Method for treating fecal incontinence
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.
1. A method for treating fecal incontinence comprising
inserting a transparent structure into an anal cavity, the transparent structure having a plurality of guide channels,
visualizing from outside the anal cavity a dentate line within the anal canal through the transparent structure,
while visualizing the dentate line, slidably advancing a plurality of electrodes through the guide channels into tissue at or near an anal sphincter above the dentate line, the electrodes having a bend,
applying energy through the electrodes to create a lesion in the sphincter, and
conveying fluid into contact with the tissue to cool the tissue while applying energy to the electrodes.
2. A method according to claim 1 , wherein the electrodes are deployed through openings in the transparent structure, the electrodes returning from a straightened position to a bent position when advanced from the transparent structure.
3. A method according to claim 2 , wherein the electrodes are mounted on a shuttle and movement of an actuator slides the shuttle distally to advance the electrodes through the guide channels and out of openings in the transparent structure.
4. A method according to claim 3 , wherein the shuttle is coupled by a pivot link to a lever.
5. A method according to claim 1 , wherein the energy applied is radiofrequency energy.
6. A method according to claim 1 , further comprising the steps of inserting an introducer through the transparent structure for insertion of the introducer and transparent structure together into the anal cavity and removing the introducer after insertion through the anal cavity and positioning of the transparent structure.
7. A method according to claim 1 , wherein the step of slidably advancing the plurality of electrodes advances the electrodes on only one side of the transparent structure.
8. A method according to claim 1 , wherein the electrodes have penetrating tips and the step of slidably advancing the electrodes advances the penetrating tips through tissue.
9. A method according to claim 1 , wherein the transparent structure includes a distal port for aspiration and further includes a proximal region, the proximal region having a first fitting for connection to a fluid delivery apparatus and a second fitting for connection to an aspirating apparatus.
10. A method according to claim 1 , wherein the electrodes include insulating material and in the step of applying energy through the electrodes the insulating material insulates a mucosal surface of a patient's rectum from direct exposure to energy.
11. A method according to claim 1 , wherein the electrodes are deployed in a posterior direction and not in an anterior direction.
12. A method according to claim 1 , further comprising the step of sensing temperature near the electrodes utilizing temperature sensors carried by the electrodes.
13. A method according to claim 12 , further comprising the step of sensing tissue surface temperature conditions near the electrodes utilizing temperature sensors carried by the transparent structure.
14. A method according to claim 1 , further comprising a locking pawl to lock an advanced position of the electrodes and a release to free the locking pawl.