Abstract
A 12-hour overnight fast in 17 subjects did not result in a significant increase in blood viscosity, as occurs after a 24-hour fast.The usual preoperative fast does not therefore appear to have any adverse rheological effect.However, when it is necessary to prolong the fast, intravenous fluids should be given to prevent the expected increase in blood viscosity which then might have clinical effects as a result of decreased organ perfusion.
Résumé
Un jeûne nocturne, d’une durée de 12 heures, imposé à 17 jeunes sujets en bonne santé, n’a pas provoqué d’accroissement significatif de la viscosité sanguine, contrairement a ce que Ton observe lorsque le jeûne dure 24 heures; on en conclut done que le jeûne pré-opératoire habituel n’induit probablement pas d’effet rhéologique défavorable. Cependant, lorsque le jeûne est appelé à se prolonger au-delà d’une douzaine d’heures, il devient nécessaire d’administrer des liquides par voie veineuse pour prévenir l’augmentation de la viscosité sanguine qui pourrait avoir des effets néfastes sur la perfusion tissulaire.
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Aronson, H.B., Horne, T., Blondheim, S.H. et al. Blood viscosity and the overnight fast. Canad. Anaesth. Soc. J. 27, 550–552 (1980). https://doi.org/10.1007/BF03006883
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DOI: https://doi.org/10.1007/BF03006883