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Technique for drug and chemical delivery

  • US 4,801,459 A
  • Filed: 08/05/1986
  • Issued: 01/31/1989
  • Est. Priority Date: 08/05/1986
  • Status: Expired due to Fees
First Claim
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1. A method of delivering a chemical agent to a preselected area of a body, comprising the steps of:

  • (a) encapsulating said chemical agent within a liposome, said liposome having a predetermined phase transition temperature at which said liposome is capable of releasing said chemical agent;

    (b) injecting said liposome into the blood stream of said body; and

    (c) subjecting said preselected area of said body to nonionizing electromagnetic fields without heating said preselected area of said body to said predetermined phase transition temperature in order to release said chemical agent from said liposome by nonthermal means at a temperature below said predetermined phase transition temperature.

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