ABSTRACT Objective To describe the technical specificities and feasibility of simulation of minimally invasive spine surgery in live pigs, as well as similarities and differences in comparison to surgery in humans. Methods A total of 22 Large White class swine models, weighing between 60 and 80kg, were submitted to surgical simulations, performed during theoretical-practical courses for training surgical techniques (microsurgical and endoscopic lumbar decompression; percutaneous pedicular instrumentation; lateral access to the thoracic spine, and anterior and retroperitoneal to the lumbar spine, and management of complications) by 86 spine surgeons. For each surgical technique, porcine anatomy (similarities and differences in relation to human anatomy), access route, and dimensions of the instruments and implants used were evaluated. Thus, the authors describe the feasibility of each operative simulation, as well as suggestions to optimize training. Study results are descriptive, with figures and drawings. Results Neural decompression surgeries (microsurgeries and endoscopic) and pedicular instrumentation presented higher similarities to surgery on humans. On the other hand, intradiscal procedures had limitations due to the narrow disc space in swines. We were able to simulate situations of surgical trauma in surgical complication scenarios, such as cerebrospinal fluid fistulas and excessive bleeding, with comparable realism to surgery on humans. Conclusion A porcine model for simulation of minimally invasive spinal surgical techniques had similarities with surgery on humans, and is therefore feasible for surgeon training.

RESUMO Cistos pericárdicos constituem 12-18% de todas as massas mediastinais. Geralmente, são assintomáticos e detectados incidentalmente, podendo manifestar sintomas quando alcançam um tamanho aumentado. Na maioria das vezes, estão situados no seio cardiofrênico direito, mas podem ocupar outra localização no mediastino. Neste artigo, relatamos uma torção de cisto pleuropericárdico após esforço físico, uma complicação raríssima dessa condição, cujo diagnóstico foi realizado por meio da tomografia computadorizada do tórax e confirmado posteriormente por videotoracoscopia.

ABSTRACT Pericardial cysts account for 12-18% of all mediastinal masses. They are usually asymptomatic and incidentally detected. However, when large, they can cause symptoms. Most pericardial cysts are located in the right cardiophrenic angle, but they can be anywhere in the mediastinum. We reported a pleuropericardial cyst torsion after physical stress, a very rare complication of this condition. The diagnosis was made by computed tomography and confirmed by video-assisted thoracoscopy.

Com o objetivo de se estabelecer diretrizes para a prevenção, o diagnóstico e o tratamento da hiperidrose compensatória, foram realizadas reuniões consensuais com a participação de cirurgiões torácicos filiados à Sociedade Brasileira de Cirurgia Torácica e um cirurgião geral em que foram abordados tópicos de modo a abranger conhecimentos multidisciplinares. A partir de textos recentes com diretrizes para a prevenção, o diagnóstico e tratamento (clínico e cirúrgico) da hiperidrose compensatória, e baseados em revisão bibliográfica, os participantes elaboraram um texto preliminar, cujas recomendações foram submetidas à aprovação dos participantes, possibilitando uma revisão geral do texto final. Deste modo, obteve-se um texto básico que, veiculado pela internet, tornou-se objeto de novas correções e revisões até alcançar a forma final atual.

With the objective of establishing guidelines for the prevention, diagnosis and treatment of compensatory hyperhidrosis, consensus meetings were held. Attendees included a general surgeon and thoracic surgeons affiliated with the Brazilian Society of Thoracic Surgery. The topics addressed were those that would ostensibly broaden multidisciplinary knowledge. Based on recent guidelines for the prevention, diagnosis and (clinical and surgical) treatment of compensatory hyperhidrosis, as well as on a review of the medical literature, the participants prepared a preliminary text, whose recommendations were revised and subsequently approved by all of the participants. The consensus text was posted on the Internet, becoming the object of further corrections and revisions prior to taking on its present form.

OBJETIVO: Apresentar resultados obtidos com a toracoscopia no tratamento do empiema pleural em pacientes pediátricos. MÉTODOS: Foram avaliados 117 empiemas pleurais, utilizando-se o mediastinoscópio ou a videotoracoscopia, com anestesia geral e sonda de intubação simples. As indicações para a intervenção cirúrgica foram: derrame pleural com ausência de resposta clínica e radiológica ao tratamento clínico (antibióticos, fisioterapia e toracocentese) ou sepse grave, e derrame pleural loculado (documentado por ultrassonografia ou tomografia computadorizada do tórax). RESULTADOS: De fevereiro de 1983 a julho de 2006, 117 toracoscopias foram realizadas em pacientes com idade entre 5 meses e 17 anos (média, 4 anos). O tempo médio de permanência do dreno torácico foi de 9 dias (2 a 33), e o tempo de internação hospitalar foi de 16,44 dias (4 a 49). Houve apenas um óbito (0,8%), e 33 pacientes (28%) tiveram como complicação fístula aérea prolongada. Em 7 pacientes (6%), houve necessidade de conversão para toracotomia com decorticação pulmonar em decorrência da organização do empiema. CONCLUSÕES: Não existe consenso para o tratamento do empiema pleural nesta faixa etária. A terapêutica cirúrgica é geralmente requisitada tardiamente no curso da doença, particularmente quando já existem múltiplas loculações ou quadro séptico grave. A toracoscopia indicada mais precocemente no tratamento do empiema pleural em pacientes pediátricos proporcionou uma melhor resposta à terapêutica clínica, aparentemente reduzindo o índice de morbi-mortalidade, o tempo de permanência do dreno torácico, o tempo de internação hospitalar e o tempo de antibioticoterapia.

OBJECTIVE: To evaluate the results of thoracoscopy for the treatment of pleural empyema in pediatric patients. METHODS: A retrospective study of 117 patients who underwent mediastinoscopy or video-assisted thoracoscopy for pleural empyema treatment. General anesthesia and single-lumen oral intubation were used. Surgery was indicated when there was pleural effusion and no clinical and radiological response to clinical treatment (antibiotics, physiotherapy and thoracocentesis) or severe sepsis, together with loculated pleural effusion (confirmed through ultrasound or computed tomography of the chest). RESULTS: Between February of 1983 and July of 2006, 117 thoracoscopies were performed in patients ranging in age from 5 months to 17 years (mean, 4 years). Mean time for thoracic drainage was 9 days (range, 2-33 days), and mean period of hospitalization was 16.4 days (range, 4 to 49 days). One patient (0.8%) died after surgery, and persistent fistula was observed in 33 patients (28%). In 7 cases (6%), open thoracotomy with pulmonary decortication was performed due to the disposition of the empyema. CONCLUSIONS: Management of pleural empyema in this age bracket is still controversial, and surgical indication is often delayed, particularly when there are multiple loculations or severe sepsis. Early thoracoscopy yields a better clinical outcome for pediatric patients with pleural empyema, with apparent decreased morbidity and mortality, earlier chest tube removal, earlier hospital discharge and improved response to antibiotic therapy.

A mediastinite esclerosante é uma doença rara, caracterizada por tecido fibrótico mediastinal extenso, que mimetiza uma neoplasia devido à compressão ou invasão das estruturas mediastinais. Apresentamos três casos de síndrome de veia cava superior em que se comprovou a mediastinite esclerosante. A fisiopatologia relaciona-se a adenomegalias mediastinais, proliferação de fibroblastos e deposição de colágeno. As principais causas são histoplasmose e tuberculose, doenças prevalentes em nosso meio. O diagnóstico histopatológico geralmente é difícil por métodos pouco invasivos. Necessita-se de exploração cirúrgica para o diagnóstico definitivo e resolução da obstrução das vias aerodigestiva e vascular, uma vez que não há tratamento clínico efetivo para esta afecção.

Sclerosing mediastinitis is a rare disorder characterized by an extensive fibrotic reaction involving the mediastinum. Due to the compression or invasion of mediastinal structures, the disorder mimics neoplasia. We present three cases of superior vena cava syndrome in which sclerosing mediastinitis was confirmed. The pathophysiological process is related to enlarged mediastinal lymph nodes, fibroblast proliferation and collagen deposition. The main causes of sclerosing mediastinitis are histoplasmosis and tuberculosis, both of which are prevalent in Brazil. It is difficult to make an accurate histopathological diagnosis using minimally invasive methods, and there is no effective treatment for this condition. In order to make a definitive diagnosis and resolve the aerodigestive tract obstruction, exploratory surgery is indicated.