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  • 1
    ISSN: 1590-3478
    Keywords: Hyperglycemia ; cerebral blood flow ; cerebral plasma volume ; stroke
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Sommario Il flusso ematico cerebrale (CBF) e il volume plasmatico cerebrale (CPV) sono stati misurati in corso di iperglicemia costante negli emisferi e nel tronco-cervelletto di ratti. Sono stati studiati tre gruppi di ratti, ciascuno con un diverso livello glicemico, 25, 33.3, 44.4 mml/L e un gruppo normoglicemico di controlo (8–9 ml/L). CBF è risultato immodificato ai livelli iperglicemici di 25 e 33.3 mml/L. Al livello iperglicemico più alto, i valori medi emisferici e del tronco-cervelletto sono risultati più bassi che nel controllo, benché le differenze non fossero statisticamente significative. CPV è stato trovato immodificato alla iperglicemia di 25 mml/L, mentre era aumentato ai livelli di 33.3 e 44.4 mml/L. I risultati dello studio non sono consistenti coll'ipotesi che l'iperglicemia favorisca il danno ischemico attraverso una riduzione del CBF.
    Notes: Abstract Cerebral blood flow (CBF) and cerebral plasma volume (CPV) were measured under steady-state hyperglycemic conditions in the hemispheres and brainstem-cerebellum of conscious rats. There groups of hyperglycemic animals each having a different level of plasma glucose concentration, 25,33.3, 44.4 mmol/l, and a normoglycemic control group were studied. CBF was not affected at the hyperglycemic levels of 25 and 33.3 mmol/l. Mean hemispheric and brainstem-cerebellum CBF values appeared lower than in controls at the highest glycemic level althoug the differences were not statistically significant. CPV was found to be unchanged at the hyperglycemic level of 25 mmol/l, while it was found to be increased in the hemispheres of the animals whose plasma glucose concentration had been elevated to 33.3 and 44.4 mmol/l. The results of the study do not support the claim that hyperglycemia may enhance ischemic brain injury by reducing CBF.
    Type of Medium: Electronic Resource
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