METHODS AND DEVICES FOR TREATING URINARY INCONTINENCE
Described herein are devices, systems and methods for treatment of tissue within a lumen of a body. For example, the devices described herein may be used to treat the urethra or gastrointestinal tract, including a sphincter. These devices may provide an expandable element at the distal end of an elongate body and may also include a plurality of electrodes (e.g., needle electrodes) configured to extend from the device and into the tissue to deliver energy to multiple, circumferentially arranged treatment sites. Sufficient energy may be delivered from the device to create a desired tissue effect.
1 . A device for delivering energy to a treatment site in an annular pattern of circumferentially spaced-apart regions in the tissue of a body, the device comprising:
an elongate shaft;
an expandable member near the distal end of the elongate shaft configured to secure the treatment device within the body;
a plurality of needle electrodes configured to extend from the device to contact tissue in an annular array that is circumferentially spaced about the axis, each electrode configured to transmit radio frequency energy to the tissue; and
a temperature sensor for sensing the temperature of the tissue at a treatment site.
2 . The device of claim 1 , further comprising a fluid channel for delivery of a fluid from the device.
3 . The device of claim 1 , further comprising a fluid channel through each of the needle electrodes configured for delivery of a fluid.
4 . The device of claim 1 , further comprising a handle at the proximal end of the device configured to manipulate the device.
5 . The device of claim 1 , wherein the expandable member comprises a basket assembly.
6 . The device of claim 1 , wherein the expandable member comprises a balloon.
7 . The device of claim 1 , further comprising a plurality of temperature sensors.
8 . The device of claim 1 , further comprising a distal cap.
9 . A system for delivering energy to a treatment site in an annular pattern of circumferentially spaced-apart regions in the tissue of a body, the system comprising:
a treatment device comprising:
an elongate shaft;
an expandable member near the distal end of the elongate shaft;
a plurality of needle electrodes configured to penetrate the tissue in an annular array that is circumferentially spaced about the axis of the elongate shaft, each electrode configured to transmit radio frequency energy to the tissue; and
a temperature sensor;
a power source configured to provide radio frequency energy to treatment device;
a controller configured to supply radio frequency energy from the power source at to the needle electrodes to treat the tissue in an annular pattern of individual, circumferentially spaced-apart tissue regions, the controller being coupled to the temperature sensor to control the power supplied by the power source to the electrodes.
10 . The system of claim 9 , wherein the treatment device further comprises a fluid channel for delivery of a fluid from the treatment device.
11 . The system of claim 9 , wherein the treatment device further comprises a handle at the proximal end of the treatment device configured to manipulate the treatment device.
12 . The system of claim 9 , wherein the expandable member of the treatment device comprises a basket assembly.
13 . The system of claim 9 , wherein the expandable member of the treatment device comprises a balloon.
14 . The system of claim 9 , wherein the plurality of needle electrodes are configured to controllably extend from the shaft.
15 . The system of claim 9 , wherein the temperature sensor is located adjacent to the needle electrodes and is configured to sense the temperature of the tissue at a treatment site.
16 . A method of delivering energy to a tissue in an annular pattern of circumferentially spaced-apart treatment sites in the tissue of a patient's body, the method comprising:
providing a treatment device having a plurality of tissue-piercing needle electrodes configured to extend from the treatment device and an expandable member at the distal end of the treatment device;
advancing the treatment device distally within a lumen in a patient's body to a treatment site;
expanding the expandable member;
extending the tissue-piercing needle electrodes from the treatment device into the tissue; and
delivering RF energy from the needle electrodes in an annular pattern of individual, circumferentially spaced-apart tissue regions.
17 . The method of claim 16 , further comprising the step of pulling proximally upon the treatment device until resistance to the pulling is encountered before extending the tissue-piercing needle electrodes.
18 . The method of claim 16 , further comprising introducing a cooling fluid to cool tissue adjacent to the treatment site.
19 . The method of claim 16 , further comprising sensing a tissue temperature, and controlling delivery of RF energy based, at least in part, upon the sensed tissue temperature condition.
20 . The method of claim 16 , wherein the step of advancing the treatment device distally comprises advancing the treatment device within a patient's urethra.
21 . The method of claim 16 , wherein the step of delivering RF energy comprises producing a plurality of submucosal lesions in an annular pattern of individual, circumferentially spaced-apart tissue regions.
22 . A method of delivering energy to a tissue in an annular pattern of circumferentially spaced-apart treatment sites in the tissue in a patient's urethra, the method comprising:
providing a treatment device having a plurality of tissue-piercing needle electrodes configured to extend from the treatment device and an expandable member at the distal end of the treatment device;
advancing the treatment device distally within a patient's urethra;
expanding the expandable member within the patient's bladder;
extending at least one tissue-piercing needle electrode from the treatment device into the tissue; and
delivering RF energy from the needle electrodes in an annular pattern of individual, circumferentially spaced-apart tissue regions.