A medical system includes an insertion device having a working channel, a first medical device, and a second medical device. The first medical device includes a handle, a sheath extending from the handle and defining a lumen, a helical coil, and a loop. The helical coil is axially and rotatably movable relative to the sheath. A first portion of the loop is coupled to the sheath and a second portion of the loop extends radially away from the sheath. The second medical device is configured to be disposed within the working channel of the insertion device. The second medical device is configured to receive the second portion of the loop. The second medical device is configured to couple the second portion of the loop to a portion of a treatment site.