A system for providing a continuous passage through a delivery catheter comprising a handle that defines an internal chamber. A first tube having a proximal end and a distal end and a first bore, the first tube being fixedly mounted within the handle, wherein the first bore at the distal end of the first tube is shaped to define a first inverse conical surface. A second tube having a proximal end and a distal end and a second bore, the second tube being slidably mounted within the handle, wherein the second bore is in axial alignment with the first bore. A third tube having a proximal end and a distal end and a third bore.
