ANCHORED RF ABLATION DEVICE FOR THE DESTRUCTION OF TISSUE MASSES

摘要

An anchoring member which comprises a support structure and at least one anchor secured to the anchoring member is disclosed. An anchor deflection member is disposed generally externally to and at least partially surrounding and extending along the perimeter of the anchoring member. The anchor deflection member supports the anchoring member for sliding longitudinal movement in directions which result in advancement and retraction of a point on the anchor. The anchor deflection member defines a guide surface positioned on the inside of the anchor deflection member. The guide surface extends longitudinally, and it is configured and dimensioned to slidingly guide the cylindrical anchoring member. A deflection lip is positioned relatively inwardly with respect to the guide surface. The deflection lip is positioned to outwardly deflect the point of the anchor as the anchor is advanced from a position removed from the deflection lip toward the deflection lip into contact with the deflection lip and beyond the deflection lip.