Medical devices and related methods for delivering energy and/or fluid

A medical device for delivering energy and/or fluid, the medical device comprising:

• a handle including a hub for electrically connecting the medical device to an energy source;
• a shaft extending distally from the handle, wherein the shaft includes an outer sheath, an inner sheath, and a control wire;
• a fluid port configured to deliver fluid through at least a portion of the shaft;
• an end cap, wherein the end cap includes an opening extending longitudinally through a portion of the end cap;
• and
• an end effector at a distal end of the shaft, wherein the end effector includes a loop portion and an electrode coupled to a distal end of the loop portion, wherein the electrode includes a proximal longitudinal portion, a distal longitudinal portion, and a tapered portion between the proximal longitudinal portion and the distal longitudinal portion, wherein a portion of the electrode extends through the opening of the end cap, wherein a proximal end of the loop portion is coupled to a distal end of the control wire such that movement of the control wire controls a position of the end effector relative to the distal end of the shaft, and wherein the tapered portion is configured to engage with a proximal portion of the end cap to advance the end cap distally.

A method of treating a treatment site, the method comprising:

• delivering a distal end of a shaft of a medical device to the treatment site, wherein the medical device includes a handle, a shaft with a distal end, and an end effector movable relative to the distal end of the shaft, wherein the shaft includes an outer sheath, an inner sheath, and an end cap, wherein the end cap includes an opening extending longitudinally through a portion of the end cap, wherein the end effector includes an electrode and a loop portion, wherein a portion of the electrode extends through the opening of the end cap, wherein the electrode includes a proximal longitudinal portion, a distal longitudinal portion, and a tapered portion between the proximal longitudinal portion and the distal longitudinal portion, wherein the handle includes a movable body and a main body, and wherein movement of the movable body controls a position of the end effector;
• delivering energy to the treatment site with the electrode of the end effector;
• delivering fluid to the treatment site, wherein delivering fluid includes delivering fluid through a port coupled to one or more of the inner sheath and the outer sheath to deliver fluid distally through a cavity between the inner sheath and the outer sheath such that the fluid flows distally into a distal cavity within the outer sheath and into an electrode lumen via one or more inlets in a proximal portion of the electrode;
• extending the end effector distally, wherein extending the end effector distally includes distally advancing the movable body of the handle to urge the end effector distally such that the tapered portion of the electrode engages with a proximal portion of the end cap to advance the end cap distally;
• and
• delivering energy to the treatment site with the loop portion of the end effector.