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Hypodermic anesthetic injection method

  • US 4,747,824 A
  • Filed: 05/30/1986
  • Issued: 05/31/1988
  • Est. Priority Date: 05/30/1986
  • Status: Expired due to Term
First Claim
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1. A method for anesthetizing body tissue by means of local anesthetic using a hollow hypodermic needle, the steps ofestablishing a uniform flow of anesthetic at a flow rate less than 1.0 cc. per minute through the needle no later than the instant of entry into the tissuemaintaining said uniform flow while moving the needle into the tissue, whereby said flow rate is sufficient to establish and maintain a sheath of liquid anesthetic around the forward portion of the moving needle thereby to anesthetize the path of travel of the needle.

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