• Anesthesia and analgesia · Sep 1980

    Mixtures of local anesthetics: bupivacaine-chloroprocaine.

    • A Galindo and T Witcher.
    • Anesth. Analg. 1980 Sep 1; 59 (9): 683-5.

    AbstractExperiments were performed in a rat sciatic nerve preparation to determine the characteristics of nerve blocks produced by a combination of commercially available solutions of bupivacaine and chloroprocaine. A mixture of equal parts of commercially available chloroprocaine 2% and bupivacaine 0.5% resulted in a nerve blockade with characteristics of a chloroprocaine block. Changing the pH value of this mixture from 3.60 to 5.56 changed these characteristics to a blockade resembling that produced by bupivacaine. It is concluded that the nerve blockades obtained by mixing commercially available solutions of local anesthetics are unpredictable and may depend on a number of factors which include not only the types of drugs but the pH of the mixture.

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