Patent ID: 6663625
Filing Date: 2003-12-16
Classification: A61B

Abstract:
A method of ablating body tissue, comprising:providing a catheter at a targeted ablation site, the catheter including a deployable guide; providing a deployable ablating member including an ablating element to deliver radio-frequency frequency energy to body tissue and an electrical hollow cable to conduct radio-frequency energy between a radio-frequency energy source and the ablating element, the electrical hollow cable comprising: (a) a first elongated electrically conductive tubular member coupled to the ablating element; (b) a second elongated electrically conductive tubular member coupled to the ablating element and disposed in a substantially co-axial relationship over the first elongated tubular member substantially throughout the length of the cable; (c) an elongated tubular dielectric member directly disposed between the first and second elongated electrically conductive tubular members without an air gap therebetween; and (d) an axial lumen through which the deployable guide is slidably received within; deploying the deployable guide out of the catheter at the targeted ablation site; deploying the ablating member out of the catheter by sliding the electrical hollow cable over the deployable guide; and ablating the body tissue with the ablating element.