摘要:
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.
摘要:
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.
摘要:
An assembly for treating tissue at or near the sphincter includes a support structure for deployment in a tissue region, and a an electrode carried by the support structure. The support structure includes a spine with a lumen having an exit port, the electrode being deployable from the exit port. The spine also includes a cooling lumen and as aspiration lumen to provide and remove fluids, respectively.
摘要:
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.
摘要:
Systems and methods integrate the control of an energy generator, to supply energy to an electrode structure to heat a tissue region, and the control of a pumping mechanism, to supply cooling fluid to control tissue temperature in the region.
摘要:
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.
摘要:
Expandable assemblies for treating a tissue region at or near a sphincter comprises a support basket formed from an array of spines. A mechanism flexes the spines to expand and collapse the basket. Electrodes carried by the spines for advancement in a path to penetrate the tissue region upon expansion of the basket. The basket can be formed from a mechanical array of molded, jointed spines, or from an extruded tube having axial slits forming the spines.
摘要:
A sphincter tissue region is treated using a support structure sized for advancement into the anal canal. At least one electrode is carried by the structure. A mechanism is coupled to the electrode to move the electrode between a first position retracted in the support structure and a second position extended from the support structure through surface tissue to penetrate a subsurface tissue region at or near a sphincter in the anal canal. A cable is coupled to the electrode to conduct energy for application by the electrode to form a lesion in the subsurface tissue region.
摘要:
A targeted tissue region in a body is treated by a tissue heating element attached to a carrier. The carrier is intended, in use, to be temporarily mounted to an exterior of a catheter body, such as an endoscope. The catheter body is deployed, with the carrier mounted on it, into the targeted tissue region. The tissue heating element is operated, e.g., to form one or more tissue lesions, after which the catheter body is retrieved from the targeted tissue region. The carrier can then be removed from the catheter body, allowing the catheter body to be subsequently used for another purpose.
摘要:
Methods of accessing and ablating abnormal epithelium tissue in an alimentary canal are provided. The methods can include steps of (i) inserting a vacuum source comprising one or more suction ports into an alimentary canal; (ii) inserting an operative element comprising a conduit for a tissue ablation source into the alimentary canal; (iii) positioning the vacuum source and the operative element proximate a portion of the alimentary canal having a site of abnormal tissue to be ablated; (iv) applying a vacuum to at least one of each suction port to draw the tissue against the operative element; and (v) applying the tissue ablation source to the tissue through the conduit to effect tissue ablation.