Journal of clinical anesthesia
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Randomized Controlled Trial Clinical Trial
Effects of tramadol and meperidine on respiration, plasma catecholamine concentrations, and hemodynamics.
To evaluate the effects of high analgesic doses of tramadol and meperidine on respiration, plasma catecholamine concentrations, and hemodynamic parameters. ⋯ Tramadol exhibited a minimal effect on respiration and breathing pattern in healthy volunteers. The respiratory effects of meperidine bolus were predictable with decreasing tidal volume and pulse oxygen saturation. In contrast, during meperidine infusion, adequate respiration was preserved despite the large amount of meperidine infused.
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Randomized Controlled Trial Comparative Study Clinical Trial
The optimal effective concentration of lidocaine to reduce pain on injection of propofol.
To determine the optimal concentration of lidocaine that reduces pain on injection of a propofol-lidocaine mixture. ⋯ The optimal effective concentration of lidocaine, which decreased the incidence of pain caused by propofol injection, was 0.1% in the currently studied population.
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Randomized Controlled Trial Clinical Trial
Preoperative pulse wave velocity fails to predict hemodynamic responses to anesthesia and to surgical stimulation.
To determine whether pulse wave velocity (PWV), which is a useful indicator of cardiovascular disease, can predict the hemodynamic responses to anesthesia and surgical stimulation in surgical patients. ⋯ Preoperative PWV fails to predict hemodynamic responses to anesthesia and to surgical stimulation.
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Randomized Controlled Trial Clinical Trial
Xenon suppresses the hypnotic arousal in response to surgical stimulation.
To evaluate the suppressive effects of xenon (Xe) on hypnotic arousal at skin incision. ⋯ Unlike N2O, Xe was able to suppress hypnotic arousal in response to surgical stimulation when administered with sevoflurane.
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To examine the effect of perfusion on accuracy of two pulse oximeters in children and to determine thresholds of perfusion below which these pulse oximeters become inaccurate or cease to function. ⋯ At the parameters explored in this study, the selected seven perfusion variables (age, weight, core and skin temperature, hemoglobin concentration, pulse pressure, and percent flow by laser Doppler) have little effect on accuracy of pulse oximetry in children.