Utilização da cannabis sativa para tratamento de dor crônica em cães / Use of cannabis sativa for the treatment of chronic pain in dogs / Uso de cannabis sativa para el tratamiento del dolor crónico en perros

A Cannabis sativa é uma planta que apresenta vários benefícios terapêuticos para animais, como tratamento da dor neuropática, inflamatória e osteoartrose. A dor é bastante recorrente na rotina clínica, sendo importante seu manejo para que seja ofertada uma melhor qualidade e conforto de vida para o paciente. O estudo objetivou identificar, a partir de evidências científicas, as características da utilização medicinal do uso de Cannabis Sativa no tratamento da dor crônica no cão, utilizando um dos seus princípios ativos, canabidiol (CBD). Foi feito uma revisão bibliográfica onde foi realizada a busca de estudos experimentais e relatos de caso em bases de dados eletrônicos, sendo incluídas fontes contendo a utilização do CBD em animais, que abordaram controle da dor, assim como escore avaliativo da dor antes, durante e após o tratamento proposto. Após eleger e analisar 54 estudos percebe-se que na medicina veterinária o uso do canabidio é insuficiente, uma vez que o foco da maior parte dos estudos clínicos é voltado para medicina humana. Ainda assim, a utilização de CBD mostrou-se eficaz, confirmando uma nova alternativa para o controle da dor em animais.(AU)

Cannabis sativa is a plant that has several therapeutic benefits for animals, such as the treatment of neuropathic and inflammatory pain and osteoarthritis. Pain is quite recurrent in the clinical routine, and its management is important to offer a better quality and comfort of life for the patient. The study aimed to identify, based on scientific evidence, the characteristics of the medicinal use of Cannabis Sativa in the treatment of chronic pain in dogs, using one of its active principles, cannabidiol (CBD). A bibliographical review was carried out in which experimental studies and case reports were searched in electronic databases, including sources containing the use of CBD in animals, which addressed pain control, as well as pain assessment score before, during and after the proposed treatment. After choosing and analyzing 54 studies, it is clear that in veterinary medicine the use of CBD is few, and the focus of clinical studies is on human medicine. The use of CBD proved to be effective, thus confirming a new alternative for pain control in animals.(AU)

El cannabis sativa es una planta que tiene varios beneficios terapéuticos para los animales, como el tratamiento del dolor neuropático e inflamatorio y la osteoartritis. El dolor es bastante recurrente en la rutina clínica, y su manejo es importante para ofrecer una mejor calidad y comodidad de vida al paciente. El estudio tuvo como objetivo identificar, con base en la evidencia científica, las características del uso medicinal de Cannabis Sativa en el tratamiento del dolor crónico en perros, utilizando uno de sus principios activos, el cannabidiol (CBD). Se realizó una revisión bibliográfica en la que se buscaron estudios experimentales y reportes de casos en bases de datos electrónicas, incluyendo fuentes que contengan el uso de CBD en animales, que abordaran el control del dolor, así como la puntuación de evaluación del dolor antes, durante y después del tratamiento propuesto. Después de elegir y analizar 54 estudios, queda claro que en medicina veterinaria el uso de cannabidio es insuficiente, ya que el foco de la mayoría de los estudios clínicos está en la medicina humana. Aun así, el uso de CBD demostró ser efectivo, confirmando una nueva alternativa para el control del dolor en animales.(AU)

Uso de artroplastia reversa de hombro más aloinjerto estructural en paciente con defecto glenoideo anteroinferior: reporte de caso y revisión de la literatura / Use of reverse shoulder arthroplasty plus structural allograft in a patient with an anterior inferior glenoid defect: case report and review of the literature

Los defectos glenoideos en una prótesis primaria o de revisión son un reto para el cirujano ortopedista; la toma adecuada de decisiones y la planificación preoperatoria son dos herramientas fundamentales para que el acto quirúrgico presente los mejores resultados. Existen diversos métodos de imágenes para determinar el tipo de defecto que la glena pueda presentar, ya sea aumento de la retroversión o, peor aún, una glena anteversa acompañada de una subluxación o luxación como tal. Se presenta a continuación un caso de un paciente masculino, de cuarenta y siete años, con artrosis glenohumeral Hamada tipo IV, lesión de manguito rotador Patte tipo 3, con marcada limitación funcional y hallazgos imagenológicos de alteración de su estructura ósea a nivel de glena y cabeza humeral, con dos años de evolución. Se propone como tratamiento una prótesis reversa de hombro con uso de aloinjerto estructural de pilón tibial. Se expone el caso con seguimiento a seis meses de rangos de movilidad y escala de dolor

Glenoid defects in a primary or revision prosthesis are a challenge for an orthopedic surgeon. Appropriate decision-making and preoperative planning are two fundamental tools for the surgical act to present the best results. There are various imaging methods to determine the type of defect that the glenoid may present, whether it is increased retroversion or, worse still, an anteverted glenoid accompanied by a subluxation or dislocation as such.The following is a case of a 47-year-old male patient with Hamada type IV glenohumeral osteoarthritis, Patte type 3 rotator cuff injury, with marked functional limitation and imaging achievements of alterations in his bone structure at the level of the glenoid and humeral head, with two years of evolution. A reverse shoulder prosthesis with the use of a structural allograft of the distal tibia is proposed as treatment, and the case is presented with a 6-month follow-up of ranges of motion and pain scale

Evaluación funcional de pacientes con osteoartritis que asistieron al Centro de Rehabilitación Integral Especializado Guayaquil / Functional evaluation of patients with osteoarthritis who attended the Guayaquil Specialized Comprehensive Rehabilitation Center / Avaliação funcional de pacientes com osteoartrite atendidos no Centro Especializado de Reabilitação Integral de Guayaquil

La osteoartritis pertenece al grupo de afecciones articulares degenerativa más común y una de las principales causas de discapacidad en el mundo, caracterizada por provocar dolor articular, rigidez, y pérdida de la capacidad funcional. Objetivo. Evaluar la funcionalidad de los pacientes con osteoartritis que asistieron al Centro de Rehabilitación Integral Especializado Guayaquil # 2. Materiales y Métodos. Se realizó un estudio bajo un enfoque cuantitativo, con un alcance descriptivo y de corte transversal, se desarrolló mediante la medición numérica y análisis de datos de las variables en estudio como edad; sexo; patología; ocupación laboral; rigidez y capacidad funcional, mediante opciones de respuestas. La recolección de datos se ejecutó por medio de la técnica de la observación, para el análisis de los resultados obtenidos del Cuestionario Western Ontario and McMasters Universities Osteoarthritis Índex. Resultados. Se determinó que de acuerdo al sexo prevaleció el femenino en un 90%, la mayoría entre 60 y 70 años de edad; el 70% del grupo estudiado fueron las amas de casa; patología frecuente la poliosteoartritis en un 85%; presentaron un 55% muchísimo dolor y el 45% mucho dolor; la rigidez en un 45%; mientras un 10% no disminución de la capacidad funcional en las articulaciones afectadas. Conclusiones. La osteoartritis afectó la condición funcional a la mayoría de las mujeres y se evidenció con el análisis de la evaluación del resultado obtenido, mediante el Cuestionario Womac.

Osteoarthritis belongs to the most common group of degenerative joint conditions and is one of the leading causes of disability in the world, characterized by joint pain, stiffness, and loss of functional capacity. Objective. To evaluate the functionality of patients with osteoarthritis who attended the Centro de Rehabilitación Integral Especializado Guayaquil # 2. Materials and Methods. A study was carried out under a quantitative approach, with a descriptive and cross-sectional scope, developed through numerical measurement and data analysis of the variables under study such as age; sex; pathology; work occupation; stiffness and functional capacity, by means of response options. Data collection was carried out by means of the observation technique, for the analysis of the results obtained from the Western Ontario and McMasters Universities Osteoarthritis Index Questionnaire. Results. It was determined that according to sex, 90% were female, most of them between 60 and 70 years of age; 70% of the group studied were housewives; 85% had polyosteoarthritis; 55% had a lot of pain and 45% a lot of pain; 45% had stiffness; while 10% had no decrease in the functional capacity of the affected joints. Conclusions. Osteoarthritis affected the functional condition of most of the women and this was evidenced by the analysis of the evaluation of the result obtained by means of the Womac Questionnaire.

A osteoartrite pertence ao grupo mais comum de condições articulares degenerativas e é uma das principais causas de incapacidade no mundo, caracterizada pela dor articular, rigidez e perda da capacidade funcional. Objetivo. Avaliar a funcionalidade dos pacientes com osteoartrite que atendem ao Centro de Reabilitação Integral Especializado Guayaquil # 2. Materiais e métodos. Foi realizado um estudo sob uma abordagem quantitativa, com um escopo descritivo e transversal, desenvolvido por meio de medição numérica e análise de dados das variáveis em estudo, tais como idade; sexo; patologia; ocupação do trabalho; rigidez e capacidade funcional, por meio de opções de resposta. A coleta de dados foi realizada por meio da técnica de observação, para a análise dos resultados obtidos das Universidades Western Ontario e McMasters Questionário do Índice de Osteoartrite. Resultados. Foi determinado que, segundo o sexo, 90% eram do sexo feminino, a maioria entre 60 e 70 anos de idade; 70% do grupo estudado eram donas de casa; 85% tinham polioseartrose; 55% tinham muita dor e 45% muita dor; 45% tinham rigidez; enquanto 10% não tinham diminuição da capacidade funcional das articulações afetadas. Conclusões. A osteoartrose afetou a condição funcional da maioria das mulheres e foi evidenciada pela análise da avaliação do resultado obtido por meio do Questionário Womac.

Cementless Total Hip Arthroplasty in Patients with Osteoarthrosis Secondary to Legg-Calvé-Perthes Disease Compared with Primary Osteoarthrosis: A Case-control Study / Artroplastia total do quadril não cimentada em pacientes com osteoartrose secundária à doença de Legg-Calvé-Perthes em comparação com a osteoartrose primária: Um estudo caso-controle

Abstract Objective To perform a comparative clinical, functional and radiographic evaluation of total hip arthroplasty (THA) performed with a cementless prosthesis in cases of osteoarthrosis secondary to Legg-Calvé-Perthes Disease (LCPD) and in cases of primary osteoarthrosis. Methods In the present case-control study, we reviewed medical records of patients admitted to a university hospital between 2008 and 2015 to undergo THA due to LCPD sequelae and compared them with a control group of patients who underwent the same surgery due to primary hip osteoarthrosis. We recruited patients for clinical, functional, and radiographic analysis and we compared the evaluations in the immediate postoperative period and at the last follow-up visit, considering surgical time, size of prosthetic components, and complications. Results We compared 22 patients in the study group (25 hips) with 22 patients (25 hips) in the control group, all of whom had undergone THA with the same cementless prosthesis. There was greater functional impairment in the group of patients with LCPD sequelae (p= 0.002). There were 4 intraoperative femoral periprosthetic fractures in the LCPD group and none in the primary osteoarthrosis group (p= 0.050). Conclusions There is an increased risk of intraoperative periprosthetic femoral fracture and worse clinical-functional results in patients undergoing cementless THA due to osteoarthrosis secondary to LCPD sequelae than in those who have undergone the same surgery due to primary hip osteoarthrosis.

Resumo Objetivo Realizar uma avaliação clínica, funcional e radiográfica comparativa da artroplastia total do quadril (ATQ) realizada com prótese não cimentada em casos de osteoartrose secundária à doença de Legg-Calvé-Perthes (DLCP) e em casos de osteoartrose primária. Métodos No presente estudo caso-controle, foram revisados os prontuários dos pacientes internados em um hospital universitário entre os anos de 2008 e 2015. Os pacientes foram submetidos a ATQ devido a sequelas da DLCP, sendo comparados com um grupo controle de pacientes submetidos à mesma cirurgia por osteoartrose primária do quadril. Os pacientes foram recrutados para a realização de uma análise clínica, funcional e radiográfica, na qual foram comparadas as avaliações no pós-operatório imediato e na última consulta de acompanhamento, levando em consideração o tempo cirúrgico, o tamanho dos componentes protéticos e as complicações. Resultados Comparamos 22 pacientes do grupo de estudo (25 quadris) com 22 pacientes (25 quadris) do grupo controle, todos os quais foram submetidos a ATQ com a mesma prótese não cimentada. Houve um maior comprometimento funcional no grupo de pacientes com sequelas da DLCP (p= 0,002). Ocorreram 4 fraturas periprotéticas femorais no intraoperatório do grupo DLCP, sendo que não ocorreu nenhuma no grupo de osteoartrose primária (p= 0,050). Conclusões Existe um risco elevado de fratura periprotética femoral no intraoperatório com resultados clínico-funcionais mais desfavoráveis aos pacientes que foram submetidos à ATQ não cimentada devido a osteoartrose secundária às sequelas da DLCP do que naqueles que foram submetidos à mesma cirurgia por osteoartrose primária de quadril.

Analysis of micro-costing through the Time-Driven Activity-Based Costing (TDABC) method in viscosupplementation procedures in different application regimens / Análise do microcusteio por meio de método Time-Driven Activity-Based Costing (TDABC) nos procedimentos de viscossuplementação do joelho em diferentes regimes de aplicação

Objective: To evaluate the micro-costing of viscosupplementation procedures compared to different infiltration regimens. Methods: This study compared, through the Time-Driven ActivityBased Costing method, the micro-costing of these different application regimens using national cost averages as a basis for calculation in a medium-sized outpatient service. Results: The results demonstrated that the difference in costs with the single application is 31.47% less for three and 119.13% for five applications. Conclusions: No study showed a superiority of the five-application regimen over the three-application regimen, which leads one to believe that there is no justification for this procedure from an economic or quality-of-life point of view.

Objective: Avaliar o microcusteio dos procedimentos de viscossuplementação do joelho em diferentes regimes de aplicação. Métodos: Este estudo comparou, por meio do método Time-Driven Activity-Based Costing, o microcusteio desses diferentes regimes de aplicação, usando com base de cálculo médias nacionais de custo em um serviço ambulatorial de porte médio. Resultados: Os resultados encontrados demonstraram que a diferença nos custos com a aplicação única é 31,47% menor para três aplicações e 119,13% para cinco aplicações. Conclusão: Em nenhum estudo houve superioridade do regime de cinco aplicações ao regime de três, fato que leva a acreditar que não há nenhuma justificativa para esse procedimento do ponto de vista econômico ou de qualidade de vida do paciente.

Navigation in Shoulder Arthroplasty Surgery / Navegação em cirurgia de artroplastia de ombro

Abstract The indication of shoulder arthroplasties has increased progressively. Accurate positioning of the components may have significant implications for clinical results. The navigation used to aid in the performance of anatomical and reverse total arthroplasties has provided greater precision in implant placement, especially on the glenoid. The development of the technique, material, and prosthesis design have shown encouraging results and led to a trend toward its expansion. In this way, we estimate a higher survival of the arthroplasties resulting from lower rates of dislocation and early loosening. We aim to describe the current technique and to present the results of the literature with navigation. However, comparative clinical studies with long term follow-up are necessary to prove the efficacy in the final results of total shoulder arthroplasties.

Resumo A indicação de artroplastias do ombro aumentou progressivamente. O posicionamento preciso dos componentes pode ter implicações significativas para os resultados clínicos. A navegação utilizada para auxiliar no desempenho de artroplastias totais anatômicas e reversas tem proporcionado maior precisão na colocação do implante, especialmente do componente glenoidal. O desenvolvimento da técnica, do material e do desenho da prótese têm mostrado resultados encorajadores e levado a uma tendência de expansão da sua utilização. Dessa forma, estimamos uma maior sobrevida das artroplastias resultantes de menores taxas de instabilidade e soltura precoce. Nosso objetivo é descrever a técnica atual e apresentar os resultados da literatura com navegação. No entanto, estudos clínicos comparativos com acompanhamento de longo prazo são necessários para comprovar a eficácia nos resultados finais das artroplastias totais do ombro.

Intra-articular Infiltration of Platelet-Rich Plasma versus Hyaluronic Acid in Patients with Primary Knee Osteoarthritis: Preliminary Results from a Randomized Clinical Trial / Infiltração intraarticular de plasma rico em plaquetas versus ácido hialurônico em pacientes com osteoartrose primária do joelho: Ensaio clínico randomizado com resultados preliminares

Abstract Objective The present study aimed to compare the effects of intraarticular infiltration of platelet-rich plasma with those of hyaluronic acid infiltration in the treatment of patients with primary knee osteoarthritis. Methods A randomized clinical trial was conducted with 29 patients who received an intraarticular infiltration with hyaluronic acid (control group) or platelet-rich plasma. Clinical outcomes were assessed using the visual analog scale for pain and the Western Ontario and McMaster Universities Arthritis Index (WOMAC) questionnaire before and after the intervention. In addition, the posttreatment adverse effects were recorded. Categorical variables were analyzed using the chi-square and Fisher exact tests, whereas continuous variables were analyzed using the Student t test, analysis of variance, and the Wilcoxon test; all calculations were performed with the Stats package of the R software. Results An independent analysis of each group revealed a statistical difference within the first months, with improvement in the pain and function scores, but worsening on the 6th month after the procedure. There was no difference in the outcomes between the groups receiving hyaluronic acid or platelet-rich plasma. There was no serious adverse effect or allergic reaction during the entire follow-up period. Conclusion Intraarticular infiltration with hyaluronic acid or platelet-rich plasma in patients with primary knee gonarthrosis resulted in temporary improvement of functional symptoms and pain. There was no difference between interventions.

Resumo Objetivo Comparar o efeito da infiltração intraarticular do plasma rico em plaqueta com a do ácido hialurônico no tratamento de pacientes com osteoartrose primária de joelho. Métodos Realizou-se um ensaio clínico randomizado com 29 pacientes, sendo um grupo submetido à infiltração com ácido hialurônico (controle) e o outro com plasma rico em plaquetas. Os desfechos clínicos avaliados foram a escala visual analógica da dor; o questionário Western Ontario and McMaster Universities Arthritis Index (WOMAC), antes e depois da intervenção; e os efeitos adversos após as aplicações. Utilizou-se os testes do qui-quadrado e exato de Fisher para as variáveis categóricas, e o teste t de Student, análise de variância, e Wilcoxon para as variáveis contínuas, através do software R. Resultados A análise independente de cada grupo revelou uma diferença estatística nos meses iniciais, com melhora dos escores de dor e função; porém, com piora no 6° mês após o procedimento. Não houve diferença dos desfechos avaliados entre os grupos que foram submetidos à infiltração com ácido hialurônico ou com plasma rico em plaquetas. Não houve efeito adverso grave ou reação alérgica durante todo o seguimento. Conclusão A infiltração intraarticular com ácido hialurônico ou plasma rico em plaquetas nos joelhos dos pacientes com gonartrose primária apresentou melhora temporária dos sintomas de função e dor. Não houve diferença entre as duas intervenções.

Use of the Triquetrum-Hamate Portal in FourCorner Wrist Fusion: A Useful Technical Trick / Uso do portal piramidal-hamato na fusão de punho de quatro cantos: Um bom truque técnico

Abstract Arthroscopy-assisted partial wrist-fusion techniques are becoming more popular nowadays. It became clearer that avoiding the violation of important ligament and tendinous structures - which is impossible when using the classic open techniques - enables a more biological approach, which is essential for faster healing and improvement in function. We describe the use of the triquetrum-hamate (TH) portal, which is seldomly applied in routine arthroscopic techniques for hand and wrist surgery, as an accessory portal to better perform anterior midcarpal debridement in four-corner fusion. This trick enables an almost complete anterior resection of the capitate and hamate chondral surfaces, increasing the subchondral osseous contact in the midcarpal joint after fixation, thus leading to higher consolidation rates.

Resumo As técnicas de fusão parcial do punho assistidas por artroscopia estão se tornando mais populares. Ficou claro que evitar a violação de importantes estruturas ligamentares e tendíneas, o que é imposssível com as técnicas abertas clássicas, permite uma abordagem mais biológica, essencial para a cicatrização mais rápida e melhora da função. Descrevemos o uso do portal piramidal-hamato (PH), raramente aplicado em técnicas artroscópicas de rotina para cirurgia de mão e punho, como portal acessório para melhor execução do desbridamento carpal medial anterior na fusão de quatro cantos. Esse truque possibilita a ressecção anterior quase completa das superfícies condrais do capitato e do hamato, o que aumenta o contato ósseo subcondral na articulação mesocárpica após a fixação e eleva as taxas de consolidação.

Costovertebral Osteoarthrosis: Rare Differential Diagnosis of Back pain in young patients. Case Report / Osteoartrose costovertebral: Diagnóstico diferencial raro de dorsalgia no paciente jovem. Relato de caso

Abstract The differential diagnosis of dorsal thoracic pain can be a challange due to the proximity of the dorsal column to vital organs as well as to its unique anatomy, innervation, and rib joint. The patterns of referred visceral pain require, in most cases, extensive complementary diagnostic tests in order to exclude severe conditions. Referred pain patterns often result in numerous and expensive visceral workups in order to exclude serious conditions, and costovertebral joint osteoarthritis is usually only considered when the origin of the pain remains unexplained. The authors present the case of a 40-year-old man with disabling dorsal pain due to isolated costovertebral osteoarthrosis. The symptomatology was controlled after injection of methylprednisolone guided by computed tomography. This clinical case aims to describe the clinical presentation of a rare entity that should be considered in the differential diagnosis of back pain.

Resumo O diagnóstico diferencial de dorsalgia revela-se um desafio pela proximidade da coluna dorsal a órgãos vitais assim como por sua anatomia única, inervação e articulação com as costelas. Os padrões de dor referida visceral obrigam, na maioria das vezes, a extensivos exames complementares de diagnóstico de forma a excluir condições graves. A osteoartrose da articulação costovertebral é um diagnóstico pouco reconhecido, e habitualmente é somente considerado quando a fonte de dor continua sem explicação após extensa investigação. Os autores apresentam o caso de um homem de 40 anos de idade com dor dorsal incapacitante devido a osteoartrose costovertebral isolada. A sintomatologia foi controlada após a injeção de metilprednisolona guiada por tomografia computadorizada. Este caso clínico tem como objetivo descrever a apresentação clínica de uma entidade rara que deverá ser considerada no diagnóstico diferencial de dorsalgia.

BMP-4, TGF-β and Smad3 as Modulators of Synovial Fluid Cells Viability / BMP-4, TGF-β e Smad3 como moduladores da viabilidade das células do líquido sinovial

Abstract Objective Our goal was to evaluate the modulation of the synovial fluid cells (SFC) from patients with and without osteoarthritis (OA) by bone morphogenetic protein 4 (BMP-4), Smad-3 and transforming growth factor beta (TGF-β). Methods Synovial fluid was collected from patients submitted to knee arthroscopy or replacement and were centrifuged to isolate cells from the fluid. Cells were cultured for 21 days and characterized as mesenchymal stem cells (MSCs) according to the criteria of the International Society of Cell Therapy. Then, we performed an [3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide] assay (MTT) assay after exposing cells with and without OA to TGF-β, Smad3 and BMP-4 pathway inhibitors and to different concentrations of BMP4. Results Exposure to the TGF-β, Smad3 and BMP-4 inhibitors modifies the mitochondrial activity of the SFCs. The activity of the SFCs is modified by influences of increasing concentrations of BMP4, but there is no difference in cellular activity between patients with and without OA. Conclusion TGF-β, Smad3 and BMP-4 modulate the activity of SFCs from patients with and without knee OA.

Resumo Objetivo Nosso objetivo foi avaliar a modulação das células do líquido sinovial (SFCs, na sigla em inglês) de pacientes com e sem osteoartrite (OA) por proteína morfogenética óssea 4 (BMP-4), Smad3 e transformador do fator de crescimento β (TGF-β). Métodos O do líquido sinovial foi coletado de pacientes submetidos a artroscopia ou artroplastia do joelho, e centrifugados para isolar as células do liquido sinovial. As células foram cultivadas por 21 dias e caracterizadas como células-tronco mesenquimais (MSCs, na sigla em inglês) de acordo com os critérios da International Society of Cell Therapy. Em seguida, realizamos um ensaio de brometo de 3-4,5-dimetil-tiazol-2-il-2,5difeniltetrazólio (MTT) depois de expor células com e sem OA para TGF-β, inibidores de via Smad3 e BMP-4 e para diferentes concentrações de BMP-4. Resultados A exposição aos inibidores TGF-β, Smad3 e BMP-4 modifica a atividade mitocondrial das SFCs. A atividade das SFCs é modificada por influências sobre o aumento das concentrações de BMP-4, mas não há diferença na atividade celular entre pacientes com e sem OA. Conclusão TGF-β, Smad3 e BMP-4 modulam a atividade das SFCs de pacientes com e sem OA do joelho.

Metformin and resveratrol suppress type 2 diabetes mellitus-induced articular cartilage damage in rats associated with the inhibition of inflammation and augmentation of proteoglycans / La metformina y el resveratrol suprimen el daño del cartílago articular inducido por la diabetes mellitus tipo 2 en ratas asociado con la inhibición de la inflamación y el aumento de proteoglicanos

SUMMARY: Induction of osteoarthritis (OA) following diabetes is characterized by a sever inflammation of the joints that can lead to disability. The cartilage content of proteoglycans can substantially be reduced, following the induction of diabetes mellitus associated with inflammation as well as knee joint injury, and the antidiabetic drug metformin combined with the anti-inflammatory agent resveratrol can prevent these deleterious effects. Therefore, insulin-independent diabetes, type 2 diabetes mellitus (T2DM) was induced in Albino rats by streptozotocin (STZ) injection (50 mg/kg) after being fed on a high carbohydrate and fat diets for 2 weeks. The protective group of rats which also received a single injection of STZ was treated daily with metformin (Met; 200 mg/kg) and resveratrol (Res; 30 mg/kg) for 12 weeks. Harvested knee joint tissues were prepared for basic histology stain and for proteoglycans staining using light microscopy. Histology images showed in diabetic rats (T2DM) OA development as demonstrated by profound injury to the knee joint and severe decrease of articular cartilage proteoglycans content, which were substantialy protected by Met+Res. Met+Res also significantly (p< 0.0001) decreased diabetes induced glycemia, dyslipidemia, and the inflammatory biomarkers, tumor necrosis factor-alpha (TNF-α), interleukin-6 (IL-6), and high sensitivity C-reactive protein (hs-CRP). In addition, there was a significant correlation between OA and glycemia, dyslipidemia, and inflammation. Collectively, we demonstrate an association between knee joint damage and biomarkers of glycemia, dyslipidemia, and inflammation in diabetes-induced OA, with metformin plus resveratrol providing protective effects.

RESUMEN: La inducción de osteoartritis (OA) después de la diabetes se caracteriza por una inflamación severa de las articulaciones que puede conducir a la discapacidad. El contenido de cartílago de proteoglicanos se puede reducir sustancialmente, luego de la inducción de diabetes mellitus asociada con inflamación y lesión en la articulación de la rodilla sin embargo, el fármaco antidiabético metformina combinado con el agente antiinflamatorio resveratrol puede prevenir estos efectos nocivos. Por lo tanto, se indujo diabetes insulino dependiente, diabetes mellitus tipo 2 (T2DM) en ratas albinas mediante inyección de estreptozotocina (STZ) (50 mg/kg) después de haber sido alimentadas con dietas ricas en carbohidratos y grasas durante 2 semanas. El grupo protector de ratas que también recibió una inyección única de STZ fue tratado diariamente con metformina (Met; 200 mg/kg) y resveratrol (Res; 30 mg/kg) durante 12 semanas. Tejidos de la articulación de la rodilla fueon retirados y teñidos con histología básica y tinción de proteoglicanos usando microscopía óptica. Las imágenes histológicas en ratas diabéticas mostraban (T2DM) desarrollo de OA visualizadas por una lesión profunda en la articulación de la rodilla y una disminución severa del contenido de proteoglicanos del cartílago articular, los cuales estaban sustancialmente protegidos por Met+Res. Met+Res. También disminuyó significativamente (p< 0,0001) la glucemia inducida por la diabetes, la dislipidemia y los biomarcadores inflamatorios, el factor de necrosis tumoral alfa (TNF-α), la interleucina-6 (IL-6) y la proteína C reactiva de alta sensibilidad (PCR-hs). Además, hubo una correlación significativa entre la OA y la glucemia, la dislipidemia y la inflamación. En conjunto, demostramos una asociación entre el daño de la articulación de la rodilla y los biomarcadores de glucemia, dislipidemia e inflamación en la OA inducida por diabetes, con metformina más resveratrol que brindan efectos protectores.

Long Term Outcomes of Computer-Navigated Lateral Opening Wedge Distal Femoral Osteotomy for Lateral Compartment Knee Arthrosis / Resultados a longo prazo de osteotomia varizante femoral distal (OVFD) com cunha de abertura lateral para artrose do compartimento lateral do joelho utilizando navegação computadorizada

Abstract Objective The primary aim of the present study was to evaluate the long-term outcomes including survivorship of computer navigated distal femoral lateral opening wedge osteotomy (DFLOWO). The secondary aim was to identify the potential factors that may influence its survivorship. Methods A retrospective analysis of prospectively collected data for patients with lateral compartment arthritis who underwent navigated DFLOWO from December 2006 to November 2012 was performed. The International Knee Documentation Committee (IKDC) and Knee Injury and Osteoarthritis Outcome Score (KOOS) scores were analyzed for outcome measures. Conversion to arthroplasty during the follow-up was the end point. Results A total of 19 DFLOWOs were performed in 17 patients with a mean age of 46.6 ± 6.5 years formed the study cohort. The coronal alignment was corrected from a mean of 7.1° (2-11°) valgus to a mean of 2.1° (0.5°-3°) varus. The IKDC scores improved from mean of 39 preoperatively to 53 at the mean long-term follow-up of 9.1 years. The mean KOOS scores at the long-term follow-up were pain 71, symptoms 56, activities of daily living 82, sports and recreation 59, quality of life 43. Survivorship of the DFLOWO was 78.9% at a follow-up of 9.1 years. Presence of ≥ grade 2 according to the International Cartilage Repair Society (ICRS) cartilage degeneration in the medial compartment of the knee and >7° preoperative valgus deformity were strongly correlated with conversion to total knee arthroplasty (TKA) at the long-term follow-up (r= 0.66). ConclusionsComputer navigated DFLOWO has satisfactory clinical outcomes and 79% survivorship in long-term follow-up. Presence of more than ICRS ≥ grade 2 degenerative changes in the medial compartment of knee with > 7° preoperative valgus deformity negatively affects the survivorship of DFLOWO in the long-term follow-up.

Resumo Objetivo O objetivo principal do presente estudo foi avaliar os resultados a longo prazo, incluindo a sobrevivência em Osteotomia Varizante Femoral Distal com Cunha de Abertura Lateral (OVFD-CAL) utilizando navegação computadorizada. O objetivo principal do presente estudo foi avaliar os resultados a longo prazo, incluindo a sobrevivência. Métodos Foi realizada uma análise retrospectiva dos dados coletados prospectivamente de pacientes com artrite do compartimento lateral submetidos a OVFD-CAL por navegação de dezembro de 2006 a novembro de 2012. As pontuações International Knee Documentation Committee (IKDC, na sigla em inglês) e Knee Injury and Osteoarthritis Outcome Score (KOOS, na sigla em inglês) foram analisadas para medição de resultados. Conversão para artroplastia durante o acompanhamento foi o ponto final. Resultados Um total de 19 OVFD-CAL foram realizados em 17 pacientes com média de idade de 46,6 ± 6,5 anos formaram a coorte do estudo. O alinhamento coronal foi corrigido a partir de uma média de 7,1° (2-11°) de valgo para uma média de 2,1° (0,5°-3°) de varo. As pontuações do IKDC melhoraram de uma média pré-operatória de 39 para 53 no acompanhamento de médio de longo prazo de 9,1 anos. Os escores do KOOS no acompanhamento a longo prazo foram: dor 71, sintomas 56, atividades da vida diária 82, esportes e recreação 59, qualidade de vida 43. A sobrevivência do OVFD-CAL foi de 78,9% em um acompanhamento de 9,1 anos. Presença de degeneração da cartilagem segundo a Sociedade Internacional de Reparação de Cartilagem (International Cartilage Repair Society [ICRS, na sigla em inglês])≥ grau 2 no compartimento medial do joelho e deformidade pré-operatória em valgo > 7° fortemente correlacionado com a conversão para artroplastia total do joelho (ATJ) no acompanhamento a longo prazo (r - 0,66). ConclusõesA OVFD-CAL por navegação computadorizada apresentou resultados clínicos satisfatórios e sobrevida de 79% no acompanhamento a longo prazo. Presença de alterações degenerativas ICRS ≥ grau 2 no compartimento medial do joelho com > 7° de deformidade pré-operatória em valgo afeta negativamente a sobrevivência da OVFD-CAL no acompanhamento de longo prazo.

Terapia a laser de alta intensidade (Class IV) e fonoforese em gel de ibuprofeno para o tratamento de osteoartrite de joelho entre pessoas que vivem em terreno montanhoso: um protocolo de ensaio multicêntrico, duplo-cego randomizado / High-intensity laser therapy (Class IV) and ibuprofen gel phonophoresis for treating knee osteoarthritis among people living in hilly terrain: A randomized, double blind, multi-centre trial protocol

INTRODUÇÃO: Pessoas que vivem em terrenos íngremes com carga cíclica anormal podem levar à degeneração da cartilagem óssea. A terapia a laser de alta intensidade (TLAI) e a fonoforese trazem inúmeros benefícios aos pacientes com osteoartrite de joelho (OAJ). No entanto, ainda não está claro qual tratamento é eficaz entre eles na reabilitação de pacientes com OAJ. OBJETIVO: Verificar se a TLAI de 8 semanas não é pior que a fonoforese em gel de ibuprofeno (FGI) no tratamento de pacientes com osteoartrite de joelho que vivem em terreno montanhoso. MATERIAIS E MÉTODOS: Um total de 108 indivíduos com OAJ serão recrutados por amostragem aleatória simples para participar de um estudo randomizado, duplo-cego e controlado. Os indivíduos recrutados com OAJ serão divididos aleatoriamente em dois grupos, grupo TLAI (grupo experimental) e grupo FGI (grupo controle). A duração do tratamento de TLAI e FGI será de 8 minutos em uma sessão/articulação do joelho para cada dia, por 3 dias/semana até 8 semanas, além de seus exercícios convencionais por 30 minutos. O Western Ontario and Mc Master Universities Osteoarthritis Index, o algômetro digitalizado de pressão de dor e o questionário de 36 itens Short-Form Health Survey são as medidas de resultado que serão registradas ao término, no final do período pós-intervenção de 8 semanas. PERSPECTIVAS: Os resultados deste ensaio contribuirão para recomendações baseadas em evidências para a implicação clínica de que o TLAI não é pior que o FGI juntamente com a intervenção de exercício para tratar indivíduos com OAJ que vivem em terreno íngreme.

INTRODUCTION: People living in hilly terrain with abnormal cyclic loading could lead to bone cartilage degeneration. High-intensity laser therapy (HILT) and Ibuprofen gel phonophoresis (IGP) have innumerable benefits for patients with knee osteoarthritis (KOA). However, it is still unclear which treatment is effective among them in rehabilitating patients with KOA. OBJECTIVE: To verify whether 8-week HILT is no worse than the IGP in treating patients with knee osteoarthritis living in hilly terrain. MATERIALS AND METHODS: A total of 108 individuals with KOA will be recruited by simple random sampling to participate in a randomized, double-blind, controlled study. Recruited individuals with KOA will be randomly divided into two groups, the HILT group (experimental group) and the IGP group (active control group). The treatment duration of HILT and IGP will be 8 minutes in one session/knee joint for each day for 3 days/week up to 8 weeks in addition to their conventional exercises for 30 minutes. The Western Ontario and McMaster Universities Osteoarthritis Index, Digitalized pain pressure algometer, and 36-Item Short-Form Health Survey questionnaire are the outcome measures that will be recorded at baseline, end of the 8-week post-intervention period. PERSPECTIVES: The results from this trial will contribute to evidencebased recommendations for the clinical implication of whether HILT is no worse than IGP, along with exercise intervention for treating individuals with KOA living in hilly terrain.

Histone demethylase JMJD3 downregulation protects against aberrant force-induced osteoarthritis through epigenetic control of NR4A1 / 国际口腔科学杂志·英文版

Osteoarthritis (OA) is a prevalent joint disease with no effective treatment strategies. Aberrant mechanical stimuli was demonstrated to be an essential factor for OA pathogenesis. Although multiple studies have detected potential regulatory mechanisms underlying OA and have concentrated on developing novel treatment strategies, the epigenetic control of OA remains unclear. Histone demethylase JMJD3 has been reported to mediate multiple physiological and pathological processes, including cell differentiation, proliferation, autophagy, and apoptosis. However, the regulation of JMJD3 in aberrant force-related OA and its mediatory effect on disease progression are still unknown. In this work, we confirmed the upregulation of JMJD3 in aberrant force-induced cartilage injury in vitro and in vivo. Functionally, inhibition of JMJD3 by its inhibitor, GSK-J4, or downregulation of JMJD3 by adenovirus infection of sh-JMJD3 could alleviate the aberrant force-induced chondrocyte injury. Mechanistic investigation illustrated that aberrant force induces JMJD3 expression and then demethylates H3K27me3 at the NR4A1 promoter to promote its expression. Further experiments indicated that NR4A1 can regulate chondrocyte apoptosis, cartilage degeneration, extracellular matrix degradation, and inflammatory responses. In vivo, anterior cruciate ligament transection (ACLT) was performed to construct an OA model, and the therapeutic effect of GSK-J4 was validated. More importantly, we adopted a peptide-siRNA nanoplatform to deliver si-JMJD3 into articular cartilage, and the severity of joint degeneration was remarkably mitigated. Taken together, our findings demonstrated that JMJD3 is flow-responsive and epigenetically regulates OA progression. Our work provides evidences for JMJD3 inhibition as an innovative epigenetic therapy approach for joint diseases by utilizing p5RHH-siRNA nanocomplexes.

Kindlin-2 loss in condylar chondrocytes causes spontaneous osteoarthritic lesions in the temporomandibular joint in mice / 国际口腔科学杂志·英文版

The progressive destruction of condylar cartilage is a hallmark of the temporomandibular joint (TMJ) osteoarthritis (OA); however, its mechanism is incompletely understood. Here, we show that Kindlin-2, a key focal adhesion protein, is strongly detected in cells of mandibular condylar cartilage in mice. We find that genetic ablation of Kindlin-2 in aggrecan-expressing condylar chondrocytes induces multiple spontaneous osteoarthritic lesions, including progressive cartilage loss and deformation, surface fissures, and ectopic cartilage and bone formation in TMJ. Kindlin-2 loss significantly downregulates the expression of aggrecan, Col2a1 and Proteoglycan 4 (Prg4), all anabolic extracellular matrix proteins, and promotes catabolic metabolism in TMJ cartilage by inducing expression of Runx2 and Mmp13 in condylar chondrocytes. Kindlin-2 loss decreases TMJ chondrocyte proliferation in condylar cartilages. Furthermore, Kindlin-2 loss promotes the release of cytochrome c as well as caspase 3 activation, and accelerates chondrocyte apoptosis in vitro and TMJ. Collectively, these findings reveal a crucial role of Kindlin-2 in condylar chondrocytes to maintain TMJ homeostasis.

Experimental study of the response of articular cartilage surface roughness to load / 生物医学工程学杂志

Cartilage surface fibrosis is an early sign of osteoarthritis and cartilage surface damage is closely related to load. The purpose of this study was to study the relationship between cartilage surface roughness and load. By applying impact, compression and fatigue loads on fresh porcine articular cartilage, the rough value of cartilage surface was measured at an interval of 10 min each time and the change rule of roughness before and after loading was obtained. It was found that the load increased the roughness of cartilage surface and the increased value was related to the load size. The time of roughness returning to the initial condition was related to the load type and the load size. The impact load had the greatest influence on the roughness of cartilage surface, followed by the severe fatigue load, compression load and mild fatigue load. This article provides reference data for revealing the pathogenesis of early osteoarthritis and preventing and treating articular cartilage diseases.

Qualidade de vida segundo comorbidades mais prevalentes em idosos com o vírus da imunodeficiência adquirida / Quality of life according to the most prevalent comorbidities in the elderly with the acquired immunodeficiency virus / Calidad de vida según las comorbilidades más prevalentes en el anciano con el virus de la inmunodeficiencia adquirida

Objetivo: avaliar a qualidade de vida segundo as comorbidades mais prevalentes em idosos com HIV. Método: estudo transversal realizado com 241 idosos de ambos os sexos usuários dos serviços de referência para acompanhamento do paciente com HIV. Os dados foram obtidos por meio da entrevista face a face com o preenchimento de um questionário sociodemográfico e clínico além do HIV/AIDS Target-Quality of life. Resultados: as três comorbidades mais prevalentes foram hipertensão, diabetes e osteoporose e dentre todas as comorbidades encontradas, apenas a hipertensão e o diabetes não apresentaram diferença estatisticamente significante com nenhuma das dimensões do HIV/AIDS Target-Quality of life. Conclusão: osteoporose e osteoartrose são as comorbidades que tem impacto em mais dimensões da qualidade de vida

Objective: to assess quality of life according to the most prevalent comorbidities in elderly people with HIV. Method: cross-sectional study carried out with 241 elderly people of both sexes, users of reference services for monitoring HIV patients. The data were obtained through a face-to-face interview by completing a sociodemographic and clinical questionnaire in addition to the HIV / AIDS Target-Quality of life. Results: the three most prevalent comorbidities were hypertension, diabetes and osteoporosis and among all the comorbidities found, only hypertension and diabetes did not show a statistically significant difference with any of the dimensions of HIV / AIDS Target-Quality of life. Conclusion: osteoporosis and osteoarthritis are comorbidities that have an impact on more dimensions of quality of life

Objetivo: evaluar la calidad de vida según las comorbilidades más prevalentes en ancianos con VIH. Método: estudio transversal realizado con 241 ancianos de ambos sexos, usuarios de servicios de referencia para el seguimiento de pacientes con VIH. Los datos se obtuvieron a través de una entrevista presencial mediante la cumplimentación de un cuestionario sociodemográfico y clínico además de la HIV/AIDS Target-Quality of life. Resultados: las tres comorbilidades más prevalentes fueron hipertensión, diabetes y osteoporosis y entre todas las comorbilidades encontradas, solo la hipertensión y la diabetes no mostraron diferencia estadísticamente significativa con ninguna de las dimensiones de HIV/AIDS Target-Quality of life. Conclusión: la osteoporosis y la osteoartritis son comorbilidades que repercuten en más dimensiones de la calidad de vida

New topical microemulsions of etofenamate as sufficient management of osteoarthritis

Abstract In this study, microemulsions containing etofenamate were prepared and evaluated as dermal delivery carriers. The developed microemulsions consist of oleic acid, Span 80, Tween 20, Cremophor EL, Transcutol and ethanol. The percentage of etofenamate loading in the microemulsions was 5% (w/w). The characterization of formulations included droplet size, zeta potential, pH, conductivity, PDI, refractive index and viscosity. Moreover, ex vivo penetration study was carried out using mice abdominal skin. The developed formulations were analyzed for their cytotoxicity via MTT assay and tested for their anti-inflammatory properties opposed to LPS-stimulated nitrite prοduction in RAW 264.7 cells. As ideal formulation, M2ETF, was chosen due to its greater permeation, lower penetration as well as higher anti-inflammatory

Experimental study on the regulation of subchondral bone plate osteoprotegerin/receptor activator of nuclear factor kappa-B ligand system by berberine to retard the development of osteoarthritis in rabbits / 中国骨伤

OBJECTIVE@#To investigate the effect of intra-articular berberine injection on the structural remodeling of subchondral bone plate and osteoprotegerin/receptor activator of nuclear factor kappa-B ligand(OPG/RANKL) system expression in rabbits with osteoarthritis(OA).@*METHODS@#Forty 12-month-old male rabbits with an average of(2.73±0.18) kg of body weight, underwent left anterior cruciate ligament transection(ACLT), and were divided into berberine group and placebo groups after operation, 20 rabbits in each group. The berberine group received intra-articular injection of 100 μmol/L berberine 0.3 ml every week for 6 weeks. In placebo group, the same dose of 0.9% sodium chloride injection was injected into the left knee joint cavity every week for 6 weeks. Another 20 12-month-old male rabbits, weighing (2.68±0.18) kg, underwent sham operation on the left knee joint without intra-articular injection intervention (sham operation group). On the last day of the sixth week after operation, three groups of animals were sacrificed to obtain knee joint specimens. The femoral medial condyle samples were obtained for histological evaluation of cartilage and subchondral bone, Mankin scoring system was used to evaluate articular cartilage structure. Image-Pro Plus(IPP) software was used to evaluate subchondral bone plate bone volume(BV), bone volume/total volume(BV/TV), trabecular circumference(TC), mean trabecular thickness (Tb.Th). Real-time quantitative reverse transcription polymerization Enzyme chain reaction(reverse transcription-polymerase chain reaction, RT-PCR) was used to detect the mRNA expression levels of OPG and RANKL in subchondral bone tissue at 6 weeks after operation.@*RESULTS@#The cartilage structure evaluation showed that the surface of cartilage tissue in the sham operation group was smooth and flat, and the safranin coloration was full in the full thickness of the cartilage;the cartilage tissue in the berberine group showed uneven surface layer, and the staining of safranin O was mildly decreased;the surface layer fibrosis was seen in placebo group, Safranin O faded significantly. The Mankin score in the berberine group was lower than that in placebo group(P<0.01), but higher than that in sham operation group(P<0.01). The structural evaluation of subchondral bone plate showed that the trabecular bone in sham-operated group was densely arranged;after berberine intervention, the trabeculae were closely arranged;the subchondral bone trabeculae in placebo group were relatively sparse, and the distance between trabeculae was wider. Subchondral bone plate IPP software evaluation showed that BV, BV/TV, TC, Tb.Th in berberine group were higher than those in placebo group(P<0.01), BV, BV/TV, TC, Tb.Th in berberine group were higher than those in placebo group(P<0.01), while lower than the sham operation group (P<0.01). PCR test results showed that the expression of OPG mRNA in the berberine group was significantly higher than that in placebo group(P<0.01), and OPG mRNA in the berberine group was lower than that in sham operation group (P<0.01). There was no significant difference in mRNA expression of RANKL among three groups(P>0.05);the ratio of OPG/RANKL in berberine group was higher than that in placebo group(P<0.01), but lower than that in sham operation group(P<0.01).@*CONCLUSION@#Intra-articular injection of berberine can effectively inhibit the resorption of subchondral bone in the early stage of OA and delay the development of the disease. The specific mechanism may be that berberine maintains the balance of OPG/RANKL system by up-regulating the expression of OPG gene in subchondral bone.

Incidencia de infección en una cohorte histórica del registro nacional de las 1738 artroplastias de cadera operadas por artrosis en 2014 en Uruguay / Incidence of infection in a historical cohort from the national registry of 1738 hip arthroplasties operated for osteoarthritis in 2014 in Uruguay

Introducción: Las infecciones de artroplastia total de cadera tienen una incidencia baja, pero cuando suceden generan un problema sanitario no solo para el paciente, sino también para el sistema de salud. Las mismas pueden generar dolor, disminución de la capacidad funcional, pobre calidad de vida, múltiples cirugías, y en ocasiones, la muerte. Objetivos: Evaluar la incidencia nacional de infecciones en las artroplastias primarias de cadera operadas por artrosis en el 2014 en Uruguay, y los factores de riesgo vinculados al paciente, medio ambiente y acto quirúrgico, incluido el abordaje quirúrgico. Métodos: Estudio observacional analítico de todos los pacientes operados por artrosis. Se selecciona una muestra aleatoria de 633 pacientes, representativa de las 1738 artroplastias realizadas en Uruguay durante el año 2014. Mediante entrevista telefónica y revisión de historias clínicas se identificaron los pacientes con infección profunda del sitio quirúrgico. Se estimó la incidencia de infección y se realizó un análisis uni- multivariado mediante regresión logística para identificar factores asociados a la infección periprotésica profunda. Resultados: Se presentaron 8 infecciones, con una incidencia de 1,21 por ciento (IC 95 por ciento 0,59 ­ 2,20) en la población general. Los factores asociados a la infección protésica con significancia estadística fueron: a) IMC ≥ 35, p= 0,006; b) procedencia de Montevideo 2,07 por ciento (1,03 ­ 4,11) p= 0,031; c) procedencia del subsector privado 1,47 por ciento (0,77 ­ 2,78) p= 0,009; d) centro quirúrgico donde se realizó la cirugía 4,3 % (1,6 ­ 10,9) p= 0,03, e) uso de cemento con antibiótico 1,59 por ciento (0,65 ­ 3,25) p= 0,034. Se presentó sospecha de infección en 6 de 8 pacientes, en los primeros 30 días postoperatorios; a 7 de 8 pacientes se les realizó limpieza quirúrgica y solo a 1 de 8 pacientes se le realizó la revisión protésica definitiva. Conclusiones: La incidencia de infección en cirugía protésica electiva de cadera por artrosis en el Registro Nacional de Uruguay, fue similar a lo publicado en la bibliografía. De las variables frecuentemente citadas como incidentales en esta complicación, solo el índice de masa corporal fue asociado en esta serie. Llaman la atención las asociaciones dependientes de la procedencia, nivel socioeconómico y centro quirúrgico. Los resultados respecto al uso de cemento con antibiótico deben ser evaluados en estudios futuros(AU)

Introduction: Total hip arthroplasty infections have a low incidence, but when they occur they generate health problems for the patient, and for the health system. They can cause pain, decreased functional capacity, poor quality of life, multiple surgeries, and sometimes death. Objectives: To evaluate the national incidence of infections in primary hip arthroplasties operated for osteoarthritis in 2014, and the risk factors related to the patient, the environment and the surgical act, including the surgical approach. Methods: Analytical observational study of all patients operated on for osteoarthritis. A random sample of 633 patients was selected, representative of 1738 arthroplasties performed in Uruguay in 2014. Through a telephone interview and review of medical records, patients with deep infection of the surgical site were identified. The incidence of infection was estimated and univariate and multivariate analysis was performed using logistic regression to identify factors associated with deep periprosthetic infection. Results: There were 8 infections, with an incidence of 1.21 percent (95 percent CI 0.59 - 2.20) in the general population. The statistically significant factors associated with prosthetic infection were: a) BMI ≥ 35, p = 0.006; b) origin of Montevideo 2.07 percent(1.03 - 4.11) p = 0.031; c) origin of the private subsector 1.47 percent (0.77 - 2.78) p = 0.009; d) surgical center where the surgery was performed 4.3 percent(1.6 - 10.9) p = 0.03, e) use of cement with antibiotic 1.59 percent(0.65 - 3.25) p = 0.034. Suspicion of infection was presented in 6 of 8 patients, in the first 30 postoperative days; 7 of 8 patients underwent surgical cleaning and only 1 of 8 patients underwent final prosthetic revision. Conclusions: The incidence of infection in elective prosthetic hip surgery for osteoarthritis in the Uruguayan National Registry was similar to that published in the literature. Body mass index was the only variable associated as incidental to this complication in this series, out of those frequently cited. The associations depending on the origin, socioeconomic level and surgical center are striking. The results regarding the use of cement with antibiotics should be evaluated in future studies(AU)