×

Systems and methods for ablating body tissue using predicted maximum tissue temperature

  • US 5,735,846 A
  • Filed: 05/01/1995
  • Issued: 04/07/1998
  • Est. Priority Date: 06/27/1994
  • Status: Expired due to Term
First Claim
Patent Images

1. An apparatus for ablating body tissue comprisinga source of ablation energy,an electrode coupled to the source for contacting tissue at a tissue-electrode interface to transmit ablation energy at a determinable power level to create a maximum tissue temperature condition beneath the tissue-electrode interface,a heat removal element connected to remove heat from the electrode at a determinable rate,a temperature sensing element in thermal conductive contact with the electrode to sense temperature of the electrode,a processing element coupled to the source and the temperature sensing element to sample the power level at which the electrode transmits ablation energy and the temperature of the electrode sensed by the temperature sensing element, to derive therefrom a prediction of the maximum tissue temperature condition without sampling an actual tissue temperature beneath the tissue-electrode interface, and to control the power level of ablation energy transmitted by the electrode based, at least in part, upon the prediction of the maximum tissue temperature.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×