Biomedical subjects
A L da Silva
Publications and source records attributed to A L da Silva.
Lower eyelid repair utilising triangular skin flaps with subcutaneous pedicles.
Fifty-four patients were studied during the period from 1984 to 1989. The lower eyelid was repaired in 55 cases utilising a triangular flap with a subcutaneous pedicle. Repair was achieved in 39 cases with a triangular flap only and in 16 it was necessary to use a chondromucosal graft of nasal septum as well. The method is described and is feasible for repairs ranging from the simplest to the most complex in different locations of the lid.
Incisional hernias: factors influencing development.
We have presented a study of 125 patients treated for incisional hernia. This complication occurred more frequently in women (81%), and gynecologic and obstetric procedures were responsible for 58%. The method of surgical repair in all cases was peritoneal-aponeurotic transposition. The 5-year recurrence rate was less than 3%.
Surgical proposition for the treatment of omphalocele.
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Immune responses during human schistosomiasis mansoni. XIII. Immunological status of spleen cells from hospital patients with hepatosplenic disease.
Splenocytes from 25 patients with severe hepatosplenic schistosomiasis mansoni were obtained after therapeutic splenectomy. Spleen cells were phenotyped and analysed for responsiveness to mitogens or heterogeneous schistosome-derived antigenic preparations (eggs, SEA; adult worms, SWAP; cercariae, CERC) in blastogenesis assays and lymphokine production systems, and were compared with peripheral blood mononuclear cells (PBMN). Splenic lymphocytes were 55% T lymphocytes (sheep erythrocyte rosette-positive) and 37% surface immunoglobulin-positive B lymphocytes. The mean T4+:T8+ ratio of these splenocytes was 1.0. Phytohaemagglutinin stimulated spleen cell production of the lymphokine mitogenic factor, but exposure to SEA or SWAP did not. Spleen cell and PBMN blastogenic responses to SEA and SWAP were sometimes, but not always in accord. Removal of plastic adherent cells allowed the non-adherent spleen cells of 30-40% of the patients to respond substantially more vigorously to SEA, SWAP and CERC. Spleen cells from a subgroup of 20-30% of the patients failed to respond to the schistosomal antigens regardless of removal of adherent cells. Spleen cell responses to gram-negative lipopolysaccharide peaked on day 5 or 6 of culture, and were augmented by adherent cell removal. Pokeweek mitogen-stimulated responses were optimal on day 5 of culture. Spleen cells from most severe, hepatosplenic schistosomiasis mansoni patients do not respond well to schistosomal antigens or B-cell mitogens. The splenic responses of many of these patients were elevated by the removal of adherent spleen cells.
[The Revista Gaúcha de Enfermagem--a quantitative study].
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Immune responses during human schistosomiasis mansoni. IX. T-lymphocyte subset analysis by monoclonal antibodies in hepatosplenic disease.
T lymphocyte immunoregulatory subsets (T4+ and T8+ cells) have been analysed in eight cases of hepatosplenic schistosomiasis mansoni, and compared to parallel analyses of seven intestinal Schistosoma mansoni-infected patients and four uninfected control subjects. The mean T4+:T8+ ratio in hepatosplenic cases was markedly less than observed in other groups (0.94 vs 1.86 vs 2.22, respectively). Proliferative responses stimulated by a soluble adult worm extract correlated directly with the observed T4:T8 ratios. Normal levels of E rosette-positive and surface immunoglobulin-bearing lymphoid cells were observed in intestinal patients, while hepatosplenic patients demonstrated normal B lymphocyte proportions but highly erratic E rosette-positive percentages. Curiously, in hepatosplenic patients the percentage of E rosette-positive cells often did not correlate with the proportion of T3+ cells.
[Giant Abrikosov's tumor located in the abdominal wall. Surgical treatment].
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[Bilateral peritoneo-aponeurotic superposition with the hernial sac of median and paramedian longitudinal incisional hernias].
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[Inferior cavography in portal hypertension syndrome due to hepatosplenic schistosomiasis mansoni].
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Surgical correction of longitudinal median or paramedian incisional hernia.
A new surgical technique for the correction of longitudinal median and paramedian incisional hernia uses the hernial sac itself, a tissue of good resistance and healing properties, to cover raw areas, remake the abdominal wall anatomy, propitiate tensionless sutures and render unnecessary the use of prosthetic material, even in the largest hernia.
[Choledochoduodenal fistula secondary to peptic ulcer].
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[Experimental study on the spontaneous movements of stomach fragments in the dog].
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Use of acrylic of low polymerization after heminandibulectomy.
Two cases of mandibular reconstruction are presented in which a premolded prosthesis of acrylic of low polymerization covered by silicone rubber was used. We believe that the good results obtained were not only due to the material used, but also because the periosteum and meniscus were preserved in the joint space.
[Mesenchymoma of the liver in children. 6.5 years survival after surgery].
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[Per and postoperative complications after vagotomy, antrectomy plus gastroduodenostomy in the small curvature (V.A.G.D.P.C)].
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