| 摘要 |
<p>An ablation apparatus includes an introducer (14) with a distal end (14') sufficiently sharp to penetrate tissue (28). An energy delivery device (12) is configured to be coupled to an energy source (20). The energy delivery device (12) includes a first electrode (16) and a second electrode (16) each with a tissue piercing distal portion. The first and second electrodes (16) are at least partially positionable in the introducer (14) and deployable from the introducer (14) at a selected tissue site (28) to an expanded state. In the expanded state the deployed first and second electrodes (16) distend laterally away from the introducer (14) with a radius of curvature to form a shaped array of deployed electrodes (16) at the tissue site (28) when positioned at the selected tissue site (28). The first electrode distal portion (16') and the second electrode distal portion (16') are each at least partially made of a shaped memory alloy material that displays stress induced martensite behavior above body temperature. A cable (22) couples the energy source (20) to the energy delivery device (12).</p> |
