Abstract:
Methods treat a tissue region. In one arrangement, the methods deploy an electrode on a support structure in a tissue region at or near the cardia of the stomach. In one embodiment, the support structure has a proximal region and a distal region. The proximal region is enlarged in comparison to the distal region, and the electrode is carried by the enlarged proximal surface. The methods advance the electrode in a path to penetrate the tissue region and couple the electrode to a source of radio frequency energy to ohmically heat tissue and create a lesion in the tissue region.
Abstract:
A method of treating a sphincter that provides an expandable basket structure with a first energy delivery device. The basket structure is introduced in a sphincter. The first energy delivery device is advanced from the basket structure into an interior of the sphincter. Sufficient energy is delivered from the first energy delivery device to create a desired tissue effect in the sphincter. Thereafter, the basket structure is removed from the sphincter.
Abstract:
Improved electrode assemblies for treating a tissue region at or near a sphincter comprise a support structure and an electrode carried by the support structure for advancement in a path to penetrate the tissue region. In one arrangement, the electrode has a non-cylindrical cross section selected to resist deflection when advanced to penetrate the tissue region. In another arrangement, the electrode includes a tissue stop 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 than the first material. The first material can comprise, e.g., stainless steel, and the second material can comprise, e.g., nickel titanium.
Abstract:
A fluidic media introduction apparatus for closing an opening in a vessel wall includes an elongated member with a fluidic media introduction port and a guide wire lumen. The guide wire lumen extends from a proximal portion to a distal portion of the elongated member. A fluidic media mixing chamber is positioned in the elongated member and coupled to a fluidic media introduction port. A fluidic media delivery lumen is coupled to the mixing chamber. A fluidic media advancement port is positioned at the distal portion of the elongated member. An inflatable member is coupled to the distal portion of the elongated member.
Abstract:
Assemblies for treating a tissue region at or near a sphincter have a support structure with a distal end and an electrode carried by the support structure for contact with the tissue region. A lumen in the support structure accommodates passage of a body through the support structure and beyond the distal end of the support structure. The body can comprise a guide wire to guide deployment of the support structure, or an endoscope to permit visualization of the support structure from beyond the distal end of the support structure.