Abstract:
A method of forming a composite lesion pattern in a tissue region at or near a sphincter comprising providing a catheter having a plurality of energy delivery devices coupled to the catheter. The catheter is introduced at least partially into the sphincter. Energy is delivered from the energy delivery devices to produce the composite lesion pattern. The composite lesion pattern comprises a radial distribution of lesions about the tissue region and a longitudinal distribution of lesions along the tissue region.
Abstract:
A sphincter treatment apparatus includes an energy delivery device introduction member including a proximal end with a first radius of curvature and a distal end with a second radius of curvature. The introduction member is configured to be introduced into the sphincter in a non-deployed state and to be expanded to a deployed state to at least partially expand the sphincter or an adjoining structure. An energy delivery device is coupled to the introduction member. A retainer member is coupled to the energy delivery device introduction member and configured to controllably position the introduction member in an orifice of the sphincter.
Abstract:
An infusion array ablation apparatus includes an elongated delivery device having a lumen and an infusion array positionable in the lumen. The infusion array includes an RF electrode and at least a first and a second infusion member. Each infusion member has a tissue piercing distal portion and an infusion lumen. At least one of the first or second infusion members is positionable in the elongated delivery device in a compacted state and deployable from the elongated delivery device with curvature in a deployed state. Also, at least one of the first or second infusion members exhibits a changing direction of travel when advanced from the elongated delivery device to a selected tissue site. At least one infusion port is coupled to one of the elongated delivery device, the infusion array, the first infusion member or the second infusion member.
Abstract:
This invention provides a method and system for the curative treatment of obesity. A first aspect of this invention is that it enables identification of the nerves responsible for the relaxation of the stomach muscles that occurs prior to and during eating. A second aspect of the invention is that it allows the physician to identify focal nerve sites in the stomach and upper duodenum that are associated with producing sensations of hunger and satiety. Nervous transmission from these sites can be modulated or blocked all together so as to minimize the sensation of hunger. A third aspect of this invention is that allows a physician to shrink selected portions of the innermost oblique muscle and middle circular muscle layers of the stomach. This can be performed in a physician's office using local anesthesia. Shrinkage of these muscles produces a feeling of satiety that enhances the patient's efforts to restrict his caloric intake.
Abstract:
Systems and methods treat a tissue region. In one arrangement, the systems and methods deploy an electrode on a support structure in a tissue region at or near the cardia of the stomach. 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 systems and 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. In another arrangement, the systems and methods treat abnormal epithelium tissue at or near the lower esophageal sphincter by bringing an array of surface electrodes into contact with abnormal epithelium tissue. The systems and methods couple the surface electrodes to a source of radio frequency energy to ohmically heat tissue and cause necrosis of the abnormal epithelium tissue.
Abstract:
Multiple electrodes are coupled together in monopolar or bipolar arrays to form lesion patterns in tissue regions at or near a sphincter. A controller couples the electrodes to a generator so that a single power channel serves more than a single electrode.
Abstract:
Systems and methods treat a tissue region at or near a sphincter by deploying a carrier, which carries an electrode that can be advanced to penetrate tissue. Negative pressure is applied through a suction port on the carrier near the electrode, to draw tissue in the tissue region inward against the carrier. The systems and methods advance the electrode to penetrate tissue drawn against the carrier. The vacuum anchors the surrounding tissue and mediates against the “tenting” of tissue during electrode penetration. Without tenting, the electrode penetrates mucosal tissue fully, to obtain a desired depth of penetration.
Abstract:
Systems and methods deploy an electrode structure in contact with the tissue region. The electrode structure carries a sensor at a known location on the electrode structure to monitor an operating condition. The systems and methods provide an interface, which generate an idealized image of the electrode structure and an indicator image to represent the monitored operating condition in a spatial position on the idealized image corresponding to the location of the sensor on the electrode structure. The interface displays a view image comprising the idealized image and indicator image. The systems and methods cause the electrode structure to apply energy to heat the tissue region while the view image is displayed on the display screen.
Abstract:
This is a method and an apparatus for the treatment or introduction of contrast fluids into tissue, particularly cardiac tissue. The apparatus includes a catheter having an elongated flexible body and a tissue infusion apparatus including a hollow infusion needle configured to secure the needle into the tissue when the needle is at least partially inserted into the tissue to help prevent inadvertent removal of the needle from the tissue. This permits the selected treatment or contrast fluid to be confined to a specific site. The catheter may also include a visualization assembly including a transducer at the distal end of the body.
Abstract:
A sphincter treatment apparatus has an introducer means including a distal portion means. An expandable device means includes a plurality of arm means. Each arm means of the plurality has a distal section means and a proximal section means. Each of distal sections means of the arm means are coupled and each of the proximal sections means of the arm means are coupled to the introducer means distal portion means. The expandable device means is configured to at least partially dilate a sphincter in a deployed state. An energy delivery device means is introduceable from the introducer means into a selected site of the sphincter. The energy delivery device means is configured to deliver sufficient energy to reduce a frequency of relaxation of the sphincter.