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Search Results: 1 - 10 of 14098 matches for " Leite Henrique Vitor "
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Tratamento das uropatias obstrutivas fetais: experiência com novo cateter
Lopes, Ana Paula B.M.;Cabral, Ant?nio Carlos V.;Leite, Henrique Vitor;
Revista Brasileira de Ginecologia e Obstetrícia , 1998, DOI: 10.1590/S0100-72031998000300006
Abstract: management of prenatally diagnosed uropathies is controversial, mainly because the prognosis for these fetuses is quite different. however pioneering studies have shown that prenatal drainage of obstructed urinary tract can improve the outcome of selected fetuses. the aim of this study is to describe the experience of the service with the treatment of fetal obstrutive uropathy with the catheter developed by the centro de medicina fetal do hospital das clínicas da ufmg. a total of 25 fetuses with obstructive uropathy received the catheter. three fetuses required more than one insertion. ten of 25 (40%) shunted fetuses survived with good postnatal renal and pulmonary function. complications occurred in 12/25 (48%) cases including: 06/25 (24%) inadequate shunt drainage or migration; 01/25 (04%) urinary ascitis; 01/25 (04%) dpp, 01/25 (04%) premature rupture of membranes, 02/25 (08%) premature labor, 01/25 (04%) scarring and fibrosis of the renal parenchyma. three of 25 (12%) fetuses died intra-utero and 12 (48%) died during the neonatal period. in conclusion, the drainage of the obstructed urinary tract with this catheter proved to be technically feasible and safe for both mother and fetus, with a survival rate of 40%.
Morbidade associada a cesariana eletiva em portadoras do HIV
Rocco, Regina;Leite, Henrique Vitor;Vasconcellos, Marcus;Cabral, Antonio Carlos Vieira;
Revista Brasileira de Ginecologia e Obstetrícia , 2003, DOI: 10.1590/S0100-72032003000500004
Abstract: purpose: to determine whether an elective cesarean section at the 38th week of gestation for hiv positive patients, in spite of decreasing vertical transmission, increases the risk of maternal death. methods: fifty-eight hiv-infected patients were studied and submitted to the complete actg 076 protocol (oral administration of zidovudine in the prenatal period associated with the intravenous form at delivery) followed by an elective cesarean section at the 38th week of gestation. the control group consisted of 226 noninfected women (the first four patients submitted to an elective cesarian section after each cesarian section in infected patient). the analyzed variables were: uterine atonia, puerperal fever, abdominal wall infection, urinary infection, endometritis, average blood loss, surgery time, and hospitalization time. data were analyzed by the c2 test (the fisher test was used when there were less than 5 cases). the relative risk was calculated with the epi-info 6.0 program. results: results show that the elective cesarean section performed on hiv-positive patients, when compared to the control group, did not present a higher incidence of uterine atonia, puerperal fever, abdominal wall infection, urinary infection or endometritis. however, a greater average blood loss (2.26 relative risk) was recorded as well as an extended surgery time (3.32 relative risk). the hiv-infected patients remained less time in hospital than the noninfected control group (0.33 relative risk). conclusion: we conclude that there was no increase in maternal morbidity after cesarean section as a means of interrupting gestation in the hiv-infected patients.
Fluxo no ducto venoso e na veia cava inferior dos fetos em gesta??es isoimunizadas
Lage, Eura Martins;Cabral, Ant?nio Carlos Vieira;Leite, Henrique Vitor;
Revista da Associa??o Médica Brasileira , 2006, DOI: 10.1590/S0104-42302006000500020
Abstract: objective: ductus venosus and inferior vena cava flow velocity was assessed in fetuses in isoimmunized pregnancies. methods: examination of 61 fetuses aged 27 to 35 weeks from rh-erythrocyte antigen isoimmunized women was carried out from june 1999 to june 2004. all fetuses were submitted to the examination of ductus venosus and inferior vena cava flow velocity. blood samples were collected to determine hemoglobin values and hemoglobin concentration deficits. accordingly, fetuses were grouped as follows: non-anemic; mildly anemic; moderately anemic and severely anemic fetuses. comparison of the variation of average flow velocity in the inferior vena cava and ductus venosus across the four groups was carried out using the chi-square test. results: inferior vena cava flow velocity was found to be altered in 3.8% of non-anemic fetuses; in 3.1% of the mildly anemic, in 40.0% of those moderately anemic; and in 76.0% of the severely anemic ones. alteration in ductus venosus flow velocity, in turn, was identified in 7.7% of non-anemic fetuses; 3.1% of mildly anemic; 32.5% of moderately anemic and 68.0% of those severely anemic. results were statistically significant with p < 0.001. conclusion: the study shows that alteration of flow velocity in the inferior vena cava and ductus venosus increased with the severity of anemia.
Morbidade associada a cesariana eletiva em portadoras do HIV
Rocco Regina,Leite Henrique Vitor,Vasconcellos Marcus,Cabral Antonio Carlos Vieira
Revista Brasileira de Ginecologia e Obstetrícia , 2003,
Abstract: OBJETIVO: determinar se a cesariana eletiva na 38a semana de gesta o para pacientes portadoras do vírus HIV, com a finalidade de reduzir a transmiss o vertical, aumenta a morbiletalidade materna. MéTODOS: foram incluídas 58 pacientes portadoras do vírus submetidas ao protocolo ACTG 076 completo (associa o da zidovudina oral no pré-natal com a forma venosa no momento do parto), que foram submetidas a cesariana eletiva na 38a semana de gravidez. O grupo controle constituiu-se de 226 grávidas n o infectadas (as quatro pacientes submetidas a cesariana eletiva após cada cesariana em paciente portadora do HIV). As variáveis analisadas nos dois grupos foram: atonia uterina, febre puerperal, infec es de parede abdominal, infec es urinárias, endometrite, perda sangüínea, tempo operatório e tempo de interna o. A análise estatística foi feita com o teste do c2 (teste de Fisher quando havia caselas com menos de 5 casos). O risco relativo (RR) foi calculado com o programa Epi-Info 6.0. RESULTADOS: os resultados mostram que a cesariana eletiva realizada em pacientes portadoras do HIV, quando comparada com o grupo controle, n o apresentou maior incidência de atonia uterina (p=1,6), de febre puerperal (p=0,6), de infec es de parede abdominal (p=0,6), de infec es urinárias (p=0,2) e de endometrite (p=0,3). No entanto, houve maior perda sangüínea (risco relativo de 2,2), e maior tempo operatório (risco relativo de 3,3). A paciente portadora do HIV permaneceu menos tempo internada que aquela do grupo controle (risco relativo de 0,3). CONCLUS O: conclui-se que n o houve aumento da morbidade materna ao se optar pela cesariana como desfecho da gesta o da paciente portadora do vírus HIV.
Press o arterial e concentra o plasmática do peptídeo atrial natriurético e do peptídeo natriurético tipo B, em gesta es complicadas pela pré-eclampsia
Reis Zilma Silveira Nogueira,Cabral Ant?nio Carlos Vieira,Barra Juliana Silva,Leite Henrique Vitor
Revista Brasileira de Ginecologia e Obstetrícia , 2003,
Abstract: OBJETIVO: o estudo busca determinar a existência de associa o entre a eleva o da press o arterial e os níveis plasmáticos dos peptídeos natriuréticos ANP e BNP, na gesta o complicada pela pré-eclampsia. MéTODOS: em estudo transversal caso-controle, pareado por idade gestacional, 25 grávidas normotensas e 61 portadoras de pré-eclampsia foram avaliadas quanto ao nível da press o arterial e às concentra es plasmáticas dos peptídeos natriuréticos ANP e BNP. Exames clínico e laboratoriais foram realizados para o diagnóstico de pré-eclampsia, sendo a press o arterial medida de forma n o invasiva. As dosagens hormonais foram obtidas por radioimunoensaio, após extra o em colunas Sep-pak C18. Os valores médios das concentra es plasmáticas do ANP e BNP foram comparados entre grupos com press o arterial progressivamente maiores. A correla o entre os valores da press o arterial e os níveis plasmáticos do ANP e BNP no sangue materno foi também investigada pela de análise de regress o no grupo completo de gestantes e em grupos específicos excluindo-se a hipertens o anterior à gesta o e, em seguida, excluindo-se aquelas sem hipertens o prévia. RESULTADOS: os valores plasmáticos de ANP foram 41.5±7.3, 78.4±13.1 e 89.2±13.4 pg/mL (p<0,00001) e os de BNP plasmático foram 79.5±15.8, 176.7±42.2 e 208.3±63.5 pg/mL (p=0,005), respectivamente, para os grupos de press o arterial média =107 mmHg, 107-139 mmHg e =140 mmHg. Verificou-se correla o positiva entre as concentra es plasmáticas do ANP e os níveis pressóricos na pré-eclampsia, independente da existência de estado hipertensivo prévio à gesta o (p<0,0001 para pré-eclampsia e p<0,01 para pré-eclampsia sobreposta à hipertens o arterial cr nica), ao passo que as dosagens de BNP n o se mostraram associadas à press o arterial no grupo com hipertens o arterial prévia à gesta o (p=0,004 para pré-eclampsia e p=0,18 para pré-eclampsia sobreposta à hipertens o arterial cr nica). CONCLUS O: o agravamento da hipertens o na pré-eclampsia correlacionou-se com as concentra es séricas do ANP e BNP, embora os valores do BNP possam ser influenciados pela existência de estado hipertensivo prévio.
Cariótipo Fetal em Líquido Pleural Obtido por Toracocentese
Cabral Antonio Carlos Vieira,Machado Isabela Nelly,Leite Henrique Vitor,Pereira Alamanda Kfoury
Revista Brasileira de Ginecologia e Obstetrícia , 2001,
Abstract: Objetivos: avaliar a efetividade da realiza o de cariótipo em líquido pleural obtido por toracocentese de um grupo de fetos portadores de derrame pleural. Métodos: foram avaliados 15 fetos com derrame pleural uni ou bilateral nos quais se realizou uma pun o da cavidade torácica. A idade gestacional variou entre 19 e 34 semanas. Os fetos foram estudados com ultra-sonografia morfológica para determinar a presen a de anomalias associadas. Nos casos em que n o se obteve o cultivo em líquido pleural foi realizada cordocentese para a realiza o do cariótipo. O líquido pleural obtido foi enviado para cultura de linfócitos e cariótipo, sendo a técnica de cultivo semelhante à realizada com sangue. Resultados: dos 15 casos estudados foi obtido cariótipo em 12, e destes, em quatro se encontrou a trissomia do cromossomo 21 e os outros 8 foram normais. Em todos os casos, normais ou alterados, o cariótipo foi confirmado no sangue dos recém-nascidos e por meio do exame neonatal ou da necropsia. N o ocorreram complica es maternas ou fetais relacionadas ao procedimento invasivo. Conclus es: o cariótipo em líquido pleural obtido por toracocentese mostrou ser procedimento eficaz e seguro, devendo ser empregado nos casos de fetos com derrame pleural.
Análise de imagens na avalia??o de danos mecanicos em sementes de soja
Pinto, Taís Leite Ferreira;Mondo, Vitor Henrique Vaz;Gomes-Júnior, Francisco Guilhien;Cicero, Silvio Moure;
Pesquisa Agropecuária Tropical , 2012, DOI: 10.1590/S1983-40632012000300010
Abstract: mechanical damage is one of the most important factors in the soybean seeds quality decrease. this study aimed at evaluating the influence of impact pressure and seed moisture content, as well as the applicability of image analysis, on mechanical damages in soybean seeds. vencedora and monsoy 8001 cultivars seeds, with moisture content of 13% and 18%, were submitted to mechanical damages, with the aid of an impact simulator equipment (551.6 kpa and 965.3 kpa). subsequently, the seeds were dried at 32oc up to 12% of moisture content. immediately after the impacts and after five months of storage, the seeds were submitted to the tetrazolium and x-rays tests. the impact pressure and seed moisture content directly affected the mechanical damages severity, however, the impact location presented a higher influence than those factors. the image analysis method was very useful for evaluating mechanical damages in soybean seeds, enabling a detailed analysis of different factors effects.
Avalia??o de índices dopplerfluxométricos da veia cava inferior e do ducto venoso em fetos submetidos à transfus?o intravascular
Lopes, Ana Paula Brum Miranda;Rezende, Cézar de Alencar de Lima;Cabral, Ant?nio Carlos Vieira;Leite, Henrique Vitor;
Revista Brasileira de Ginecologia e Obstetrícia , 2002, DOI: 10.1590/S0100-72032002001000005
Abstract: purpose: to evaluate the effect of intravascular transfusion on ductus venosus and inferior vena cava doppler ultrasound indexes (sv/ca) and to relate it to hemoglobin levels before transfusion. methods: this is a transversal prospective study. a total of 62 intravascular transfusions were performed in 27 fetuses from pregnancies with red blood cell isoimmunization. the 62 cases were divided into two groups: (1) fetuses with hemoglobin levels before transfusion £10 g/dl and (2) fetuses with hemoglobin levels before transfusion >10 g/dl. the sv/ca and ca/sv indexes were measured using color doppler ultrasound 6 h before and 12 h after intravascular transfusion. the index values before and after transfusion in all 62 cases were compared. thereafter we compared these indexes before and after transfusion regarding each group. the wilcoxon test was used and the results were considered statiscally significant when p<0.05. results: when we studied the whole group (62 cases) no significant difference was observed between the ca/sv index before and after transfusion (p=0.775). on the other hand, a significant increase in the sv/ca index was observed after transfusion (p=0.004). no significant differences were observed in both the sv/ca and ca/sv indexes before and after transfusion in the group of fetuses with hemoglobin levels before transfusion £10 g/dl (p=0.061 and p=0.345, respectively). there was a significant increase in the ca/sv index after transfusion in fetuses with hemoglobin levels before transfusion >10 g/dl (p=0.049), but the sv/ca index did not change in this group (p=0.086). conclusion: venous doppler study may be useful to understand fetal hemodynamic adjustment after intravascular transfusion. an increase in sv/ca without change in ca/sv after transfusion in anemic fetuses may be an important compensatory mechanism to increase intravascular volume. the increase in ca/sv index in fetuses with hemoglobin levels before transfusion <10 g/dl suggests a state of
Transfus?o Intra-uterina na Isoimuniza??o Materna pelo Fator Rh
Cabral, Antonio Carlos Vieira;Taveira, Marcos Roberto;Lopes, Ana Paula Brum Miranda;Pereira, Alamanda Kfoury;Leite, Henrique Vitor;
Revista Brasileira de Ginecologia e Obstetrícia , 2001, DOI: 10.1590/S0100-72032001000500005
Abstract: purpose: to evaluate the intrauterine treatment of anemic fetuses that underwent intrauterine transfusions due to rhesus isoimmunization. methods: the authors studied sixty-one fetuses undergoing intrauterine transfusions by the intravascular, intraperitoneal or both routes. the hydropic fetuses (19.7%) received only intravascular intrauterine transfusions. there was an overall number of 163 intrauterine transfusions with a mean of 2.7 procedures for each case. the indications for intrauterine transfusions were high values of bilirubin in amniotic fluid analyses by the liley method or a hemoglobin concentration of cord blood below 10.0 g/ml. results: the overall perinatal survival rate was 46% for hydropic fetuses and 84% for the nonhydropic ones. there were no maternal side effects related to the procedures. half of the intrauterine transfusions were performed by the intravascular route. the mean gestational age at the delivery was 34.8 weeks. conclusions: despite better perinatal results with intrauterine transfusions guided by ultrasound, especially using intravascular procedures, rhesus isoimmunization remains as an important cause of high rates of perinatal morbidity and mortality.
Associa??o entre a antropometria e a leptina circulante nos compartimentos materno, fetal e placentário, na gravidez normal
Castro, Flávia Cipriano;Leite, Henrique Vitor;Pereira, Alamanda Kfoury;Reis, Zilma Silveira Nogueira;Cabral, Ant?nio Carlos Vieira;
Revista Brasileira de Ginecologia e Obstetrícia , 2004, DOI: 10.1590/S0100-72032004000900003
Abstract: purpose: to evaluate the importance of circulating maternal and fetal leptin in the healthy gestation, using its association with maternal, placental and fetal anthropometric variables, obtained at birth, and the relationship between the evaluated compartments. methods: in a transversal study a population of 33 single, healthy and term gestations was studied. the evaluated variables were maternal age, maternal weight, body mass index (bmf), weight of the newborn, placental weight, and placental index. samples of maternal blood were immediately obtained before birth and from fetal umbilical cord blood at birth. determination of serum leptin was performed using conventional radioimmunoassay. the relationships between serum leptin concentrations in maternal blood, umbilical artery and vein and the studied variables were assessed through linear regression. results: leptin levels were detected in the blood of all 33 pregnant women and their respective newborns, with maternal blood concentration (17.1±1.77 ng/ml) higher than that of umbilical vessels (vein: 9.0±1.16 ng/ml; artery: 8.23±1.02 ng/ml), p<0.0001. leptin concentrations in the maternal blood were correlated with leptin concentrations in fetal blood (artery: coef. 0.63, p=0.037; vein: coef. 0.72, p=0.006). regarding the anthropometric variables, leptin measured in the maternal blood was associated with initial and final maternal bmf (coef. 1.13; p=0.002; coef. 1,18, p=0.001) and cord leptin levels were correlated with the fetal weight at birth (vein: coef. 0.007, p=0.02; artery: coef. 0.006, p=0.02). conclusion: there was a correlation between maternal and fetal leptin production and probably by the action of similar stimuli during gestation. serum leptin was associated with the weight of the compartment where it circulates.
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