The Effect of L-bupivacaine on BIS Levels in the Maintenance Doses of Propofol and Fentanyl during General Anesthesia in Chinese People

 

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Abstract

Introduction:

Levorotatory forms of amino-amide class of epidural anesthetics are considered to be better than their dextrorotatory counterparts in the way that they are associated with less toxicity and improved absorption and bioavailability.

Methods:

In this study we compared the effect of 2 enantiomers; namely racemic preparation of bupivacaine with pure formulation of its levorotatory form levobupivacaine on the dosage requirements for general anesthesia propofol in a series of 273 patients admitted to hospital of China for nephrectomy. We also compared the effect of epidural anesthetics on intra- and postoperative plasma levels of epinephrine, glucose and cortisol.

Results:

Our results indicate that levobupivacaine is associated with lower dose requirements of propofol as compared to bupivacaine (3.45±0.5 vs. 4.44±0.5 mg/kg/h). Levo-bupivacaine also attenuated the postoperative stress response as indicated by significant reduction plasma epinephrine levels.

Conclusion:

Our results suggest that levobupivacaine might be more effective as epidural anesthetic in combined regimen as compared to bupivacaine.

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