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Research Article| Volume 15, ISSUE 2, P128-131, November 1929

Studies in the pharmacology of local anesthetics

I. Terminal infiltration of local anesthetics by the dermal wheal method on guinea pigs
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      Abstract

      • 1.
        1. A description is given of a method for terminal infiltration of local anesthetic solutions by dermal wheals on guinea pigs.
      • 2.
        2. The results obtained by this method are affected by the following factors:
        • 2.1.
          a. Age and weight of pig.
        • 2.2.
          b. Amount of local anesthetic.
        • 2.3.
          c. Type of local anesthetic.
        • 2.4.
          d. Fatigue.
      • 3.
        3. The method gives results which correspond closely to those obtained by the dermal wheal method on man.
      • 4.
        4. It is accurate to within less than 10 per cent difference in concentration of local anesthetic solution.
      • 5.
        5. It is more sensitive than the rabbit's cornea method.
      • 6.
        6. It is believed that the rabbit's cornea method, and the guinea pig method together, give results which constitute a reliable index of the value of a local anesthetic.
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