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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Tempo coleta/processamento e qualidade da amostra de sangue de cordão umbilical / Time collecting/processing and umbilical cord blood sample quality

Ferraz, Ubirajara Costa 13 August 2018 (has links)
Orientador: Ricardo Barini / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Ciencias Medicas / Made available in DSpace on 2018-08-13T01:59:55Z (GMT). No. of bitstreams: 1 Ferraz_UbirajaraCosta_M.pdf: 1594344 bytes, checksum: e8aa86e55cf5506e54d472671ae37ff1 (MD5) Previous issue date: 2009 / Resumo: Objetivo: Avaliar a associação do intervalo de tempo entre coleta e processamento do sangue de cordão umbilical e a qualidade da amostra. Sujeitos e métodos: As amostras de sangue de cordão umbilical, colhidas no terceiro período do parto, foram acondicionadas em caixas homologadas para transporte de material biológico, com monitoração da temperatura, e enviadas ao Banco de Sangue de Cordão Umbilical, onde foram submetidas à contagem do número de células nucleadas, do número de células viáveis, do número de células CD 34+ e pesquisa de contaminação, nos intervalos de tempo de até 24, até 48 e até 72 horas. Os dados foram analisados pelo teste de variância para medidas repetidas MANOVA e comparados através do teste qui-quadrado de McNemar, considerando-se o nível de significância de 5%. Resultados: As médias e as medianas do número de células nucleadas, número de células viáveis e número de células CD34+ tiveram quedas significativas (P <0,0001) com o aumento do intervalo de tempo coleta/processamento, sendo entre 24 e 48 horas menor do que a comparação entre 24 e 72 horas. Constatada correlação linear entre as médias de células viáveis e células CD34+ nos três momentos da análise. A pesquisa de contaminação foi negativa em todas as amostras. Conclusões: O aumento do intervalo de tempo coleta/processamento influenciou negativamente na contagem de células nucleadas, células viáveis e CD34+ e não esteve associado à contaminação das amostras. Foi constatada correlação linear entre a queda do número de células viáveis e de células CD34+ / Abstract: Objective: To evaluate the association between the time interval from umbilical cord blood sampling until analysis and the quality of the sample. Materials and methods: Umbilical cord blood samples collected during the third stage of labor were placed in temperature-controlled boxes for the transport of biological material and sent to an umbilical cord blood bank, where the number of nucleated cells, the number of viable cells and the number of CD34+ cells were counted, and samples were additionally tested for contamination, at the following time intervals: up to 24 hours, up to 48 hours and up to 72 hours following sampling. The data were analyzed using the multivariate analysis of variance (MANOVA) and compared using McNemar's chi-square test. Significance was defined at p<0.05. Results: Means and medians of the number of nucleated cells, number of viable cells and number of CD34+ cells decreased significantly (p<0.0001) as a function of the increased time between sampling and analysis, the difference between 24 and 48 hours being less than the difference between 24 and 72 hours. A linear correlation was found between the mean number of viable cells and CD34+ cells at the three moments of analysis. Contamination testing was negative in all samples. Conclusions: The increase in the interval of time from sampling until analysis negatively affected the number of nucleated cells, viable cells and CD34+ cells but was not associated with specimen contamination. A linear correlation was found between the decrease in the number of viable cells and CD34+ cells / Mestrado / Tocoginecologia / Mestre em Tocoginecologia

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