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1.
Arq Bras Cir Dig ; 27(1): 26-9, 2014.
Article in English | MEDLINE | ID: mdl-24676294

ABSTRACT

BACKGROUND: The use of alloplastic meshes has been historically contra-indicated in patients with infection. AIM: To evaluate the use of polypropylene meshes in the treatment of abdominal wall defects in rats with peritonitis. METHODS: Twenty Wistar female rats were divided into two groups: induction of peritonitis (test group) and without peritonitis (control group). An abdominal wall defect was created in all animals, and polypropylene mesh was applied. The evaluation of the tensile strength of the mesh was carried out using tensiometer and microscopic analysis of the healing area was done. RESULTS: More adhesion of the mesh to the rat abdominal wall was observed in test group. The histopathological analyses showed prevalence of moderate to accentuated granulation tissue in both groups, without significant differences. CONCLUSION: The use of the mesh coverage on abdominal wall defects of rats with induced peritonitis did not show worse results than its use in healthy animals, nor was its integration to the resident tissue any worse.


Subject(s)
Abdominal Wound Closure Techniques/instrumentation , Biocompatible Materials , Peritonitis/surgery , Polypropylenes , Surgical Mesh , Animals , Equipment Design , Female , Rats , Rats, Wistar
2.
ABCD (São Paulo, Impr.) ; 27(1): 26-29, Jan-Mar/2014.
Article in English | LILACS | ID: lil-703983

ABSTRACT

Background : The use of alloplastic meshes has been historically contra-indicated in patients with infection. Aim : To evaluate the use of polypropylene meshes in the treatment of abdominal wall defects in rats with peritonitis. Methods : Twenty Wistar female rats were divided into two groups: induction of peritonitis (test group) and without peritonitis (control group). An abdominal wall defect was created in all animals, and polypropylene mesh was applied. The evaluation of the tensile strength of the mesh was carried out using tensiometer and microscopic analysis of the healing area was done. Results : More adhesion of the mesh to the rat abdominal wall was observed in test group. The histopathological analyses showed prevalence of moderate to accentuated granulation tissue in both groups, without significant differences. Conclusion : The use of the mesh coverage on abdominal wall defects of rats with induced peritonitis did not show worse results than its use in healthy animals, nor was its integration to the resident tissue any worse. .


Racional: O uso de telas inorgânicas historicamente é contra-indicado em paciente com infecções. Objetivo : Avaliar o comportamento e cicatrização de paredes abdominais com uso de telas de polipropileno após infecções intra-cavitárias. Método : Foram estudadas 20 ratas Wistar aleatoriamente divididas nos grupos Estudo (com peritonite) e Controle (sem peritonite). Um defeito na parede abdominal foi criado em todos os animais, onde foi aplicada tela de polipropileno. Foi feita avaliação da força de tensão com uso de tensiômetro, além de análise histológica da área cicatricial. Resultados : Observou-se maior adesividade da tela às paredes dos animais do grupo Estudo quando comparado ao grupo Controle. A análise histopatológica mostrou prevalência de tecido de granulação de acentuado à moderado em ambos os grupos, sem diferença significativa. Conclusão : O uso de telas inorgânicas nos defeitos da parede abdominal em ratos com peritonite induzida não mostrou resultado pior do que aquele obtido de animais sem infecção, tanto em relação à sua integração quanto ao tecido cicatricial no defeito da parede abdominal. .


Subject(s)
Animals , Female , Rats , Abdominal Wound Closure Techniques/instrumentation , Biocompatible Materials , Peritonitis/surgery , Polypropylenes , Surgical Mesh , Equipment Design , Rats, Wistar
3.
Rev. méd. Minas Gerais ; 22(2)jun. 2012.
Article in Portuguese | LILACS | ID: lil-684752

ABSTRACT

Introdução: o sildenafil pertence a uma classe relativamente nova de medicamentos, cujo mecanismo de ação ocorre por inibição da fosfodiesterase-5, que é responsável pela degradação intracelular da guanosina monofosfato cíclica (GMPc). A GMPc promove vasodilatação, alteração no perfil de granulação plaquetária e angiogênese. Nesse contexto, seus efeitos vasoativos podem aumentar o fluxo sanguíneo de retalhos, melhorando a sua viabilidade. Este estudo tem como objetivo avaliar a viabilidade de retalhos cutâneos de ratos à McFarlane após a administração de sildenafil pela via intraperitoneal. Métodos: 20 ratos Wistar foram distribuídos em dois grupos - controle (confecção do retalho cutâneo dorsal, aplicação intraperitoneal de solução salina a 0,9%) e estudo (confecção do retalho cutâneo dorsal, aplicação intraperitoneal de sildenafil). Sete dias após a operação, os retalhos foram fotografados e representados graficamente, para serem analisados com o programa AutoCad. Três biópsias (cranial, média e caudal) foram coletadas de cada retalho, para análise histológica. Resultados: à análise macroscópica, o uso do sildenafil pela via intraperitoneal esteve associado à maior contração tecidual (p=0,019). O estudo histológico evidenciou menos granulação associada a polimorfonucleares no terço distal dos retalhos (p=0,001) e mais necrose interpondo os locais de granulação no terço médio dos retalhos (p=0,011). Conclusão: o sildenafil intraperitoneal não se mostrou eficaz para melhorar a viabilidade de retalhos à McFarlane em ratos. Outros estudos talvez possam esclarecer o seu mecanismo de ação para a contração tecidual.


Sildenafil belong to a relatively new class of drugs. Its mechanism of action consists of inhibiting phosphodiesterase-5, which is responsible for the intracellular degradation of cyclic monophosphate guanosine (CMPG). CMPG leads to vasodilation, platelet granulation change, and angiogenesis. CMPG vasoactive effects can increase the blood flows of the flaps, improving their viability. This study aims to assess the viability of McFarland skin flaps after intraperitoneal sildenafil administration. Methods: In total, 20 Wistar mice were distributed in two groups: control (production of dorsal skin flap, intraperitoneal applicatdion of 0.9 % salt solution), and study (production of dorsal skin flap with intraperitoneal application of sildenafil). Skin flaps were photographed seven days after operation and represented graphically with a view to AutoCad-based analysis. Three biopsies (cranial, middle, and caudal) were collected for histological analysis of each flap. Results The macroscopic analysis showed that intraperitoneal application of sildenafil was associated with stronger tissue contraction (p=0.019). The histological study showed less granulation associated with polymorphonuclears in the distal third of the flaps (p=0.001) and more necrosis in granulation sites in the middle third of the flaps (p=0.011). Conclusion: The intraperitoneal application of sildenafil was not effective in improving the viability of McFarlane skin flaps in mice. Other studies may shed light into its mechanism of action for tissue contraction.


Subject(s)
Animals , Rats , Wound Healing , Guanosine Monophosphate/therapeutic use , Surgical Flaps/blood supply , Rats, Wistar
4.
Surg Today ; 41(12): 1644-8, 2011 Dec.
Article in English | MEDLINE | ID: mdl-21969199

ABSTRACT

This report presents two cases of young males who developed the rare idiopathic form of sclerosing encapsulating peritonitis (SEP) presented as partial bowel obstruction, both diagnosed during surgical treatment, with satisfactory outcomes. Sclerosing encapsulating peritonitis is a rare and enigmatic condition, characterized by intraperitoneal fibrosclerosis, which causes intestinal obstruction. It is a chronic entity with a poorly elucidated pathophysiology, leading to the constitution of a thick white nacreous fibrosis membrane that wraps the bowel in a concertina-like fashion with some adhesions configuring an intra-abdominal cocoon. Sclerosing encapsulating peritonitis is reported in a wide variety of patients, including those who have undergone peritoneal dialysis, young adolescent girls, cirrhotic patients after peritoneal-venous shunting, and patients treated with ß-blockers. Nevertheless, the etiology of SEP remains obscure. This entity presents many difficulties in preoperative diagnosis because of its peculiar characteristics. Recognition of the SEP results in proper management and prevents unnecessary bowel resection. Regardless of cause, the treatment of the obstruction is surgical, with dissection of the encasing membrane from the intestine and separation of adherent loops of small bowel until they are laid free and returned to their normal configuration. The prognosis after appropriate surgical therapy is good, but depends on coexisting diseases.


Subject(s)
Intestinal Obstruction/etiology , Intestines/pathology , Peritonitis/etiology , Adult , Fibrosis , Humans , Intestinal Obstruction/surgery , Intestines/surgery , Male , Peritoneum/pathology , Peritoneum/surgery , Peritonitis/surgery , Sclerosis/complications
5.
Acta Cir Bras ; 26(4): 314-9, 2011 Aug.
Article in English | MEDLINE | ID: mdl-21808846

ABSTRACT

PURPOSE: To assess the viability of McFarlane skin flaps in rats with administration of sildenafil. METHODS: Twenty Wistar rats were distributed into two groups: Control (dorsal skin flap, subdermal application of saline solution at 0.9%) and Study (dorsal skin flap, subdermal application of sildenafil). Seven days after the surgery, flaps were photographed and graphically rendered. Then, they were analyzed with AutoCAD software. Three biopsies (proximal, medial and distal) of each flap were collected for histological analysis. RESULTS: Macroscopic analysis showed that animals of the study group had greater necrotic areas (p=0.003) in the dorsal skin flaps. Additionally, histological analysis of the distal third of these flaps showed a tendency to less granulated tissue formation in animals treated with sildenafil. CONCLUSION: Sildenafil subdermally was associated with lower viability of the random skin flap in rats.


Subject(s)
Phosphodiesterase 5 Inhibitors/pharmacology , Piperazines/pharmacology , Skin/drug effects , Sulfones/pharmacology , Surgical Flaps/pathology , Tissue Survival/drug effects , Animals , Biopsy , Dermatologic Surgical Procedures , Female , Necrosis/pathology , Purines/pharmacology , Rats , Rats, Wistar , Sildenafil Citrate , Skin/pathology , Wound Healing
6.
Acta cir. bras ; 26(4): 314-319, July-Aug. 2011. ilus, tab
Article in English | LILACS | ID: lil-594353

ABSTRACT

PURPOSE: To assess the viability of McFarlane skin flaps in rats with administration of sildenafil. METHODS: Twenty Wistar rats were distributed into two groups: Control (dorsal skin flap, subdermal application of saline solution at 0.9 percent) and Study (dorsal skin flap, subdermal application of sildenafil). Seven days after the surgery, flaps were photographed and graphically rendered. Then, they were analyzed with AutoCAD software. Three biopsies (proximal, medial and distal) of each flap were collected for histological analysis. RESULTS: Macroscopic analysis showed that animals of the study group had greater necrotic areas (p=0.003) in the dorsal skin flaps. Additionally, histological analysis of the distal third of these flaps showed a tendency to less granulated tissue formation in animals treated with sildenafil. CONCLUSION: Sildenafil subdermally was associated with lower viability of the random skin flap in rats.


OBJETIVO: Avaliar a viabilidade de retalhos cutâneos de ratos à McFarlane após a administração de sildenafil. MÉTODOS: Vinte ratos Wistar foram distribuídos em dois grupos: Controle (confecção do retalho cutâneo dorsal, aplicação subdérmica de solução salina a 0,9 por cento) e Estudo (confecção do retalho cutâneo dorsal, aplicação subdérmica de sildenafil). Sete dias após a operação, os retalhos foram fotografados e representados graficamente, para serem analisados com o programa AutoCad. Três biópsias (cranial, média e caudal) foram coletadas de cada retalho, para análise histológica. RESULTADOS: A análise macroscópica evidenciou que os animais do grupo Estudo apresentaram maiores áreas de necrose (p=0,003) nos retalhos cutâneos dorsais. Além disso, a análise histológica dos terços distais dos retalhos mostrou uma tendência à formação de menos tecido de granulação nos animais que receberam o sildenafil. CONCLUSÃO: O sildenafil subdérmico esteve associado com uma pior viabilidade tecidual dos retalhos cutâneos dorsais de ratos.


Subject(s)
Animals , Female , Rats , /pharmacology , Piperazines/pharmacology , Skin/drug effects , Sulfones/pharmacology , Surgical Flaps/pathology , Tissue Survival/drug effects , Biopsy , Necrosis/pathology , Purines/pharmacology , Rats, Wistar , Skin/pathology , Skin/surgery , Wound Healing
7.
Arq Gastroenterol ; 42(2): 95-8, 2005.
Article in Portuguese | MEDLINE | ID: mdl-16127564

ABSTRACT

BACKGROUND: Anastomotic leakage is a major cause of mortality in colorectal surgery. Several methods have been evaluated in order to prevent anastomotic leakage, and was postulate that povidone-iodine irrigation of colon before anastomosis can improve anastomotic healing, prevent adhesion formation, and may be beneficial in patients undergoing gastrointestinal surgery. AIM: To evaluates the efficacy of this agent in healing of colonic anastomosis in rats. MATERIAL AND METHODS: Twenty Wistar rats were divided into two groups: Group A (n = 10), cleaning of anastomotic borders with saline solution, and group B (n = 10), cleaning of anastomotic borders with 5% povidone-iodine. The animals were submitted to laparotomy, section of colon and treatment according previously described. After anastomosis, the animals were observed, and killed in 7th postoperative day. Blood samples were collected to serum albumin measurement and anastomosis observed macroscopically in relation to presence of fistula, adhesion and dilatation. A 6 cm colonic segment with the anastomosis at the center was excised bursting pressure was determined. RESULT: There was no fistula in any animal in both groups, and there was no difference in relation to obstruction, presence of adhesion or bursting pressure when compared group A and B. CONCLUSION: The use of povidone-iodine was not able to improve anastomotic healing in rats.


Subject(s)
Colon/surgery , Povidone-Iodine/administration & dosage , Wound Healing/drug effects , Anastomosis, Surgical , Animals , Female , Rats , Rats, Wistar , Surgical Wound Dehiscence/prevention & control , Tensile Strength/drug effects , Therapeutic Irrigation/methods , Tissue Adhesions/prevention & control , Treatment Outcome
8.
Arq. gastroenterol ; 42(2): 95-98, abr.-jun. 2005.
Article in Portuguese | LILACS | ID: lil-410678

ABSTRACT

RACIONAL: Dados da literatura sugerem que, possivelmente, a lavagem intraluminar de segmentos do tubo digestivo com povidona-iodine antes da execução de uma anastomose poderia favorecer a cicatrização dessas anastomoses e prevenir a formação de aderências perianastomóticas, podendo ser útil se empregada em pacientes submetidos cirurgias do trato digestivo. OBJETIVO: Avaliar a eficácia da lavagem das bordas entéricas com povidona-iodine a 5 por cento sobre a cicatrização do cólon direito de ratos. MATERIAL E MÉTODOS: Estudaram-se 20 ratos Wistar divididos nos seguintes grupos: A (n = 10), limpeza das bordas da ferida colônica com solução salina a 0,9 por cento; B (n = 10), limpeza das bordas da ferida colônica com solução de povidona-iodine a 5 por cento. Os animais foram submetidos a laparotomia, secção de 75 por cento da circunferência do cólon, preservando 25 por cento da borda mesentérica e tratamento das bordas a serem anastomosadas segundo o grupo descrito acima. Após a realização das anastomoses, os animais foram observados durante 7 dias e, no 7º dia pós-operatório, mortos. Foram coletadas amostras de sangue para dosagem da albumina sérica e feita análise macroscópica das anastomoses, observando-se presença de fístula, aderências e dilatação acima da anastomose. O segmento contendo a anastomose colônica foi retirado com 3 cm de cólon intacto em torno da anastomose e feita medida da pressão de ruptura. RESULTADOS: Não se observou presença de fístula em nenhum animal dos grupos estudados. Não houve diferença significativa em relação à presença de estenose da anastomose, aderências ou no valor da pressão de ruptura quando comparados os dois grupos. CONCLUSÃO: O emprego da povidona-iodine não resultou em aumento da resistência tênsil das anastomoses do cólon direito de ratos.


Subject(s)
Animals , Female , Rats , Colon/surgery , Povidone-Iodine/administration & dosage , Wound Healing/drug effects , Anastomosis, Surgical , Rats, Wistar , Surgical Wound Dehiscence/prevention & control , Therapeutic Irrigation , Tissue Adhesions , Treatment Outcome , Tensile Strength/drug effects
9.
Pulmäo RJ ; 10(4): 48-52, 2001. ilus, tab
Article in Portuguese | LILACS | ID: lil-764311

ABSTRACT

Introdução: A nova Pinça Aerostática foi projetada tomando por base os modelos Satinsky e DeBakey. A Pinça Aerostática possui em sua extremidade duas barras paralelas, seus ramos são conectados através de articulação do tipo "joint-box". Objetivos do estudo: 1) Descrever a nova Pinça Aerostática; 2) Analisar as vantagens do uso da Pinça. Casuística e métodos: A Pinça Aerostática foi utilizada em 57 cirurgias, realizadas nos hospitais Universitários (HU-UFJF) e Monte Sinai de Juiz de Fora (MG), no período de dezembro de 1998 a setembro de 2001. Foram avaliados: sexo e idade dos pacientes, tipo de cirurgia, duração do ato cirúrgico, tamanho da incisão, tempo de permanência do dreno e o custo do material cirúrgico utilizado. Resultados: Foram realizadas 57 cirurgias em 54 pacientes, com idade média de 56,25 anos (6-79). Trinta e três pacientes pertenciam ao sexo masculino (61%). A Pinça foi utilizada nas seguintes cirurgias: BP=50,877%; CRVP=22,807%; RN=12,281%; BU=8,772% e CI=5,263% dos casos. O tempo médio de cirurgia foi: 73,19 min para as BP; 83 min para as RN; 114,25 min para as CRPV; 155,8 min para BU; 193,3 min para as CI. O tempo médio de drenagem intercostal foi de: 1,7 dias para as BP; 2,16 dias para as RN; 1,66 dias nas CI; 4 dias nas BU e 7,33 dias nas CRVP. Conclusão: A Pinça Aerostática permitiu: diminuição do tempo operatório, redução nos gastos operatórios, rápida retirada do dreno torácico, resultando em maior conforto para os nossos pacientes.


Introduction: The development of a clamp called Aerostatic, which was made based on the Satinsky and Debakey standars, is demonstrated. Differing from the previously-mentioned styles, the new model has two parallel bars at its extremity. Objectives of the study: The purpose of this study is: 1) to describe the new Aerostatic Pincers, comparing their characteristics to the Satinsky and DeBakey standarda; 2) to report our experience in using the Aerostatic Pincers, stating the advantages of their application in some surgeries such as lung biopses, atypical segmentectomies for the resection of lung nodules, lung reduction surgeries for the treatment of emphysema, bulectomies and, mainly, the cases in which an incomplete lung fissure was found. The importance of using the Pincers together with bovine pericardium, which could enhance suture line protection, is stressed. Material and methods: A retrospective overview of all cases of surgeries carried out with the new Pincers, between December 1998 and September 2001, was made. There were a total of 54 patients from the Monte Sinai and HU-UFJF hospitals. Results: The patients consisted of thirty three men (61%) and twenty one women (39%). Their ages ranged from 6 to 79 years (average: 56,25). The Pincers were used in lung biopsies (50,877%), atypical segmentectomies for the resection of lung nodules (12,281%), lung reduction surgeries for the treatment of emphysema (22,807%), bulectomies (8,772%) and, mainly, the cases in which an incomplete lung fissure (there cases) was found. Conclusions: The new Aerostatic Pincers could significantly reduce surgical costs. Their use could also provide aerostatic improvements to Thoracic Surgery, which maym in turn, lead to more comfort for our patients and reduce the time they need to stay in hospital.


Subject(s)
Humans , Male , Female , Child , Adolescent , Adult , Middle Aged , Surgical Instruments , Surgical Staplers , Thoracic Surgery
10.
Pulmäo RJ ; 10(4): 8-13, 2001. ilus
Article in Portuguese | LILACS | ID: lil-764317

ABSTRACT

Introdução: O pneumotórax espontâneo catamenial é uma entidade clínica definida com a presença de ar no espaço pleural, durante as primeiras 48 a 72 horas após o início do fluxo menstrual. Ocorre, preferencialmente, no hemitórax direito, com maior incidência nas terceiras e quartas décadas de vida. Apesar de constituir uma entidade pouco conhecida pela literatura mundial, dada a raridade do quadro, acredita-se que possa estar relacionado à existência de pertuitos diafragmáticos associado ou não à presença de implantes de células endometriais na cavidade torácica. Objetivos: Fazer a revisão da literatura e relatar um caso de pneumotórax catamenial. Material e métodos: Apresentamos um caso de paciente de 28 anos, sexo feminino, admitida no Hospital Monte Sinai com quadro de dispnéia de instalação súbita, tosse persistente e dor no hemitórax direito do tipo pleurítica, irradiada para a região escapular homolateral. Era a quinta vez que apresentava essa sintomatologia. A radiografia do tórax foi realizada com objetivo de se confirmar a presença de pneumotórax. Posteriormente, a paciente foi submetida a videopleuroscopia, com inventário minuncioso do espaço pleural, incluindo a visualização do diafragma e de toda a pleura. Resultados: À videopleuroscopia detectaram-se vários pertuitos diafragmáticos. Enviado material para estudo anatomopatológico, pudemos descartar endometriose pleural. A terapêutica consistiu em pleurectomia, com o objetivo de prevenir novos episódios. Conclusão: Em função da raridade do caso, o pneumotórax catamenial tem seu diagnóstico após vários episódios. Nesse caso específico, o achado de orifícios diafragmáticos permitiu optar pelo tratamento cirúrgico. A paciente encontra-se assintomática.


Introduction: Catamenial pneumothorax is characterized by recurrent accumulation of air in the thoracic space appeared within 48 to 72 hours from the menstrual flow. In most cases, catamenial pneumothorax is right-sided, and most of the affected women are in the third to fourth decades of life. Although it is a rare entity of unknown etiology, there are some possible cause for pnemothorax catamenial have been proposed: 1) rupture of pulmonary bleb; 2) diaphragmatic fenestration; 3) thoracic endometriosis. Objectives: 1) To make a review of the literature about pneumothorax catamenial. 2) To present a case of pneumothorax catamenial caused by diaphragmatic fenestration. Methods: A 28-year-old woman suffered 5 episodes of right-sided pneumothorax, which appeared during menstruation. She had undergone thoracic radiography to confirm the diagnosis. Then she had undergone video-assisted thoracoscopy, with histological examination of diaphragm specimen. Results: We identified diaphragm defects of different extension. Endometriosis could not be found. The patient undergone pleurectomy to prevent further occurrences. Conclusion: Because of its rarity, the diagnosis of catamenial pneumothorax could be difficult. In this present case the patient is assymptomatic before thoracocirurgical intervention, without using anovulatory therapy.


Subject(s)
Humans , Female , Adult , Endometriosis , Peritoneal Stomata , Pneumothorax
11.
HU rev ; 25/26(3/1): 156-60, set. 1999-abr. 2000. graf
Article in Portuguese | LILACS | ID: lil-296287

ABSTRACT

Introduçäo: Diferentes tipos de massa podem se implantar em cada um dos compartimentos do mediastino, sendo convencional que elas sejam classificadas conforme a localizaçäo anatômica. Tais massas podem ter origem congênita, traumática, infecciosa, degenerativa ou neoplásica. O conhecimento da clínica, do sexo e da idade do paciente, bem como da localizaçäo e das características radiológicas da massa, é fundamental no manuseio das lesöes, uma vez que säo estes os fatores que definiräo o diagnóstico e a propedêutica a ser adotada. No estudo das massas mediastinais, a Radiografia de tórax é muito importante. A Tomografia Computadorizada de tórax e a Ressonância Nuclear Magnética devem ser utilizadas, bem como a Cintilografia pelo I131, para casos específicos. Procuramos dar ênfase ao tratamento cirúrgico para as lesöes ressecáveis. O tratamento quimio/radioterápico foi utilizado também para os casos em que näo foi possível a ressecçäo da massa e para os linfomas...


Subject(s)
Humans , Male , Female , Mediastinal Neoplasms/diagnosis , Brazil , Mediastinal Neoplasms/radiotherapy , Mediastinal Neoplasms/surgery , Retrospective Studies , Tomography, X-Ray Computed
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