| 摘要 |
<p>Improved electrode assemblies for treating a tissue region at or near a sphincter comprises a support structure (135), and an electrode (66) carried by the support structure for advancement in a path to penetrate the tissue. In one arrangement, the electrode (66) has a non-cylindrical cross section selected to resist deflection when advanced to penetrate tissue. In another arrangement, the electrode includes a tissue stop (121) to resist tissue penetration beyond a selected depth. In another arrangement, the electrode includes a proximal portion formed from a first material, and a distal tissue penetrating portion formed of a second material different from the first. The first material may be, e.g., stainless steel, and the second material may comprise, e.g., nickel titanium.</p> |
