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- W1974966170 abstract "There are little data on the effects of propofol on cerebral blood volume (CBV). We studied the effects of changes in Paco2 on CBV and cerebral blood flow (CBF) during propofol anesthesia in eight New Zealand white rabbits. We also investigated the effects of propofol over time on CBV and CBF during normocapnia (control group). At normocapnia, the mean (± sd) CBV and CBF values were 2.41 ± 0.68 mL/100 g and 56 ± 28 mL/100 g/min, respectively,. When Paco2 was reduced from 41 to 27 mm Hg, no significant change in either CBV or CBF was observed (P > 0.10). However, increasing Paco2 from 41 to 58 mm Hg resulted in a 30% increase in CBV (3.08 ± 0.86 mL/100 g, P < 0.05) and a 91% increase in CBF (97 ± 39 mL/100 g/min, P < 0.01). In the control group, there were no significant changes in CBV and CBF (P > 0.10) during 2 h of propofol anesthesia. These results indicate that, during propofol anesthesia, cerebrovascular reactivity of blood flow and blood volume is maintained during hypercapnia but is markedly diminished during hypocapnia. Implications During propofol anesthesia in rabbits with normal brains, a reduction in the arterial carbon dioxide level may not always be accompanied by a reduction in brain blood flow and blood volume." @default.
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- W1974966170 date "2000-06-01" @default.
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- W1974966170 title "Cerebral Blood Volume and Blood Flow at Varying Arterial Carbon Dioxide Tension Levels in Rabbits During Propofol Anesthesia" @default.
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- W1974966170 doi "https://doi.org/10.1097/00000539-200006000-00021" @default.
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