Journal of anesthesia
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Journal of anesthesia · Jan 2004
Changes in plasma total and ionized magnesium concentrations and factors affecting magnesium concentrations during cardiac surgery.
The purpose of this study was to measure blood total and ionized magnesium concentrations ([TMg] and [Mg(2+)], respectively) and to investigate factors that might be affecting their changes during cardiac surgery using hypothermic cardiopulmonary bypass. Eight patients were examined. All the patients received diuretics and predeposited autologous blood during surgery. ⋯ Hematocrit decreased significantly from the prebypass period, and FEMg increased significantly after aortic cross-clamping. In conclusion, hemodilution and renal loss were main causes of hypomagnesemia, and citrate in predeposited autologous blood may contribute to the decrease in [Mg(2+)]/[TMg] in the postbypass period. These results suggest that magnesium supplementation under close monitoring of [Mg(2+)] should be required during cardiac surgery.
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Journal of anesthesia · Jan 2004
Duration of vecuronium-induced neuromuscular block can be predicted by change of skin temperature over the thenar muscles.
The purpose of this study was to clarify the relationship between skin temperature over the thenar muscles and the duration of action of vecuronium measured acceleromyographically at the thumb in anesthetized patients. ⋯ Our results show that peripheral ST decreases considerably during open abdominal surgery without reduction in core temperature, and the decrease contributes to the potentiation of neuromuscular block in the periphery during propofol, fentanyl, and nitrous oxide anesthesia.
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Journal of anesthesia · Jan 2004
Randomized Controlled Trial Comparative Study Clinical TrialComparison between a disposable and an electronic PCA device for labor epidural analgesia.
The aims of the present study were (1) to investigate if a disposable patient-controlled analgesia (PCA) device can be used for labor analgesia and (2) to evaluate the device by midwives and parturients. ⋯ The present results imply that the disposable PCA device can be an alternative to the electronic PCA device for labor analgesia.