A device for use in conjunction with a medical device comprises a handle extending longitudinally from a proximal end to a distal end and including a lumen extending therethrough for accommodating a longitudinal probe. A distal end of the handle including a coupling for attachment to a proximal end of a needle device. The handle includes a length adjusting mechanism enabling a user to set a length of the handle at a desired length and a flexible probe sized and shaped for insertion through a lumen of the medical device. A length of the probe is selected relative to a length of the lumen within which it is to be employed so that, when the length of the handle is set at a desired length, insertion of the flexible probe through the lumen to a distal-most position extends a distal portion of the probe distally beyond the distal end of the lumen by a desired distance.
