Navegando por Palavras-chave "Pericardium"
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- ItemAcesso aberto (Open Access)Arterioplastia com enxerto de pericárdio bovino: estudo experimental em cães(Sociedade Brasileira para o Desenvolvimento da Pesquisa em Cirurgia, 1997-06-01) Costa, Regina de Faria Bittencourt da [UNIFESP]; Nigro, Amaury José Teixeira [UNIFESP]; Vieira, Wilma Therezinha Trench; Universidade Federal de São Paulo (UNIFESP); Universidade de São Paulo (USP)The aim of this work was to evaluate the efficacy of bovine pericardium (BP) patch graft to treat arterial defects created in the femoral artery of dogs, compared to the cephalic vein autograft (CVA) on both side of the arteries. Twenty mongrel dogs (eight males and twelve females), were used and disbuted in two groups of ten animals (I and II), to be re-operated on 7th and 30th post operative days, respstively. Clinical and histolgical data analysis were done using the chi-square an exact Fisher test (a£ 0,05). Significant alterations wasn't found in the clinical examinations, independetly, of the kin of graft used and post operative observation period. It wasn't found any significant difference between the BP and CVA grafts in the histological analyses concerning the presence of inflammatory cell infiltration and mural thrombi that predominated on the 7th post operative day. Whilst, the presence of granulation tisseu, myofibroblastic plaque and endothelization predominated on the 30th post operative day. The presence of necrosis was found significant for both BP and CVA, on the 7th post operative day, being higher for BP. Calcification of the grafts was not observed. A significant reaction of strange body kind to the polypropylene yarn take place on the 30th PO for both grafts. These results sugested that BP was efficient as artery substitute for dogs, which was comparable to CVA, for the settled period of observation.
- ItemAcesso aberto (Open Access)Drenagem pericárdica videotoracoscópica no tratamento dos derrames pericárdicos(Sociedade Brasileira de Cirurgia Cardiovascular, 2009-03-01) Fonseca, José Honório de Almeida Palma da [UNIFESP]; Gaia, Diego Felipe [UNIFESP]; Guilhen, José Cícero Stocco [UNIFESP]; Branco, João Nelson Rodrigues [UNIFESP]; Buffolo, Enio [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)OBJECTIVES: To assess efficacy and safety of videothoracoscopic pericardial drainage in the treatment and diagnostic of pericardial effusion through 26 cases review. METHODS: From April 2005 to December 2007, 26 patients with pericardial effusion underwent a video-thoracoscopic pericardial window. Median age was 48.2 years old. Dyspnea was the most frequent symptom followed by thoracic pain. The procedure was performed in lateral decubitus, under general anesthesia and selective intubation with the aid of three trocars. RESULTS: Procedure accomplish was feasible in 25 cases. One conversion occurred. In 61.53% of the cases the procedure was able to modify the initial diagnosis. Microbiology and tissue culture were negative in all cases. Neoplasia was present in nine cases, tuberculosis in two, aspergillosis in one, postoperative heart surgeries in three; lupus in two, uremia in one and idiopathy in eight. Associated pleuropulmonary procedures were performed in four cases. No deaths related to the procedure occurred. One late recurrence was recorded. CONCLUSION: The procedure is feasible, safe, reproducible and allowed an etiologic diagnostic. Specific treatment could be initiated in some cases. The intervention could possibly be the new gold standard treatment of pericardial effusion in selected patients.
- ItemAcesso aberto (Open Access)Experimental lamellar corneal graft in dogs using preserved equine pericardium(Faculdade de Medicina Veterinária e Zootecnia / Universidade de São Paulo, 1999-01-01) Barros, Paulo Sergio De Moraes; Safatle, Angélica Mendonça De Vaz; Rigueiro, Moacyr Pezati [UNIFESP]; Universidade de São Paulo (USP); Universidade Federal de São Paulo (UNIFESP)The purpose of this paper was to study the preserved equine pericardium as a corneal lamellar graft of the dog. We performed in twelve adults, male and female mongrel dogs a superficial keratotomy 5 mm square and a fragment of equine pericardium of the same shape was sutured in place with multiple 7-0 nylon simple interrupted sutures. Each five animals were sacrificed in days 7, 15, 30 and 100 after surgery. The clinical and histological exams permitted us to assert that this membrane is a useful tissue to be used as a corneal lamellar graft of the dog.
- ItemAcesso aberto (Open Access)Massagem cardíaca interna em cães: proposição de nova técnica para pericardiotomia de emergência tração - ligamentar(Sociedade Brasileira para o Desenvolvimento da Pesquisa em Cirurgia, 2005-04-01) Aguiar, Eduardo Santiago Ventura De; Raiser, Alceu Gaspar; Schossler, João Eduardo Wallau [UNIFESP]; Oliveira, Ana Néri Christo De; Weiss, Marcelo; Sampaio, Diego Goulart; Pigatto, Juliana; Demori, Gustavo; Caríssimi, André Silva; Universidade Federal de Santa Maria; Universidade Federal de São Paulo (UNIFESP); SOBRADIPEC; Universidade de São Paulo (USP)PURPOSE: Describe a technique of emergency pericardiotomy, named as Ligament Traction (LT), to reduce the necessary time to begin the Internal Cardiac Massage. To perform the ICM an emergency toracotomy and pericardiotomy are necessary, both in remote time. The technique usually employed is the T pericardiotomy, whose execution depends on the apprehension of the pericardium with an Allis forceps. This apprehension is difficult and complicates the reanimation of the patient METHODS: Twenty canine corpses were divided into two groups: Group I - T pericardiotomy (n=10), and Group II - the LT technique (n=10). The LT consisted on the traction of the pericardiumphrenic ligament and the section of the pericardium next to its apex. The incision was elongated with the introduction of the fingers, also allowing the positioning of the heart in the hand of the operator and the immediate beginning of the ICM. RESULTS: Group I presented an execution period of 21.79 ± 0.88 second, and Group II of 8.58 ± 1.38, with p<0.0001 (highly expressive). CONCLUSION: The technique of pericardiotomy by Ligament Traction concur to outliving, because it avoids a larger time of cerebral ischemia, due to the early beginning of the circulation.
- ItemAcesso aberto (Open Access)Pericárdio bovino utilizado como remendo no sistema cardiovascular(Sociedade Brasileira de Cirurgia Cardiovascular, 1997-04-01) Pires, Adilson Casemiro [UNIFESP]; Saporito, Wladimir Faustino [UNIFESP]; Leao, Luiz Eduardo Villaca [UNIFESP]; Forte, Vicente [UNIFESP]; Cardoso, Sigmar Horst [UNIFESP]; Ramaciotti, Osiris [UNIFESP]; Faculdade de Medicina do ABC; Universidade Federal de São Paulo (UNIFESP)The bovine pericardium, preserved into glutaraldehyde, in making valvar phostheses, is well known. Although largely used in the form of scrap, this was little studied. With this intention, 21 dogs were submitted to surgical patch of a standardized bovine pericardium scrap partially substituting, the aorta left atrium and pericardial walls. The dogs were randomly separated in three groups according to the reoperation time. Group 1 with 6 reoperated dogs between 33 and 43 days; group 2 with 7 reoperated dogs between 120 and 165 days and group 3 with 8 reoperated dogs between 225 and 305 days. The micro and macroscopic examinations showed: (1) the wrinkled surface of the scrap adhered to the neighboring structures, while the smooth surface implanted on pericardium adhered a little to epicardium; (2) the bovine pericardium scrap did not suffered structural change, independently of the implant location; (3) the final area of the left atrial patch was significantly smaller than the aortic and pericardial patches, to the dogs of groups 2 and 3; (4) the atrial patch area diminished significantly, while the aortic and pericardial have not been changed with time; (5) the pericardial scrap thickness was significantly smaller than the left atrium and aortic ones, in the dogs of group 3; (6) the formation of a fibrous connective tissue layer occurred on the smooth surface of the scraps implanted on the left atrium and aorta. The internal apposition tissue thickness was significantly greater on left atrium than on the aorta, in groups 1 and 2; (7) the internal apposition tissue of the atrial and aortic patches underwent calcification in dogs of groups 2 and 3; (8) the internal apposition tissue of atrial and aortic patches showed neoformation of elastic fibers that increased sharply as the implant time passed by. With this finding, we can conclude that the behavior of the bovine pericardium preserved into glutaraldehyde, as a scrap, for making a patch, in vascular surgery, depends on: (1) the contact surface; (2) the tension to which it is submitted; (3) the contact with the circulation.
- ItemAcesso aberto (Open Access)Porcine pericardium as glaucoma implant tube coverage: an experimental study(Conselho Brasileiro de Oftalmologia, 2008-10-01) Pinto, Luciano Moreira [UNIFESP]; Regatieri, Caio Vinicius Saito [UNIFESP]; Tavares, Ivan Maynart [UNIFESP]; Rigueiro, Moacyr Pezati [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)PURPOSE: To evaluate the inflammatory response associated with the use of processed porcine pericardium and glycerin-preserved homologous sclera as silicone glaucoma drainage device coverage in a rabbit experimental model. METHODS: Eight New Zealand white rabbits' eyes received an equal-sized glycerin-preserved homologous scleral patch or a double-layered processed porcine pericardium that was sutured to the bare sclera covering a silicone tube. Conjunctival hyperemia was graded using the double-blind method during the immediate postoperative period and during the first, third, and seventh postoperative weeks. After the seventh week, the enucleated eyes were histopathologically examined. They were also evaluated for signs of patch graft melting, tube erosion and chemosis. RESULTS: There was no occurrence of graft melting or tube exposure, although porcine pericardium was associated with greater inflammation through clinical observation. Light microscopy revealed marked inflammation surrounding the porcine pericardium with foreign body granuloma formation. On the other hand, the sclera group presented milder inflammation with foreign body granulomas only around the sutures. CONCLUSIONS: Porcine pericardium is associated with significant inflammation when used as tube coverage in a rabbit model, at both histopathologic and clinical levels, when compared to glycerin-preserved homologous sclera during the seven-week follow-up period.