RESUMEN
Queimaduras de segundo grau são especialmente dolorosas em crianças. A cada dia que passa, a pele queimada tende a cicatrizar, mas há momentos em que a área lesada fica pior devido a curativos inadequados ou à infecção. A utilização de substitutivos dérmicos deve ser considerada. Relatamos a utilização de aloenxerto de pele como um substitutivo dérmico transitório, a fim de diminuir a dor e promover a reepitelização em queimaduras dolorosas de segundo grau. A redução da dor foi completa após o uso do aloenxerto de pele. A criança obteve reepitelização completa da área lesada, não necessitando de internação e enxerto autólogo. Aloenxertos podem representar uma possibilidade de cobertura temporária para queimaduras dolorosas de segundo grau em crianças.
Second-degree burns are especially painful in children. With each passing day, the burned skin tends to heal, but there are times when the injured area gets worst due to inadequate dressing or infection. The use of dermal substitutes must be considered. We report the use of skin allograft as a transitory dermal substitute in order to decrease pain and promote re-epithelialization in painful second-degree burns. The child got complete re-epithelialization of the injured area, not requiring hospitalization and skin grafts. The pain reduction was complete after using skin allograft. Allografts may represent a possibility of temporary coverage in painful second-degree burns in children.
Asunto(s)
Humanos , Lactante , Quemaduras/terapia , Manejo del Dolor , Alotrasplante Compuesto Vascularizado/métodos , Infecciones/etiología , Obtención de Tejidos y ÓrganosRESUMEN
PURPOSE: To demonstrate an experimental model of up to four hours a week of independent study that allows relearning in microvascular sutures. METHODS: Wistar rats between 200 and 500 grams surplus research experiments were used. Femoral vessels are covered on one or both sides through a groin incision obliquely along the inguinal ligament. Femoral artery and vein are isolated and measured being clamped and cut. The individual performs in microvascular anastomosis complexity arterial and venous terminoterminal sequence. terminolateral and venous and arterial grafts in vessels. Permeability is evaluated by testing vascular patency after creation of microvascular anastomosis. RESULTS: In the first specimen, only arterial and venous vascular anastomosis are performed terminoterminal. The average diameter of the femoral veins varies from 0.8 to 2 mm between rodents (artery, between 0.6 and 1.4 mm, between 0.8 and 2 mm vein). The superficiality of the vessels allows faster dissection, may also be held in other inguinal region. CONCLUSION: The model of individual retraining allows learning microvascular suture in individuals of permanent staff.
Asunto(s)
Educación Médica/métodos , Microcirugia/educación , Modelos Animales , Técnicas de Sutura/educación , Procedimientos Quirúrgicos Vasculares/educación , Anastomosis Quirúrgica , Animales , Arteria Femoral/cirugía , Vena Femoral/cirugía , Microcirugia/métodos , Ratas , Ratas Wistar , Reproducibilidad de los Resultados , Cirugía Plástica/educación , Factores de Tiempo , Procedimientos Quirúrgicos Vasculares/métodosRESUMEN
PURPOSE: To present an animal model to assess the effects of end-to-side innervation in the heterotopically transplanted model with reduced chances of neural contamination. METHODS: The medial portion of the gastrocnemius muscle in wistar male rats was isolated and its pedicle dissected and performed a flap in the abdominal portion. To prevent neural contamination in the abdominal region, the muscle was wrapped with a Goretex(r) sheet. The specimens were divided into 2 groups (G). In G1 was performed an end-to-end suture between tibial nerve of the gastrocnemius and femoral motor nerve and between the saphenous sensory nerve and the motor nerve. In G2 was performed a end-to-side suture between the tibial nerve and the motor femoral and between the tibial nerve and saphenous motor nerve. The specimens were evaluated 60 days later to check the structure of the neurorraphy. Sections were obtained proximal and distal to the coaptation site. RESULTS: The medial gastrocnemius muscle had the advantage of maintaining visible mass after 60 days. No disruption of the coaptation site was found. No major injury to the donor nerve was seen in group 2. CONCLUSION: The proposed model is simple, reproduciple and prevent the neural contamination in the flap in end-to-side suture.
Asunto(s)
Modelos Animales , Músculo Esquelético/inervación , Músculo Esquelético/trasplante , Transferencia de Nervios/métodos , Técnicas de Sutura , Trasplante Heterotópico/métodos , Animales , Nervio Femoral/trasplante , Masculino , Microscopía Electrónica , Microcirugia/métodos , Ratas Wistar , Procedimientos de Cirugía Plástica/métodos , Reproducibilidad de los Resultados , Colgajos Quirúrgicos , Nervio Tibial/trasplante , Factores de TiempoRESUMEN
PURPOSE: To present an animal model to assess the effects of end-to-side innervation in the heterotopically transplanted model with reduced chances of neural contamination. METHODS: The medial portion of the gastrocnemius muscle in wistar male rats was isolated and its pedicle dissected and performed a flap in the abdominal portion. To prevent neural contamination in the abdominal region, the muscle was wrapped with a Goretex(r) sheet. The specimens were divided into 2 groups (G). In G1 was performed an end-to-end suture between tibial nerve of the gastrocnemius and femoral motor nerve and between the saphenous sensory nerve and the motor nerve. In G2 was performed a end-to-side suture between the tibial nerve and the motor femoral and between the tibial nerve and saphenous motor nerve. The specimens were evaluated 60 days later to check the structure of the neurorraphy. Sections were obtained proximal and distal to the coaptation site. RESULTS: The medial gastrocnemius muscle had the advantage of maintaining visible mass after 60 days. No disruption of the coaptation site was found. No major injury to the donor nerve was seen in group 2. CONCLUSION: The proposed model is simple, reproduciple and prevent the neural contamination in the flap in end-to-side suture. .
Asunto(s)
Animales , Masculino , Modelos Animales , Músculo Esquelético/inervación , Músculo Esquelético/trasplante , Transferencia de Nervios/métodos , Técnicas de Sutura , Trasplante Heterotópico/métodos , Nervio Femoral/trasplante , Microscopía Electrónica , Microcirugia/métodos , Ratas Wistar , Reproducibilidad de los Resultados , Procedimientos de Cirugía Plástica/métodos , Colgajos Quirúrgicos , Factores de Tiempo , Nervio Tibial/trasplanteRESUMEN
PURPOSE: To demonstrate an experimental model of up to four hours a week of independent study that allows relearning in microvascular sutures. METHODS: Wistar rats between 200 and 500 grams surplus research experiments were used. Femoral vessels are covered on one or both sides through a groin incision obliquely along the inguinal ligament. Femoral artery and vein are isolated and measured being clamped and cut. The individual performs in microvascular anastomosis complexity arterial and venous terminoterminal sequence. terminolateral and venous and arterial grafts in vessels. Permeability is evaluated by testing vascular patency after creation of microvascular anastomosis. RESULTS: In the first specimen, only arterial and venous vascular anastomosis are performed terminoterminal. The average diameter of the femoral veins varies from 0.8 to 2 mm between rodents (artery, between 0.6 and 1.4 mm, between 0.8 and 2 mm vein). The superficiality of the vessels allows faster dissection, may also be held in other inguinal region. CONCLUSION: The model of individual retraining allows learning microvascular suture in individuals of permanent staff. .
Asunto(s)
Animales , Ratas , Educación Médica/métodos , Modelos Animales , Microcirugia/educación , Técnicas de Sutura/educación , Procedimientos Quirúrgicos Vasculares/educación , Anastomosis Quirúrgica , Arteria Femoral/cirugía , Vena Femoral/cirugía , Microcirugia/métodos , Ratas Wistar , Reproducibilidad de los Resultados , Cirugía Plástica/educación , Factores de Tiempo , Procedimientos Quirúrgicos Vasculares/métodosRESUMEN
OBJETIVO: Através de um modelo experimental, pretendemos criar inferências sobre a viabilidade do enxerto ósseo vascularizado da crista ilíaca em ratos e verificar suas características histológicas. MÉTODO: Foram utilizados 21 ratos, que foram divididos em dois grupos: o primeiro consistindo por animais submetidos à técnica de enxerto ósseo vascularizado e pediculado sobre o ramo ilíaco da artéria iliolombar; o segundo (grupo controle) sofreu o mesmo procedimento do primeiro com a adição da ligadura do pedículo vascular. A viabilidade dos enxertos ósseos foi verificada durante três semanas, através da visualização direta do enxerto, histologia e imunoistoquímica. RESULTADOS: Todos os enxertos vascularizados avaliados na primeira semana apresentaram viabilidade segundo a observação direta, histologia e imunoistoquímica. Entretanto, na segunda e terceira semanas os enxertos mostraram-se inviáveis em 75% dos casos quando submetidos à avaliação segundo a observação direta e em 50% dos casos quando realizada a análise histológica e imunoistoquímica. CONCLUSÃO: Alguns enxertos vascularizados em sua concepção tornaram-se inviáveis e passaram a se comportar como enxertos não vascularizados sob a análise da observação direta e histológica. Apesar da possibilidade de falha, o uso de enxertos ósseos vascularizados deve ser incentivado, pois a histologia descritiva demonstrou maior densidade celular na porção óssea medular, osteócitos com maior funcionalidade na deposição de matriz óssea, com rede vascular intraóssea preservada.
OBJECTIVE: Through an experimental model, our aim was to create inferences about the viability of vascularized bone grafts from the iliac crest in rats and investigate their histological features. METHODS: Twenty-one rats were used, divided into two groups: the first consisted of animals that were subjected to the technique of vascularized bone graft pedicled onto the iliac branch of the iliolumbar artery; the second (control group) underwent the same procedure as performed on the first group, with the addition of ligation of the vascular pedicle. The viability of the bone grafts was observed for three weeks, by means of direct observation of the graft, histology and immunohistochemistry. RESULTS: All the vascularized grafts evaluated in the first week showed viability according to direct observation, histology and immunohistochemistry. However, in the second and third weeks, direct observation showed that 75% of the grafts were unviable, while histological analysis and immunohistochemistry showed that 50% were unviable. CONCLUSIONS: Some grafts that are designed to be vascularized became unviable and began to behave like nonvascularized grafts under direct observation and histology. Despite the possibility of failure, use of vascularized bone grafts should be encouraged, because descriptive histology shows greater cell density in the medullary bone portion, and osteocytes that function better regarding deposition of bone matrix, with preservation of the intraosseous vascular network.
Asunto(s)
Animales , Ratas , Matriz Ósea , Trasplante Óseo , Histología , Inmunohistoquímica , Modelos AnimalesRESUMEN
BACKGROUND: The aim of this study was to experimentally compare end-to-end and end-to-side neurorrhaphy in perineural window model after motor nerve lesion, evaluating which one was the most effective to preserve nerves. Also, differences in motor and sensorial nerve regeneration were tested to verify differences in nerve regeneration. METHODS: A total of 20 adult male Wistar rats were randomly assigned to 5 groups, and, in each one, a different treatment was performed: besides the control group, and end-to-end or end-to-side graft with motor or sensorial nerves was performed. Silastic sheet was used as a mechanical barrier to prevent innervation from adjacent nerves. After 16 weeks, the specimens were histologically assessed and wet weight was evaluated as a direct parameter of atrophy. RESULTS: The end-to-end neurorrhaphy group presented the best results in terms of mass preservation, but it did not differ significantly from the control group. Motor nerves presented similar results in muscular atrophy. The end-to-side neurorrhaphy group with sensory nerve as donor showed the worst results. CONCLUSIONS: The use of sensory nerves to preserve skeletal muscle trophism is not justified, since, according to our model, it affects 50% to 80% of the muscle mass in a period of 16 weeks. End-to-side neurorrhaphy was demonstrated to be an option for re-enervation of a nerve-deprived motor muscle in selected cases.
Asunto(s)
Músculo Esquelético/inervación , Traumatismos de los Nervios Periféricos/cirugía , Nervios Periféricos/trasplante , Procedimientos de Cirugía Plástica/métodos , Colgajos Quirúrgicos/inervación , Anastomosis Quirúrgica/métodos , Animales , Masculino , Neuronas Motoras/fisiología , Desnervación Muscular , Músculo Esquelético/patología , Músculo Esquelético/trasplante , Atrofia Muscular/etiología , Atrofia Muscular/prevención & control , Regeneración Nerviosa , Neuronas Aferentes/fisiología , Traumatismos de los Nervios Periféricos/etiología , Distribución Aleatoria , Ratas , Ratas Wistar , Colgajos Quirúrgicos/patología , Nervio Tibial/fisiología , Nervio Tibial/cirugíaRESUMEN
A incidência dos neoplasmas de pele aumentou muito nas últimas décadas. As exigências estéticas também. O nariz é o centro da face e também local frequente do carcinoma basocelular, o câncer de pele mais comum. Pequenas distorções na arquitetura dessa região podem produzir efeitos estéticos e funcionais indesejáveis, mas a reconstrução deve ser realizada com o cuidado de não dificultar o controle local da neoplasia.
The incidence of skin neoplasms has increased greatly in recent decades, and the aesthetic demands too. The nose is the center of the face and also a frequent site of basal cell carcinoma, the most common skin cancer. Small distortions in the architecture of this region can produce undesirable aesthetic and functional effects, but the reconstruction must be undertaken carefully so as not to hamper the local control of the neoplasm.
Asunto(s)
Humanos , Carcinoma Basocelular , Neoplasias Cutáneas , Neoplasias NasalesRESUMEN
No mesossalpinge, entre a trompa e o ovário, está situado o paraovário. Os cistos paraovarianos originam-se de estruturas vestigiais de Wolff, do epitélio tubário ou de incluções peritoneais. Raramente atinguem tamanho de cisto do próprio ovário. Os autores relatam um raro caso de cisto paraovariano gigante