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Revista Brasileira de Anestesiologia
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Efeito in vitro de Dexmedetomidina na Agregação Plaquetária

Authors: Kose, Emine Arzu; Nevruz, Oral; Honca, Mehtap; Yildirim, Vedat;

Efeito in vitro de Dexmedetomidina na Agregação Plaquetária

Abstract

JUSTIFICATIVA E OBJETIVOS: Dexmedetomidina é um α2-agonista seletivo. Há 250-300 receptores α2-adrenérgicos na superfície de cada uma das plaquetas humanas e a efedrina induz a agregação das plaquetas por ligação desses receptores. Este estudo foi desenvolvido para estudar a função plaquetária após incubação com concentrações terapêuticas de dexmedetomidina. MÉTODOS: O estudo foi conduzido com 18 homens saudáveis, não fumantes, com idades entre 25 e 35 anos. Porque o intervalo recomendado de concentração terapêutica de dexmedetomidina, obtido por infusão intravenosa, é de 0,4-1,2 ng.mL-1, as soluções de dexmedetomidina foram preparadas em três concentrações diferentes. Os valores calculados da solução de dexmedetomidina e do diluente sem dexmedetomidina (controle) foram adicionados a uma amostra de sangue. Assim, 0; 0,4; 0,8 e 1,2 ng.mL-1 de concentrações plasmáticas de dexmedetomidina foram obtidas. Cada concentração de dexmedetomidina foi incubada com sangue total a 37ºC durante 15 minutos. Em seguida, as amostras de sangue foram centrifugadas para preparar o plasma rico em plaquetas e o plasma pobre em plaquetas. O plasma rico em plaquetas foi diluído com o plasma pobre em plaquetas para gerar o teste de plasma rico em plaquetas com uma contagem final de plaquetas de 250 ± 50 x 10(9).L-1. RESULTADOS: As amplitudes e os declives da agregação plaquetária foram estatisticamente semelhantes entre todos os grupos nos testes de agregação feitos com ADP, colágeno ou adrenalina. CONCLUSÃO:As concentrações terapêuticas de dexmedetomidina não tiveram efeito in vitro nas funções plaquetárias de indivíduos saudáveis.

Country
Turkey
Keywords

ANALGÉSICOS, Agregação Plaquetária, ANALGÉSICOS, Dexmedetomidina, In Vitro, Dexmedetomidina, Anesthesiology and Pain Medicine, Anesthesiology, Agregación Plaquetaria, Platelet aggregation, RD78.3-87.3, Dexmedetomidine

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    popularity
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    influence
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    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
5
Average
Average
Average
Green
gold