ABSTRACT
ABSTRACT Introduction: Erythrocyte phenotyping is a very important test in the adoption of prophylactic measures to reduce transfusion reactions/alloimmunizations in polytransfused patients. The blood group Diego, in its current, form has 22 antigens, of which 4 are immunogenic, being Dia/Dib and Wra/Wrb, while the others are less expressive. The antigen Dia is of low incidence among whites and blacks, however, it is common in the South American indigenous and Asian Mongolian populations. It is also considered a system of clinical importance for its immunogenicity. Method: The present study aimed to carry out a retrospective and descriptive survey of the frequency of the Dia antigen in the blood donor population at the HEMOPA Foundation Coordinating Blood Center from 12/2018 to 1/2000. The data obtained were from the HEMOPA Foundation SBS Progress and SBS WEB Systems databases. Results: During this period, 941,744 blood bags were collected and, of these, 930 bags were phenotyped for the Dia antigen, of which 842 were negative and 88 (9.7%) positive. The research showed that, among the positive donors for the antigen Dia, 88.6% were brown, 3.4%, black and 8%, white. In the statistical analysis, the frequency observed was higher in browns. Conclusion: In the present investigation, we concluded that our region has a relatively higher frequency of the Dia antigen, when compared to the rest of Brazil, and it occurs more often in browns.
Subject(s)
Transfusion Reaction , Blood Group Antigens , Hemotherapy ServiceABSTRACT
@#The positive antibody screen during pre-transfusion testing helps in the detection of clinically significant antibodies. However, sometimes clinically insignificant antibodies might perplex the serologic workup and can cause a delay in transfusion. Prompt recognition and timely resolution of these discrepancies in pre-transfusion testing, although time-consuming, is essential for the provision of safe blood to recipients. We report a case with an anti-IH antibody complicating the serological workup of pre-transfusion testing and an approach for its resolution and management. The role of transfusion medicine specialists in the characterization of antibodies and the selection of appropriate blood is paramount or warranted to promote safe transfusion practices.
ABSTRACT
Objetivou-se identificar a frequência do grupo sanguíneo DEA 1.1 em cães de Sinop, Mato Grosso, Brasil, para auxiliar a seleção de doadores e receptores de sangue compatíveis e, adicionalmente, avaliar o risco de reações transfusionais em cães sensibilizados. Além disso, a partir dos resultados obtidos, selecionar potenciais doadores de sangue para compor um banco de dados. Um total de 195 cães adultos (de 1 a 4 anos de idade), machos e fêmeas, mestiços e puros, que nunca haviam recebido transfusões de sangue, foram triados no Hospital Veterinário da Universidade do Mato Grosso. A tipagem sanguínea DEA 1.1 foi realizada utilizando-se ensaio imunocromatográfico comercialmente disponível para DEA 1.1 (Quick Test DEA 1.1, Alvedia, Lyon, França). Os resultados demonstraram uma frequência geral de 65% para cães DEA 1.1 positivos (n = 126) e 35% para cães DEA 1 negativos (n = 69). O risco geral de sensibilização de cães DEA 1 negativos após uma primeira transfusão com sangue DEA 1.1 positivo foi calculado em 23%, enquanto o risco deste receptor sensibilizado receber sangue DEA 1.1 positivo em uma segunda transfusão e desenvolver uma reação hemolítica aguda foi calculado em 5%. A tipagem sanguínea dos cães permitiu sua inserção como doadores de sangue tipados para o grupo DEA 1 em um banco de dados preliminar e garantiu a segurança das transfusões de sangue.
The goal of this research was to identify the frequency of the DEA 1.1 blood group in dogs from Sinop, Mato Grosso, Brazil, to help in the recruitment of compatible blood donors and recipients, and to assess the risk of transfusion reactions in previously sensitized dogs. Also, from the obtained results, to pick potential blood donors to compose a data bank. 195 adult dogs (1 to 4 years old), males and females, mongrel and purebred dogs were screened at the Veterinary Hospital of the University of Mato Grosso. The DEA 1.1 blood typing was performed using commercially available immunochromatographic strip for DEA 1.1 (Quick Test DEA 1.1, Alvedia, Lyon, France). The results showed a general frequency of 65% for DEA 1.1 positive dogs (n = 126) and 35% for DEA 1 negative dogs (n = 69). The general risk of sensitization of a DEA 1 negative dog following a first transfusion with DEA 1.1 positive blood was 23%, while the risk of this sensitized recipient to receive DEA 1.1 positive blood in a second transfusion and to develop an acute hemolytic reaction was calculated to be 5%. The blood typing of the dogs allowed their classification as DEA 1 typed blood donors, in a preliminary data bank, and also ensured the safety of blood transfusions.
Subject(s)
Animals , Dogs , Blood Group Antigens/analysis , Dogs/blood , Transfusion Reaction/veterinaryABSTRACT
The goal of this research was to identify the frequency of the DEA 1.1 blood group in dogs from Sinop, Mato Grosso, Brazil, to help in the recruitment of compatible blood donors and recipients, and to assess the risk of transfusion reactions in previously sensitized dogs. Also, from the obtained results, to pick potential blood donors to compose a data bank. 195 adult dogs (1 to 4 years old), males and females, mongrel and purebred dogs were screened at the Veterinary Hospital of the University of Mato Grosso. The DEA 1.1 blood typing was performed using commercially available immunochromatographic strip for DEA 1.1 (Quick Test DEA 1.1, Alvedia, Lyon, France). The results showed a general frequency of 65% for DEA 1.1 positive dogs (n = 126) and 35% for DEA 1 negative dogs (n = 69). The general risk of sensitization of a DEA 1 negative dog following a first transfusion with DEA 1.1 positive blood was 23%, while the risk of this sensitized recipient to receive DEA 1.1 positive blood in a second transfusion and to develop an acute hemolytic reaction was calculated to be 5%. The blood typing of the dogs allowed their classification as DEA 1 typed blood donors, in a preliminary data bank, and also ensured the safety of blood transfusions.
Objetivou-se identificar a frequência do grupo sanguíneo DEA 1.1 em cães de Sinop, Mato Grosso, Brasil, para auxiliar a seleção de doadores e receptores de sangue compatíveis e, adicionalmente, avaliar o risco de reações transfusionais em cães sensibilizados. Além disso, a partir dos resultados obtidos, selecionar potenciais doadores de sangue para compor um banco de dados. Um total de 195 cães adultos (de 1 a 4 anos de idade), machos e fêmeas, mestiços e puros, que nunca haviam recebido transfusões de sangue, foram triados no Hospital Veterinário da Universidade do Mato Grosso. A tipagem sanguínea DEA 1.1 foi realizada utilizando-se ensaio imunocromatográfico comercialmente disponível para DEA 1.1 (Quick Test DEA 1.1, Alvedia, Lyon, França). Os resultados demonstraram uma frequência geral de 65% para cães DEA 1.1 positivos (n = 126) e 35% para cães DEA 1 negativos (n = 69). O risco geral de sensibilização de cães DEA 1 negativos após uma primeira transfusão com sangue DEA 1.1 positivo foi calculado em 23%, enquanto o risco deste receptor sensibilizado receber sangue DEA 1.1 positivo em uma segunda transfusão e desenvolver uma reação hemolítica aguda foi calculado em 5%. A tipagem sanguínea dos cães permitiu sua inserção como doadores de sangue tipados para o grupo DEA 1 em um banco de dados preliminar e garantiu a segurança das transfusões de sangue.
Subject(s)
Animals , Dogs , Blood/immunology , Blood Donors , Blood Group Antigens/analysis , Blood Transfusion/veterinary , Blood Grouping and Crossmatching/veterinary , Dogs/blood , Transfusion Reaction/veterinaryABSTRACT
El desarrollo de la Medicina Transfusional y la Inmunohematología en el Instituto de Hematología e Inmunología en estas cinco décadas se ha caracterizado por logros relevantes como la introducción de métodos de mayor sensibilidad para optimizar el diagnóstico inmunohematológico, entre ellos los ensayos inmunoenzimáticos, la citometría de flujo y las técnicas de inmovilización de antígenos eritrocitarios y plaquetarios por anticuerpos moclonales específicos (MAIEA y MAIPA, respectivamente); la profundización en el estudio de las citopenias inmunes; la pesquisa de agentes infecciosos en donantes de sangre y pacientes politransfundidos; la producción y distribución de anticuerpos hemoclasificadores poli y monoclonales; la labor de referencia nacional del laboratorio de Inmunohematología; las contribuciones al Programa Nacional de sangre que incluyen la confección y distribución de guías clínicas para el uso de la sangre y de procederes para bancos de sangre y servicios de transfusiones; el desarrollo de métodos de aféresis terapéutica; el desarrollo de investigaciones multicéntricas en Medicina Transfusional; la obtención y procesamiento de células madre hematopoyéticas de médula ósea y sangre periférica para su empleo en trasplantes hematopoyéticos y terapia celular; la formación y actualización de profesionales y técnicos en Medicina Transfusional, tanto en Cuba como en otros países de Latinoamérica y la organización de talleres, eventos e intercambios nacionales e internacionales en estas ramas. Las proyecciones de trabajo se encaminan a introducir técnicas moleculares en Inmunohematología para lograr una mejor caracterización de los anticuerpos contra células sanguíneas, profundizar en el estudio de los anticuerpos contra leucocitos y plaquetas, contribuir al desarrollo de un programa nacional de hemovigilancia, crear un banco de células progenitoras de cordón umbilical para uso terapéutico e iniciar programas de maestrías y doctorados en Medicina Transfusional.
The development of Transfusion Medicine and Immunohematology at the Institute of Hematology and Immunology in these five decades has been characterized by relevant achievements such as the introduction of more sensitive methods to optimize the immunohematological diagnosis such as immunoenzymatic assays, flow cytometry and techniques of immobilization of erythrocyte and platelet antigens by specific monoclonal antibodies (MAIEA and MAIPA, respectively); deepening the study of immune cytopenias; screening for infectious agents in blood donors and polytransfused patients; the production and distribution of polyclonal and monoclonal hemoclastic antibodies, the national reference work of Immunohematology Laboratory; contributions to the National Blood Program such as the preparation and distribution of clinical guidelines for the use of blood and procedures for blood banks and transfusion services; the development of therapeutic apheresis methods; the development of multicentric investigations in Transfusional Medicine; the procurement and processing of hematopoietic stem cells from bone marrow and peripheral blood for use in hematopoietic transplantation and cell therapy; the training and updating of professionals and technicians in Transfusion Medicine, both in Cuba and in other countries of Latin America and the organization of workshops, events and national and international exchanges in these branches. The work projections are aimed at introducing molecular techniques in Immunohematology to achieve a better characterization of the antibodies against blood cells, to deep the study of the antibodies against leukocytes and platelets, to contribute to the development of a national haemovigilance program, to create a bank of umbilical cord progenitor cells for therapeutic use and initiate master's and doctoral programs in Transfusion Medicine.
Subject(s)
Humans , Transfusion Medicine/history , Transfusion Medicine/methods , HematologyABSTRACT
BACKGROUND: An automated immunohematology analyzer, DAYMATE M (DAY Medical, Switzerland), has been recently developed. The potential of this analyzer to improve test results has been evaluated. METHODS: A total of 300 blood samples from Seoul St. Mary's hospital and Incheon St. Mary's hospital were tested for ABO and RhD typing. In addition, 336 antibody screening test (AST) samples and 82 patients treated with hematopoietic stem cell transplantation (HSCT) were included. AST results by DAYMATE M were compared with those obtained by a manual method using DS-Screening II (Bio-Rad Laboratories, Switzerland) and red blood cells from Selectogen (Ortho-Clinical diagnostics Inc., USA). RESULTS: Of the 300 patients enrolled, 87, 73, 79, and 61 had type A, B, O, and AB blood, respectively. The concordance rate was 99.9% for cell typing and 97.0% for serum typing. One discordant case was classified as type B instead of AB, and six discordant serum-typing cases were type A, but classified as type AB. Among the 336 AST samples, the concordance rate was 93.2%. From 136 positive cases, six were discordant. Within the 82 HSCT-treated patients, the concordance rate for ABO blood typing was 92.2%. Among the six discordant cases, DAYMATE M typed four cases as donor type where the standard method typed them as the recipient blood type. CONCLUSIONS: The DAYMATE M automated immunohematology analyzer performs reliably for ABO and RhD typing, as well as for ASTs and on samples from patients treated with HSCT.
Subject(s)
Humans , Blood Grouping and Crossmatching , Erythrocytes , Hematopoietic Stem Cell Transplantation , Mass Screening , Methods , Seoul , Tissue DonorsABSTRACT
<p><b>OBJECTIVE</b>To evaluate the effect of electro-acupuncture on Zusanli (ST 36), Guanyuan (RN 4) in patients with sepsis, and explore its mechanism in term of immune regulation.</p><p><b>METHODS</b>In this prospective randomized controlled trial, 60 patients with sepsis were randomly assigned to the control group and the intervention group equally by block randomization. Patients in the control group received routine treatment and those in the intervention group received electro-acupuncture at bilateral Zusanli and Guanyuan in addition to routine treatment, respectively. The mortality at 28 days, Acute Physiology and Chronic Health Evaluation (APACHE)-II score were compared to evaluate the effect, and the levels of T cell subsets (CD3+, CD4+, CD8+, CD4+/CD8+) and monocytes of human leukocyte antigen (HLA)-DR using flow cytometry were compared to explore the mechanism of this combined treatment.</p><p><b>RESULTS</b>Fifty-eight patients completed the trial with 29 in each group. There was no significant difference of mortality in the 28th day between the two groups, with 5 death of 29 patients in the intervention group (17.2%) and 9 of 29 in the control group (31.0%). After treatment, APACHE-II score of both groups was significantly decreased, however, score of the intervention group was lower than the control group (13.28±7.07 vs. 17.10±5.83; P<0.01). The levels of CD3+, CD4+, CD8+ and CD4+/CD8+ ratio of the intervention group improved after treatment and were higher than the control group (59.71%±11.94% vs. 52.54%±11.86%; 36.46%±7.60% vs. 31.58%±10.23%; 18.40%±8.82% vs. 23.07%±7.30%; 2.38±1.14 vs. 1.54±0.80, respectively; all P<0.05). The expression of HLA-DR significantly increased after treatment in the intervention group than that in the control group (7.28%±9.26% vs. 1.27%±7.00%; P<0.01).</p><p><b>CONCLUSION</b>Electro-acupuncture at Zusanli and Guanyuan could improve clinical curative effect in patients with sepsis, which might be achieved by regulation of the immune system.</p>
Subject(s)
Aged , Female , Humans , Male , Acupuncture Points , Electroacupuncture , Flow Cytometry , HLA-DR Antigens , Allergy and Immunology , Sepsis , Allergy and Immunology , Mortality , Therapeutics , T-Lymphocyte Subsets , Allergy and ImmunologyABSTRACT
Objetivou-se com este estudo determinar a frequência de antígenos eritrocitários do sistema AB em felinos domésticos da Paraíba, Brasil. Foram selecionados aleatoriamente 178 gatos, clinicamente saudáveis, sem pré-requisitos quanto a sexo ou raça, com peso corporal acima de 1,5 kg e faixa etária acima de um ano de idade, abordados no ato da consulta ambulatorial em clínicas médicas de pequenos animais distribuídas entre três cidades da Paraíba (João Pessoa, Campina Grande e Patos). A determinação dos tipos sanguíneos foi realizada através do teste de hemaglutinação em tubo de ensaio e, a tipagem reversa foi realizada para as amostras tipos B e AB para confirmação e evidenciação de aloanticorpos naturais. Neste estudo a frequência relativa de antígenos eritrocitários A, B e AB em sua totalidade para felinos sem raça foram 98,1%, 1,21% e 0,69%, respectivamente. Todos os felinos com definição racial foram do tipo sanguíneo A. Diante destes, a probabilidade de ocorrência de reações transfusionais aleatórias obtidas foi de 2,78%, sendo cerca 40% (1,11%) potencialmente fatais. Desta forma, dado o conhecimento da frequência dos diferentes tipos sanguíneos em felinos, de uma determinada região, conclui-se que a tipagem sanguínea e o teste de compatibilidade, são importantes ferramentas que permitem ao médico veterinário tomar medidas preventivas que minimizem riscos de ocorrência de reações transfusionais e isoeletrólise neonatal e, estabelece pré-requisitos a respeito dos riscos de procedimentos hemoterápicos em felinos que circunstancialmente necessitem serem conduzidos de forma aleatória.
The objective of this study was to determine the frequency of the AB blood group antigens system in domestic cats of Paraíba, Brazil. We randomly selected 178 cats which were clinically healthy, with no prerequisites in terms of gender or race, weighing above 1.5 kg, and were over one year of age. These cats were randomly selected when they entered the small animal clinic facilities in the cities of João Pessoa, Campina Grande and Patos. The determination of blood types was made using the hemagglutination test tube, and the reverse typing was performed for samples B and AB types and for confirmation of alloantibodies natural disclosure. In this study the relative frequency of A, B and AB blood group antigens in cats without a determined breed was 98.1%, 1.21% and 0.69% respectively. All cats with breed definition were blood type A. The likelihood of random transfusion reactions was 2.78%, approximately 40% (1.11%) potentially fatal. Thus, given knowledge of the frequency of different blood types in cats, from a given region, it is concluded that blood typing and compatibility test are important tools that enable the veterinarian to take preventative measures to minimize risks of isoelectrolisys reactions and neonatal transfusion, and establishes prerequisites about the risks of hemotherapic procedures in cats that require circumstantially to be conducted randomly.
Subject(s)
Animals , Antigens/administration & dosage , Antigens/analysis , Cats , Erythrocytes/chemistry , Blood Grouping and Crossmatching/methods , Blood Grouping and Crossmatching , Blood Grouping and Crossmatching/veterinaryABSTRACT
El desarrollo de la Inmunohematología en el Instituto de Hematología e Inmunología en los últimos años se ha caracterizado por la introducción de los anticuerpos monoclonales hemoclasificadores y de nuevos ensayos para profundizar y optimizar el diagnóstico inmunohematológico, así como elevar el nivel científico de profesionales y técnicos vinculados con la especialidad. Los resultados más relevantes se obtuvieron en la generación de anticuerpos monoclonales y en el estudio de los auto y aloanticuerpos eritrocitarios y plaquetarios. Se ha destacado también la labor como Laboratorio de Referencia en Inmunohematología, así como los aportes a la docencia en medicina transfusional. Las proyecciones futuras de trabajo deberán estar encaminadas a la introducción de las técnicas moleculares en Inmunohematología y a profundizar en el estudio de los anticuerpos contra leucocitos y plaquetas
The development of the Immunohematology in the Institute of Hematology and Immunology in past years has been characterized by the introduction of hemoclassifying monoclonal antibodies and of new trials to deepen and to optimize the immunohematologic diagnosis, as well as to raise the scientific level of the professionals and technicians linked to specialty. The more relevant results were achieved in monoclonal antibodies generation and in the study of the erythrocyte and platetelet alloantibodies and autoantibodies. The work as Immunohematology Reference Laboratory has been emphasized as well as the contributions to transfusion medicine teaching. The future work projections must to be directed to introduction of molecular techniques in Immunology and to deepen in the study of antibodies to leukocytes and platelets
Subject(s)
Humans , Male , Female , Antibodies, Monoclonal/immunology , Blood Group Antigens/history , Immune System Diseases/diagnosis , Hematology/history , Medical Laboratory Science/methodsABSTRACT
The study of canine immunohematology is very important for veterinary transfusion medicine. The objective of this study was to determine the DEA blood type frequencies in a purebred canine blood donor population from Porto Alegre, RS, Brazil. One hundred clinically healthy purebred dogs were chosen, 20 dogs from each breed (Great Dane, Rottweiler, Golden Retriever, German Shepherd and Argentine Dogo). Blood samples were taken in ACD-A tubes and the MSU hemagglutination tube test (MI, USA) was used to determine the blood types. The studied population presented general frequencies of 61 percent for DEA 1.1, 22 percent for DEA 1.2, 7 percent for DEA 3, 100 percent for DEA 4, 9 percent for DEA 5 and 16 percent for DEA 7. A significant association was found between breeds and certain combinations of blood types in this population. The results are in agreement with the literature since most part of the canine population studied was positive for DEA 1.1, the most antigenic blood type in dogs. Differences were found among the studied breeds and those should be considered when selecting a blood donor. The knowledge of blood types frequencies and their combinations in different canine populations, including different breeds, is important because it shows the particularities of each group, helps to keep a data bank of local frequencies and minimizes the risks of transfusion reactions.
O estudo da imunohematologia canina é muito importante para a medicina veterinária transfusional. O objetivo deste estudo foi determinar as frequências dos tipos sanguíneos do sistema DEA em uma população de cães de raça que fazem parte de um programa de cães doadores de sangue em Porto Alegre, RS, Brasil. Cem cães saudáveis de raça pura foram selecionados, vinte de cada raça (Dogue Alemão, Rottweiler, Golden Retriever, Pastor Alemão e Dogo Argentino). Amostras de sangue foram coletadas em tubos contendo ACD-A e o teste de hemaglutinação em tubo de ensaio da MSU (MI, EUA) foi utilizado para determinar os tipos sanguíneos. A população estudada apresentou frequências gerais de 61 por cento para DEA 1.1, 22 por cento para DEA 1.2, 7 por cento para DEA 3, 100 por cento para DEA 4, 9 por cento para DEA 5 and 16 por cento para DEA 7. Uma associação significativa foi encontrada entre as raças e certas combinações de tipos sanguíneos nesta população. Os resultados estão de acordo com a literatura, visto que a maioria da população canina estudada foi positiva para DEA 1.1, o tipo sanguineo mais antigênico em cães. Foram encontradas diferenças entre as raças estudadas e estas devem ser consideradas na seleção de um doador de sangue. O conhecimento das frequências dos tipos sanguíneos e de suas combinações em diferentes populacões caninas, incluindo diferentes raças, é importante, pois demonstra as particularidades de cada grupo, auxilia na manutenção de um banco de dados sobre as frequências locais e minimiza os riscos de reações transfusionais.
Subject(s)
Animals , Dogs , Dogs/blood , Blood Transfusion/veterinary , Blood Grouping and Crossmatching , ErythrocytesABSTRACT
A tecnologia dos eritrócitos magnetizados (E.M.®Technology) é uma grande inovação nos ensaios imunoematológicos. Os testes são realizados manualmente na estação detrabalho Freelys®Nano ou no equipamento automatizado Qwalys® (Diagast, Loos, France). O método utiliza hemácias magnetizadas e uma placa magnética substitui a centrifugação. As microplacas para a classificação sangüínea e fenotipagem Rh e K contêm anti-soros monoclonais IgM. As microplacas destinadas a pesquisa de anticorpos irregulares (PAI) e prova cruzada (PC) contêm antiglobulina humana (AGH) monoclonalmurina: anti-IgG na PAI e na PC anti-IgG + anti-IgM de baixo título para detectar anticorpos ABO. Na PAI e na PC, as reações acontecem na camada contendo AGH (imunocaptura) e visa detectar anticorpos IgG. A utilização de um meio de alta densidade possibilita a utilização da AGH sem lavagens prévias. Na avaliação da E.M.®Technology na classificação sangüínea, Fenotipagem, PAI e PC, na estação Freelys®Nano, foram utilizadas amostras de pacientes, doadores, sangue de cordão, hemácias de pacientes com teste de Coombs direto positivo e concentrados de hemácias. Todas as amostras foram paralelamente testadas em gel-teste (Diamed e Grifols). A concordância entre a E.M.®Technology e o gel-teste foi: 100% na classificação ABO e RhD e na fenotipagem Rh/ K, 94,6% na PAI e 92,3% na PC. A sensibilidade da E.M.®Technology na detecção de anticorpos IgG foi 95,5% em ambos os métodos. A E.M.®Technology mostrou um bom desempenho nos testes efetuados.
The erythrocytes magnetized technology (E.M.® Technology) is a great innovation in the field of blood banking. The tests can be performed manually on a Freelys® Nano workstation or on thefully-automated system QWALYS® (Diagast, Loos, France). This method does not require centrifugation steps thanks to the use of magnetic red blood cells and a magnetic plate. For blood grouping and Rh/K phenotyping, the microplate contains monoclonal IgMantibodies. The wells of the microplate to perform antibody screening and cross-matching are coated with murine monoclonal anti-human globulin: anti-IgG for antibody screening and anti-IgG + anti-IgM for cross-matching. The E.M.® Technology is only able to detectIgG antibodies. A high-density medium layer avoids the necessity of rinsing before the antiglobulin reagent. To evaluate the performance of E.M.® Technology on a Freelys® Nano work station for blood grouping, Rh/K phenotyping, antibody screening and crossmatching, we selected samples from patients, blood donors, blood cords, red blood cells from patients with positive direct antiglobulin test (DAT) and red blood cells from storage blood bags. In parallel, the tests were performed using the gel-technique (Diamed and Grifols). The concordance between E.M.® Technology and gel-testwas 100% for blood grouping and Rh/K phenotyping, 94.6% for antibody screening and 92.3% for cross-matching. The sensitivity to detect IgG antibodies was 95.5% in both methods. The E.M.® Technology on a Freelys® Nano workstation provided good resultsin all the tests performed.
Subject(s)
Humans , Agglutination Tests , Antibodies/analysis , Employee Performance Appraisal , Cross Reactions , Erythrocytes , Hematologic TestsABSTRACT
Neste estudo foram definidos os índices de detecção dos anticorpos regulares ABO maternos em recém-nascidos pelo método de tipagem sangüínea reversa estendida até fase de antiglobulina humana (TRAGH) e a relação destes resultados com os achados de outras metodologias envolvidas no diagnóstico da incompatibilidade materno-fetal pelo sistema ABO (IABO). Foram colhidasamostras sangüíneas para análise imuno-hematológica de 38 recém-nascidos com tipo sangüíneo A ou B, apresentando até 30 dias de vida (sem conhecimento prévio dos fenótipos ABO maternos) e realização dos testes de tipagem ABO direta, TRAGH, Coombs direto e eluato-LUI, visando detectar anti-A e/ou anti-B. Os resultados demonstraram que a TRAGH efetuou a detecção dos anticorpos regulares ABO maternos na maioria das amostras analisadas nas quais foram confirmados os casos de IABO (09 de 15 amostras), constituindo-se, mediante a análise conjunta com os demais dados imuno-hematológicos, em um útil parâmetro laboratorial na adequação imunológica do hemocomponente ao receptor ena confirmação diagnóstica de IABO.
In this study were defined the exponents of the detection of mothers ABO regulars antibodies in newborns by the reverse blood typing extend up to stage of the antihuman globulin method (RTAGH) and the relacion this results with the faind other methods include in the diagnosis of the ABO maternal-fetal incompatibility (IABO). Samples of blood were picked for immunohematology analysis from 38 newborns with the blood type A our B , with until 30 days of life ( without previous knowing of the ABO mothers types) and make of the ABO typing direct, RTAGH, Coombs direct and elution by freezing tests, purposing the detection of the anti-A and/our anti-B. The results demonstrate with the RTAGH maked the detection of the mothers ABO regulars antibodies in the most samples analyses with the were confirmated the cases of the IABO (09 of 15 samples), constitute, trough the completeness analyse with too much tests immunohematology, in the useful laboratory information in the imunology adjust of the hemocomponent to the pacient and in the diagnosis of IABO confirmation.
Subject(s)
Humans , Infant, Newborn , ABO Blood-Group System , Antibodies , Coombs Test , Blood Group Incompatibility/congenital , Blood Group Incompatibility/immunology , Blood Grouping and Crossmatching/methodsABSTRACT
The importance and the use of synthetic peptides and recombinant proteins in immunohematology and the identification of antibodies are presented and discussed in this report.
No relato é apresentada e discutida a importância e o emprego dos peptideos sintéticos a proteinas recombinantes em imunohematologia e identificação de anticorpos.