15 anos, a nível nacional. Métodos: Identificação dos médicos que terminaram o internato de Angiologia e Cirurgia Vascular entre 2002 e 2017, inclusive, a nível nacional e colheita dos dados através da consulta dos currículos para a prova final de conclusão do internato complementar. Foram avaliados o total de cirurgias por AAA, tanto por OAR e por EVAR e contabilizadas aquelas realizadas como 1º cirurgião. A correlação entre o número de cirurgias abertas de AAA e o ano de conclusão do internato complementar foi testada usando o coeficiente de correlação de Spearman. Resultados: Em Portugal, de 2002-2017, apesar de não se verificar variabilidade no número total de OAR realizados, verificou-se um decréscimo marcado naqueles realizados como 1º cirurgião (rho=-0,363; P<0.02). No final do internato em 2007, um interno de Cirurgia Vascular realizava em média 15 casos de OAR e em 2007 a média foi de apenas 7 casos. Por outro lado, constatou-se um aumento marcado no número total de procedimentos de EVAR (rho=0,478; P<0.02) bem como aqueles realizados como 1ºcirurgião (rho=0,540; P<0.01). Conclusão: O presente estudo revela que os internos de Cirurgia Vascular, a nível nacional, se encontram expostos a progressivamente menos casos de OAR e verifica-se uma diminuição significativa nos procedimentos de OAR como 1º cirurgião.

Abstract Introduction: Surgical site infections are associated with devastating consequences in vascular surgery patients but the data on Methicillin Resistant Staphylococcus aureus (MRSA) infection among those remains scant and conflicting. Most vascular surgery antibiotic prophylaxis assume that all patients submitted to surgery are tested prior to the intervention or that all patients with risk factors for MRSA are presumed to be colonized. However, the costs associated with testing all patients are not negligible, and most of the vascular surgery patients have risk factors for MRSA colonization. The purpose of this study was to evaluate the burden of MRSA clinical infection and its outcome and to adjust clinical practice accordingly. Methods: A retrospective analysis of clinical data from all patients with MRSA isolations that were submitted to vascular surgery in the year 2019 was conducted. The primary endpoint was in-hospital mortality. Secondary endpoints were timing of infection (pre-existent infection or post-surgical infection), need for ICU and length of hospital stay. Results: Out of 1681 patients admitted for surgery in the year 2019 in the vascular surgery ward, only 21 had clinical infection with positive MRSA isolates. All the patients had risk factors for MRSA colonization. Seventeen were admitted for PAD (Rutherford grade 5 or 6). Eight patients had post-operatory infections, whilst the remaining presented with MRSA infection prior to the intervention. Post-operatory infections ranged from superficial incisional in three patients, deep incisional in one patient, and organ/space/prosthesis infection in four patients (of the last group, two had prosthesis infection). There were five deaths, of which two were unrelated to the infection. Of the three deaths probably infection-related, all were post-operatory surgical site infections, and all were organ/space/prosthesis infections (one with prosthesis infection). There was no patient admitted to the ICU that survived. The mean hospital stay was increased by 26 days (31 days, 95% CI, 19-43). Conclusion: Infection by MRSA was less frequent than expected in our population, which may mean that colonization might be smaller than expected. Pre-operative infection was almost always related to chronic wounds and did not increase the risk of post-operative wound infection or death, contrary to post-operative infection, which seems to significantly increase mortality.

Abstract Introduction: Phlegmasia cerulea (PC) is a severe form of deep vein thrombosis. In the setting of massive venous thrombosis and severe ischemia, catheter-directed thrombolysis (CDT) or trombectomy is mandatory. We report three cases of women with PC managed with venous thrombectomy after failure of CDT. Case reports: 1: 20 years-old, with recent intake of oral contraceptive, referred with acute onset of limb swelling, pain and a cold left lower extremity associated with foot pallor, paresthesia and numbness. Doppler ultrasound revealed occlusive thrombosis of the entire deep venous system and the great saphenous vein (GSV). Anticoagulation (AC) and CDT were started. However due to increasing levels of transaminases, creatine kinase and myoglobin, CTD was stopped and venous thrombectomy was proposed. A retrievable inferior vena cava filter (IVC) was implanted and venous surgical trombectomy. The completion venography showed a Cockett compression that was treated with stenting of the left iliac vein. Thrombophilia tests were positive for anticardiolipin antibodies an hyperhomocysteinemia. At 3-years follow-up, the patient is asymptomatic and under AC. The 3-year Doppler showed normal patency for the iliac stent and a mild femoropopliteal vein insuffiency. 2: 19 year-old, taking oral contraceptives, with acute onset of PCD with acute thrombus in the left iliac, femoral, popliteal veins. CDT was started at admittance but stopped after two days because of very low values of serum fibrinogen and persistence of occlusive thrombus in the iliac vein. A retrievable IVC filter was placed and the thrombus removed with surgical thrombectomy. Phlebography showed no significant residual thrombus and no signs of compression were present. At 1 month follow-up, the patient presented without leg edema or venous claudication symptoms. Thrombophilia testing is awaited. 3: 54 year-old who presented with low back pain, worsening left leg pain and swelling with a cyanosed and colder foot. At doppler ultrasound there were monophasic arterial flow in the left leg. After exclusion of arterial embolism, the first therapeutic approach was CDT, but it was also stopped due to very low fibrinogen levels and an ineffective thrombus lysis in venography controls. After implantation of a retrievable IVC, surgical thrombectomy via femoral vein was performed, with successful thrombus removal. Venography showed Cockett syndrome and a stent was implanted. At 6 months the patient remained without major symptoms, and Doppler confirmed stent patency with non residual obstruction or venous insufficiency. Conclusion: Awareness and timely diagnosis of phlegmasia cerulea is necessary to ensure prompt intervention to prevent loss of limb. When CDT is not effective, surgical thrombectomy remains successfully alternative. Iliac venous stenting complement is also crucial to treat associated Cockett syndrome. Endovascular thrombectomy devices may be a reasonable alternative to surgical thrombectomy.

Abstract The ionospheric investigations have improved our understanding of the space weather role in the upper atmosphere conditions, particularly at higher latitudes where the geospace phenomena print their signatures. The simultaneous observations using multi-instruments have improved our knowledge of the coupling processes inside the ionosphere, and their connection with the magnetosphere and neutral atmosphere processes under the space weather phenomena. The ionosphere probing at EACF started on 1986 using an analogical very low frequency (VLF) system, and after the year 2004 using digital VLF system, global navigation satellite system (GNSS), riometers and Canadian digital ionosonde (CADI). This paper presents the different radio techniques that have been used at Brazilian Antarctic Station Comandante Ferraz (EACF) to characterize the ionospheric conditions, and the highlights of the studies using multi-instrument observations performed in the last few decades.

ABSTRACT Introduction: Transfusion of red blood cells is recurrent in cardiac surgery despite the well-established deleterious effects. Identifying patients with higher chances of requiring blood transfusion is essential to apply strategic preventive measures to reduce such chances, considering the restricted availability of this product. The most used risk scores to predict blood transfusion are the Transfusion Risk and Clinical Knowledge (TRACK) and Transfusion Risk Understanding Scoring Tool (TRUST). However, these scores were not validated for the Brazilian population. The objective of this study was to assess the accuracy of TRACK and TRUST scores in estimating the need for postoperative transfusion of red blood cell concentrates (TRBCC) after cardiac surgery. Methods: A clinical retrospective study was conducted using the database of a Brazilian reference service composed of patients operated between November 2019 and September 2021. Scores were compared using Mann-Whitney U test. Hosmer-Lemeshow goodness of fit test assessed calibration of the scores. Accuracy was assessed using the area under the receiver operating characteristic curve (AUC). All analyses considered a level of significance of 5%. The study was approved by the research ethics committee (CAAE 55577421.4.0000.5201). Results: This study assessed 498 patients. Only the TRACK score presented good calibration (P=0.238; TRUST P=0.034). AUC of TRACK was 0.678 (95% confidence interval 0.63 to 0.73; P<0.001), showing a significant accuracy. Conclusion: Between the scores analyzed, only the TRACK score showed a good calibration, but low accuracy, to predict postoperative TRBCC after cardiac surgery.

Abstract The Happy Child Program (Programa Criança Feliz - PCF, in Portuguese) reaches 1.4 million Brazilian children under three years of age with home visits aimed at promoting neuropsychomotor development. Based on a conceptual model, PCF implementation and impact were evaluated in a randomized study in 30 municipalities. A total of 3,242 children were allocated to the intervention (IG) or control (CG) group, 80.0% of whom were prospectively followed up from late 2018 to late 2021. Development was assessed by the Ages and Stages Questionnaire (ASQ3). During the three-year study period, visits were replaced by virtual contacts for an average of 12 months due to COVID-19. At the endline survey, intent-to-treat analyses showed mean scores of 203.3 in the IG and 201.3 in the CG. Additional analyses using instrumental variables and propensity scores matching also showed no effect, since the number of contacts with the program was not associated with ASQ3 scores. No impact was observed on stimulation, responsive interactions or psychological attributes of children. The implementation study revealed low coverage in the IG, contamination of the CG, deficiencies in management and low quality of visits in many municipalities. The study did not demonstrate an impact of PCF implemented under routine conditions, but provides elements for its improvement.

Resumo O Programa Criança Feliz (PCF) atinge 1,4 milhão de crianças brasileiras menores de três anos com visitas domiciliares visando o desenvolvimento neuropsicomotor. Com base em modelo conceitual, avaliou-se implementação e impacto do PCF em estudo randomizado, em 30 municípios. Ao todo 3.242 crianças foram alocadas para o grupo intervenção (GI) ou controle (GC), sendo 80,0% acompanhadas prospectivamente durante três anos. O desenvolvimento foi avaliado pelo Ages and Stages Questionnaire (ASQ3). Análises por intenção de tratar mostraram escores médios de 203,3 no GI e 201,3 no GC. Análises adicionais com variáveis instrumentais e emparelhamento por escores de propensão tampouco mostraram efeito, uma vez que o número de contatos recebidos não esteve associado aos escores ASQ3. Tampouco foi observado impacto sobre estimulação, interações responsivas ou atributos psicológicos das crianças. As visitas foram interrompidas durante 12 meses devido à COVID-19, sendo substituídas por contatos virtuais. O estudo de implementação revelou baixa cobertura no GI, contaminação do GC, deficiências na gestão e baixa qualidade das visitas em muitos municípios. O estudo não demonstrou impacto do PCF implementado sob condições de rotina e fornece elementos para seu aprimoramento.

Resumo Introdução: A síndrome hemolítica urêmica atípica (SHUa) é um distúrbio raro caracterizado pela tríade de anemia hemolítica microangiopática, trombocitopenia e lesão renal aguda, afetando principalmente crianças em idade pré-escolar. O objetivo deste estudo foi descrever perfil clínico, manejo e desfecho em longo prazo dos pacientes com SHUa genética admitidos em um centro terciário de nefrologia pediátrica durante 20 anos. Métodos: Realizamos análise retrospectiva dos registros clínicos de todos os pacientes com SHUa menores de 18 anos com mutações genéticas identificadas. Revisaram-se dados sobre características clínicas, estudo genético, intervenções terapêuticas e desfechos em longo prazo. Resultados: Incluíram-se cinco casos de SHUa com uma mutação genética identificada; sendo todos casos inaugurais, o mais jovem tendo 4 meses de idade. A mutação no gene do fator H do complemento foi identificada em quatro pacientes. Plasmaférese terapêutica foi realizada para tratamento agudo em 4 pacientes, um dos quais também necessitou terapia renal substitutiva aguda (diálise peritoneal). Todos os pacientes tiveram remissão completa, 2 mais de uma recidiva, mas apenas 1 evoluiu para doença renal crônica durante acompanhamento (mediana (percentil 25°-75°), 136 (43,5-200,5) meses). Conclusão: Em crianças, o prognóstico da função renal parece ser fortemente dependente do histórico genético, sendo crucial realizar estudo genético em todos os casos de SHUa. Em nossa coorte, 2 pacientes apresentaram mutações genéticas não descritas anteriormente. Inovações recentes no campo genético que levaram à identificação de novas mutações conduziram a um melhor entendimento da patogênese SHUa, mas são necessários mais estudos, focando na correlação genótipo-fenótipo, com períodos de acompanhamento mais longos.

Abstract Introduction: Atypical hemolytic uremic syndrome (aHUS) is a rare disorder characterized by the triad of microangiopathic hemolytic anemia, thrombocytopenia, and acute kidney injury, which primarily affects preschool-aged children. This study’s aim was to describe the clinical profile, management, and long-term outcome of the genetic aHUS patients admitted to a tertiary care pediatric nephrology center during 20 years. Methods: We performed a retrospective analysis of the clinical records of all aHUS patients younger than 18 years with identified genetic mutations. Data on clinical features, genetic study, therapeutic interventions, and long-term outcomes were reviewed. Results: Five cases of aHUS with an identified genetic mutation were included; all were inaugural cases with the youngest being 4 months old. Complement factor H gene mutation was identified in four patients. Therapeutic plasma exchange was performed for acute management in 4 patients, one of whom also needed acute renal replacement therapy (peritoneal dialysis). All patients went on complete remission, 2 had more than one relapse but only 1 of these progressed to chronic kidney disease during the follow-up period (median (25th-75th percentile), 136 (43.5-200.5) months). Conclusion: In children, the prognosis of renal function seems to be strongly dependent on the genetic background, thus being crucial to perform genetic study in all aHUS cases. In our cohort, 2 patients presented genetic mutations not previously described. Recent innovations on the genetic field leading to the identification of new mutations has lead to a better understanding of aHUS pathogenesis, but further studies, focusing on the genotype-phenotype correlation, with longer follow-up periods, are needed.

Resumo Introdução: A endoprótese Nellix® (Endologix Inc., Irvine CA) é composta por dois stents expansíveis por balão envolvidos por endobags preenchidos por um polímero, obliterando assim o saco aneurismático - Endovascular Aneurysm Sealing (EVAS). Inicialmente, pelas suas propriedades, foi introduzida com instruções para uso (IFU) alargadas, possibilitando a utilização em Aneurismas da Aorta Abdominal (AAA) de anatomia mais complexa. Porém, durante a experiência com esta endoprótese, foi descrito um elevado número de complicações, levando à restrição progressiva das IFU. Atualmente, o seu uso livre foi descontinuado e apenas está disponível em centros selecionados e para efeitos investigacionais. O objetivo deste estudo é reportar os resultados institucionais da utilização da endoprótese Nellix® no contexto de AAA. Material e Métodos: Realizou-se um estudo retrospectivo referente a doentes tratados a AAA utilizando a endoprótese Nellix® numa instituição terciária universitária. Foram incluídos todos os casos eletivos e urgentes, identificados através da consulta de registos clínicos da instituição. Foram excluídos casos de aneurisma toraco-abdominal. Os dados referentes às características de base, procedimento realizado, curso do internamento e seguimento pós hospitalar foram obtidos por consulta dos processos clínicos. Foram analisados como endpoints o sucesso técnico e clínico aos 30 dias, assim como complicações e intervenções secundárias a médio e longo prazo. Resultados: Entre 2015 e 2017, a esta endoprótese foi utilizada em 12 doentes, 9 homens e 3 mulheres, com média de 71(±8) anos. As comorbilidades mais frequentemente associadas foram HTA (n=12), tabagismo (n=7), cardiopatia isquémica (n=7), DAOP (n=6) e DRC (n=6). Em todos os doentes a indicação foi aneurisma primário degenerativo, com uma excepção, cuja indicação foi a presença de endoleak (EL) tipo 1a pós-EVAR prévio. Dez doentes foram submetidos a cirurgia eletiva e dois a cirurgia urgente, ambos por aneurisma sintomático. Três eram aneurismas aortoilíacos e os restantes aórticos (n=9), sendo que 3 tinham envolvimento de pelo menos uma artéria renal. Nove doentes foram submetidos a EVAS sem procedimentos complementares; os restantes a EVAS com chimney (ChEVAS) para as renais e/ou artéria mesentérica superior (n=3). O diâmetro médio pré-operatório era de 57mm (±6.5mm). Num doente tratou-se concomitantemente um aneurisma popliteu através do implante de stent coberto. Aos 30 dias verificou-se o óbito em 2 doentes submetidos a ChEVAS. As complicações mais frequentes foram Insuficiência Respiratória (n=3) e LRA com necessidade de diálise (n=3), sendo que em dois houve oclusão intencional das artérias renais (doentes com DRC terminal em pré-diálise). Neste período, houve uma reintervenção, por isquémia aguda de membro por trombose aguda de stent popliteu, tratada com sucesso com trombólise dirigida por catéter.Após os 30 dias, verificou-se o óbito em 4 doentes (sobrevivência aos 2 anos de 60%, SE=.154). As complicações verificadas foram EL tipo 1a (n=3), EL 1b (n=1) e trombose de stent aórtico (n=1). Dois doentes foram submetidos a intervenção secundária: um submetido a pontagem femoro-femoral cruzada por trombose de stent e outro a explantação protésica e reconstrução in-situ através de pontagem aorto-bifemoral. No último, verificou-se o óbito no pós-operatório precoce. Dois doentes aguardam intervenção secundária por EL tipo 1a e crescimento do saco. O diâmetro médio do saco aneurismático no último exame ou pré-intervenção secundária era 59mm (±10.6mm). O tempo médio de follow-up é de 2.3(±1.6) anos. Conclusões: Na nossa instituição, a utilização da endoprótese Nellix® está associada a elevada taxa de complicações perioperatórias e a médio prazo, com elevada taxa de complicações relacionadas com o aneurisma, sendo o EL tipo 1a a mais frequente. Apesar de atualmente o uso livre da endoprótese estar descontinuado, os doentes que foram submetidos previamente a EVAS carecem de um plano de vigilância específico e mais intensivo, para deteção e correção atempada de complicações.

Abstract Introduction: Nellix® endoprosthesis (Endologix Inc., Irvine, CA) is composed by two ballon-expandable stents surrounded by endobags, which are filled with a polymer, thus obliterating the aneurysmal sac - Endovascular Aneurysm Sealing (EVAS). Initially, due to its properties, was introduced with extended IFU, allowing the use in more complex abdominal aortic aneurysms. However, during the initial experience with this endoprosthesis, a high number of poor outcomes have been described, leading to the progressive restriction of IFU. Currently, it has been discontinued and is only available in selected centers for clinical research purposes. Our study aim to report the institutional results of the use of the Nellix® endoprosthesis in the treatment of AAA. Material and Methods: A retrospective study was designed, including patients with AAA treated with Nellix® endoprosthesis treated at a universitary tertiary care facility. Elective and urgent patients we&apos;re included, and patients we&apos;re identified through the institutional files. Thoraco-abdominal aneurysm we&apos;re excluded. Data about baseline characteristics, surgery, hospitalization course and follow-up post discharge was obtained by consulting personal clinical files. Primary endpoints are technical and clinical success at 30 days, as complications and secondary interventions at mid and long-term. Results: Between 2015 and 2017, this endoprosthesis was used in 12 patients, 9 male and 3 female, with a mean age of 71 (±8) years. The most common comorbidities associated we&apos;re hypertension (n=12), current or former tobacco use (n=7), coronary heart disease (n=7), peripheral artery disease (n=6) and chronic kidney disease (n=6) In all patients, the treatment indication was primary degenerative aneurysm, with one exception, which was the presence of type 1a EL after EVAR. Ten patients underwent elective and 2 urgent surgery due to symptomatic aneurysm. Three we&apos;re aortoiliac aneurysms and the remaining aortic aneurysms (n=9) with three having involvement of at least one renal artery. Nine patients underwent conventional EVAS; the remaining EVAS with chimney (ChEVAS) for the renal artery(ies) or superior mesenteric artery (n=3). The average preoperative diameter was 57(±6.5) mm. One patient was simultaneously submitted to endovascular repair of a popliteal artery aneurysm with covered stent. By 30 days, death occurred in 2 patients, all submitted to ChEVAS. The most common post-operative complications we&apos;re respiratory failure (n=3), AKI with dialysis (n=3), being that in two patients there was intentional covering of the renal arteries (patients with pre-dialysis CKD). In this time frame, we verified one reintervention: catheter-directed thrombolysis for acute limb ischemia due to popliteal covered stent thrombosis. After 30 days, 4 deaths occured (2 year survival 60%, SE 0.154). The most common complications were type 1a EL(n=3), type 1b EL(n=1) and aortic stent thrombosis (n=1). Two patients have already been reintervened: one submitted to femoro-femoral crossover bypass and the other to surgical endoprosthesis explantation and in situ reconstruction aortobifemoral bypass. The last was deceased in the early postoperative period. Two patients are waiting reintervention for type Ia EL and aneurysmal sac growth. The average sac diameter in last follow-up or before secondary intervention was 59(±10.6) mm. Mean follow-up time is 2,3(±1,6) years. Conclusions: In our institution, the use of Nellix® endoprosthesis is associated with a high rate of perioperative morbidity and mid to long-term aneurysm-related complications, being type Ia EL the most common. Although the free use of the endoprosthesis is currently discontinued, patients who have previously undergone EVAS lack a specific and more intensive surveillance plan for the timely detection and correction of complications.

Resumo Introdução: A doença do coronavírus de 2019 (COVID-19) e consequente período de confinamento teve um impacto significativo no sistema nacional de saúde, com restrições em toda a actividade clínica - actividade assistencial na consulta, exames complementares de diagnóstico e número e tipo de intervenções cirúrgicas. A apreensão dos doentes em recorrer aos cuidados médicos e aos hospitais levou a admissões tardias, e na nossa percepção, a apresentações mais graves da patologia de base, nomeadamente na Isquémia Crítica de Membro (ICM). A necessidade de testar os doentes previamente a uma cirurgia não-emergente aumentou o tempo de referenciação inter- e intra-hospitalar, o que, somando à diminuição dos tempos cirúrgicos e da disponibilidade de vagas em unidades de cuidados intensivos, potencialmente prejudicou os resultados. O objectivo deste estudo é avaliar objetivamente o tipo de patologia que foi tratado durante o estado de emergência e comparar o desfecho dos procedimentos cirúrgicos com o mesmo período em 2018 e 2019. Métodos: Foi realizada uma análise retrospectiva dos processos clínicos dos doentes submetidos a cirurgia nos meses de Março e Abril do ano de 2020 e foi feita a comparação com o mesmo período dos dois anos prévios. O endpoint primário foi mortalidade aos 30 dias ou intra-hospitalar. Os endpoints secundários foram classificação patológica e do grau de isquémia, taxa de amputação, nível de amputação, tipo de cirurgia (aberta, endovascular ou híbrida), tempo de internamento e re-intervenção. Resultados: Foram operados 98 doentes no Período COVID (PC) comparado com 286 no Período Não-COVID (PNC). Não houve diferenças estatisticamente significativas na idade (70 anos (17-98) no PC vs. 69 (17-92) no PNC, p=.13) ou sexo dos doentes operados (76% masculino (n=74) no PC vs. 70% (n=196) no PNC, p=.26). Também não houve diferença estatisticamente significativa na mortalidade (5% (n=5) no PC vs. 5% (n=13) no PNC, p=.88). Houve uma diminuição estatisticamente significativa da cirurgia aberta (43% (n=42) no PC vs. 57% (n=164) no PNC, p=.04). Não houve diferenças significativas no tempo de internamento hospitalar (10 (0-77) dias no PC vs. 7 (0-118) no PNC, p=.6) e na taxa de re-intervenção (18% (n=18) no PC vs. 16% (n=45) no PNC, p=.58). A Doença Arterial Periférica (DAP) correspondeu a 75% (n=73) das admissões no PC, vs. 48% (n=137) no grupo PNC (p=.02). A ICM correspondeu a 99% (n=70) das admissões por DAP no PC, vs. 93% (n=114) no PNC (p=.1), com um aumento significativo da proporção de doentes cuja apresentação na admissão foi de grau 5 ou 6 de Rutherford (81% (n=57) vs. 68% (n=77), p=.03). Houve ainda uma diminuição sem significado estatístico da taxa de amputação (35% (n=25) no PC vs. 40% (n=49) no PNC, p=.49) com um aumento não significativo da taxa de amputação major (52% (n=13) no PC vs. 39% (n=19) no PNC, p=.27). O segundo grupo de patologia mais tratado foi a doença aneurismática da aorta e artérias ilíacas, mas houve uma diminuição estatisticamente significativa do número de doentes tratados (5% (n=5) no PC vs. 13% (n=36) no PNC, p=.05). Todos os aneurismas da aorta tratados durante o PC estavam em rotura (100% (n=5) vs. 42% (n=15) in the NCP, p=0.2). Não houve diferenças significativas entre os grupos na mortalidade por reparação urgente de aneurismas (60% (n=3) no PC vs. 47% (n=7) no PNC, p=.77). Conclusão: As restrições impostas pela COVID-19 manifestaram-se principalmente no tipo de patologia tratado e no número de doentes operados. A apresentação mais grave da patologia de base, manifestada por graus de isquémia crítica mais avançados, não aumentou a mortalidade nem se reflectiu de forma significativa nas taxas de amputação. A doença aneurismática da aorta foi a segunda patologia mais tratada, mas com uma diminuição significativa do número total de casos, sem diferença significativa na mortalidade.

Abstract Introduction/Objectives: The Corona Virus Disease of 2019 (COVID-19) has taken a major toll on the public health system, with restrictions in all clinical activity, from consultations and exams to number and type of surgeries. Patients apprehension to resort to medical aid and hospitals leads to late admissions and, in our perception, more severe presentations of the underlying pathology, namely, in Chronic limb threatening ischemia (CLTI). Need for testing prior to non-emergent surgery causes larger delays in the referral of patients, and this, added to the reduction of surgical times and ICU availability, potentially results in worse outcomes. The aim of this study was to objectively evaluate the type pathology that was treated during the emergency state and to compare the outcome of the surgical procedures with the same period of 2018 and 2019. Methods: A retrospective analysis of the patient charts from patients submitted to surgery in the months of March and April of the year 2020 was conducted and compared to the same period on the previous two years. The primary endpoint was death at 30 days or during hospital stay and the secondary endpoints were pathology classification, grade of ischemia, amputation, amputation level, type of surgery (endovascular, conventional or hybrid), time of hospital stay and reintervention. Results: There were 98 patients submitted to surgery in the COVID period (CP), compared to 286 in the Non-COVID period (NCP). There was no significant difference in the age (70 years (17-98) in the CP vs. 69 (17-92) in the NCP, p=.13) or sex profile of the patients (76% male (n=74) in the CP vs. 70% (n=196) in the NCP, p=.26). There was no statistical difference in mortality (5% (n=5) in the CP vs. 5% (n=13) in the NCP, p=.88). There was a statistically significant decrease in conventional surgery (43% (n=42) in the CP vs. 57% (n=164) in the NCP, p=.04), but no statistically significant difference in length of hospital stay(10 (0-77) days in the CP vs. 7 (0-118) in the NCP, p=.6), and reintervention (18% (n=18) in the CP vs. 16% (n=45) in the NCP, p=.58). PAD corresponded to 75% (n=73) of the admissions in the CP vs. 48% (n=137) in the NCP, p=.02. CLTI corresponded to 99% (n=70) of the PAD population in the CP, vs. 93% (n=114) in the NCP, p=.1, with a significant increase in the number of patients presenting with Rutherford Grades 5 and 6 (81% (n=57) in the CP, vs. 68% (n=77) in the NCP, p=.03). There was a non-significant decrease in amputation rate (35% (n=25) vs. 40% (n=49), p=.49) and increase of major limb amputation (52% (n=13) vs. 39% (n=19), p=.27). The second most frequent pathology was aneurysmal aortic and iliac disease, but there was a statistically significant reduction in the number of patients treated (5% (n=5) in the CP vs. 13% (n=36) in the NCP, p=.05). All aortic aneurysms treated in 2020 were ruptured (100% (n=5) vs. 42% (n=15) in the NCP, p=0.2). There was no significant difference in mortality in urgent aortic aneurysm repair between groups (60% (n=3) in the CP vs. 47% (n=7) in the NCP, p=.77). Conclusions: COVID-19 restrictions manifested mainly in the type of pathology treated and the number of patients operated on. The gravity of the underlying pathology, manifested by more serious wounds and advanced CLTI at presentation, did not increase mortality nor was reflected on limb amputations rates. Aortic and iliac aneurismal disease was the second most common pathology treated but with a significant decrease in total number of cases and no significant difference in mortality.