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- W2066448907 abstract "Activation of sympathetic nervous system has a crucial role in mediating the pneumatic tourniquet inflation induced hyperdynamic response. Dexmedetomidine, a selective α(2)-adrenergic receptor agonist, has potent sympatholytic effects. We conducted this prospective, randomized, placebo-controlled, double-blinded study to elucidate the effects of dexmedetomidine on attenuating the tourniquet-induced hyperdynamic response during general anesthesia.We included a total of 72 healthy adult patients undergoing elective lower limb surgery. Under general anesthesia, patients were randomized to the dexmedetomidine or the control group (n = 36 in each group). The dexmedetomidine group received a loading dose of dexmedetomidine (0.8 μg·kg(-1) over 10 min) followed by continuous infusion of dexmedetomidine (0.4 μg·kg(-1).h(-1)) until tourniquet deflation. The control group received normal saline instead. We compared tourniquet-induced changes in hemodynamic parameters between groups to elucidate the effects of dexmedetomidine.Tourniquet inflation induced significant increases in hemodynamic parameters, including heart rate, systolic arterial pressure, mean arterial pressure, diastolic arterial pressure, rate pressure product, cardiac output, and stroke volume in the control group. The effects of tourniquet inflation on increasing hemodynamic parameters were significantly attenuated by dexmedetomidine: heart rate (P < 0.001), systolic arterial pressure (P = 0.002), mean arterial pressure (P = 0.042), diastolic arterial pressure (P = 0.012), rate pressure product (P < 0.001), and cardiac output (P = 0.001) of the dexmedetomidine group were significantly lower than those of the control group. However, the stroke volume of these groups was comparable.Dexmedetomidine attenuates tourniquet-induced hyperdynamic response in general anesthesia patients undergoing lower limb surgeries." @default.
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- W2066448907 date "2013-01-01" @default.
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- W2066448907 title "Dexmedetomidine attenuates tourniquet-induced hyperdynamic response in patients undergoing lower limb surgeries: A randomized controlled study" @default.
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- W2066448907 doi "https://doi.org/10.1016/j.jss.2012.01.008" @default.
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