Devices, systems and methods for treating tissue regions of the body

Abstract

Improved devices, systems and methods for treating a tissue region provide straightforward, yet reliable ways for installing diverse functional components within the confined space of a catheter-based instrument.

1 - 22 . (canceled) 
     
     
         23 . An assembly for treating gastroesophageal reflux disease comprising:
 an elongated member including at least one electrode movable between a retracted position and an extended position, and an electrode control at a proximal end of the elongated member to remotely control movement of the electrode, the at least one electrode applying energy to tissue to heat tissue to form lesions at the lower esophageal sphincter to treat gastroesophageal reflux disease;   a distal guide sheath overlying an external surface of the elongated member at a distal portion of the elongated member; and   an endoscope positioned adjacent the elongated member and passing through an opening in the sheath so that the endoscope and elongated member are movable together, wherein steering of a distal end of the endoscope steers a distal end of the elongated member.