Abstract Background Evaluation and treatment of primary and secondary headaches is a global public health challenge. Recognizing the epidemiological impact of headaches, a group of researchers linked to the Brazilian Headache Society proposed the Brazilian Headache Registry and drew up its initial protocol. Objective Here we describe the methods and preliminary data obtained from the pilot study. Methods This was a multicenter longitudinal observational study conducted between September 2020 and August 2021. Prospective data were collected in three specialist centers for headache care in states in southern and southeastern Brazil. Patients aged 18 years or older who sought care for headache in tertiary centers and who agreed to participate in the study, were considered eligible. Results Sixty-six patients were included in the pilot study: 43 (65%) from Rio Grande do Sul state and 23 (35%) from Minas Gerais state. Overall, 90% were female, and the subjects' mean age was 38.2 ± 11.2 years. Primary headaches accounted for 85.3% of the diagnoses made. Among secondary headaches, medication overuse headache was the most frequent type (7.1%). Conclusions The pilot study showed the feasibility of the research protocol developed for tertiary centers. The Brazilian Headache Registry will form a source of longitudinal data with the aim of contributing to better characterization of the various phenotypes of patients with primary and secondary headaches, and to detailing the use of health resources and identifying predictors of better clinical outcomes.

Resumo Antecedentes A avaliação e o tratamento das cefaleias primárias e secundárias são um desafio global de saúde pública. Reconhecendo o impacto epidemiológico das cefaleias, um grupo de pesquisadores vinculados à Sociedade Brasileira de Cefaleia propôs a criação de um Registro Brasileiro de Cefaleia e elaborou seu protocolo inicial. Objetivo Nesta publicação descrevemos os métodos e dados preliminares obtidos a partir do estudo piloto. Métodos Trata-se de um estudo prospectivo observacional longitudinal multicêntrico, realizado entre setembro de 2020 e agosto de 2021. Foram coletados dados em três centros especializados no atendimento de cefaleia, em estados da região sul e sudeste do Brasil. Pacientes com idade igual ou superior a 18 anos que procuraram os centros terciários por queixa de cefaleia e concordaram em participar do estudo foram considerados elegíveis. Resultados Sessenta e seis pacientes foram incluídos no estudo piloto, 43 (65%) do Rio Grande do Sul e 23 (35%) de Minas Gerais. Da amostra total, 90% eram do sexo feminino e a idade média dos sujeitos foi de 38,2 ± 11,2 anos. As cefaleias primárias representaram 85,3% dos diagnósticos realizados. Entre as cefaleias secundárias, a cefaleia por uso excessivo de medicamentos foi a mais frequente (7,1%). Conclusões O estudo piloto evidenciou a viabilidade do protocolo de pesquisa desenvolvido para centros terciários. O Registro Brasileiro de Cefaleia constituirá uma fonte de dados longitudinais com o objetivo de contribuir para melhor caracterização dos diversos fenótipos de pacientes com cefaleias primárias e secundárias, detalhar o uso de recursos de saúde e identificar preditores de melhores desfechos clínicos.

Abstract This paper presents a model that uses bio-inspired optimization algorithms to control of the mutual coupling (MC) in Multiple-Input Multiple-Output (MIMO) systems. The method promotes an increase in the channel throughput and a reduction in the distance among the array elements, searching values less than a half wavelength. A microstrip antenna design, at the frequency of 26 GHz, is used as a prototype for MIMO system testing and performance analysis. Genetic Algorithm (GA) is used to optimize, to determine the antenna physical parameters and to improve its performance. The mutual impedance concept is used to model the MC. The particle swarm optimization (PSO) algorithm is used to optimize the channel throughput and to reduce the distance between the elements. Simulation results show that it is possible to obtain a MIMO system performance improvement of 11.1% in channel throughput, the microstrip width is reduced by 14.5% and the distance among the elements can be reduced by 23.7%, considering the MC.

ABSTRACT The objective of this work was to characterize reference bacteria strains, belonging to the genus Bacillus and species of correlated genera, by simplified morphological and biochemical methods. The morphological characterization is based on the aspects of the colonies, as well as cytomorphology of the species, by optical and scanning microscopy. For biochemical characterization, the sensitivity test to antimicrobials by disk-diffusion is performed. Moreover, the strains were characterized by extracting intracellular proteins. Characteristics such as shape, color, and consistency of the colonies, in addition to the type of spore and production of protein crystals were determinants for the morphological characterization of these species. The antibiogram revealed high resistance to β-lactam group antibiotics, in species of Bacillus cereus s.l group. In Bacillus subtilis s.l. group there was high susceptibility to antibiograms, mainly for species of B. subtilis. The protein profile provided specific protein patterns for some species, mainly bands of 130 e 65 kDa for B. thuringiensis, 140 e 130 kDa for Lysinibacillus sphaericus, and 115 kDa for Brevibacillus laterosporus. Our results showed that the morphological and biochemical characterizations, provided a simple identification, with easy interpretation, and low cost.

Abstract Hyporthodus niveatus is an appreciated and valuable commercial fish species in the municipality of Niterói, state of Rio de Janeiro, Brazil, due its excellent quality flesh. The constant presence of helminths in the abdominal musculature, viscera and serosa of individuals of the species has been the subject of complaints among local fish traders because of economic losses due to their repugnant aspect. Considering their hygienic-sanitary importance and significance for collective health, the presence of helminths was investigated in 20 individual fish of H. niveatus purchased from fish markets in the municipality of Niterói in 2021-2022. Nematodes, identified as third-instar larvae of Contracaecum sp., Terranova sp., Hysterothylacium deardorffoverstreetorum and Raphidascaris sp., were found parasitizing the intestine and abdominal cavity. Acanthocephalans, identified as juveniles of Corynosoma australe, were found parasitizing the intestine. The highest parasitic indices were for H. deardorffoverstreetorum, with prevalence of 30%, mean intensity of 1.5, mean abundance of 0.45 and infection ranges of 1-2. Considerations about the zoonotic potential and hygienic-sanitary significance of these parasites are presented in order to increase food safety for consumers.

ABSTRACT Objectives: to analyze the production of knowledge in research articles about the effectiveness of nursing protocols for reducing indwelling urinary catheter dwell time and catheter-associated urinary tract infection rate in hospitalized adult and older patients. Methods: an integrative review of three full articles, available in the MEDLINE Complete - EBSCO, Scopus and Web of Science databases, from 01/01/2015 to 04/26/2021. Results: the three protocols reduced infection rates, and from the review/synthesis of their knowledge, a level IV body of evidence emerged to compose the nursing care process aimed at reducing indwelling urinary catheter dwell time and catheter-associated urinary tract infection. Final Considerations: this process gathers scientific evidence to support the elaboration of nursing protocols and, consequently, the conduction of clinical trials on its effectiveness in reducing urinary tract infection by indwelling urinary catheter.

RESUMEN Objetivos: analizar la producción de conocimiento a partir de artículos de investigación sobre la efectividad de los protocolos de enfermería para reducir la estancia de una sonda vesical y la tasa de infección del tracto urinario relacionada con el catéter en adultos y ancianos hospitalizados. Métodos: revisión integradora de tres artículos completos, en las bases de datos MEDLINE Complete (EBSCO), Scopus y Web of Science, del 01/01/2015 al 26/04/2021. Resultados: los tres protocolos redujeron las tasas de infección y, de la revisión/síntesis de sus conocimientos, surgió un cuerpo de evidencia de nivel IV para componer el proceso de atención de enfermería, con el objetivo de reducir la permanencia de sonda vesical y la infección asociada. Consideraciones Finales: este proceso reúne evidencias científicas para apoyar la elaboración de protocolos de enfermería y, consecuentemente, la realización de ensayos clínicos sobre su efectividad en la reducción de la infección por sonda vesical permanente.

RESUMO Objetivos: analisar a produção do conhecimento de artigos de pesquisas acerca da efetividade de protocolos de enfermagem para redução do tempo de permanência de sonda vesical de demora e da taxa de infecção do trato urinário relacionada ao cateter em pacientes adultos e idosos hospitalizados. Métodos: revisão integrativa de três artigos na íntegra, nas bases de dados MEDLINE Complete (EBSCO), Scopus e Web of Science, no período de 01/01/2015 a 26/04/2021. Resultados: os três protocolos reduziram as taxas de infecção, e, da revisão/síntese de seu conhecimento, emergiu um corpo de evidências de nível IV para compor o processo de cuidar de enfermagem, visando à redução da permanência do cateter e da infecção associada. Considerações Finais: esse processo reúne evidências científicas para subsidiar a elaboração de protocolos de enfermagem e, consequentemente, a condução de ensaios clínicos sobre sua eficácia na redução de infecção do trato urinário por sonda vesical de demora.

Abstract Background Atherosclerosis risk factors can have different impacts on cardiovascular diseases and on the anatomical distribution of Peripheral Arterial Disease (PAD). Objectives To study the influence of atherosclerosis risk factors on the anatomical distribution of PAD in patients with chronic limb-threatening ischemia (CLTI). Methods We performed an observational, cross-sectional, and analytical study that included 476 hospitalized patients with CLTI due to PAD. We compared the presence of atherosclerosis risk factors (age, gender, diabetes mellitus, smoking, and hypertension) in patients with PAD involving three different anatomic areas (aortoiliac, femoropopliteal, and infrapopliteal). Multivariate analysis was performed to identify associations between atherosclerosis risk factors and PAD distribution. Results The mean age of the 476 patients was 69 years, 249 (52%) were men, and 273 (57%) had diabetes. Seventy-four percent (353) had minor tissue loss. Multivariate analysis identified three risk factors associated with PAD anatomical distribution (gender, smoking, and DM). Women had a 2.7 (CI: 1.75-4.26) times greater chance of having femoropopliteal disease. Smokers had a 3.6-fold (CI: 1.54-8.30) greater risk of aortoiliac disease. Diabetic patients were 1.8 (CI: 1.04-3.19) times more likely to have isolated infrapopliteal occlusive disease. Conclusions The study showed that gender, DM, and smoking impact on the anatomical distribution of PAD in patients with CLTI. Diabetic patients were more likely to have only infrapopliteal disease, women had a greater risk of femoropopliteal PAD, and smokers had a greater risk of aortoiliac occlusive disease.

Resumo Contexto Os fatores de risco para aterosclerose podem ter influência distinta nas doenças cardiovasculares, impactando também no território da doença arterial periférica (DAP). Objetivos Estudar a influência dos diferentes fatores de risco para a aterosclerose na distribuição anatômica da DAP em pacientes com isquemia crítica crônica de membros (ICCM). Métodos Foi realizado um estudo observacional, transversal e analítico, incluindo 476 doentes internados devido à ICCM por DAP. Foram estudados, comparativamente, os pacientes com DAP dos três distintos territórios anatômicos (aortoilíaco, femoropoplíteo e infragenicular) em relação à presença dos fatores de risco para a aterosclerose (idade, gênero, diabetes mellitus, tabagismo e hipertensão arterial). A análise multivariada foi realizada para testar a associação entre os fatores de risco e a distribuição anatômica da DAP. Resultados A média de idade dos pacientes foi de 69 anos, 249 (52%) eram homens, e 273 (57%), diabéticos. Predominaram os pacientes na Categoria 5 da Classificação de Rutherford (353/74%). Na análise multivariada, as mulheres tiveram chance 2,7 (IC: 1,75-4,26) vezes maior de doença do território femoropoplíteo. Os doentes tabagistas tiveram 3,6 (IC: 1,54-8,30) vezes maior risco de doença do território aortoilíaco. Diabéticos apresentaram 1,8 (IC: 1,04-3,19) vezes maior chance de obstrução apenas do território infragenicular. Conclusões O estudo mostrou que gênero, diabetes mellitus e tabagismo influenciam no padrão de distribuição da DAP em pacientes com ICCM. Os doentes diabéticos apresentaram maior chance de doença isolada do território infragenicular, as mulheres tiveram maior risco de DAP do território femoropoplíteo e os tabagistas possuem maior chance comprometimento aortoilíaco.

ABSTRACT Objectives: the purpose of this study was to evaluate the outcome of rectal cancer surgery, in a unit adopting the principles of total mesorectal excision (TME) with a high restorative procedure rate and with a low rate of abdominoperineal excision (APE). Methods: we enrolles patients with extraperitoneal rectal cancer undergoing TME or TME+APE. Patients with mid rectal tumors underwent TME, and patients with tumors of the lower rectum and no criteria for APE underwent TME and intersphincteric resection. Those in which the intersphincteric space was invaded and in those with a free distal margin less than 1cm or a tumor free radial margin were unattainable underwent APE or extralevator abdominoperineal excision (ELAPE). We assessed local recurrence rates, overall survival and involvement of the radial margin. Results: sixty (89.6%) patients underwent TME and seven (10.4%) TME + APE, of which five underwent ELAPE. The local recurrence, in pacientes undergoing TME+LAR, was 3.3% and in patients undergoing APE, 14.3%. The local recurrence rate (p=0.286) or the distant recurrence rate (p=1.000) was similar between groups. There was no involvement of radial margins. Survival after 120 months was similar (p=0.239). Conclusion: rectal malignancies, including those located in the low rectum, may be surgically treated with a low rate of APE without compromising oncological principles and with a low local recurrence rates.

RESUMO Objetivos: o objetivo deste estudo foi avaliar os resultados da cirurgia do câncer de reto, em uma unidade que adota os princípios da excisão total do mesorreto (ETM) com baixa taxa de amputação abdominoperineal (AAP). Métodos: os pacientes com câncer retal extraperitoneal foram submetidos a ETM ou ETM com amputação abdominoperianeal. Pacientes com tumores de reto médio foram submetidos a EMT e pacientes com tumores de reto inferior e sem critérios para AAP foram submetidos a EMT e ressecção interesfincteriana. Aqueles em que o espaço interesfincteriano foi invadido e naqueles com margem distal livre menor que 1cm ou margem radial livre de tumor foram inatingíveis foram submetidos a AAP ou excisão abdominoperineal extraelevadora (ELAPE). Avaliamos as taxas de recorrência local, sobrevida global e envolvimento da margem radial. Resultados: sessenta (89,6%) pacientes realizaram ETM e sete (10,4%) ETM + AAP, dos quais cinco realizaram ELAPE. A recidiva local, em pacientes submetidos a ETM com ressecção anterior baixa, foi de 3,3% e em pacientes submetidos a AAP, 14,3%. A taxa de recorrência local (p=0,286) ou a taxa de recorrência à distância (p=1,000) foi semelhante entre os grupos. Não houve envolvimento das margens radiais. A sobrevida após 120 meses foi semelhante (p=0,239). Conclusão: as neoplasias malignas retais, incluindo aquelas localizadas no reto baixo, podem ser tratadas cirurgicamente com baixo índice de AAP, sem comprometer os princípios oncológicos e com baixo índice de recorrência local.

ABSTRACT There is a need for greater knowledge about the medium- and long-term effects of prescribed fire management on soil in ecosystems prone to wildfires and more vulnerable to climate change. This study examined the short- and medium-term effects of prescribed fire on soil chemical properties and chemical fractions of soil organic matter (SOM) in two positions of the landscape in a high-elevation grassland environment. The ecosystem is located in the mountain peaks of southeastern Brazil associated with the Atlantic Forest biome. Prescribed fire was conducted in 2017 to reduce understory vegetation and thus prevent potential severe wildfires. Soil samples were collected at the layers of 0.00-0.10, 0.10-0.20, and 0.20-0.40 m, at eight composite sampling. The composite samples were collected on five different occasions: before the prescribed fire, and 10, 30, 90, and 240 days after the prescribed fire. Soil chemical properties, total organic carbon, labile C, and chemical fractionation of SOM were analyzed. All soil properties investigated were affected by the prescribed fire, with variations in landscape position, duration of effect, and soil layer. In the backslope area, the medium-term effect of fire was negative and induced soil degradation and induced soil degradation. In the footslope area, the system showed greater resilience to the effects of fire, as indicated by the recovery of the soil’s chemical properties. These results can help assess the suitability of controlled burning of vegetation for managing risks of fire in mountainous regions, such as high-elevation grasslands.

ABSTRACT Historically, all efforts against tuberculosis were focused on rapid diagnosis and effective treatment to break the chain of transmission of Mycobacterium tuberculosis. However, in the last few years, more and more evidence has been found on the dramatic consequences of the condition defined as post-tuberculosis lung disease (PTLD). Approximately one third of patients surviving pulmonary tuberculosis face considerable ongoing morbidities, including respiratory impairment, psychosocial challenges, and reduced health-related quality of life after treatment completion. Given the important global and local burden of tuberculosis, as well as the estimated burden of PTLD, the development of a consensus document by a Brazilian scientific society-Sociedade Brasileira de Pneumologia e Tisiologia (SBPT)-was considered urgent for the prevention and management of this condition in order to allocate resources to and within tuberculosis services appropriately and serve as a guide for health care professionals. A team of eleven pulmonologists and one methodologist was created by the SBPT to review the current evidence on PTLD and develop recommendations adapted to the Brazilian context. The expert panel selected the topics on the basis of current evidence and international guidelines. During the first phase, three panel members drafted the recommendations, which were divided into three sections: definition and prevalence of PTLD, assessment of PTLD, and management of PTLD. In the second phase, all panel members reviewed, discussed, and revised the recommendations until a consensus was reached. The document was formally approved by the SBPT in a special session organized during the 2023 SBPT Annual Conference.

RESUMO Historicamente, todos os esforços contra a tuberculose concentraram-se no diagnóstico rápido e no tratamento efetivo para quebrar a cadeia de transmissão do Mycobacterium tuberculosis. No entanto, nos últimos anos, têm sido encontradas mais e mais evidências sobre as dramáticas consequências da condição definida como doença pulmonar pós-tuberculose (DPPT). Aproximadamente um terço dos pacientes que sobrevivem à tuberculose pulmonar enfrenta morbidades consideráveis e persistentes, incluindo comprometimento respiratório, desafios psicossociais e redução da qualidade de vida relacionada à saúde após o término do tratamento. Diante da importante carga global e local da tuberculose, bem como da carga estimada da DPPT, considerou-se urgente o desenvolvimento de um documento de consenso por uma sociedade científica brasileira - a Sociedade Brasileira de Pneumologia e Tisiologia (SBPT) - para a prevenção e manejo dessa condição, a fim de alocar recursos de forma adequada para e nos serviços de tuberculose e servir de guia para os profissionais de saúde. Uma equipe de onze pneumologistas e um metodologista foi criada pela SBPT para revisar as evidências atuais sobre a DPPT e desenvolver recomendações adaptadas ao contexto brasileiro. O painel de especialistas selecionou os temas com base nas evidências atuais e diretrizes internacionais. Durante a primeira fase, três membros do painel redigiram as recomendações, que foram divididas em três seções: definição e prevalência de DPPT, avaliação da DPPT e manejo da DPPT. Na segunda fase, todos os membros do painel analisaram, discutiram e revisaram as recomendações até chegar a um consenso. O documento foi aprovado formalmente pela SBPT em sessão especial organizada durante o Congresso Anual da SBPT de 2023.

Abstract The Brazilian Society of Angiology and Vascular Surgery, through the Guidelines Project, presents new Abdominal Aortic Aneurysm Guidelines, on the subject of care for abdominal aortic aneurysm patients. Its development prioritized descriptive guidelines, using the EMBASE, LILACS, and PubMed databases. References include randomized controlled trials, systematic reviews, meta-analyses, and cohort studies. Quality of evidence was evaluated by a pair of coordinators, aided by the RoB 2 Cochrane tool and the Newcastle Ottawa Scale forms. The subjects include juxtarenal aneurysms, infected aneurysms, and new therapeutic techniques, especially endovascular procedures. The current version of the guidelines include important recommendations for the primary topics involving diagnosis, treatment, and follow-up for abdominal aortic aneurysm patients, providing an objective guide for medical practice, based on scientific evidence and widely available throughout Brazil.

Resumo A Sociedade Brasileira de Angiologia e Cirurgia Vascular, por meio do projeto Diretrizes, apresenta as novas Diretrizes de Aorta Abdominal, referentes aos cuidados de pacientes com aneurisma de aorta abdominal. Para sua elaboração, foram priorizadas diretrizes descritivas, utilizando as bases EMBASE, LILACS e PubMed. As referências incluem ensaios clínicos randomizados, revisões sistemáticas, metanálises e estudos de coorte. A qualidade das evidências foi examinada por uma dupla de coordenadores, com auxílio da ferramenta RoB 2 da Colaboração Cochrane e dos formulários da Newcastle Ottawa Scale. Aneurismas justarrenais, infectados e novas técnicas terapêuticas, principalmente no âmbito endovascular, estão entre os temas estudados. A versão atual das Diretrizes apresenta importantes recomendações para os principais itens que envolvem o diagnóstico, tratamento e acompanhamento de pacientes com aneurisma de aorta abdominal, oferecendo um guia objetivo para prática médica, construído a partir de evidências científicas e amplamente acessível em todo o território nacional.

BACKGROUND Leishmaniasis, a neglected disease caused by the parasite Leishmania, is treated with drugs associated with high toxicity and limited efficacy, in addition to constant reports of the emergence of resistant parasites. In this context, snake serums emerge as good candidates since they are natural sources with the potential to yield novel drugs. OBJECTIVES We aimed to show the antileishmanial effects of γCdcPLI, a phospholipase A2 inhibitor from Crotalus durissus collilineatus snake serum, against Leishmania (Leishmania) amazonensis. METHODS Promastigotes forms were exposed to γCdcPLI, and we assessed the parasite viability and cell cycle, as well as invasion and proliferation assays. FINDINGS Despite the low cytotoxicity effect on macrophages, our data indicate that γCdcPLI has a direct effect on parasites promoting an arrest in the G1 phase and reduction in the G2/M phase at the highest dose tested. Moreover, this PLA2 inhibitor reduced the parasite infectivity when promastigotes were pre-treated. Also, we demonstrated that the γCdcPLI treatment modulated the host cell environment impairing early and late steps of the parasitism. MAIN CONCLUSIONS γCdcPLI is an interesting tool for the discovery of new essential targets on the parasite, as well as an alternative compound to improve the effectiveness of the leishmaniasis treatment. Leishmaniasis efficacy context A serum (Leishmania amazonensis cycle assays macrophages G G2M GM G2 M tested Moreover PLA pretreated. pretreated pre treated. pre-treated Also parasitism

Resumo Objetivo Correlacionar alterações radiográficas e lesões de estruturas intra-articulares do acetábulo com a intensidade da dor e a incapacidade de pacientes com diagnóstico de síndrome do impacto femoroacetabular. Métodos Realiou-se uma análise retrospectiva de dados pré-operatórios de 182 pacientes (190 quadris). Foram avaliadas variáveis clínicas como idade, sexo e prática de atividade física, e variáveis radiográficas, como ângulo de Wiberg e o ângulo alfa. Por meio do vídeo intraoperatório, foi avaliada a extensão das lesões condrais e labiais considerando-se o método clock-face, o grau de comprometimento articular pela classificação de Outerbridge, e a presença de lesão em onda. As variáveis foram analisadas por meio de regressão linear, tendo como variáveis dependentes a intensidade da dor, avaliada pela Escala Visual Analógica (EVA), e a incapacidade funcional, mensurada pelo Harris Hip Score modificado (HHSm). Resultados A média de idade dos pacientes foi de 38,5 ± 9,6 anos, a da intensidade da dor, 7,8 ± 1,6, e a do HHSm, 56,3 ± 12,7. No total, 61% da amostra apresentava Outerbridge III ou IV, e 12,6% apresentava lesão em onda. Observou-se correlação do sexo masculino (r = 0,497) com menor intensidade da dor, e correlação da idade (r = −0,27), do sexo masculino (r = 8,419) e da realização de atividade física com maior escore funcional no HHSm (r = 4,729). Conclusão Não houve correlação dos parâmetros radiográficos e artroscópicos deste estudo com a intensidade da dor e a incapacidade dos pacientes. O sexo masculino está relacionado com menor intensidade da dor, e maior capacidade funcional está relacionada com o sexo masculino, menor idade, e a prática de atividade física. Nível de Evidência IV.

Abstract Objective To correlate radiographic alterations and lesions in intra-articular structures of the acetabulum with the intensity of pain and disability of patients diagnosed with femoroacetabular impingement syndrome. Methods A retrospective analysis of the preoperative data of 182 patients (190 hips) was performed. Clinical variables such as age, gender, the practice of physical activity, and radiographic variables, such as the Wiberg and alpha angles, were evaluated. Through an intraoperative video, the extent of the chondral and labial lesions was evaluated considering the clock-face method, the degree of joint involvement by the Outerbridge classification, and the presence of wave lesions. The variables were analyzed by linear regression, with the intensity of the pain assessed by the Visual Analog Scale (VAS), and functional disability measured by the Modified Harris Hip Score (mHHS). Results The mean age of the patients was of 38.5 ± 9.6 years, the mean intensity of the pain was of 7.8 ± 1.6, and the mean mHHS score was of 56.3 ± 12.7. In total, 61% of the sample were classified as Outerbridge III or IV, and 12.6% had wave lesions. There was a correlation between the male gender (r = 0.497) and lower intensity of the pain, and a correlation of age (r = -0.27), the male gender (r = 8.419) and physical activity with higher functional scores on the mHHS (r = 4.729). Conclusion There was no correlation of the radiographic and arthroscopic parameters of the present study and the intensity of pain and the disability of the patients. The male gender is related to lower intensity of pain, and higher functional ability is related to the male gender, lower age, and the practice of physical activity. Level of Evidence IV.

Resumo Objetivo Avaliar a precisão e as diferenças entre 2 tipos de marcadores metálicos, esfera e moeda, para calibração radiográfica no planejamento pré-operatório da artroplastia de quadril. Métodos Quatro marcadores metálicos esféricos e quatro moedas, ambas de 25 mm de diâmetro, foram colocadas em trocânter maior, sínfise púbica, entre as coxas e a mesa do exame, para exame radiográfico do quadril em 33 pacientes com prótese de quadril. A cabeça da prótese foi utilizada para calibração e dois examinadores mediram os diâmetros da imagem dos marcadores, e os resultados foram analisados estatisticamente. Resultados No trocânter maior, a esfera e a moeda não foram visualizadas em 19 radiografias (57,6%). Entre as coxas, o marcador de moeda não foi visualizado em 13 radiografias (39,4%). No trocânter maior, a precisão de 25 mm da moeda e da esfera foi, respectivamente, entre 57,1 e 63,3% e entre 64,3 e 92,9%. A moeda entre as coxas atingiu 25 mm de precisão entre 50 e 60%. Sobre a mesa de exame, os marcadores de moeda e esfera atingiram, respectivamente, diâmetros médios de 22,91 mm e 23 mm, o menor coeficiente de variação, o menor intervalo de confiança e o posicionamento mais fácil. Houve diferença estatística entre as avaliações dos marcadores (moeda vs. esfera) em todas as posições (p< 0,032), com exceção da posição na mesa de exame (p= 0,083). Conclusões A moeda entre as coxas é o melhor marcador para calibração radiográfica no planejamento pré-operatório da artroplastia de quadril, e sugerimos o uso de outra moeda na mesa de exame para comparação, considerando os 8% de redução em relação ao seu tamanho real.

Abstract Objective To evaluate the accuracy and differences between 2 types of metallic markers, sphere, and coin, for radiographic calibration in the preoperative planning of hip arthroplasty. Methods Four spherical metallic markers and four coins, both 25 mm in diameter, were placed on the greater trochanter, pubic symphysis, between the thighs, and on the table of the exam, for radiographic examination of the hip in 33 patients with hip prosthesis. The prosthesis head was used for calibration and two examiners measured the markers' image diameters, and the results were analyzed statistically. Results In the greater trochanter, the sphere and the coin were not visualized in 19 radiographs (57.6%). Between the thighs, the coin marker was not visualized in 13 radiographs (39.4%). In the greater trochanter, the 25-mm accuracy of the coin and the sphere was, respectively, between 57.1 and 63.3% and between 64.3 and 92.9%. The coin between the thighs reached 25-mm accuracy in between 50 and 60% of cases. Over the exam table, the coin and sphere markers reached, respectively, the mean diameters of 22.91 mm and 23 mm, the lowest coefficient of variation, the lowest confidence interval, and the easiest positioning. There was statistical difference between the evaluations of the markers (coin vs. sphere) in all positions (p< 0.032), except for the exam table position (p= 0.083). Conclusions The coin between the thighs is the best marker for radiographic calibration in the preoperative planning of hip arthroplasty, and we suggest the use of another coin on the exam table for comparison, considering the 8% reduction in relation to its real size.