A medical device system for insertion into a patient's anatomy, comprising: an introducer tube defining a lumen therein, the introducer tube defining an opening at a distal end of the introducer tube a medical device disposed within the lumen of the introducer tube in a first position, the medical device being movable within the introducer tube between the first position and a second position, wherein in the second position, the medical device extends at least partially beyond the distal end of the introducer tube, the medical device defining at least one echogenic feature thereon comprising irregularities for allowing visualization of the medical device when the medical device is inserted into the patient's anatomy in the second position； the medical device being a coil which defines a plurality of helical turns.
