-
[show abstract]
[hide abstract]
ABSTRACT: Alloimmunization is the formation of antibodies when there is an exposition of the individual to non-self antigens, as it occurs, for example, in the transfusion of incompatible blood and pregnancies, in whom the fetus express in its sanguineous cells antigens exclusively of paternal origin. This article is restricted to the alloimmunization against erythrocytes antigens in obstetric patients. Almost all the anti-erythrocytes antibodies can be fit in one of the 29 systems of already recognized sanguineous groups, being more implied in the hemolytic disease of the newborn anti-D, anti-c and anti-Kell, followed by anti-C, anti-E, anti e, anti-Fy feminine and anti-Jk feminine. The research of irregular antibodies, to permit the diagnosis of alloimmunizated people, and the modern genetic techniques have better characterized these patients for the prophylaxis and prenatal segment. The traditional accompaniment of the gestations of risk for hemolytic disease of the newborn, with the spectral analysis of the amniotic liquid and the intraperitoneal transfusion, has being quickly substituted for the Doppler ultrasound evaluation in the middle cerebral artery, the intravascular transfusion guided for ultrasonography in real time, beyond improvements in the materials and the quality of the blood, that in set, have raised the survival of the attempting fetus. Doubtlessly, the correct application of the prophylaxis with use of anti-D is successful with potential to reduce the alloimmunization cases.
Revista brasileira de ginecologia e obstetrićia: revista da Federação Brasileira das Sociedades de Ginecologia e Obstetrícia 07/2009; 31(6):311-9.
-
[show abstract]
[hide abstract]
ABSTRACT: Avaliamos a ocorrência da hemorragia feto-materna entre 343 puérperas que receberiam profilaxia da aloimunização Rh com emprego de imunoglobulina anti-D. Realizamos o teste de roseta para triagem dos casos que necessitariam determinação quantitativa do volume de sangue fetal transferido para circulação materna, que foi então apurado pelo teste de Kleihauer-Betke (K-B). O teste de roseta apresentou resultado positivo em 22 casos (6,4%). Em cinco dessas amostras o teste de K-B não apontou hemorragia feto-materna (falso positivo do teste de roseta de 1,45%) e noutra a leitura do teste não foi conclusiva. Tivemos oito casos com volume apurado de hemorragia feto-materna < 10ml (2,3%), seis com hemorragia feto-materna entre 10 e 30ml (1,7%) e duas puérperas apresentaram transferência sangüínea feto-materna maior que 30ml (0,58%), necessitando suplementação além da dose padrão de anti-D. O teste de roseta dispensou 93,6% das pacientes da avaliação adicional da hemorragia feto-materna por método quantitativo.
Cadernos de Saúde Pública. 01/2005;
-
[show abstract]
[hide abstract]
ABSTRACT: This study aimed to assess the frequency of different blood phenotypes and to predict the risk of Rh D alloimmunization and maternal-fetal incompatibility in a Brazilian population living in the West zone of the city of São Paulo-Brazil.
This descriptive study evaluated 2,372 post-delivery women and their liveborn during one year. Blood types were analyzed by means of tube agglutination tests.
The blood type frequencies were: 50.67 O, 32.17 A, 13.45 B, 3.75 AB, 90.34 Rh D(+) and 9.66 Rh D(-). ABO maternal-fetal incompatibility was detected in 18.4% and Rh D incompatibility in 7%.
The fraction of Rh D(-) population at high risk for Rh D alloimmunization was 82%, emphasizing the importance of Rh D alloimmunization profilaxis.
Revista da Associação Médica Brasileira 53(1):44-6. · 0.77 Impact Factor
-
[show abstract]
[hide abstract]
ABSTRACT: This study evaluated fetomaternal hemorrhage (FMH) in 343 postpartum patients who required prophylaxis of Rh alloimmunization with anti-D immunoglobulin. The rosette test was applied to screen for patients needing quantitative determination of fetal blood transferred from the maternal circulation, which was then measured by the Kleihauer-Betke test (K-B). The rosette test was positive in 22 cases (6.4%). In five of these cases, K-B did not show fetomaternal hemorrhage (a 1.45% false-positive rate for the rosette test), and in one case the test was inconclusive. There were 8 cases with FMH < 10 ml (2.3%), 6 cases with FMH from 10 to 30 ml (1.7%), and two cases with FMH > 30 ml (0.58%), requiring a supplementary dose of anti-D. The study concludes that following the rosette test, additional evaluation of FMH using a quantitative test was unnecessary in 93.6% of the cases.
Cadernos de Saúde Pública 21(5):1357-65. · 0.89 Impact Factor
