A device and methodology for gaining access into a body cavity of a patient is described and which includes an elongated sheath; an elongated dilator which is telescopingly received in the sheath, and wherein the elongated dilator has a distal end which is received within a body cavity to be accessed, a selectively inflatable occlusion balloon mounted on the dilator, and first and second sources of pressurized fluid which is coupled in fluid flowing relation relative to the dilator, and which further is effective, on the one hand, for inflating the occlusion balloon, and secondly for delivery into the body cavity of the patient based on the desires of a clinician.