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Electric pulse applicator using pairs of needle electrodes for the treatment of biological tissue

  • US 5,674,267 A
  • Filed: 12/04/1995
  • Issued: 10/07/1997
  • Est. Priority Date: 03/30/1993
  • Status: Expired due to Term
First Claim
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1. Electric pulse applicator for the treatment of biological tissue allowing an electric field to be applied to cells of biological tissue in such a way as to modify properties of their membrane, comprising:

  • electrodes, the electrodes including at least three needles intended to be introduced into the tissue to be treated and which define a treatment volume, said needles in twos forming pairs of needles;

    a pulse generator sending pulses to the electrodes, the pulse generator having a negative pole and a positive pole;

    a selector switch connected to and arranged between the pulse generator and the electrodes, the selector switch being able to connect each needle with either the negative pole or the positive pole of the pulse generator and thereby can direct the pulses produced by the pulse generator successively onto all the different pairs of needles; and

    a control mechanism connected to the selector switch and pulse generator for controlling the pulse generator and the selector switch so as to form any pairs of needles among the needles.

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