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Search Results: 1 - 10 of 5213 matches for " Surgical mesh "
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Peritoneostomy with latex coated polypropylene: experimental study in rats
Claudio, Renato Hugues Atique;Diogo Filho, Augusto;Mamede Filho, Divino Oliveira;
Acta Cirurgica Brasileira , 2006, DOI: 10.1590/S0102-86502006000600009
Abstract: purpose: to evaluate if latex coated polypropylene mesh leads to less adhesions formation. methods: 90 rats were distributed in three groups. group i (control) was submitted to median laparotomy and posterior synthesis; group ii (polypropylene) was submitted to a segment resection of the abdominal wall, and the defect was corrected with a polypropylene mesh; group iii using the new material (latex coated polypropylene). after 45 days the euthanasia procedure was done and the adhesions were evaluated in 2 ways: 1) classification in a grading system; 2) evaluation of the adhesion area, which was calculated by resection of the adhesions after dying with indian blue ink. results: the classification in a grading system showed that group iii animals had less adhesions formation (p<0.05), but the evaluation of the adhesion area did not show any difference (p>0.05). the severe complications (fistula, evisceration and obstruction), which were lethal, were not reduced by the latex coated material. conclusion: latex coated polypropylene causes fewer adhesion formations than polypropylene alone, although it does not diminish the severe early complications.
Tela de polipropileno: estudo do efeito de esteriliza??o na estrutura em fragmentos de tela para reutiliza??o em cirurgia de hérnia
Gil, Sidney Moreno;Polito, Wagner;Campos Júnior, Cláudio Penido;Gil, Bruno Ziade;Centurion, Leandro de Moura;Rodrigues, Luiz Fernando Dias;
Revista do Colégio Brasileiro de Cirurgi?es , 2005, DOI: 10.1590/S0100-69912005000400006
Abstract: background: our objective is to study the effects of multiples formaldehyde sterilizations at low temperature in the molecular structure (physical-chemical) as well as on microorganism growth in a polypropylene mesh used for the surgical correction of different hernias of the abdominal wall. methods: we used an even mesh (ethicon) standard 15cm x 15cm, cutted into small 2cm x 1cm pieces after multiples sterilizations. they were named samples a (control), a1 (one sterilization), a3 (three sterilizations) and b (control), b1 (one sterilization) b2 (two sterilizations), b3 (three sterilizations), b4 (four sterilizations), b5 (five sterilizations).the meshes a were analysed by spectroscopy in infrared (ftir) and microscopy electronic by sweepings (mev), and meshes b were incubated within brain heart infusion (bhi), agar saboraud dextrose and agar chocolate (red sheep cells at 5%). results: the sample comparative analyses a, a1, a3, showed to be identical according to the composition including the same pattern of porosity. concerning samples b (1, 2, 3, 4 and 5) no microorganism was found on the parts under up to five sterilizations. conclusions: the polypropylene mesh is not altered as a molecular structure, and it can be sterilized up to five times with no chance for microorganisms on the samples.
Avalia??o da hernioplastia protética atensional no tratamento das hérnias inguinais
Strassmann, Victor;Santoro, Sérgio;Malzoni, Carlos Eduardo;Velhote, Manoel Carlos Prieto;Macedo, Maurício;Posso, Irimar de Paula;
Revista do Colégio Brasileiro de Cirurgi?es , 1998, DOI: 10.1590/S0100-69911998000300002
Abstract: this is the inicial experience in brazil with the routine use of prosthetic tensionless repair of common inguinal hernias. before that many groups had been using prosthetic material in selected cases, mostly recurrences. seventy six patients were operated on, 12 of them bilaterally so that there were 88 procedures over direct (26,1%), indirect (56,8%) and both direct and indirect hernias (17,1 %). the hernia sacs are reduced to the abdominal cavity and the abdominal wall is reinforced by the placement of a polipropilen mesh on the transversalis fascia. the technique is detailed described. only minimal pain occurred in the postoperative period. there were no infeccion, no rejection, and until now (30 months of medium follow up), no signs of recurrences. many aspects of the surgical treatment of inguinal hernias are discussed including results, feseability, risks and costs. it is concluded that prosthetic tensionless repair of inguinal hernias is easy, fast, safe and cheap. it does not require general anaesthesia neither complex material. it has excellent results and as it does not create tension sutures, it causes less pain and allows normal physical activity very soon. it suggests that, in common inguinal hernias, maybe we can spare the patient and community from the higher costs of laparoscopic surgery since we can obtain excellent results with an easier and cheaper method.
The role of bovine preserved peritoneum in rats ventral hernia: a histological evaluation
Bastos, Eduardo Lemos de Souza;Fagundes, Djalma José;Taha, Murched Omar;Novo, Neil Ferreira;Juliano, Yara;Sim?es, Manuel de Jesus;Silvado, Rubens Augusto Brazil;
Acta Cirurgica Brasileira , 2006, DOI: 10.1590/S0102-86502006000500010
Abstract: purpose: to assess the role of preserved bovine parietal peritoneum as a material for hernia repair in a rat ventral hernia model. methods: an abdominal wall defect (15mm x 25mm) was created in wistar male rats (n=40). control animals (n=20) had the polypropylene (pp) mesh sutured into the defect, whereas bovine preserved peritoneum (bpp) was used in experimental group (n=20). after 7 and 28 days, the abdominal wall was taken off and histological studies of the amount of collagen by sirius red stain and morphometric evaluation consisted in quantitative analysis of the collagen by using specific software (imagelab?). the mann-whitney, kruskal-wallis and anova tests were applied for statistical analysis (pd"0.05). results: histological examination revealed no difference between the bpp and pp groups (p = 0.55 ns). conclusion: bpp is suitable for the closure of ventral hernias in rat model as shown by its morphological properties.
Evaluation of healing prosthetic materials polyester mesh resorbable film and collagen elastin matrix /polypropylene used in rabbits abdominal wall defects
Schulz, Danielle Duck;Czeczko, Nicolau Gregori;Malafaia, Osvado;Schulz, Gustavo Justo;Czeczko, Leticia Elizabeth A.;Garcia, Larissa Santin;Dietz, Ulrich Andreas;
Acta Cirurgica Brasileira , 2009, DOI: 10.1590/S0102-86502009000600010
Abstract: purpose: to compare polyester with absorbable layer prosthesis with collagen-elastin/polypropylene prosthesis in the repair of abdominal wall defects. methods: the 16 studied rabbits were divided in groups a and b (euthanized on the 30th and 60th days, after the implant of the mesh). the animals underwent laparotomy and received a 2cm wall "defect" on each side of the alba linea. the repair was made with the suture of a polyester mesh with absorbable film on the left side of the alba linea and with collagen-elastin/polypropylene mesh on the right side. adherences were classified according to nair score and microscopic evaluation observing types i and iii collagen formation and other immunohistochemical analyses. results: there were no significant differences in adhesion formation. the collagen type i showed higher deposition in polyester with absorbable layer. in group b, the difference between the meshes was significant, with higher collagen iii deposition in polyester with absorbable layer (60o p.o.). about the metalloproteinases, the presence of mmp -1 and mmp-8 were about the same; the expression of mmp-13 increased near to the 60th day. conclusions: there is no significant difference between the two meshes in adhesion formation and immunohystochemical evaluation. the polyester mesh resorbable film presented a higher deposition of collagen.
Prospective study on the effects of a polypropylene prosthesis on testicular volume and arterial flow in patients undergoing surgical correction for inguinal hernia
Lima Neto, Edgar Valente de;Goldenberg, Alberto;Jucá, Mário Jorge;
Acta Cirurgica Brasileira , 2007, DOI: 10.1590/S0102-86502007000400007
Abstract: purpose: to evaluate testicular volume and arterial flow in patients undergoing surgical correction for inguinal hernia, with polypropylene prosthesis. methods: this was an observational prospective clinical study on 39 male patients with unilateral inguinal hernia of types iii a and iii b according to the nyhus classification who underwent surgical correction with implantation of a polypropylene prosthesis by means of the lichtenstein technique. the patients were evaluated using doppler ultrasound before the operation and selectively at the third and sixth months after the operation. the variables studied were testicular volume, systolic and diastolic velocity, resistance index and pulsatility index. results: no statistically significant alterations in the variables studied were observed over the course of time: testicular volume (p= 0.197); systolic velocity (p= 0.257); diastolic velocity (p= 0.554); resistance index (p= 0.998); and pulsatility index (p= 0.582). conclusion: no alteration in testicular volume and arterial flow over a six-month period was observed among patients who underwent surgical correction for inguinal hernia using a polypropylene prothesis.
FECHAMENTO DA PAREDE ABDOMINAL COM AFASTAMENTO PARCIAL DAS BORDAS DA APONEUROSE UTILIZANDO SOBREPOSI??O COM TELAS DE VICRYL OU MARLEX EM RATOS
Mazzini, Décio Luiz;Mantovani, Mario;
Acta Cirurgica Brasileira , 1999, DOI: 10.1590/S0102-86501999000100006
Abstract: the present experiment has as a purpose to study comparatively the effect of absorbable and unabsorbable mesh, as a reinforcement in the closing of the median abdominal incisions in rats, in the situation of the partial approximation of the borders of the aponeurosis. for this, 45 male rats of the wistar breed were studied, divided into three groups, in which the procedure was in the following manner. "control group": median abdominal incision reaching the peritoneal cavity followed only by the closing of the skin and subcutaneous celular. "vicryl group": median abdominal incision reaching the peritoneal cavity followed by a reinforcement with vicryl mesh, overlaid in the form of a bridge over the aponeurosis, maintaining the lips of the aponeurosis distant amid themselves by 1,0 cm. "marlex group": the procedure is identical to the "vicryl" group, substituting the vicryl mesh by the marlex mesh. after one year the animals were sacrificed and submitted to a microscopic valuation as to the presence of hernias and adherences to the meshes; checking the tension resistance of the surgical scar through the traction by dinamometer and histological study of the following phenomenons of the cicatrization; chronical inflamatory reaction, foreign body type granulomatosis inflamation, granulation tissue, fibroblastic hyperplasia and fibrosis. only animals of the "control group" developed hernias in the final experiment. there was no significative formation of intestinal adherences in any of the group studied. the tension resistence was significantly greater in the animals in which meshes were applied for reinforcement. the chronical inflamatory reaction and the foreing body type granulomatosis inflamation were much more intense in the group in which marlex was used, than in the other groups. as to the granulation tissue and fibroblastic hyperplasia,they were absent in all the groups. the fibrosis was more intense in the group in which the meshes were employed. its is concluded
The role of bovine preserved peritoneum in rats ventral hernia: a histological evaluation
Bastos Eduardo Lemos de Souza,Fagundes Djalma José,Taha Murched Omar,Novo Neil Ferreira
Acta Cirurgica Brasileira , 2006,
Abstract: PURPOSE: To assess the role of preserved bovine parietal peritoneum as a material for hernia repair in a rat ventral hernia model. METHODS: An abdominal wall defect (15mm x 25mm) was created in Wistar male rats (n=40). Control animals (n=20) had the polypropylene (PP) mesh sutured into the defect, whereas bovine preserved peritoneum (BPP) was used in experimental group (n=20). After 7 and 28 days, the abdominal wall was taken off and histological studies of the amount of collagen by Sirius Red stain and morphometric evaluation consisted in quantitative analysis of the collagen by using specific software (Imagelab ). The Mann-Whitney, Kruskal-Wallis and ANOVA tests were applied for statistical analysis (pd"0.05). RESULTS: Histological examination revealed no difference between the BPP and PP groups (p = 0.55 NS). CONCLUSION: BPP is suitable for the closure of ventral hernias in rat model as shown by its morphological properties.
Fibroelastoma valvular aórtico como causa de accidente cerebrovascular embólico: Reporte de un caso
BAHAMONDES S,JUAN CARLOS; MERI?O S,GUSTAVO; SALMAN A,JUAN; SILVA V,ABELARDO; MORA M,JAVIER;
Revista chilena de cirugía , 2008, DOI: 10.4067/S0718-40262008000500015
Abstract: background: cardiac tumors are an infrequent cause of an embolic source and aortic fibroelastoma is even more rare as causative of a stroke. we report a 65 year oíd female with no particular clinical history admitted to the hospital with an embolic cerebrovascular accident whose embolic source study with a transesophageal echocardiogram revealed a fibroelastoma in the free edge of the non coronarían leaflet of the aortic valve. the patient was subjected to surgery by means of extracorporeal circulation and the tumor was excised. the pathological study confirmed the diagnosis. post operative recovery was uneventful with no neurological damage and after 19 months of follow up she is in functional class i.
Estudo das telas cirúrgicas de polipropileno/poliglecaprone e de polipropileno/polidioxanona/celulose oxidada regenerada na cicatriza??o de defeito produzido na parede abdominal de ratos
Pundek, Marcia Regina Zanello;Czeczko, Nicolau Gregori;Yamamoto, Célia Toshie;Pizzatto, Raul Fernando;Czeczko, Leticia Elizabeth Augustin;Dietz, Ulrich Andreas;Malafaia, Osvaldo;
ABCD. Arquivos Brasileiros de Cirurgia Digestiva (S?o Paulo) , 2010, DOI: 10.1590/S0102-67202010000200007
Abstract: background: the use of surgical meshes for the repair of abdominal wall defects has been increasing its share in surgeries worldwide. aim: to study two different surgical meshes (proceed? and ultrapro?) on the healing of defects produced in abdominal wall of rats evaluating the macroscopic, microscopic and tensiometric parameters. method: thirty two wistar rats were divided into two groups of 16 animals and four groups of eight animals euthanized within 15 and 30 days for evaluation. the macroscopic variables were: the presence of hematoma at the edges of the sutures of the surgical mesh in the abdominal wall; the knitting of the surgical mesh and the edge of the wound; presence of infection at the surgical site; presence of viscera fistulas on the surgical mesh; presence of adhesions in the abdominal cavity; presence of incisional hernia. during microscopy the stages of the inflammatory process of healing where evaluated, and tensiometry evaluated the tensile force required to rupture the material. results: the knitting of the mesh and the edge of the surgical wound was better in the 15 days ultrapro subgroup than in the 15 days proceed subgroup; within 30 days the knitting was similar in both subgroups. there was no significant difference for the variable of macroscopy. both groups in both periods had the same proportion of cases with chronic inflammation, but there were higher scores of inflammation in the 15 days ultrapro subgroup than the 30 days ultrapro subgroup. the subgroup 15 days ultrapro showed greater rupture strength than the subgroup 15 days proceed, but in 30 days there were no difference. ultrapro showed equal rupture strength in both periods, but 30 days proceed showed greater rupture strength than 15 days proceed. conclusion: the meshes are similar in variables.
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