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Systems and methods for making and using medical ablation systems having mapping catheters with improved anchoring ability

  • US 9,480,521 B2
  • Filed: 05/20/2014
  • Issued: 11/01/2016
  • Est. Priority Date: 08/14/2009
  • Status: Active Grant
First Claim
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1. An ablation system comprising:

  • an ablation catheter having a distal portion and a proximal portion, the ablation catheter configured and arranged for insertion into patient vasculature;

    an expansion element coupled to the distal portion of the ablation catheter, the expansion element configured and arranged for ablating patient tissue;

    a coolant transfer tube disposed within the ablation catheter and in fluid communication with the expansion element;

    a mapping catheter comprising an elongated body insertable through the ablation catheter and the expansion element, the elongated body comprising a distal end that is extendable from a distal end of the expansion element, the distal end of the elongated body comprising a distal portion including a plurality of electrodes and a proximal reduced-dimension portion adjacent the distal portion, the proximal reduced-dimension portion having a cross-sectional dimension that is less than corresponding cross-sectional dimensions of the distal portion, wherein the distal end of the elongated body is formed, at least in part, from a shape memory material that bends into a preformed shape upon release from a confined space, the preformed shape comprising a loop transverse to a longitudinal axis of the elongated body; and

    a control module coupled to the ablation catheter and the mapping catheter, the control module configured and arranged for controlling mapping of electrical activity by the mapping catheter and ablation of patient tissue by the expansion element.

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