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- W2003209670 abstract "This study was designed to test the hypothesis that acute hypovolemia would compromise the compensatory hemodynamic mechanisms to midazolam and decrease its metabolic clearance. Experiments were performed on seven chronically instrumented female beagle dogs. Animals received a single intravenous dose of midazolam, 10 mg/kg, 4 days apart during normovolemic (N) and hypovolemic (H) states in a random sequence. Hypovolemia was achieved by the withdrawal of 26 ml/kg of blood, equivalent to one-third of the calculated blood volume. Midazolam plasma concentrations were determined at 0.25, 0.5, 1, 2, 3, 4, 5, 6, 8, 10, and 12 h after midazolam injection. Elimination half-life (t 1/2 beta) was significantly longer and total clearance was significantly lower during H than during N. Initial distribution half-life, central compartment volume, total volume of distribution, and plasma protein binding were similar in both N and H states. Midazolam caused a significant decrease in systolic blood pressure (SBP) and an increase in heart rate (HR) during N, and produced significant decreases in SBP, diastolic blood pressure (DBP), and mean arterial pressure (MAP) during H. Midazolam led to similar per cent decreases in blood pressure and cardiac output in states N and H; however, the absolute values of blood pressure and cardiac output were significantly (P less than 0.001) lower in the hypovolemic state than in the normovolemic state. These data suggest that the hypotensive effects of midazolam, like those of other intravenous induction agents, could be potentiated by volume depletion." @default.
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- W2003209670 title "Midazolam Pharmacodynamics and Pharmacokinetics during Acute Hypovolemia" @default.
- W2003209670 doi "https://doi.org/10.1097/00000542-198508000-00004" @default.
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