Low power tissue ablation system

摘要

Devices, systems and methods are disclosed for the ablation of tissue. Embodiments include an ablation catheter that has an array of ablation elements attached to a deployable carrier assembly. The carrier assembly can be constrained within the lumen of a catheter, and deployed to take on an expanded condition. The carrier assembly includes multiple electrodes that are configured to ablate tissue at low power. Additional embodiments include a system that includes an interface unit for delivering one or more forms of energy to the ablation catheter.

主权项

1. An ablation system for an operator to treat a patient, said system comprising:
an ablation catheter including a first carrier arm having ablation elements and a second carrier arm having ablation elements for delivering thermal ablative energy to tissue, said catheter comprising a flexible shaft with a proximal end and a distal end, each ablation element having an electrical, tissue contact portion configured to deliver thermal ablative energy to tissue, a thermal dissipation portion that is electrically isolated from the electrical portion and configured to dissipate heat from the electrical portion into circulating blood, and a fin projecting from the thermal dissipation portion; an interface unit providing energy to the ablation catheter; and the interface unit monitoring at least one parameter of the system and preventing energy delivered from exceeding a cumulative energy threshold value, the cumulative energy being calculated as a sum of energy delivered over time.